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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: @ 13-Dec-2017 9:15pm - next update at 9:30pm  
Temperature Summary Outlook
Currently: 33.8, Max: 35.8, Min: 20.5 33.8°F
Warmer 0.5°F than last hour.

Cool

Feels like: 34°F

24-hr difference
7.2°FWarmer 7.2°F than yesterday at this time.
  Today Yesterday
High: 35.8°F
2:05pm
47.3°F
1:42pm
Low: 20.5°F
7:25am
23.7°F
11:54pm
High & Low December 2017
High:  62.1°F
05 December at 1:41 PM
Low:  20.5°F
13 December at 7:25 AM
Max Min:  45.1°F
05 December
Min Max:  35.6°F
09 December
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 December
High:  74.8°F
at 1:41 PM on 13 December 2015
Low:  11.1°F
at 5:13 AM on 16 December 2016
Max Min:  63.0°F
at 11:40 PM on 24 December 2015
Min Max:  27.0°F
at 11:38 PM on 16 December 2016
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:  33.8°F
Coldest Wind Chill
Today:  10.5°F
at 1:54am
Yesterday:  12.9°F
at 11:07pm
December 2017  10.5°F
13 December at 1:54 AM
2017  4.1°F
08 January at 2:24 AM
Station December  7.8°F
at 5:09 PM on 15 December 2016
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: 32.8 Degree Days
Yesterday: 27.4 Degree Days
Cooling Degree Days
Today: 0.0 Degree Days
Yesterday: 0.0 Degree Days
Heat Index
Now:  33.8°F
Warmest Heat Index
Today:  35.8°F
at 14:05
Yesterday:  47.3°F
at 13:42
December 2017  62.1°F
05 December at 1:41 PM
2017  106.7°F
18 August at 1:11 PM
Station Record December  74.8°F
at 1:41 PM on 13 December 2015
Station All Time  114.2°F
at 12:45 PM on 19 July 2013
Records began on 24 December 2012
Overcast Overcast
 Wind from SE SE
2.7
Gust:
4.1 mph
1 Bft - Light air
Today: 19.2 mph 1:20am
Gust Month: 35.1 mph December 6
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 December 2017
High Gust:  35.1 mph
06 December at 1:21 PM
High Average:  13.0 mph
12 December at 9:57 PM
Station High 2017
High Gust:  35.1 mph
06 December at 1:21 PM
High Average:  22.7 mph
22 March at 10:08 AM
Station Record December
High Gust:  35.1 mph
at 1:21 PM on 06 December 2017
High Average:  20.6 mph
at 11:09 AM on 15 December 2016
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:  106.5 miles
Yesterday:  116.2 miles
Highest Wind Run
December 2017  116.2 miles
12 December
2017  179.1 miles
14 March
December  166.8 miles
on 18 December 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: 0.38 in
Season Total: 36.91 in
2 days since last rain.
Days Since Last Dry Day: 0
Station High December 2017
High Day:  0.20 in
10 December
High Hour:  0.11 in
10 December at 1:02 PM
High Rain Rate /hr:  0.36 in
10 December at 1:02 PM
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:  4.67 in
30 October at 5:11 AM
Station Record December
High Day:  0.94 in
on 06 December 2016
High Hour:  0.27 in
at 4:17 PM on 06 December 2016
High Rain Rate /hr:  1.44 in
at 5:45 PM on 25 December 2015
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: Chance Light Snow
Chance Light Snow
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly 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: 29 % Increased 1.0% since last hour.
Dew Point: 5.0°F Increased 1.1°F since last hour.
Barometer: 29.66 inHg Falling 0.02  inHg/hr
Baro Trend: Falling
Today
Pressure High:  29.88 in
Pressure Low:  29.62 in
Dewpoint High:  5.5 °F
Dewpoint Low:  -9.3 °F
Humidity High:  30%
Humidity Low:  20%
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: 3 in
Total Last Season: 5.2 in
Fire Danger
firedanger
Almanac
Sunrise: 7:20am
Sunset: 4:48pm
Moonrise: 2:47am
Moonset: 2:19pm
Day Length:  09:28
Dawn:  06:50
Dusk:  17:18
Daylight Length:  10:28
 There will be 0min 29s less daylight tomorrow
Cloud Base
cloudbase
CB: 6550 ft
UV Index Forecast Today
14-Dec-2017

1.4  Low 
UV Index Forecast Tomorrow
14-Dec-2017

1.3  Low 
Air Quality Index
Current AQI 30
Good
Sunlight
9 hrs 28 min 30 sec
of Sunlight Today
Which is 29 sec Shorter
Than Yesterday

(Noon)
graph (Midnight)
Legend
Moon
Waning Crescent
Waning Crescent, Moon at 24 days in cycle
15 %
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 & Thursday
Tonight

Tonight: Chance Light Snow
Chance Light Snow

Lo 26 °F
NWS forecast: A chance of snow before 1am. Mostly cloudy, with a low around 26. Southwest wind 7 to 10 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
  Thursday

Thursday: Mostly Sunny
Mostly Sunny

Hi 40 °F ↓
NWS forecast: Mostly sunny. High near 40, with temperatures falling to around 33 in the afternoon. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.
 NWS Weather Forecast  - Five Day Outlook for Tonight through Sunday Night - Last Update: Wed, 13-Dec-2017 7:45pm EST
Tonight

Tonight: Chance Light Snow
Chance Light Snow
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday

Friday: Slight Chance Snow Showers
Slight Chance Snow Showers
Friday
Night
Friday Night: Slight Chance Snow Showers
Slight Chance Snow Showers
Saturday

Saturday: Slight Chance Snow Showers then Mostly Sunny
Slight Chance Snow Showers then Mostly Sunny
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday

Sunday: Slight Chance Rain Showers
Slight Chance Rain Showers
Sunday
Night
Sunday Night: Chance Rain Showers
Chance Rain Showers
Lo 26 °F Hi 40 °F ↓ Lo 22 °F Hi 36 °F Lo 26 °F Hi 43 °F Lo 27 °F Hi 47 °F Lo 36 °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 Winter
 Winter Solstice begins December 21st at 11:28am   EST  
 

 

Random Weather Facts

Astronomy
The gravity on Jupiter is 2.6 times that of the Earth.

Today in Weather History

Weather History for December 13
 
1988
Low pressure off the Atlantic coast produced up to a foot of snow in eastern Nassau County and western Suffolk County of southeastern New York State. Mild weather prevailed across the western half of the country. Nine cities reported record high temperatures for the date, including Goodland KS with a reading of 74 degrees. (The National Weather Summary) (Storm Data)

2002
A powerful Pacific storm system plowed into the western United States during the 13th-16th, producing high winds, heavy rains, significant mountain snowfall and causing 9 deaths (Associated Press). Rainfall amounts exceeding 10 inches occurred in parts of California, and wind gusts over 45 mph produced up to 1.9 million power outages during the period (Pacific Gas & Electric).