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 Details for Tidal Potomac Small Craft Advisory
 Tidal Potomac
 Details for Tidal Potomac Small Craft Advisory
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 Details for Montgomery Cnty(C+SE), MD Test Message
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 Details for Montgomery Cnty(NW), MD Test Message

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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
Small Craft Advisories were issued across the tidal Potomac as well as the Chesapeake Bay (including adjoining tributaries) on Saturday into Saturday night. Otherwise, the signal of active weather persists on Sunday into next week as a slow moving closed low approaches from the west.

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: @ 31-Jul-2026 4:10pm - next update at 4:20pm  
Temperature Summary Outlook
Currently: 88.5, Max: 89.6, Min: 67.4 88.5°F
Warmer 1.5°F than last hour.

Warm

Feels like: 94°F

24-hr difference
5.7°FWarmer 5.7°F than yesterday at this time.
  Today Yesterday
High: 89.6°F
3:54pm 		84.4°F
3:13pm
Low: 67.4°F
6:44am 		66.0°F
4:56am
High & Low July 2026
High:  101.6°F
04 July at 3:01 PM
Low:  59.2°F
24 July at 6:32 AM
Max Min:  77.9°F
16 July
Min Max:  81.9°F
25 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:  88.5°F
Coldest Wind Chill
Today:  67.4°F
at 6:44am
Yesterday:  66.0°F
at 4:56am
July 2026  59.2°F
24 July at 6:32 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: 7.9 Degree Days
Yesterday: 11.5 Degree Days
Heat Index
Now:  91.5°F
Warmest Heat Index
Today:  94.8°F
at 15:33
Yesterday:  87.2°F
at 15:20
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
Few Clouds Few Clouds
Wind from NE NE
2
Gust:
 4 mph
1 Bft - Light air
Today: 9 mph 3:58pm
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:  5.4 miles
Yesterday:  28.9 miles
Highest Wind Run
July 2026  28.9 miles
30 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: 3.60 in
Season Total: 15.05 in
6 days since last rain.

Days Since Last Dry Day: 0
Station High July 2026
High Day:  0.80 in
21 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
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Saturday

Saturday: Partly Sunny
Partly Sunny
Hi 87 °F Lo 67 °F Hi 90 °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: 49 % Decreased 4.0% since last hour.
Dew Point: 66.9°F Decreased 1.8°F since last hour.
Barometer: 29.96 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: 6:08am
Sunset: 8:23pm
Moonset: 8:03am
Moonrise: 9:33pm

Day Length:  14:11
Dawn:  05:41
Dusk:  20:51
Daylight Length:  15:10
 There will be 1min 52s less daylight tomorrow

Cloud Base

cloudbase
CB AGL: 4908 ft
UV Index

   4.1   
 Medium 
High: 7.6 @ 1:02pm

Solar Radiation
733 W/m2
High: 1174 @  1:02pm

Air Quality Index
Current AQI
35
Good

Sunlight

14 hrs 14 min 30 sec
of Sunlight Today
Which is
1 min 52 sec Shorter
Than Yesterday
(Noon) graph (Midnight)
 Legend

Moon


Waning Gibbous
Waning Gibbous, Moon at 16 days in cycle
95% %
Illuminated
 NWS Weather Forecast  - Outlook: This Afternoon & Tonight
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny

Hi 87 °F		 NWS forecast: Mostly sunny, with a high near 87. Northwest wind around 5 mph.
Davis VP+ forecast: Increasing clouds with little temperature change.		   Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 67 °F		 NWS forecast: Partly cloudy, with a low around 67. Southeast wind around 3 mph.
 NWS Weather Forecast  - Five Day Outlook for This Afternoon through Tuesday - Last Update: Fri, 31-Jul-2026 2:22pm EDT
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Saturday

Saturday: Partly Sunny
Partly Sunny
Saturday
Night
Saturday Night: Mostly Cloudy
Mostly Cloudy
Sunday

Sunday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms then Showers And Thunderstorms
Chance Showers And T-Storms then Showers And T-Storms
Monday

Monday: Showers And Thunderstorms
Showers And T-Storms
Monday
Night
Monday Night: Showers And Thunderstorms
Showers And T-Storms
Tuesday

Tuesday: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms
Hi 87 °F Lo 67 °F Hi 90 °F Lo 72 °F Hi 87 °F Lo 71 °F Hi 85 °F Lo 69 °F Hi 86 °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

Clouds
Mostly sunny and mostly clear indicate the same amount of cloud coverage - about 25 percent. Mostly sunny is used during the daytime, and mostly clear is used at night when there is no sun.

Today in Weather History

Weather History for July 31
 
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.