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 Details for Tidal Potomac Small Craft Advisory
 Tidal Potomac
 Details for Tidal Potomac Small Craft Advisory
 Loudon Cnty(E), VA
 Details for Loudon Cnty(E), VA Frost Advisory
 Prince William Cnty, VA
 Details for Prince William Cnty, VA Frost Advisory
 Montgomery Cnty(C+SE), MD
 Details for Montgomery Cnty(C+SE), MD Frost Advisory
 Montgomery Cnty(NW), MD
 Details for Montgomery Cnty(NW), MD Frost Advisory
 Loudon Cnty(W), VA
 Details for Loudon Cnty(W), VA Frost Advisory
 Fauquier Cnty(N), VA
 Details for Fauquier Cnty(N), VA Frost Advisory
 Fauquier Cnty(S), VA
 Details for Fauquier Cnty(S), VA Frost Advisory
 Montgomery Cnty(C+SE), MD
 Details for Montgomery Cnty(C+SE), MD Test Message
 Montgomery Cnty(NW), MD
 Details for Montgomery Cnty(NW), MD Test Message

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Small Craft Advisory SMALL CRAFT ADVISORY - Tidal Potomac
Frost Advisory FROST ADVISORY - Fauquier Cnty(N), VA  - Fauquier Cnty(S), VA  - Loudon Cnty(E), VA  - Loudon Cnty(W), VA  - Montgomery Cnty(C+SE), MD  - Montgomery Cnty(NW), MD  - Prince William Cnty, VA
Test Message TEST MESSAGE - Montgomery Cnty(C+SE), MD  - Montgomery Cnty(NW), MD

WASHINGTON DC METRO AREA FORECAST DISCUSSION
A low pressure system off the Mid-Atlantic coast will continue to move further east through Friday. High pressure will build toward the Mid-Atlantic from the Midwest through tonight, then settle overhead through this weekend into early next week.

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: @ 17-Oct-2024 9:40pm - next update at 9:50pm  
Temperature Summary Outlook
Currently: 45.7, Max: 61.0, Min: 36.8 45.7°F
Colder 3.7°F than last hour.

Cold

Feels like: 46°F

24-hr difference
-4°FColder 4.0°F than yesterday at this time.
  Today Yesterday
High: 61.0°F
4:18pm 		57.7°F
2:52pm
Low: 36.8°F
8:03am 		37.9°F
8:04am
High & Low October 2024
High:  82.3°F
13 October at 2:52 PM
Low:  36.8°F
17 October at 8:03 AM
Max Min:  64.2°F
04 October
Min Max:  56.5°F
15 October
High and Low 2024
High:  101.9°F
02 August at 3:51 PM
Low:  8.9°F
17 January at 7:32 AM
Max Min:  78.1°F
23 June
Min Max:  26.5°F
20 January
Record October
High:  93.9°F
at 3:52 PM on 02 October 2019
Low:  29.8°F
at 6:50 AM on 19 October 2015
Max Min:  72.3°F
at 5:28 AM on 09 October 2017
Min Max:  48.9°F
at 3:45 PM on 26 October 2018
Station All Time Record
High:  101.9°F
at 3:51 PM on 02 August 2024
Low:  1.0°F
at 7:23 AM on 23 January 2014
Max Min:  78.1°F
at 6:58 AM on 23 June 2024
Min Max:  16.7°F
at 12:04 PM on 16 February 2015
Records began on 24 December 2012
Wind Chill
Now:  45.7°F
Coldest Wind Chill
Today:  35.3°F
at 8:25am
Yesterday:  35.8°F
at 8:46am
October 2024  35.3°F
17 October at 8:25 AM
2024  3.7°F
17 January at 9:00 AM
Station October  29.8°F
at 6:50 AM on 19 October 2015
Station All Time  -15.8°F
at 1:57 AM on 21 February 2015
Records began on 24 December 2012
Degree Days
Heating Degree Days
Today: 14.8 Degree Days
Yesterday: 17.0 Degree Days
Cooling Degree Days
Today: 0.0 Degree Days
Yesterday: 0.0 Degree Days
Heat Index
Now:  45.7°F
Warmest Heat Index
Today:  61.0°F
at 16:18
Yesterday:  57.7°F
at 14:52
October 2024  83.3°F
13 October at 2:52 PM
2024  122.8°F
16 July at 2:48 PM
Station Record October  100.0°F
at 1:43 PM on 02 October 2019
Station All Time  122.8°F
at 2:48 PM on 16 July 2024
Records began on 24 December 2012
WeatherCam Thumbnail
North North West Camera
North North West WeatherCam
Clear Clear
Calm ENE
0.0
Gust:
 0.0 mph
0 Bft - Calm
Today: 14.0 mph 10:37am
Gust Month: 21.0 mph October 14
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 October 2024
High Gust:  21.0 mph
14 October at 4:19 PM
High Average:  6.0 mph
14 October at 9:52 AM
Station High 2024
High Gust:  28.0 mph
10 March at 5:26 PM
High Average:  14.0 mph
12 May at 5:00 PM
Station Record October
High Gust:  28.1 mph
at 11:52 AM on 22 October 2016
High Average:  16.7 mph
at 11:53 AM on 22 October 2016
Station All Time Record
High Gust:  42.2 mph
at 12:56 PM on 04 January 2018
High Average:  24.3 mph
at 1:07 PM on 02 March 2018
Records began on 24 December 2012
Wind Run

Today:  23.4 miles
Yesterday:  21.8 miles
Highest Wind Run
October 2024  46.5 miles
14 October
2024  106.4 miles
28 February
October  200.4 miles
on 22 October 2016
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: 0.11 in
Season Total: 24.20 in
14 days since last rain.

Days Since Last Dry Day: 0
Station High October 2024
High Day:  0.05 in
01 October
High Hour:  0.02 in
02 October at 3:36 AM
High Rain Rate /hr:  0.14 in
02 October at 3:39 AM
Station High 2024
High Day:  1.53 in
09 January
High Hour:  0.77 in
03 August at 6:32 PM
High Rain Rate /hr:  9.14 in
10 July at 7:00 PM
Station Record October
High Day:  1.89 in
on 25 October 2021
High Hour:  0.86 in
at 8:17 PM on 25 October 2021
High Rain Rate /hr:  4.72 in
at 7:25 PM on 25 October 2021
Station All Time Record
High Day:  5.17 in
on 21 July 2018
High Hour:  2.21 in
at 4:13 PM on 22 July 2020
High Rain Rate /hr:  64.00 in
at 10:49 AM 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
Tonight

Tonight: Clear
Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Clear
Clear
Lo 38 °F Hi 67 °F Lo 41 °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: 75 % Increased 7.0% since last hour.
Dew Point: 38.2°F Decreased 0.3°F since last hour.
Barometer: 30.297 inHg Rising 0.01 inHg/hr
Baro Trend: Rising slowly
Today
Pressure High:  30.319 in
Pressure Low:  30.215 in
Dewpoint High:  41.8 °F
Dewpoint Low:  33.0 °F
Humidity High:  89%
Humidity Low:  46%
Station Record
Pressure High:  31.410 in
at 12:14 PM on 23 March 2017
Pressure Low:  28.987 in
at 7:41 AM on 07 February 2020
Dewpoint High:  82.7 °F
at 11:55 AM on 05 July 2024
Dewpoint Low:  -27.0 °F
at 1:57 AM 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: 10.00 in
Total Last Season: 0.0 in
Fire Danger
firedanger
Almanac
Sunrise: 7:21am
Sunset: 6:28pm
Moonset: 7:28am
Moonrise: 6:30pm

Day Length:  11:06
Dawn:  06:55
Dusk:  18:55
Daylight Length:  12:00
 There will be 2min 24s less daylight tomorrow

Cloud Base

cloudbase
CB: 1704 ft
UV Index

   0.0   
None
High: 3.1 @ 12:50pm

Solar Radiation
0 W/m2
High: 717 @  12:50pm

Air Quality Index
Current AQI
14
Good

Sunlight

11 hrs 6 min 16 sec
of Sunlight Today
Which is
2 min 25 sec Shorter
Than Yesterday
(Noon) graph (Midnight)
 Legend

Moon


Full Moon
Full Moon, Moon at 15 days in cycle
99% %
Illuminated
Trends
These graphs present the temperature, pressure, rainfall, and wind speed trends for the last 24 hours.
The thumbnail graphs are sampled every ten minutes.
The large graphs are sampled every minute.
Weather Graphs
Click on weather description tab below to display the corresponding graph in the panel above.
Wind Graph Thumbnail Wind Direction Thumbnail Temperature Graph Thumbnail Temp Min/Max Graph Thumbnail Humidity Graph Thumbnail Pressure Graph Thumbnail
Today's Rainfall Graph Thumbnail Rain Graph Thumbnail Daily Rain Graph Thumbnail Solar Radiation Graph Thumbnail UV Index Graph Thumbnail Sunshine Hours Graph Thumbnail
 NWS Weather Forecast  - Outlook: Tonight & Friday
Tonight

Tonight: Clear
Clear

Lo 38 °F		 NWS forecast: Clear, with a low around 38. North wind around 7 mph.
Davis VP+ forecast: Partly cloudy with little temperature change.		   Friday

Friday: Sunny
Sunny

Hi 67 °F		 NWS forecast: Sunny, with a high near 67. North wind around 8 mph.
 NWS Weather Forecast  - Five Day Outlook for Tonight through Monday Night - Last Update: Thu, 17-Oct-2024 7:30pm EDT
Tonight

Tonight: Clear
Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Clear
Clear
Saturday

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Clear
Clear
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Clear
Clear
Lo 38 °F Hi 67 °F Lo 41 °F Hi 70 °F Lo 41 °F Hi 73 °F Lo 45 °F Hi 75 °F Lo 48 °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

Recycling
The average household throws away 13,000 separate pieces of paper each year. Most is packaging and junk mail.

Today in Weather History

Weather History for October 17
 
1950
Small but powerful Hurricane King struck Miami, FL. The hurricane packs winded to 122 mph, with gusts to 150 mph. Hurricane King then moved up the Florida peninsula to Georgia. Four persons were killed and damage was 28 million dollars. (David Ludlum) (The Weather Channel)
1989
Showers and thunderstorms representing the remnants of Hurricane Jerry deluged southeast Kentucky with four to six inches of rain in 18 to 24 hours, resulting in widespread flash flooding. Flooding resulted in more than five million dollars damage. Temperatures again warmed into the 80s and lower 90s in the southeastern U.S. Lakeland FL and Orlando FL reported record highs of 95 degrees. (The National Weather Summary) (Storm Data)