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 Details for Tidal Potomac Small Craft Advisory
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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 Advisory issued for late tonight through Monday morning. Overall the system today through Monday is trending drier.

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: @ 10-May-2026 6:00am - next update at 6:10am  
Temperature Summary Outlook
Currently: 49.9, Max: 58.7, Min: 49.9 49.9°F
Colder 1.0°F than last hour.

Cool

Feels like: 50°F

24-hr difference
-7.6°FColder 7.6°F than yesterday at this time.
  Today Yesterday
High: 58.7°F
12:00am 		75.7°F
4:00pm
Low: 49.9°F
5:46am 		56.0°F
3:53am
High & Low May 2026
High:  86.0°F
05 May at 2:51 PM
Low:  38.9°F
03 May at 7:07 AM
Max Min:  60.6°F
06 May
Min Max:  62.1°F
02 May
High and Low 2026
High:  94.0°F
16 April at 2:47 PM
Low:  5.2°F
27 January at 7:52 AM
Max Min:  66.9°F
04 April
Min Max:  18.4°F
25 January
Record May
High:  93.7°F
at 15:47 on 31 May 2022
Low:  32.0°F
at 03:46 on 10 May 2020
Max Min:  72.0°F
at 23:59 on 27 May 2015
Min Max:  51.3°F
at 14:37 on 09 May 2020
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:  49.9°F
Coldest Wind Chill
Today:  49.9°F
at 5:46am
Yesterday:  56.0°F
at 3:53am
May 2026  38.9°F
03 May at 7:07 AM
2026  2.9°F
01 February at 8:34 AM
Station May  27.4°F
at 07:06 on 09 May 2020
Station All Time  °F
Records began on 24 December 2012
Degree Days
Heating Degree Days
Today: 2.9 Degree Days
Yesterday: 3.3 Degree Days
Cooling Degree Days
Today: 0.0 Degree Days
Yesterday: 2.9 Degree Days
Heat Index
Now:  49.9°F
Warmest Heat Index
Today:  58.7°F
at 00:00
Yesterday:  75.7°F
at 16:00
May 2026  84.5°F
05 May at 2:51 PM
2026  97.0°F
16 April at 3:01 PM
Station Record May  105.0°F
at 13:55 on 26 May 2021
Station All Time  124.4°F
at 13:24 on 25 June 2025
Records began on 24 December 2012
WeatherCam Thumbnail
North North West Camera
North North West WeatherCam
Few Clouds Few Clouds
Calm -
0
Gust:
 0 mph
0 Bft - Calm
Today: 1 mph 4:20am
Gust Month: 19 mph May 5
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 May 2026
High Gust:  19 mph
05 May at 4:05 PM
High Average:  6 mph
05 May at 3:31 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 May
High Gust:  27 mph
at 15:33 on 26 May 2017
High Average:  15 mph
at 14:07 on 08 May 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:  0.0 miles
Yesterday:  15.9 miles
Highest Wind Run
May 2026  45.0 miles
06 May
2026  101.4 miles
07 February
May  139.2 miles
on 13 May 2015
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: 0.27 in
Season Total: 8.39 in
3 days since last rain.

Days Since Last Dry Day: 0
Station High May 2026
High Day:  0.21 in
06 May
High Hour:  0.13 in
06 May at 9:48 AM
High Rain Rate /hr:  0.64 in
07 May at 12:15 AM
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 May
High Day:  2.46 in
on 31 May 2018
High Hour:  2.16 in
at 18:26 on 31 May 2018
High Rain Rate /hr:  7.29 in
at 20:36 on 26 May 2021
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
Overnight

Overnight: Mostly Clear
Mostly Clear
Sunday

Sunday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Sunday
Night
Sunday Night: Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers And T-Storms Likely then Chance Showers And T-Storms
Lo 52 °F Hi 82 °F Lo 52 °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: 92 % Increased 1.0% since last hour.
Dew Point: 47.7°F Decreased 0.3°F since last hour.
Barometer: 29.87 inHg Rising 0.01 inHg/hr
Baro Trend: Rising 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: 6:00am
Sunset: 8:11pm
Moonrise: 2:33am
Moonset: 1:24pm

Day Length:  14:08
Dawn:  05:33
Dusk:  20:40
Daylight Length:  15:07
 There will be 1min 53s more daylight tomorrow

Cloud Base

cloudbase
CB AGL: 507 ft
UV Index

   0.0   
None
High: 0.0 @ 12:00am

Solar Radiation
0 W/m2
High: 0 @  12:00am

Air Quality Index
Current AQI
69
Moderate

Sunlight

14 hrs 11 min 44 sec
of Sunlight Today
Which is
1 min 58 sec Longer
Than Yesterday
(Noon) graph (Midnight)
 Legend

Moon


Waning Crescent
Waning Crescent, Moon at 22 days in cycle
45% %
Illuminated
 NWS Weather Forecast  - Outlook: Overnight & Sunday
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 52 °F		 NWS forecast: Mostly clear, with a low around 52. Southwest wind around 1 mph.
Davis VP+ forecast: Not available		   Sunday

Sunday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms

Hi 82 °F		 NWS forecast: A chance of showers and thunderstorms after 2pm. Mostly sunny. High near 82, with temperatures falling to around 76 in the afternoon. West wind 1 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
 NWS Weather Forecast  - Five Day Outlook for Overnight through Wednesday Night - Last Update: Sun, 10-May-2026 4:54am EDT
Overnight

Overnight: Mostly Clear
Mostly Clear
Sunday

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

Monday: Chance Rain Showers
Chance Rain Showers
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday

Tuesday: Sunny
Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Lo 52 °F Hi 82 °F Lo 52 °F Hi 66 °F Lo 46 °F Hi 69 °F Lo 51 °F Hi 72 °F Lo 52 °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

Weather Terms
Degree Day - Gauges the amount of heating or cooling needed for a building using 65 degrees as a baseline. To compute degree days, the average temperature for a day is taken and referenced to 65. An average temperature of 50 yields 15 heating degree days, while an average temperature of 75 would yield 10 cooling degree days.

Today in Weather History

Weather History for May 10
 
1977   A late season snowstorm hit parts of Pennsylvania, New York, and southern and central New England. Heavier snowfall totals included 27 inches at Slide Mountain, NY and 20 inches at Norwalk, CT. At Boston it was the first May snow in 107 years of records. The heavy wet snow caused extensive damage to trees and power lines, knocking out power to half a million people following the storm.