Live/247 Rank/Maryland

Maryland 24/7 Rank

Every station in Maryland ranked by its 247 score out of 100: how reliably it reports, how accurate its readings are against a reference station, how they pass their checks and how they stand against the forecast, over the last seven days.

736 stations ranked21.0% sent every report dueranked October 16, 2026page 3 of 3Maryland instrumentsMaryland weather

A station is ranked once its week holds enough reports to measure: 12, or 3 days for a gauge that reports once a day. Of the 736 ranked here, 731 have a page of their own; the rest are platforms heard here that have not yet reported enough to be listed.

Every station, ranked

Rank	Station	Score	Network	County	Received	Reports	Arrives in	Longest silence
450	I-68 WB at Old Morgantown RoadMD138	82.2	Road	Garrett	68.2%	344 of 504	25 min	2.3 h
450	US-301 NB S of MD-6MD139	82.2	Road	Charles	68.2%	344 of 504	25 min	2.3 h
450	MD-404 WB E of MD-312MD142	82.2	Road	Caroline	68.2%	344 of 504	25 min	2.3 h
450	I-68 W-2 Mi Prior to Ex. 47MD144	82.2	Road	Allegany	68.2%	344 of 504	25 min	2.3 h
450	MD 295 NB at MD 202MD146	82.2	Road	Prince Georges	68.2%	344 of 504	25 min	2.3 h
450	I-70 W of I-270MD153	82.2	Road	Frederick	68.2%	344 of 504	25 min	2.3 h
507	I-795 at MD-140MD043	82.2	Road	Carroll	68.0%	343 of 504	25 min	2.3 h
507	US-29 at Mid PatuxentMD053	82.2	Road	Montgomery	68.0%	343 of 504	25 min	2.3 h
507	I-270 NB at Comus RoadMD136	82.2	Road	Montgomery	68.0%	343 of 504	25 min	2.3 h
510	WestminsterDMW	82.1	Airport	Carroll	81.5%	411 of 504	12 min	20.3 h
511	Citizen station GW7346GW7346	82.1	Citizen	Anne Arundel	58.1%	293 of 504	19 s	2.2 h
512	Pikesville 1.8 SWMD-BL-38	82.0	Volunteer	Baltimore	57.1%	4 of 7	5.4 h	3.6 days
513	Citizen station W4RAH-1W4RAH-1	81.9	Citizen	Frederick	57.4%	193 of 336	16 s	3.3 h
514	Unnamed Tributary AT Lake Arbor TailwaterLKDM2	81.8	Gauge	Prince Georges	76.7%	129 of 168	18 min	33 h
515	Citizen station EW2809EW2809	81.8	Citizen	Montgomery	59.3%	299 of 504	18 s	2.8 h
516	Little Patuxent River AT CentennialCTNM2	81.8	Gauge	Howard	55.0%	370 of 672	13 min	60 min
517	Baltimore - Heliport4MD	81.6	Airport	Baltimore City	74.8%	377 of 504	12 min	10.7 h
518	Citizen station FW6627FW6627	81.6	Citizen	Charles	58.3%	98 of 168	20 s	7.8 h
519	Citizen station DW0501DW0501	81.6	Citizen	Howard	57.9%	292 of 504	17 s	2 h
520	Citizen station EW5391EW5391	81.6	Citizen	Anne Arundel	55.5%	140 of 252	20 s	3.8 h
521	EastonESN	81.6	Airport	Talbot	55.1%	278 of 504	12 min	2 h
522	Citizen station FW9050FW9050	81.5	Citizen	Howard	58.4%	310 of 530	19 s	2.3 h
523	US-15 at MD-140MD051	81.4	Road	Frederick	96.4%	324 of 336	26 min	2.7 h
524	Citizen station FW5872FW5872	81.4	Citizen	Montgomery	57.7%	97 of 168	19 s	7.8 h
525	Citizen station GW1431GW1431	81.4	Citizen	Carroll	57.0%	230 of 403	18 s	3.1 h
526	Citizen station FW4495FW4495	81.4	Citizen	Anne Arundel	56.7%	114 of 201	19 s	5.3 h
527	Citizen station DW8623DW8623	81.4	Citizen	Carroll	56.4%	299 of 530	18 s	2.2 h
528	I-83 at I-695MD008	81.3	Road	Baltimore	71.6%	344 of 480	25 min	2.3 h
529	Citizen station KC3ECOKC3ECO	81.3	Citizen	Harford	58.7%	148 of 252	19 s	5 h
530	I-68 WB at Lower New Germany Roa MD US MDDOTMD137	81.1	Road	Garrett	67.2%	339 of 504	25 min	3 h
531	Citizen station DW4047DW4047	81.1	Citizen	Carroll	56.5%	228 of 403	19 s	3.2 h
532	MD-344 at MD-224MD105	80.9	Road	Charles	65.2%	313 of 480	26 min	2.7 h
533	Citizen station GW1083GW1083	80.9	Citizen	Baltimore	55.5%	224 of 403	17 s	3.1 h
534	Western Branch AT Upper MarlboroUPRM2	80.8	Gauge	Prince Georges	58.5%	295 of 504	17 min	2 h
535	Frederick Muni AptFDK	80.7	Airport	Frederick	58.9%	297 of 504	12 min	2 h
536	Citizen station KG1JAGKG1JAG	80.6	Citizen	Howard	59.1%	298 of 504	19 s	2.8 h
537	Citizen station EW8552EW8552	80.6	Citizen	Montgomery	54.7%	46 of 84	22 s	12 h
538	Nw Branch Anacostia River 1 W HyattsvilleACOM2	80.6	Gauge	Prince Georges	53.2%	358 of 672	16 min	60 min
539	Indian Creek AT Beltsville - Odell RdBVLM2	80.6	Gauge	Prince Georges	51.7%	348 of 672	13 min	60 min
540	Unnamed Tributary AT Heritage Glen DamHGDM2	80.6	Gauge	Prince Georges	51.6%	347 of 672	13 min	60 min
541	US 50 WB at Bloomingdale RoadMD109	80.5	Road	Queen Anne's	65.6%	331 of 504	25 min	3.1 h
542	I-495 @ Connecticut AveMD057	80.4	Road	Prince Georges	62.9%	317 of 504	25 min	2.3 h
543	Citizen station FW4365FW4365	80.4	Citizen	Baltimore	54.7%	93 of 170	15 s	7.5 h
544	Citizen station K3TXT-1K3TXT-1	80.3	Citizen	Anne Arundel	55.4%	559 of 1,008	18 s	72 min
545	Citizen station FW3819FW3819	80.2	Citizen	Montgomery	55.0%	308 of 560	17 s	2.3 h
546	Citizen station DW1546DW1546	80.2	Citizen	Howard	54.4%	122 of 224	18 s	6 h
547	Baltimore/MartinMTN	80.2	Airport	Baltimore	54.1%	273 of 504	12 min	3 h
548	Citizen station GW3347GW3347	80.0	Citizen	Anne Arundel	56.5%	95 of 168	18 s	8.8 h
549	Citizen station FW7930FW7930	80.0	Citizen	Carroll	51.6%	113 of 219	18 s	4.8 h
550	I-68 EB at Street RoadMD141	79.9	Road	Allegany	68.2%	344 of 504	25 min	2.3 h
551	Alert StationRNDM2	79.8	Gauge	Baltimore	48.7%	98 of 201	13 min	3.2 h
552	Citizen station GW0092GW0092	79.7	Citizen	Worcester	50.6%	111 of 219	13 s	4.7 h
553	I-270 @ I-370MD001	79.6	Road	Montgomery	69.5%	334 of 480	26 min	2.7 h
554	Citizen station EW7774EW7774	79.6	Citizen	Montgomery	54.2%	547 of 1,008	17 s	1.6 h
555	Citizen station EW5309EW5309	79.6	Citizen	Montgomery	53.6%	216 of 403	17 s	3.7 h
556	Citizen station FW9615FW9615	79.5	Citizen	Howard	50.4%	113 of 224	18 s	4.8 h
557	Citizen station FW4808FW4808	79.4	Citizen	Carroll	54.6%	306 of 560	20 s	2.7 h
558	Citizen station KC3BAN-13KC3BAN-13	79.4	Citizen	Anne Arundel	51.5%	260 of 504	18 s	2.5 h
559	Stony Run At Cold Spring LaneSTOM2	79.3	Gauge	Baltimore City	52.6%	354 of 672	13 min	1.7 h
560	Citizen station CW7109CW7109	79.1	Citizen	Baltimore	51.9%	131 of 252	20 s	5.7 h
561	EmmitsburgEMMM2	79.0	Cooperative	Frederick	71.4%	5 of 7	24.3 h	2.6 days
562	Citizen station KB3PHDKB3PHD	79.0	Citizen	Prince George's	59.5%	150 of 252	19 s	4.2 h
563	Woodbine 4.8 SSWMD-HW-56	79.0	Volunteer	Howard	42.8%	3 of 7	26 min	3 days
564	Sykesville 2.6 SEMD-HW-12	79.0	Volunteer	Howard	42.8%	3 of 7	26 min	24 h
565	Birdsville 0.2 WSWMD-AA-1	79.0	Volunteer	Anne Arundel	42.8%	3 of 7	26 min	3 days
566	Annapolis 1.2 SEMD-AA-59	79.0	Volunteer	Anne Arundel	42.8%	3 of 7	86 min	2.5 days
567	Parsonsburg 2.7 SMD-WC-28	79.0	Volunteer	Wicomico	42.8%	3 of 7	86 min	37.1 h
568	Laurel 3.9 EMD-AA-90	79.0	Volunteer	Anne Arundel	42.8%	3 of 7	86 min	3 days
569	Bryantown 1.9 NEMD-CH-41	79.0	Volunteer	Charles	42.8%	3 of 7	2.4 h	3 days
570	Princess Anne 1.9 WSWMD-SS-13	79.0	Volunteer	Somerset	42.8%	3 of 7	2.4 h	2.5 days
571	Citizen station CW9692CW9692	78.9	Citizen	Anne Arundel	60.1%	101 of 168	20 s	6.5 h
572	Citizen station CW1084CW1084	78.9	Citizen	Calvert	55.7%	281 of 504	17 s	2.7 h
573	Citizen station GW6061GW6061	78.9	Citizen	Baltimore	50.0%	95 of 190	19 s	6.5 h
574	Citizen station N3TCR-13N3TCR-13	78.8	Citizen	Frederick	61.3%	103 of 168	18 s	5.3 h
575	Citizen station EW1760EW1760	78.8	Citizen	Saint Mary's	60.5%	305 of 504	18 s	2 h
576	Citizen station K2EJ-13K2EJ-13	78.8	Citizen	Harford	50.8%	171 of 336	17 s	4.2 h
577	NorthbendNBDM2	78.8	Gauge	Baltimore City	44.1%	212 of 480	13 min	66 min
578	Citizen station DW0282DW0282	78.7	Citizen	Saint Mary's	55.5%	1,400 of 2,520	18 s	59 min
579	Citizen station FW5327FW5327	78.7	Citizen	Charles	51.7%	106 of 205	15 s	7.6 h
580	Citizen station TLEEKTOWNTLEEKTOWN	78.7	Citizen	Montgomery	50.8%	342 of 672	17 s	2.2 h
581	Citizen station GW8019GW8019	78.7	Citizen	Prince George's	50.8%	114 of 224	18 s	6.5 h
582	US-50 at OC DrawbridgeMD135	78.6	Road	Worcester	68.2%	344 of 504	22 min	2.3 h
583	Citizen station EW4096EW4096	78.6	Citizen	Frederick	63.4%	320 of 504	19 s	3.2 h
584	Citizen station CW3783CW3783	78.6	Citizen	Baltimore	53.5%	180 of 336	11 s	3.7 h
585	Citizen station EW5058EW5058	78.6	Citizen	Talbot	51.0%	147 of 288	16 s	5.3 h
586	Citizen station GW4300GW4300	78.6	Citizen	Anne Arundel	50.4%	318 of 630	20 s	2.3 h
587	Citizen station DW2274DW2274	78.6	Citizen	Harford	50.0%	112 of 224	16 s	6 h
588	North Beach 1.8 WNWMD-CV-21	78.6	Volunteer	Calvert	42.8%	3 of 7	86 min	3.5 days
589	Citizen station GW1129GW1129	78.5	Citizen	Harford	51.7%	116 of 224	17 s	7.8 h
590	Deal Island 0.5 SSWMD-SS-12	78.5	Volunteer	Somerset	42.8%	3 of 7	26 min	3.5 days
591	Riverdale 0.1 SWMD-PG-107	78.5	Volunteer	Prince Georges	42.8%	3 of 7	86 min	3.5 days
592	Taneytown 3.8 NEMD-CR-5	78.5	Volunteer	Carroll	42.8%	3 of 7	86 min	3.5 days
592	Potomac 2.6 NEMD-MG-123	78.5	Volunteer	Montgomery	42.8%	3 of 7	86 min	3.5 days
594	Bel Air 1.7 WMD-HR-11	78.5	Volunteer	Harford	42.8%	3 of 7	2.4 h	3.5 days
595	Citizen station GW4058GW4058	78.4	Citizen	Howard	48.5%	163 of 336	17 s	3.7 h
596	Deep Creek LakeOKLM2	78.2	Cooperative	Garrett	42.8%	3 of 7	31 min	4 days
597	Princess AnnePRAM2	78.1	Cooperative	Somerset	42.8%	3 of 7	2 h	4 days
598	Citizen station DW0226DW0226	78.0	Citizen	Saint Mary's	52.3%	176 of 336	19 s	6.4 h
599	Citizen station N1LIDN1LID	78.0	Citizen	Saint Mary's	50.3%	338 of 672	16 s	2.5 h
600	Crofton 1.1 SSEMD-AA-71	78.0	Volunteer	Anne Arundel	42.8%	3 of 7	3.4 h	3.5 days
601	Citizen station FW9340FW9340	77.9	Citizen	Montgomery	48.2%	108 of 224	15 s	6.3 h
602	Gunpowder Falls AT GlencoeGCEM2	77.8	Gauge	Baltimore	70.8%	119 of 168	21 min	2.1 days
603	Citizen station GW0807GW0807	77.8	Citizen	Dorchester	51.8%	249 of 480	16 s	4.5 h
604	Citizen station EW7149EW7149	77.7	Citizen	Carroll	49.8%	201 of 403	17 s	4.4 h
605	Alert GagePIKM2	77.7	Gauge	Baltimore	44.2%	99 of 224	13 min	3.3 h
606	Citizen station GW3211GW3211	77.6	Citizen	Anne Arundel	55.7%	234 of 420	18 s	2.8 h
607	North Laurel 1.5 ESEMD-HW-21	77.6	Volunteer	Howard	42.8%	3 of 7	4.4 h	3.5 days
608	Maryland Alert GageELKM2	77.4	Gauge	Baltimore	44.5%	408 of 916	13 min	56 min
609	Citizen station KC3SPD-13KC3SPD-13	77.2	Citizen	Allegany	50.9%	257 of 504	19 s	3.7 h
610	I-68 at Md 55MD035	77.0	Road	Allegany	68.2%	344 of 504	25 min	2.3 h
611	Citizen station FW5836FW5836	76.9	Citizen	Harford	50.6%	170 of 336	18 s	4.3 h
612	Citizen station GW4786GW4786	76.9	Citizen	Carroll	48.5%	326 of 672	18 s	2.9 h
613	Baltimore - Inlet to PatapscoIHBM2	76.9	Gauge	Baltimore City	43.3%	397 of 916	13 min	56 min
614	Citizen station DW2537DW2537	76.8	Citizen	Anne Arundel	48.3%	325 of 672	18 s	2.5 h
615	Citizen station EW5728EW5728	76.8	Citizen	Queen Anne's	48.2%	324 of 672	17 s	2.2 h
616	MD-77 EB at Catoctin State Park MD US MDDOTMD143	76.7	Road	Frederick	67.8%	342 of 504	25 min	2.3 h
617	Citizen station DW1590DW1590	76.7	Citizen	Howard	49.2%	101 of 205	20 s	6.2 h
618	Pasadena 0.7 SEMD-AA-10	76.7	Volunteer	Anne Arundel	42.8%	3 of 7	7.4 h	3 days
619	Huntingtown 1.6 NNEMD-CV-35	76.7	Volunteer	Calvert	42.8%	3 of 7	7.4 h	3 days
620	Citizen station CW1032CW1032	76.6	Citizen	Baltimore	50.7%	341 of 672	18 s	3.3 h
621	I-68 @ US-219MD014	76.5	Road	Garrett	70.4%	355 of 504	22 min	23.7 h
622	Citizen station EW1476EW1476	76.4	Citizen	Howard	47.3%	106 of 224	18 s	7 h
623	Citizen station CW1676CW1676	76.3	Citizen	Howard	44.6%	50 of 112	20 s	8.5 h
624	Citizen station CW6668CW6668	76.2	Citizen	Montgomery	46.8%	105 of 224	18 s	9.3 h
625	Montgomery Village 1.3 SSWMD-MG-1	76.2	Volunteer	Montgomery	42.8%	3 of 7	8.4 h	3 days
626	Southwest Branch 1 S Truman Drive/LargoHTNM2	76.2	Gauge	Prince Georges	40.2%	312 of 775	13 min	60 min
627	Citizen station CW1662CW1662	76.1	Citizen	Washington	51.3%	207 of 403	17 s	5.2 h
628	Citizen station EW1783EW1783	76.0	Citizen	Washington	47.0%	103 of 219	18 s	10.3 h
629	Kenilworth Ave./Walker BranchGBLM2	76.0	Gauge	Prince Georges	44.6%	100 of 224	13 min	6 h
630	Citizen station CW5307CW5307	75.9	Citizen	Howard	45.8%	308 of 672	17 s	3 h
631	GreenbeltGBTM2	75.8	Gauge	Prince Georges	41.0%	41 of 100	18 min	8.7 h
632	Citizen station DW3949DW3949	75.7	Citizen	Montgomery	50.4%	254 of 504	16 s	3.4 h
633	Citizen station FW4773FW4773	75.6	Citizen	Anne Arundel	44.2%	99 of 224	16 s	8.2 h
634	Paint Branch AT Hillandale - Powder MillHNDM2	75.6	Gauge	Prince Georges	37.2%	44 of 118	13 min	6 h
635	Little Paint Branch AT Calverton - Briggs Chaney RdCVTM2	75.4	Gauge	Prince Georges	40.8%	374 of 916	13 min	70 min
636	Citizen station CW4047CW4047	75.3	Citizen	Montgomery	45.0%	216 of 480	17 s	4.5 h
637	US-40 W at MD-755MD112	75.2	Road	Harford	63.2%	319 of 504	25 min	12.5 h
638	Citizen station FW3881FW3881	75.2	Citizen	Frederick	55.1%	278 of 504	17 s	2.7 h
639	Citizen station FW6165FW6165	75.0	Citizen	Montgomery	42.8%	105 of 245	17 s	6.2 h
640	Citizen station CW1323CW1323	74.9	Citizen	Washington	49.2%	331 of 672	17 s	3.7 h
641	Silver Spring 5.6 NMD-MG-71	74.8	Volunteer	Montgomery	42.8%	3 of 7	11.4 h	3 days
642	Citizen station CW1550CW1550	74.7	Citizen	Baltimore	43.4%	146 of 336	18 s	6.5 h
643	Lottsford RoadLOTM2	74.6	Gauge	Prince Georges	37.2%	341 of 916	13 min	60 min
644	Citizen station CW0608CW0608	74.3	Citizen	Baltimore	41.6%	105 of 252	13 s	8.4 h
645	Herring Run At Route 40HRRM2	74.3	Gauge	Baltimore City	37.2%	375 of 1,008	13 min	60 min
646	Citizen station GW4014GW4014	74.2	Citizen	Howard	51.1%	215 of 420	16 s	3.3 h
647	East New Market 0.0 WNWMD-DR-10	74.0	Volunteer	Dorchester	57.1%	4 of 7	25.4 h	2 days
648	Glenwood 1.2 SSWMD-HW-47	74.0	Volunteer	Howard	57.1%	4 of 7	25.4 h	2 days
649	MarlboroMBOM2	74.0	Gauge	Prince Georges	41.3%	119 of 288	13 min	6 h
650	Bear Branch AT Laurel LakeLLBM2	73.7	Gauge	Prince Georges	35.5%	358 of 1,008	13 min	60 min
651	Citizen station CW2157CW2157	73.6	Citizen	Talbot	52.1%	210 of 403	17 s	20.7 h
652	Rock Hall 2.2 NNWMD-KN-10	73.0	Volunteer	Kent	28.5%	2 of 7	3.4 h	3.5 days
653	Westview - Alert GageWSVM2	72.9	Gauge	Baltimore	34.7%	100 of 288	13 min	4 h
654	Citizen station FW2392FW2392	72.5	Citizen	Carroll	50.6%	189 of 373	17 s	22.1 h
655	Citizen station EW1762EW1762	72.5	Citizen	Harford	49.2%	248 of 504	18 s	16.9 h
656	MNCPPC MaintCLTM2	72.1	Gauge	Prince Georges	32.4%	76 of 234	13 min	5.1 h
657	MD-140 at MD-526MD018	72.0	Road	Carroll	68.2%	344 of 504	21 min	2.3 h
658	Citizen station EW8292EW8292	71.9	Citizen	Howard	48.3%	325 of 672	17 s	10.6 h
659	LochleaLCHM2	71.9	Gauge	Baltimore City	40.3%	254 of 630	15 min	4.1 h
660	LisbonLSBM2	71.9	Gauge	Howard	30.8%	62 of 201	13 min	5.2 h
661	Citizen station DW3370DW3370	71.8	Citizen	Carroll	44.6%	100 of 224	21 s	8.2 h
662	AnnapolisNDBC-APAM2	71.5	Gauge	Anne Arundel	57.6%	323 of 560	44 min	6.3 h
662	Chesapeake CityNDBC-CHCM2	71.5	Gauge	Cecil	57.6%	323 of 560	44 min	6.3 h
664	BaltimoreNDBC-BLTM2	71.4	Gauge	Baltimore	57.5%	322 of 560	44 min	6.3 h
665	Bishops HeadNDBC-BISM2	71.3	Gauge	Dorchester	57.6%	323 of 560	44 min	6.3 h
666	Citizen station GW4076GW4076	70.9	Citizen	Frederick	55.2%	293 of 530	20 s	5.1 h
667	Tolchester BeachNDBC-TCBM2	70.7	Gauge	Kent	57.6%	323 of 560	44 min	6.3 h
668	Citizen station GW2838GW2838	70.7	Citizen	Prince George's	48.0%	121 of 252	16 s	38.4 h
669	Catonsville - Dead RunDEDM2	70.3	Gauge	Baltimore	47.3%	159 of 336	28 min	13 h
670	Baltimore - Ashburton WaterAWPM2	70.1	Gauge	Baltimore City	28.5%	115 of 403	13 min	3.6 h
671	Ellicott City RainELYM2	69.9	Gauge	Howard	27.3%	138 of 504	13 min	2.7 h
672	Dead Run AT WoodlawnWOLM2	69.4	Gauge	Baltimore	46.1%	155 of 336	28 min	15 h
673	Citizen station DW6747DW6747	69.4	Citizen	Howard	38.8%	78 of 201	16 s	36.3 h
674	Citizen station GW4905GW4905	69.3	Citizen	Carroll	38.1%	101 of 265	19 s	10.8 h
675	Piney PointNDBC-PPTM2	69.2	Gauge	Saint Mary's	57.5%	322 of 560	44 min	12 h
676	Dead Run AT WoodlawnWDNM2	68.6	Gauge	Baltimore	43.7%	147 of 336	28 min	15 h
677	Citizen station CW1706CW1706	68.4	Citizen	Talbot	40.4%	136 of 336	19 s	41.9 h
678	Dead Run AT WoodlawnTTDM2	68.3	Gauge	Baltimore	42.8%	144 of 336	28 min	15 h
679	Solomons IslandNDBC-SLIM2	68.0	Gauge	Calvert	57.6%	323 of 560	44 min	6.3 h
680	CambridgeNDBC-CAMM2	67.5	Gauge	Dorchester	57.6%	323 of 560	44 min	6.3 h
681	Citizen station DW8300DW8300	67.0	Citizen	Frederick	41.3%	149 of 360	20 s	23.9 h
682	IS 83 SB - South of Shawan RdMD085	64.8	Road	Baltimore	39.2%	198 of 504	25 min	2.8 days
683	Piney RunPRDM2	64.5	Gauge	Carroll	18.4%	93 of 504	13 min	5.7 h
684	I-97 at I-695MD028	64.4	Road	Anne Arundel	9.5%	48 of 504	25 min	53 min
684	US 50 E/B at MD 90MD089	64.4	Road	Worcester	9.5%	48 of 504	25 min	53 min
686	Citizen station GW3133GW3133	64.2	Citizen	Talbot	37.5%	84 of 224	18 s	2.2 days
687	Ocean City InletNDBC-OCIM2	64.1	Gauge	Worcester	57.6%	323 of 560	44 min	6.3 h
688	Citizen station FW9110FW9110	64.0	Citizen	Harford	21.7%	365 of 1,680	17 s	3.6 h
689	Citizen station FW6819FW6819	63.9	Citizen	Prince George's	22.8%	383 of 1,680	17 s	3.6 h
690	Citizen station GW6092GW6092	63.6	Citizen	Baltimore	22.5%	378 of 1,680	17 s	3.6 h
691	District HeightsDISM2	63.5	Gauge	Prince Georges	15.8%	80 of 504	13 min	5.7 h
692	Cove Point LNG PierNDBC-COVM2	63.3	Gauge	Calvert	57.6%	323 of 560	44 min	6.3 h
693	Indian Creek Branch 1 N Indian Creek 3/BeltsvilleICKM2	63.3	Gauge	Prince Georges	19.3%	78 of 403	13 min	11.6 h
694	Citizen station GW5670GW5670	63.2	Citizen	Carroll	20.8%	421 of 2,016	18 s	3.6 h
695	Citizen station FW6864FW6864	62.9	Citizen	Howard	20.4%	412 of 2,016	17 s	3.7 h
696	Citizen station FW7035FW7035	62.9	Citizen	Howard	20.3%	410 of 2,016	17 s	3.6 h
697	Citizen station GW5591GW5591	62.9	Citizen	Garrett	20.2%	409 of 2,016	18 s	3.6 h
698	Citizen station GW5747GW5747	62.9	Citizen	Montgomery	20.2%	408 of 2,016	17 s	3.6 h
699	Phillips AAF/AberdnAPG	62.8	Airport	Harford	23.2%	39 of 168	12 min	3.6 days
700	Citizen station FW8079FW8079	62.8	Citizen	Anne Arundel	20.2%	409 of 2,016	18 s	3.7 h
701	Citizen station GW2027GW2027	62.8	Citizen	Anne Arundel	20.0%	405 of 2,016	19 s	3.7 h
702	Citizen station FW7211FW7211	62.7	Citizen	Anne Arundel	20.2%	409 of 2,016	17 s	3.6 h
703	Citizen station FW9312FW9312	62.7	Citizen	Frederick	20.1%	406 of 2,016	17 s	3.6 h
704	Cedarmere - Alert GageCEDM2	62.5	Gauge	Baltimore	19.8%	111 of 560	13 min	11.2 h
705	Citizen station GW6984GW6984	62.4	Citizen	Baltimore	20.7%	419 of 2,016	17 s	3.5 h
706	Citizen station GW5836GW5836	62.3	Citizen	Anne Arundel	22.5%	378 of 1,680	16 s	3.6 h
707	Carroll County LandfillCCLM2	62.3	Gauge	Carroll	15.1%	102 of 672	13 min	6 h
708	Unnamed Tributary 1 N Lake Arbor HeadwaterLKAM2	62.2	Gauge	Prince Georges	16.6%	67 of 403	13 min	11.6 h
709	Camp DavidRSP	62.1	Airport	Frederick	56.5%	95 of 168	11 min	2.5 days
710	Northwest Branch Anacostia River AT Takoma Park - Riggs RdTKMM2	62.1	Gauge	Prince Georges	14.8%	100 of 672	13 min	6 h
711	Citizen station DW8795DW8795	62.0	Citizen	Harford	26.7%	45 of 168	19 s	4.3 days
712	Citizen station GW6292GW6292	61.9	Citizen	Montgomery	20.3%	410 of 2,016	17 s	3.7 h
713	Berwyn RoadBRWM2	61.9	Gauge	Prince Georges	16.8%	63 of 373	13 min	14.5 h
714	Depot Pond 1.5 SSE Depot Pond/Upper MarlboroDPNM2	61.8	Gauge	Prince Georges	17.2%	87 of 504	13 min	11.7 h
715	Citizen station GW0953GW0953	61.6	Citizen	Allegany	20.3%	411 of 2,016	17 s	3.6 h
716	Indian Creek 2INDM2	61.5	Gauge	Prince Georges	16.0%	81 of 504	13 min	11 h
717	Citizen station GW0884GW0884	61.2	Citizen	Baltimore	19.0%	383 of 2,016	17 s	4.8 h
718	Tributary Of Collington Branch AT BowieBWEM2	61.2	Gauge	Prince Georges	15.0%	76 of 504	13 min	11 h
719	Montpelier SchoolMTNM2	61.2	Gauge	Prince Georges	13.6%	55 of 403	13 min	11.6 h
720	Savage ParkSVGM2	61.1	Gauge	Howard	14.4%	66 of 458	13 min	11.5 h
721	Dead Run AT WoodlawnWDLM2	60.7	Gauge	Baltimore	29.1%	98 of 336	28 min	2.1 days
722	Citizen station GW1438GW1438	60.7	Citizen	Montgomery	20.6%	416 of 2,016	18 s	3.6 h
723	Citizen station FW7923FW7923	60.1	Citizen	Washington	20.5%	415 of 2,016	18 s	3.6 h
724	Wildercroft ParkNCRM2	60.1	Gauge	Prince Georges	12.5%	84 of 672	13 min	8.7 h
725	Citizen station GW2295GW2295	59.2	Citizen	Howard	22.2%	374 of 1,680	18 s	3.5 h
726	Citizen station CW1620CW1620	59.1	Citizen	Harford	13.9%	28 of 201	15 s	5.2 days
727	BeltsvilleBTLM2	58.9	Gauge	Prince Georges	14.2%	24 of 168	17 min	47 h
728	PG Sports CenterLARM2	58.6	Gauge	Prince Georges	10.1%	64 of 630	13 min	11.8 h
729	Citizen station GW4179GW4179	58.2	Citizen	Garrett	20.0%	405 of 2,016	17 s	3.7 h
730	Alpha Ridge LandfillARLM2	58.0	Gauge	Howard	11.0%	93 of 840	12 min	12 h
731	Citizen station GW7571GW7571	57.0	Citizen	Frederick	19.3%	391 of 2,016	17 s	7.2 h
732	Citizen station GW0472GW0472	56.9	Citizen	Frederick	20.3%	411 of 2,016	18 s	3.7 h
733	I-68 at SavageMD049	56.1	Road	Garrett	45.6%	230 of 504	22 min	36.7 h
734	Powder MillS2049	55.7	Soil	Prince Georges	100%	168 of 168	53 min	63 min
735	PRLM2PRLM2	55.4	DCP	-	5.3%	18 of 336	13 min	3.8 days
736	MechanicsvilleMECM2	50.5	Cooperative	St Marys	8.3%	14 of 168	4.3 h	23 h

How a station is ranked

The 247 Rank answers one question about a weather station: can its readings be relied on? A station has to deliver: its reports arrive when due, soon, without long silences. And its readings have to be right: close to a trusted station nearby, passing their checks, and in step with the weather the forecast and its neighbours confirm.

The 247 score

Storm Station's poller asks every network on its own schedule, around the clock, and keeps the time of every report it hears; the reference comparison and the forecast engine keep the rest. From the last seven days of that record each station is scored out of 100 on six parts, and its 247 score is their weighted mean:

Reports receivedweight 35The share of its scheduled reports received. A station that sends every 5 minutes is due 2,016 reports in a week; one that reports once a day is due 7. Each report is counted in a slot centred on the station's own report time, so a report a minute early or late is still on time, and the week ends an hour back, so a report still on its way is never counted missed.Full marks: 100% received. No marks: none received.
Arrivalweight 10The median time its reports took to arrive from the moment a reading was taken to the moment it reached Storm Station.Full marks: within 10 minutes, or a tenth of its schedule for a station that reports less often. No marks: an hour, or its whole schedule.
Continuityweight 10Its longest silence against its own schedule, so a daily gauge is not marked down for a day between reports.Full marks: a silence of 3 reports or less. No marks: 72 reports, falling evenly on a log scale between.
Accuracyweight 20How closely its temperature follows its reference station the nearest airport or climate reference station that reported within half an hour, up to 15 miles away, reading by reading; an airfield is compared with the nearest other airport, never its own report. A steady offset is taken out, and where both heights are known only the offset beyond 3 F that the height difference does not explain is counted.Full marks: within 1.5 F, allowing 0.1 F more for each mile to the reference. No marks: 6.5 F beyond that.
Instrument checksweight 15The share of its readings that pass a check. For an airfield, the check the forecast engine runs the next day: each reading against the stations around it, as weather services check their own. For any other station, a reading 20 F or more from its reference fails, unless the two stand 3,000 ft or more apart.Full marks: none failed. No marks: 5% failed.
Forecast checkweight 10How closely its temperature matched Storm Station's forecast for the same hours, checked the next day, for every airfield the forecast engine scores. A station whose readings stray far from a forecast its neighbours confirm is one to doubt.Full marks: within 2 F on average. No marks: 8 F.

A part is scored once the week holds 24 readings or comparisons for it. A part that cannot be measured where a station stands counts at the middle of its state's measured stations, so the station is neither lifted nor sunk by it. A part measured nowhere in the state is left out, and the others carry its weight.

From score to rank

Each state's stations are ranked by their score, to the tenth. At an equal score the longer record comes first: a station that sent 2,016 of 2,016 reports has shown more than one that sent 7 of 7. Then the faster arrival, then the shorter silence. Ties on all of them share a rank, as a race is scored: three stations tied for third are all third, and the next is sixth.

A station is ranked once its week holds enough reports to measure: 12, or 3 days for a gauge that reports once a day. The rank is made again every day, so a station that falls silent or starts to read wrong drops, and one that recovers climbs back. Every page shows the same ranking: a station's rank here, in its state's list and on its own page come from one run, and a new run reaches them together. Each station's page shows its score part by part, with the figures behind each.

The same figures as data

/api/ranks for a state and /api/rank for one station, its score in parts; the developer page has every field.