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Small Craft Advisory SMALL CRAFT ADVISORY - Tidal Potomac
Test Message TEST MESSAGE - Montgomery Cnty(C+SE), MD  - Montgomery Cnty(NW), MD

WASHINGTON DC METRO AREA FORECAST DISCUSSION
UPDATED National Weather Service Baltimore MD/Washington DC 1017 AM EDT Mon Jul 20 2026 .WHAT HAS CHANGED... Increased sky cover and raised MaxT slightly. Otherwise, no changes.

Current DC Area Radar & North America Lightning


Northeast US Radar

Regional Radar

North America Lightning

North America Lightning Strikes
Radar image courtesy of NWS. Lightning Data courtesy of Blitzortung.org and its Contributors.
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Current Clifton Virginia Conditions & NWS Forecast

Updated: @ 20-Jul-2026 3:10pm - next update at 3:20pm  
Temperature Summary Outlook
Currently: 85.0, Max: 86.7, Min: 64.7 85.0°F
Warmer 0.7°F than last hour.

Warm

Feels like: 92°F

24-hr difference
-2.5°FColder 2.5°F than yesterday at this time.
  Today Yesterday
High: 86.7°F
2:11pm 		87.8°F
1:41pm
Low: 64.7°F
5:07am 		70.8°F
11:59pm
High & Low July 2026
High:  101.6°F
04 July at 3:01 PM
Low:  63.4°F
13 July at 6:33 AM
Max Min:  77.9°F
16 July
Min Max:  83.1°F
07 July
High and Low 2026
High:  101.6°F
04 July at 3:01 PM
Low:  5.2°F
27 January at 7:52 AM
Max Min:  77.9°F
16 July
Min Max:  18.4°F
25 January
Record July
High:  101.6°F
at 15:01 on 04 July 2026
Low:  51.6°F
at 05:40 on 30 July 2014
Max Min:  77.9°F
at 06:42 on 07 July 2024
Min Max:  72.0°F
at 22:57 on 04 July 2016
Station All Time Record
High:  101.9°F
at 15:51 on 02 August 2024
Low:  1.0°F
at 07:23 on 23 January 2014
Max Min:  78.1°F
at 06:58 on 23 June 2024
Min Max:  16.7°F
at 12:04 on 16 February 2015
Records began on 24 December 2012
Wind Chill
Now:  85.0°F
Coldest Wind Chill
Today:  64.7°F
at 5:07am
Yesterday:  70.8°F
at 11:59pm
July 2026  63.4°F
13 July at 6:33 AM
2026  2.9°F
01 February at 8:34 AM
Station July  51.6°F
at 05:40 on 30 July 2014
Station All Time  °F
Records began on 24 December 2012
Degree Days
Heating Degree Days
Today: 0.0 Degree Days
Yesterday: 0.0 Degree Days
Cooling Degree Days
Today: 5.4 Degree Days
Yesterday: 14.4 Degree Days
Heat Index
Now:  89.9°F
Warmest Heat Index
Today:  91.5°F
at 14:10
Yesterday:  97.1°F
at 13:38
July 2026  128.9°F
04 July at 3:04 PM
2026  128.9°F
04 July at 3:04 PM
Station Record July  128.9°F
at 15:04 on 04 July 2026
Station All Time  128.9°F
at 15:04 on 04 July 2026
Records began on 24 December 2012
WeatherCam Thumbnail
North North West Camera
North North West WeatherCam
Mostly cloudy Mostly cloudy
Wind from ESE ESE
2
Gust:
 7 mph
1 Bft - Light air
Today: 10 mph 1:48pm
Gust Month: 19 mph July 18
Rain Today:  0.00 in
Rain Rate /hr  0.00 in
Rain Last Hour:  0.00 in
Rain 24hrs:  0.00 in
Wind

Station High July 2026
High Gust:  19 mph
18 July at 3:13 PM
High Average:  5 mph
18 July at 3:20 PM
Station High 2026
High Gust:  29 mph
07 February at 10:28 AM
High Average:  10 mph
12 March at 11:03 AM
Station Record July
High Gust:  28 mph
at 16:56 on 17 July 2019
High Average:  12 mph
at 16:11 on 18 July 2016
Station All Time Record
High Gust:  42 mph
at 12:56 on 04 January 2018
High Average:  24 mph
at 13:07 on 02 March 2018
Records began on 24 December 2012
Wind Run

Today:  6.3 miles
Yesterday:  19.8 miles
Highest Wind Run
July 2026  21.4 miles
04 July
2026  101.4 miles
07 February
July  96.9 miles
on 29 July 2017
Station All Time  284.2 miles
on 02 March 2018
Records began on 24 December 2012

Rain
Rain Today: 0.00 in
Rain Rate (/hr): 0.00 in
Rain Yesterday: 0.00 in
This Month: 2.76 in
Season Total: 14.21 in
2 days since last rain.

Days Since Last Dry Day: 0
Station High July 2026
High Day:  0.68 in
09 July
High Hour:  0.67 in
10 July at 6:32 PM
High Rain Rate /hr:  5.38 in
10 July at 6:12 PM
Station High 2026
High Day:  1.35 in
16 March
High Hour:  0.78 in
16 March at 1:42 PM
High Rain Rate /hr:  5.76 in
16 March at 12:46 PM
Station Record July
High Day:  5.17 in
on 21 July 2018
High Hour:  2.21 in
at 16:13 on 22 July 2020
High Rain Rate /hr:  12.80 in
at 15:26 on 22 July 2020
Station All Time Record
High Day:  5.17 in
on 21 July 2018
High Hour:  2.21 in
at 16:13 on 22 July 2020
High Rain Rate /hr:  64.00 in
at 10:49 on 19 October 2021
High Month:  10.27 in
July 2018
Records began on 24 December 2012
WeatherCam Thumbnail
South South West Camera
South South West WeatherCam
Today

Today: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms
Tuesday

Tuesday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Hi 86 °F Lo 69 °F Hi 88 °F
Lightning VA MD DC WV DE

Viginia Lighting
Radar Washington DC Metro Area

  GRLevel3 radar from NWS station KLWX

Storm Prediction Center Activity Chart

SPC Activity

Humidity & Barometer
Humidity: 62 % Increased 8.0% since last hour.
Dew Point: 70.5°F Increased 2.5°F since last hour.
Barometer: 29.97 inHg Falling 0.01 inHg/hr
Baro Trend: Falling slowly
Today
Pressure High:  30.09 in
Pressure Low:  29.99 in
Dewpoint High:  33.1 °F
Dewpoint Low:  19.6 °F
Humidity High:  80%
Humidity Low:  40%
Station Record
Pressure High:  31.41 in
at 12:14 on 23 March 2017
Pressure Low:  28.99 in
at 07:41 on 07 February 2020
Dewpoint High:  82.7 °F
at 11:55 on 05 July 2024
Dewpoint Low:  -27.0 °F
at 01:57 on 20 February 2015
Records began on 24 December 2012
Snow

Snow Depth: 0.0 in
Snowfall Today: No Snow Today
Storm Total: 0.0 in
Total Season Snow: 13.0 in
Total Last Season: 15.5 in
Fire Danger
firedanger
Almanac
Sunrise: 5:59am
Sunset: 8:32pm
Moonrise: 12:58pm
Moonset: 11:54pm

Day Length:  14:29
Dawn:  05:30
Dusk:  21:02
Daylight Length:  15:31
 There will be 1min 29s less daylight tomorrow

Cloud Base

cloudbase
CB AGL: 3291 ft
UV Index

   5.4   
 Medium 
High: 7.1 @ 1:34pm

Solar Radiation
884 W/m2
High: 1111 @  1:10pm

Air Quality Index
Current AQI
84
Moderate

Sunlight

14 hrs 33 min 9 sec
of Sunlight Today
Which is
1 min 29 sec Shorter
Than Yesterday
(Noon) graph (Midnight)
 Legend

Moon


Waxing Crescent
Waxing Crescent, Moon at 7 days in cycle
44% %
Illuminated
 NWS Weather Forecast  - Outlook: Today & Tonight
Today

Today: Mostly Sunny
Mostly Sunny

Hi 86 °F		 NWS forecast: Mostly sunny, with a high near 86. Southeast wind 3 to 7 mph.
Davis VP+ forecast: Increasing clouds with little temperature change.		   Tonight

Tonight: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms

Lo 69 °F		 NWS forecast: A chance of showers and thunderstorms between 1am and 5am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
 NWS Weather Forecast  - Five Day Outlook for Today through Friday - Last Update: Mon, 20-Jul-2026 10:53am EDT
Today

Today: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms
Tuesday

Tuesday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Showers And Thunderstorms Likely then Showers And Thunderstorms
Showers And T-Storms Likely then Showers And T-Storms
Wednesday

Wednesday: Rain Showers Likely then Chance Showers And Thunderstorms
Rain Showers Likely then Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Hi 86 °F Lo 69 °F Hi 88 °F Lo 70 °F Hi 86 °F Lo 63 °F Hi 81 °F Lo 62 °F Hi 82 °F

NWS Forecast Maps

NOAA Forecast Map for Today

Forecast Map for Today

NOAA Forecast Map for Tomorrow

Forecast Map for Tomorrow
Forecast map for Today courtesy of NOAA. Forecast map for Tomorrow courtesy of NOAA.

Random Weather Facts

Pollen
Each year American vegetation spews forth some 1,000,000 tons of pollen into the air we breathe.

Today in Weather History

Weather History for July 20
 
1984   Thunderstorms dropped 6 to 13 inches of rain at Tulsa, OK in 6 hours. The flooding claimed 14 lives and caused $90 million in property damage. 4600 cars, 743 houses, and 387 apartments were destroyed or severely damaged in the flood.
1967   A slow moving nor'easter battered New England with high winds, heavy rain, and record late season snow. Winds 70 to 90 mph in gusts occurred along the coast. Over 7 inches of rain fell at Nantucket, MS with 6.57 inches falling in 24 hours to set a new 24 hour rainfall record. 24.9 inches of snow fell at Mount Washington, NH to set a new May snowfall record.