Every instrument close enough to be worth naming, how far away it is, how high it stands, and what kind of measurement it makes.
What the snow tracker reads here
Every instrument in this state
-in
Snow on the ground
Station charts
Mammoth Cave Report
Rank 492 of 692 in Kentucky, Oct 16. The 247 rank orders a state's stations by their 247 score out of 100: how reliably they report, how accurate their readings are against a reference station, how their readings pass their checks, and how they stand against the forecast.
Ranking Statistics
247 score92.0of 100
Kentucky median
96.4the median score of 692 stations
Scoring higher
491stations in Kentucky
Sharing its score
2ranks 492 to 493
Points deducted
8.07.0 arrival, 1.0 forecast check
Counted at the median
Forecast checknot measured at this station; Kentucky median 89.8
M21rank 493; behind on reports received 100% against 89.0%
Equal scores are ordered by the share of scheduled reports received, then the reports due in the week (the longer record first), then the median arrival, then the longest silence.
Reports receivedweight 35100.035.0 of 35 pointsKentucky median 99.4168 of 168 scheduled reports received in 7 days
Arrivalweight 1030.23.0 of 10 pointsKentucky median 91.6half its reports arrived within 45 min
Continuityweight 10100.010.0 of 10 pointsKentucky median 100.0longest silence 63 min, on a schedule of one report every 60 min
Accuracyweight 20100.020.0 of 20 pointsKentucky median 100.0its temperature against the airport station KGLW, 11.6 miles away, over 50 readings: typical difference 2.6 °F beyond a steady offset of +1.2 °F
Instrument checksweight 15100.015.0 of 15 pointsKentucky median 100.00 of 50 readings failed their check against its reference station
Forecast checkweight 10-9.0 of 10 points, at the medianKentucky median 89.8-
The score is the weighted mean of its six parts, from the last 7 days. How a station is ranked sets out each part.
How each part is scored
Reports received
Full marks for every scheduled report received, none for none, in proportion between
Arrival
Full marks for a median arrival within 10 min, none at 60 min
Continuity
Full marks for a longest silence of 3 reports or less (3 h), none for 72 (72 h)
Accuracy
Full marks within 2.7 °F of its reference, typically, none beyond 9.2 °F
Instrument checks
Full marks for no reading failed, none for 5 per cent or more
Forecast check
Full marks within 2 °F of the forecast on average, none at 8 °F
+0.3 °Fwarmer than the airport station KGLW, 12 miles away, on average over 99 readings; typical difference 2.6 °F
The reports received are counted from the network's own archive of this station's reports. Its 247 rank is counted from Storm Station's own record, which holds less than 7 days of it so far: 168 of 168 scheduled reports received, 100%.
Against its reference: each temperature this station reports is compared with the nearest airport or climate reference station that reported within half an hour, up to 15 miles away. The figure is its reading less the reference's, on average, as both were reported; the typical difference is the root mean square. The difference in height is shown where both heights are known.
Its schedule is one report every hour, 24 in 24 hours. Two reports in the same hour count as one received.
The ranking these charts were drawn from, as tables
Share of scheduled reports received
Stations
100%
247
90 to 99%
219
80 to 89%
52
70 to 79%
37
60 to 69%
14
50 to 59%
62
40 to 49%
35
30 to 39%
1
20 to 29%
12
10 to 19%
7
0 to 9%
6
Day
Rank
Stations ranked
Share received
Oct 16, 2026
492
692
100.0%
Oct 15, 2026
491
676
100.0%
Oct 14, 2026
483
672
99.4%
Oct 13, 2026
473
673
99.4%
Oct 12, 2026
431
669
98.8%
Oct 11, 2026
399
663
98.8%
Oct 10, 2026
458
674
94.6%
Oct 9, 2026
459
674
94.6%
Oct 8, 2026
470
690
94.6%
Oct 7, 2026
478
687
94.6%
Oct 6, 2026
469
608
94.6%
Oct 5, 2026
486
602
95.0%
Oct 4, 2026
483
528
94.1%
Oct 3, 2026
450
512
99.1%
Oct 2, 2026
450
512
99.1%
Oct 1, 2026
243
355
98.8%
Sep 30, 2026
267
355
98.4%
Sep 29, 2026
210
351
100.0%
Sep 28, 2026
215
343
100.0%
The readings these charts were drawn from, as a table
Hour
Temperature F
Dew point F
Relative humidity %
Wind mph
Wind direction °
Reports
Thu 15, 11 PM
76.3
57.4
52
-
-
1
Thu 15, 10 PM
77.9
57.2
49
1
203
1
Thu 15, 9 PM
76.1
60.2
58
2
220
1
Thu 15, 8 PM
76.1
60.7
59
1
218
1
Thu 15, 7 PM
75.6
63.8
67
1
228
1
Thu 15, 6 PM
77.2
67.0
71
0
228
1
Thu 15, 5 PM
80.2
64.0
58
0
213
1
Thu 15, 4 PM
83.1
64.7
54
1
185
1
Thu 15, 3 PM
84.6
63.9
50
1
204
1
Thu 15, 2 PM
85.5
66.4
53
2
245
1
Thu 15, 1 PM
81.9
67.6
62
2
236
1
Thu 15, 12 PM
79.7
71.0
75
2
229
1
Thu 15, 11 AM
76.6
73.7
91
2
201
1
Thu 15, 10 AM
75.0
73.1
94
2
199
1
Thu 15, 9 AM
73.8
72.9
97
2
226
1
Thu 15, 8 AM
72.7
72.1
98
2
216
1
Thu 15, 7 AM
72.5
71.9
98
1
214
1
Thu 15, 6 AM
72.7
72.1
98
1
208
1
Thu 15, 5 AM
72.3
71.7
98
0
207
1
Thu 15, 4 AM
71.6
71.0
98
0
272
1
Thu 15, 3 AM
71.8
71.2
98
0
-
1
Thu 15, 2 AM
71.6
71.0
98
0
-
1
Thu 15, 1 AM
72.0
71.4
98
0
-
1
The readings these charts were drawn from, as a table
Hour
Temperature F
Dew point F
Relative humidity %
Wind mph
Wind direction °
Reports
Thu 15, 11 PM
76.3
57.4
52
-
-
1
Thu 15, 10 PM
77.9
57.2
49
1
203
1
Thu 15, 9 PM
76.1
60.2
58
2
220
1
Thu 15, 8 PM
76.1
60.7
59
1
218
1
Thu 15, 7 PM
75.6
63.8
67
1
228
1
Thu 15, 6 PM
77.2
67.0
71
0
228
1
Thu 15, 5 PM
80.2
64.0
58
0
213
1
Thu 15, 4 PM
83.1
64.7
54
1
185
1
Thu 15, 3 PM
84.6
63.9
50
1
204
1
Thu 15, 2 PM
85.5
66.4
53
2
245
1
Thu 15, 1 PM
81.9
67.6
62
2
236
1
Thu 15, 12 PM
79.7
71.0
75
2
229
1
Thu 15, 11 AM
76.6
73.7
91
2
201
1
Thu 15, 10 AM
75.0
73.1
94
2
199
1
Thu 15, 9 AM
73.8
72.9
97
2
226
1
Thu 15, 8 AM
72.7
72.1
98
2
216
1
Thu 15, 7 AM
72.5
71.9
98
1
214
1
Thu 15, 6 AM
72.7
72.1
98
1
208
1
Thu 15, 5 AM
72.3
71.7
98
0
207
1
Thu 15, 4 AM
71.6
71.0
98
0
272
1
Thu 15, 3 AM
71.8
71.2
98
0
-
1
Thu 15, 2 AM
71.6
71.0
98
0
-
1
Thu 15, 1 AM
72.0
71.4
98
0
-
1
Thu 15, 12 AM
73.4
72.8
98
0
242
1
Wed 14, 11 PM
74.5
73.9
98
0
244
1
Wed 14, 10 PM
75.0
74.4
98
0
-
1
Wed 14, 9 PM
75.7
75.1
98
0
-
1
Wed 14, 8 PM
75.9
74.9
97
0
306
1
Wed 14, 7 PM
78.6
72.2
81
0
309
1
Wed 14, 6 PM
79.9
73.9
82
0
52
1
Wed 14, 5 PM
84.7
72.0
66
0
75
1
Wed 14, 4 PM
84.6
72.4
67
0
284
1
Wed 14, 3 PM
86.7
71.6
61
1
243
1
Wed 14, 2 PM
85.5
71.4
63
3
234
1
Wed 14, 1 PM
86.7
71.1
60
2
238
1
Wed 14, 12 PM
88.2
71.0
57
2
248
1
Wed 14, 11 AM
86.2
69.1
57
3
237
1
Wed 14, 10 AM
81.0
67.6
64
2
232
1
Wed 14, 9 AM
76.3
64.5
67
2
229
1
Wed 14, 8 AM
72.0
64.4
77
3
216
1
Wed 14, 7 AM
71.4
64.9
80
2
209
1
Wed 14, 6 AM
71.2
65.0
81
2
211
1
Wed 14, 5 AM
71.4
65.2
81
2
214
1
Wed 14, 4 AM
71.4
64.9
80
1
217
1
Wed 14, 3 AM
72.7
65.0
77
1
227
1
Wed 14, 2 AM
72.7
64.7
76
1
236
1
Wed 14, 1 AM
73.2
64.4
74
1
227
1
Wed 14, 12 AM
74.5
64.0
70
1
214
1
Tue 13, 11 PM
74.1
63.3
69
1
228
1
Tue 13, 10 PM
75.2
63.5
67
0
240
1
Tue 13, 9 PM
77.0
62.5
61
1
224
1
Tue 13, 8 PM
77.7
60.2
55
1
230
1
Tue 13, 7 PM
78.4
58.2
50
1
233
1
Tue 13, 6 PM
81.9
57.8
44
1
234
1
Tue 13, 5 PM
86.2
59.0
40
2
199
1
Tue 13, 4 PM
89.8
56.0
32
3
218
1
Tue 13, 3 PM
90.1
56.2
32
2
234
1
Tue 13, 2 PM
91.4
57.4
32
3
230
1
Tue 13, 1 PM
88.0
56.9
35
3
244
1
Tue 13, 12 PM
86.4
57.8
38
2
235
1
Tue 13, 11 AM
82.0
57.3
43
2
246
1
Tue 13, 10 AM
76.3
57.4
52
3
248
1
Tue 13, 9 AM
71.6
57.4
61
4
226
1
Tue 13, 8 AM
67.5
57.8
71
3
227
1
Tue 13, 7 AM
66.2
57.7
74
2
217
1
Tue 13, 6 AM
66.9
57.9
73
3
218
1
Tue 13, 5 AM
67.3
57.9
72
2
217
1
Tue 13, 4 AM
67.6
57.5
70
1
233
1
Tue 13, 3 AM
68.9
57.5
67
2
230
1
Tue 13, 2 AM
68.9
57.1
66
2
229
1
Tue 13, 1 AM
69.1
56.8
65
1
259
1
Tue 13, 12 AM
67.6
57.1
69
1
246
1
Mon 12, 11 PM
64.9
57.9
78
0
246
1
Mon 12, 10 PM
66.4
58.6
76
0
248
1
Mon 12, 9 PM
72.0
57.8
61
0
-
1
Mon 12, 8 PM
74.1
59.8
61
1
249
1
Mon 12, 7 PM
73.6
59.8
62
1
246
1
Mon 12, 6 PM
78.1
58.5
51
1
261
1
Mon 12, 5 PM
83.3
56.4
40
1
208
1
Mon 12, 4 PM
87.1
58.4
38
2
202
1
Mon 12, 3 PM
86.9
61.7
43
2
242
1
Mon 12, 2 PM
86.0
64.0
48
2
234
1
Mon 12, 1 PM
82.0
62.6
52
2
248
1
Mon 12, 12 PM
77.4
65.1
66
2
210
1
Mon 12, 11 AM
71.6
61.7
71
2
207
1
Mon 12, 10 AM
65.5
60.5
84
1
206
1
Mon 12, 9 AM
60.8
60.5
99
0
193
1
Mon 12, 8 AM
53.2
52.9
99
0
-
1
Mon 12, 7 AM
51.1
50.8
99
0
-
1
Mon 12, 6 AM
51.6
51.3
99
0
-
1
Mon 12, 5 AM
52.2
51.6
98
0
49
1
Mon 12, 4 AM
53.1
52.8
99
0
86
1
Mon 12, 3 AM
54.0
53.7
99
0
-
1
Mon 12, 2 AM
54.7
54.1
98
0
-
1
Mon 12, 1 AM
54.3
53.7
98
0
133
1
Mon 12, 12 AM
54.9
54.3
98
0
-
1
Sun 11, 11 PM
55.4
54.8
98
0
-
1
Sun 11, 10 PM
56.1
55.5
98
0
-
1
Sun 11, 9 PM
57.0
56.4
98
0
140
1
Sun 11, 8 PM
58.5
57.9
98
0
-
1
Sun 11, 7 PM
60.4
59.5
97
0
288
1
Sun 11, 6 PM
62.8
60.7
93
0
206
1
Sun 11, 5 PM
64.2
60.9
89
0
245
1
Sun 11, 4 PM
63.5
60.2
89
0
289
1
Sun 11, 3 PM
62.6
60.2
92
1
298
1
Sun 11, 2 PM
62.1
60.3
94
1
293
1
Sun 11, 1 PM
61.7
60.5
96
1
298
1
Sun 11, 12 PM
61.0
59.5
95
1
301
1
Sun 11, 11 AM
61.2
60.6
98
1
298
1
Sun 11, 10 AM
60.1
59.5
98
1
301
1
Sun 11, 9 AM
59.7
59.1
98
1
304
1
Sun 11, 8 AM
59.0
58.4
98
1
301
1
Sun 11, 7 AM
58.3
57.7
98
0
-
1
Sun 11, 6 AM
58.5
57.9
98
0
-
1
Sun 11, 5 AM
58.3
57.7
98
0
-
1
Sun 11, 4 AM
58.1
57.5
98
1
67
1
Sun 11, 3 AM
58.1
57.5
98
1
102
1
Sun 11, 2 AM
58.1
57.5
98
1
64
1
Sun 11, 1 AM
57.9
57.3
98
2
58
1
Sun 11, 12 AM
58.1
57.5
98
2
74
1
Sat 10, 11 PM
58.3
57.4
97
2
83
1
Sat 10, 10 PM
58.6
57.4
96
2
70
1
Sat 10, 9 PM
59.4
58.0
95
3
66
1
Sat 10, 8 PM
60.4
59.2
96
3
75
1
Sat 10, 7 PM
61.2
60.0
96
3
66
1
Sat 10, 6 PM
61.3
60.1
96
4
62
1
Sat 10, 5 PM
61.7
60.5
96
3
68
1
Sat 10, 4 PM
61.3
59.8
95
4
67
1
Sat 10, 3 PM
61.7
60.2
95
4
69
1
Sat 10, 2 PM
62.6
59.6
90
4
64
1
Sat 10, 1 PM
63.5
59.9
88
4
68
1
Sat 10, 12 PM
63.3
61.2
93
3
89
1
Sat 10, 11 AM
60.1
57.4
91
2
89
1
Sat 10, 10 AM
59.5
53.3
80
1
66
1
Sat 10, 9 AM
59.7
52.5
77
1
108
1
Sat 10, 8 AM
59.5
52.3
77
0
171
1
Sat 10, 7 AM
59.9
51.9
75
0
38
1
Sat 10, 6 AM
60.4
49.8
68
0
-
1
Sat 10, 5 AM
58.3
49.7
73
1
64
1
Sat 10, 4 AM
59.5
48.5
67
0
51
1
Sat 10, 3 AM
58.1
50.6
76
0
-
1
Sat 10, 2 AM
59.4
49.2
69
0
-
1
Sat 10, 1 AM
60.6
50.0
68
0
300
1
Sat 10, 12 AM
61.2
48.5
63
0
306
1
Fri 9, 11 PM
64.2
48.6
57
0
338
1
Fri 9, 10 PM
63.7
47.7
56
0
23
1
Fri 9, 9 PM
64.2
46.2
52
0
24
1
Fri 9, 8 PM
66.0
45.7
48
0
-
1
Fri 9, 7 PM
68.7
45.9
44
0
-
1
Fri 9, 6 PM
74.3
45.6
36
0
-
1
Fri 9, 5 PM
79.7
44.6
29
1
64
1
Fri 9, 4 PM
81.9
44.6
27
2
108
1
Fri 9, 3 PM
82.8
44.4
26
2
114
1
Fri 9, 2 PM
85.5
46.7
26
2
116
1
Fri 9, 1 PM
81.3
41.0
24
2
120
1
Fri 9, 12 PM
80.2
45.0
29
2
115
1
Fri 9, 11 AM
79.2
46.8
32
2
122
1
Fri 9, 10 AM
71.2
47.6
43
1
105
1
Fri 9, 9 AM
59.4
48.8
68
1
66
1
Fri 9, 8 AM
50.0
48.0
93
0
36
1
Fri 9, 7 AM
47.3
45.7
94
0
-
1
Fri 9, 6 AM
47.3
44.5
90
0
-
1
Fri 9, 5 AM
48.9
45.8
89
0
-
1
Fri 9, 4 AM
48.4
46.2
92
0
-
1
Fri 9, 3 AM
49.3
45.9
88
0
-
1
Fri 9, 2 AM
50.0
46.0
86
0
-
1
Fri 9, 1 AM
51.6
47.2
85
0
-
1
The readings these charts were drawn from, as a table
Day
High F
Low F
Highest dew point F
Lowest dew point F
Highest humidity %
Lowest humidity %
Strongest gust mph
Oct 15
85.5
71.6
73.7
57.2
98
49
8
Oct 14
88.2
71.2
75.1
64.0
98
57
11
Oct 13
91.4
66.2
63.5
56.0
74
32
17
Oct 12
87.1
51.1
65.1
50.8
99
38
9
Oct 11
64.2
55.4
60.9
54.8
98
89
7
Oct 10
63.5
58.1
61.2
48.5
97
63
15
Oct 9
85.5
47.3
48.8
41.0
94
24
6
Oct 8
85.6
51.4
54.3
35.7
92
18
10
Oct 7
84.9
45.5
56.3
44.4
96
28
12
Oct 6
79.2
45.0
48.0
37.5
92
23
10
Oct 5
76.6
46.9
51.8
34.5
98
23
13
Oct 4
79.0
55.4
59.9
53.4
98
47
11
Oct 3
72.5
58.8
61.3
55.5
97
66
11
Oct 2
74.8
63.9
71.4
62.7
98
66
11
Oct 1
90.3
65.5
62.9
54.0
74
38
12
Sep 30
89.6
52.7
54.3
44.1
94
21
10
Sep 29
84.2
46.8
55.4
46.0
97
31
7
Sep 28
79.7
46.0
50.1
45.2
97
31
10
Sep 27
78.1
43.3
49.2
39.1
97
25
11
Sep 26
79.9
51.8
51.2
36.5
88
21
12
Sep 25
78.4
52.7
58.6
48.0
97
38
11
Sep 24
72.9
58.3
64.7
57.2
98
67
12
Sep 23
69.1
61.5
64.0
60.3
98
77
7
Sep 22
69.3
62.2
65.4
59.1
93
75
9
Sep 21
92.3
70.0
70.9
64.4
86
48
11
Sep 20
96.8
71.6
69.5
62.8
81
36
11
Sep 19
97.9
69.1
72.6
61.2
95
32
8
Sep 18
96.3
69.6
71.8
67.2
95
39
11
Sep 17
96.3
71.6
73.9
67.3
94
42
8
Station report
Mammoth Cave, in 4 sheets
Drawn from its report of Oct 15, 2026, 11:00 PM local time, in the manner of the Field Book, and opened beside the plates that explain each part of it.
76.3 F with a dew point of 57.4 F, 52 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 4,400 ft up.
At 800 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.07 inHg and the temperature at 56.1 F; it reports 76.3 F, 20.2 F warmer than standard.
On Oct 16 the noon sun stands 44 degrees above the horizon at 37.19 N, and the day is 11 h 04 min long. Level ground there takes 69 per cent of the noon sunlight a surface facing the sun would.
FB-WAT-002, Fig. CHumidity variables
FB-ENG-011, Fig. AWater vapour as a gas
FB-ENG-005, Fig. ALapse rates and stability
