Storm Station
Sign in

Baltimore/Washington International Thurgood Marshall Airport, Maryland

Large airport in Anne Arundel County, Maryland

Air quality

The air at Baltimore/Washington International Thurgood Marshall Airport

Index 34, good, led by fine particles. Read at 12 PM from its reporting area, Metro Baltimore (MD), 4 miles off.

34Good
  • Fine particles (PM2.5)34Good19.6 mi
  • Ozone12Good9 ppb13.8 mi
  • Nitrogen dioxide8Good9.6 ppb13.9 mi
  • Sulfur dioxide0Good0.3 ppb13.8 mi
  • Carbon monoxide-0.3 ppm9.8 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 20, good.

Smoke, the next 45 hours

Little smoke near the ground through Sun 8 AM: the index from smoke stays at 6 or under.

FriSatSun

Precipitation

What has fallen at Baltimore/Washington International Thurgood Marshall Airport

0.04 in in the last 24 hours, 0.07 in over the last 3 days, to Fri 11 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.04in
Last 3 days
0.07in

Visibility

How far you can see at Baltimore/Washington International Thurgood Marshall Airport, the next 45 hours

Mist or haze: visibility falls to 3 miles Sat 4 AM.

FriSatSun

Airfield

Code
BWI
ICAO
KBWI
IATA
BWI
Field elevation
146 ft
Serves
Baltimore
Kind
Large airport
Scheduled service
Yes
Its own instrument
BWI
Wind now
From 220° at 8 mph, read 16 Oct, 11:54

Runways

RunwayLengthWidthSurfaceHeading, trueWind along it nowCrosswind now
10 / 2810,503 ft150 ftAsphalt94° / 274°5 mph head, on 286 mph from the left
15L / 33R5,000 ft100 ftAsphalt145° / 325°2 mph head, on 15L8 mph from the right
15R / 33L9,501 ft150 ftAsphalt144° / 324°2 mph head, on 15R8 mph from the right
102815L33R15R33L5,000 ftN220° 8 mph
Runways from their surveyed ends, north up, lengths and positions to scale; the rose in the corner is the wind now.

Measured here

What the airfield's own instrument measured, the last 24 hours

Every hour from Baltimore - Wash Intl (BWI), Baltimore/Washington International Thurgood Marshall Airport's own instrument, measure by measure, on the field's own clock.

Temperature

67 F at 11 AM; 67 F at its warmest, 11 AM, and 60 F at its coolest, 12 AM.

Now
67F
11 AM
Highest
67F
11 AM
Lowest
60F
12 AM
Temperature and Dew point at Baltimore - Wash Intl, temperature from 60.0 to 66.5, the latest 66.5; dew point from 51.0 to 64.0, the latest 64.0, in degrees Fahrenheit.TEMPERATURE AND DEW POINTF50556065703 PM6 PM9 PMOct 163 AM6 AM9 AM12 PMTEMPERATUREDEW POINT

How it is measured: Stevenson screen and siting, Field Book FB-INS-009

Humidity and dew point

A dew point of 64 F, the air 92% saturated; the humidity ran from 65% at 1 PM Thursday to 100% at 7 AM.

Dew point now
64F
11 AM
Humidity now
92%
Humidity, range
65 to 100%
Relative humidity at Baltimore - Wash Intl, relative humidity from 65 to 100, the latest 92, in per cent.RELATIVE HUMIDITY%607080901003 PM6 PM9 PMOct 163 AM6 AM9 AM12 PM

How it is measured: Humidity variables, Field Book FB-WAT-002

Wind

9 mph from the southwest at 12 PM; at its strongest 9 mph, 12 PM, and no gust reported.

Now
9mph
from the southwest
Strongest
9mph
12 PM
Highest gust
-
none reported
Wind at Baltimore - Wash Intl, wind from 0 to 9, the latest 9, in miles an hour.WINDmph02.557.5103 PM6 PM9 PMOct 163 AM6 AM9 AM12 PM
Wind direction at Baltimore - Wash Intl, wind direction from 70 to 220, the latest 220, in degrees.WIND DIRECTION°0901802703603 PM6 PM9 PMOct 163 AM6 AM9 AM12 PM

How it is measured: Coriolis as geometry, Field Book FB-ENG-008

Pressure

29.83 inHg at 12 PM, falling 0.06 inHg over 3 hours; 0.35 inHg lower than a day before.

Now
29.83inHg
12 PM
3 hours
-0.06inHg
falling
24 hours
-0.35inHg
Pressure, altimeter at Baltimore - Wash Intl, pressure, altimeter from 29.83 to 30.18, the latest 29.83, in inches of mercury.PRESSURE, ALTIMETERinHg29.8029.9030.0030.1030.203 PM6 PM9 PMOct 163 AM6 AM9 AM12 PM

How it is measured: Hydrostatic balance, Field Book FB-ENG-003

Visibility

Down to 1 mile at 7 AM; 10 miles or more now.

Now
10+mi
Lowest
1mi
7 AM
Hours under a mile
0
Visibility at Baltimore - Wash Intl, visibility from 1.0 to 10.0, the latest 10.0, in miles.VISIBILITYmi02.557.5103 PM6 PM9 PMOct 163 AM6 AM9 AM12 PMLIFRIFRMVFRVFR

How it is measured: Fog types, Field Book FB-WAT-020

Cloud base

The lowest cloud base came down to 200 ft at 7 AM; a base was reported in 24 of the hours.

Lowest base now
600ft
Lowest in 24 hours
200ft
7 AM
Hours with a base reported
24
Lowest cloud base at Baltimore - Wash Intl, lowest cloud base from 200 to 5,500, the latest 600, in feet.LOWEST CLOUD BASEft02,0004,0006,0003 PM6 PM9 PMOct 163 AM6 AM9 AM12 PMMVFRVFR

How it is measured: Cloud classification, Field Book FB-SKY-001

Precipitation

0.04 in measured in the gauge, the most, 0.02 in, in the hour to 12 AM.

Last 24 hours
0.04in
Wettest hour
0.02in
12 AM
Hours with some
5
Precipitation at Baltimore - Wash Intl, precipitation from 0.00 to 0.02, the latest 0.00, in inches.PRECIPITATIONin0.000.030.050.070.103 PM6 PM9 PMOct 163 AM6 AM9 AM12 PM

How it is measured: ASOS, Field Book FB-INS-002

Baltimore - Wash Intl: every reading, the last 7 days, 30 days and the year, and how well it reports

What is measuring near here

The 6 instruments nearest Baltimore/Washington International Thurgood Marshall Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.9 miles away.

measured now4 instruments

Baltimore - Wash IntlBWI

At an airfield/0.9 mi away/138 ft/8 ft below here

temp, wind, gust, visibility, precip, pressure

I-97 at MD-100MD027

Beside a road/1.6 mi away/72 ft/74 ft below here

temp, pavement temp, wind, visibility, precip

Powder MillS2049

At a soil climate station/14.7 mi away/105 ft/41 ft below here

temp, humidity, soil temp, soil moisture

measured daily2 instruments

Ferndale - BWI SnowBSPM2

At a cooperative observer's station/0.8 mi away/118 ft/28 ft below here

snowfall, snow depth, precip, high, low

Linthicum 0.3 SSEMD-AA-61

In a volunteer observer's own ground/1.8 mi away/174 ft/28 ft above here

precip, snowfall, snow depth

-

Snow on the ground

Elsewhere in Maryland

21 places, each with its own forecast and its own instruments.

Near Baltimore/Washington International Thurgood Marshall Airport

The nearest places, each with its own forecast and the instruments nearest it.

Airports near Baltimore/Washington International Thurgood Marshall Airport

Every airport in the state

Near Baltimore/Washington International Thurgood Marshall Airport