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Current Northeast Radar & North America Lightning


Northeast Regional Radar


Regional Radar

North America Lightning


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

Updated: @ 21-Sep-2017 7:00pm - next update at 7:15pm  
Temperature Summary Outlook
Currently: 79.0, Max: 87.1, Min: 61.3 79.0°F
Colder 2.1°F than last hour.

Warm

Feels like: 79°F

24-hr difference
-0.7°FColder 0.7°F than yesterday at this time.
  Today Yesterday
High: 87.1°F
1:01pm
86.5°F
1:38pm
Low: 61.3°F
5:25am
62.8°F
7:01am
High & Low September 2017
High:  87.3°F
05 September at 1:19 PM
Low:  48.7°F
10 September at 5:50 AM
Max Min:  66.2°F
14 September
Min Max:  61.9°F
02 September
High and Low 2017
High:  95.9°F
20 July at 1:41 PM
Low:  10.0°F
09 January at 2:00 AM
Max Min:  75.6°F
18 August
Min Max:  24.6°F
07 January
Record September
High:  95.4°F
at 1:37 PM on 09 September 2016
Low:  42.6°F
at 7:04 AM on 18 September 2013
Max Min:  72.7°F
at 5:07 AM on 09 September 2015
Min Max:  61.9°F
at 10:43 PM on 02 September 2017
Station All Time Record
High:  100.4°F
at 2:12 PM on 25 July 2016
Low:  1.0°F
at 7:23 AM on 23 January 2014
Max Min:  77.5°F
at 6:27 AM on 13 August 2016
Min Max:  16.7°F
at 12:04 PM on 16 February 2015
Records began on 24 December 2012
Wind Chill
Now:  79.0°F
Coldest Wind Chill
Today:  61.3°F
at 5:25am
Yesterday:  62.8°F
at 7:01am
September 2017  48.7°F
10 September at 5:50 AM
2017  4.1°F
08 January at 2:24 AM
Station September  42.6°F
at 7:04 AM on 18 September 2013
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: 0.8 Degree Days
Yesterday: 0.2 Degree Days
Cooling Degree Days
Today: 7.8 Degree Days
Yesterday: 8.5 Degree Days
Heat Index
Now:  79.0°F
Warmest Heat Index
Today:  88.1°F
at 12:54
Yesterday:  86.5°F
at 13:35
September 2017  90.9°F
05 September at 1:19 PM
2017  106.7°F
18 August at 1:11 PM
Station Record September  105.6°F
at 1:36 PM on 10 September 2016
Station All Time  114.2°F
at 12:45 PM on 19 July 2013
Records began on 24 December 2012
Mostly cloudy Mostly cloudy
 Calm ---
0.0
Gust:
0.0 mph
0 Bft - Calm
Today: 9.2 mph 1:19pm
Gust Month: 15.9 mph September 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 September 2017
High Gust:  15.9 mph
05 September at 5:36 PM
High Average:  8.9 mph
08 September at 12:08 PM
Station High 2017
High Gust:  32.2 mph
19 August at 9:02 PM
High Average:  22.7 mph
22 March at 10:08 AM
Station Record September
High Gust:  21.0 mph
at 1:39 PM on 06 September 2016
High Average:  18.4 mph
at 4:29 PM on 13 September 2015
Station All Time Record
High Gust:  39.3 mph
at 10:04 PM on 14 February 2015
High Average:  22.7 mph
at 10:08 AM on 22 March 2017
Records began on 24 December 2012
Wind Run
Today:  24.8 miles
Yesterday:  29.8 miles
Highest Wind Run
September 2017  58.5 miles
19 September
2017  179.1 miles
14 March
September  97.0 miles
on 29 September 2016
Station All Time  246.9 miles
on 15 February 2015
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: 1.65 in
Season Total: 31.68 in
7 days since last rain.
Days Since Last Dry Day: 0
Station High September 2017
High Day:  0.66 in
02 September
High Hour:  0.20 in
02 September at 5:38 AM
High Rain Rate /hr:  0.72 in
02 September at 8:28 AM
Station High 2017
High Day:  2.00 in
06 July
High Hour:  6.61 in
04 August at 2:09 PM
High Rain Rate /hr:  3.59 in
28 July at 2:12 PM
Station Record September
High Day:  1.77 in
on 29 September 2015
High Hour:  1.11 in
at 1:10 AM on 02 September 2013
High Rain Rate /hr:  2.40 in
at 12:09 PM on 28 September 2016
Station All Time Record
High Day:  3.02 in
on 30 April 2014
High Hour:  6.61 in
at 2:09 PM on 04 August 2017
High Rain Rate /hr:  5.03 in
at 5:35 PM on 03 June 2016
High Month:  7.18 in
April 2014
Records began on 24 December 2012
Tonight

Tonight: Partly Cloudy then Patchy Fog
Partly Cloudy then Patchy Fog
Friday

Friday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Lightning VA MD DC WV DE
Viginia Lighting
Radar Washington DC Metro Area
Local Radar
Storm Prediction Center Activity Chart
SPC Activity
Humidity & Barometer
Humidity: 56 % Increased 9.0% since last hour.
Dew Point: 62.0°F Increased 1.0°F since last hour.
Barometer: 30.06 inHg  
Baro Trend: Steady
Today
Pressure High:  30.11 in
Pressure Low:  30.03 in
Dewpoint High:  65.3 °F
Dewpoint Low:  59.3 °F
Humidity High:  96%
Humidity Low:  42%
Station Record
Pressure High:  31.41 in
at 12:14 PM on 23 March 2017
Pressure Low:  29.12 in
at 5:28 PM on 12 March 2014
Dewpoint High:  79.7 °F
at 11:26 AM on 19 July 2013
Dewpoint Low:  -58.6 °F
at 6:50 PM on 19 February 2017
Records began on 24 December 2012
Snow
Snow Depth: 0 in
Snowfall Today: No snow today
Storm Total: 0 in
Total Season Snow: 0 in
Total Last Season: 5.2 in
Fire Danger
firedanger
Almanac
Sunrise: 6:57am
Sunset: 7:08pm
Moonrise: 8:11am
Moonset: 8:10pm
Day Length:  12:11
Dawn:  06:30
Dusk:  19:34
Daylight Length:  13:04
 There will be 2min 31s less daylight tomorrow
Cloud Base
cloudbase
CB: 3861 ft
UV Index Forecast Today
21-Sep-2017

6.3  High 
UV Index Forecast Tomorrow
22-Sep-2017

6.4  High 
Air Quality Index
Current AQI 44
Good
Sunlight
12 hrs 9 min 50 sec
of Sunlight Today
Which is
2 min 30 sec Shorter
Than Yesterday

(Noon)
graph (Midnight)
Legend
Moon
Waxing Crescent
Waxing Crescent, Moon at 2 days in cycle
3 %
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 Temperature Graph Thumbnail Pressure Graph Thumbnail Rain Graph Thumbnail
Wind Direction Thumbnail Temp Min/Max Graph Thumbnail Humidity Graph Thumbnail Today's Rainfall Graph Thumbnail Daily Rain Graph Thumbnail
 NWS Weather Forecast  - Outlook: Tonight & Friday
Tonight

Tonight: Partly Cloudy then Patchy Fog
Partly Cloudy then Patchy Fog

Lo 63 °F
NWS forecast: Patchy fog after 2am. Partly cloudy, with a low around 63. North wind around 6 mph.
  Friday

Friday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny

Hi 83 °F
NWS forecast: Patchy fog before 11am. Mostly sunny, with a high near 83. North northwest wind 3 to 8 mph.
 NWS Weather Forecast  - Five Day Outlook for Tonight through Monday Night - Last Update: Thu, 21-Sep-2017 5:21pm EDT
Tonight

Tonight: Partly Cloudy then Patchy Fog
Partly Cloudy then Patchy Fog
Friday

Friday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday

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

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

Monday: Mostly Sunny
Mostly Sunny
Monday
Night
Monday Night: Mostly Cloudy
Mostly Cloudy
Lo 63 °F Hi 83 °F Lo 61 °F Hi 84 °F Lo 62 °F Hi 87 °F Lo 66 °F Hi 86 °F Lo 66 °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.
Countdown to Fall
 Autumn Equinox begins September 22nd at 4:02pm   EDT  
 

 

Random Weather Facts

Extremes
The highest temperature ever recorded in the United States was 134 degrees F at Greenland Ranch in Death Valley, California.

Today in Weather History

Weather History for September 21
 
1987
Tropical Storm Emily, which formed in the Carribean the previous afternoon, caused considerable damage to the banana industry of Saint Vincent in the Windward Islands. Unseasonably hot weather continued in Florida and the western U.S. Redding CA and Red Bluff CA, with record highs of 108 degrees, tied for honors as the hot spot in the nation. (The National Weather Summary)

1989
Hurricane Hugo slammed into the South Carolina coast about 11 PM, making landfall near Sullivans Island. Hurricane Hugo was directly responsible for thirteen deaths, and indirectly responsible for twenty-two others. A total of 420 persons were injured in the hurricane, and damage was estimated at eight billion dollars, including two billion dollars damage to crops. Sustained winds reached 85 mph at Folly Beach SC, with wind gusts as high was 138 mph. Wind gusts reached 98 mph at Charleston, and 1S09 mph at Shaw AFB. The biggest storm surge occurred in the McClellanville and Bulls Bay area of Charleston County, with a storm surge of 20.2 feet reported at Seewee Bay. Shrimp boats were found one half mile inland at McClellanville. (National Weather Summary) (Storm Data)