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Current Northeast Radar & North America Lightning


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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: @ 18-Nov-2017 6:15pm - next update at 6:30pm  
Temperature Summary Outlook
Currently: 57.4, Max: 59.5, Min: 32.0 57.4°F
Colder 0.1°F than last hour.

Cool

Feels like: 57°F

24-hr difference
15.5°FWarmer 15.5°F than yesterday at this time.
  Today Yesterday
High: 59.5°F
12:44pm
54.0°F
12:46pm
Low: 32.0°F
12:56am
33.1°F
11:58pm
High & Low November 2017
High:  78.8°F
03 November at 1:41 PM
Low:  21.9°F
11 November at 7:15 AM
Max Min:  53.8°F
03 November
Min Max:  38.5°F
11 November
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 November
High:  80.8°F
at 1:09 PM on 06 November 2015
Low:  14.5°F
at 7:01 AM on 19 November 2014
Max Min:  63.1°F
at 12:57 AM on 06 November 2015
Min Max:  36.5°F
at 11:06 PM on 19 November 2014
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:  57.4°F
Coldest Wind Chill
Today:  32.0°F
at 12:56am
Yesterday:  33.1°F
at 11:58pm
November 2017  20.5°F
11 November at 3:45 AM
2017  4.1°F
08 January at 2:24 AM
Station November  14.5°F
at 7:01 AM on 19 November 2014
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: 14.2 Degree Days
Yesterday: 21.4 Degree Days
Cooling Degree Days
Today: 0.0 Degree Days
Yesterday: 0.0 Degree Days
Heat Index
Now:  57.4°F
Warmest Heat Index
Today:  59.5°F
at 12:44
Yesterday:  54.0°F
at 12:46
November 2017  78.8°F
03 November at 1:41 PM
2017  106.7°F
18 August at 1:11 PM
Station Record November  82.6°F
at 1:09 PM on 06 November 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 E E
3.6
Gust:
5.9 mph
1 Bft - Light air
Today: 15.9 mph 12:30pm
Gust Month: 23.0 mph November 10
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 November 2017
High Gust:  23.0 mph
10 November at 10:44 AM
High Average:  11.3 mph
06 November at 7:07 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 November
High Gust:  30.1 mph
at 6:10 PM on 20 November 2016
High Average:  18.3 mph
at 8:53 AM on 01 November 2013
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:  77.5 miles
Yesterday:  66.2 miles
Highest Wind Run
November 2017  95.2 miles
10 November
2017  179.1 miles
14 March
November  188.5 miles
on 20 November 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: 1.90 in
Season Total: 36.43 in
5 days since last rain.
Days Since Last Dry Day: 0
Station High November 2017
High Day:  0.94 in
07 November
High Hour:  0.20 in
07 November at 1:09 PM
High Rain Rate /hr:  0.60 in
04 November at 6:12 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 November
High Day:  0.94 in
on 07 November 2017
High Hour:  0.27 in
at 9:16 PM on 30 November 2016
High Rain Rate /hr:  1.32 in
at 8:51 PM on 30 November 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: Rain Showers
Rain Showers
Sunday

Sunday: Rain Showers Likely then Mostly Sunny
Rain Showers Likely then Mostly Sunny
Sunday
Night
Sunday 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: 53 % Decreased 1.0% since last hour.
Dew Point: 40.4°F Increased 0.2°F since last hour.
Barometer: 29.56 inHg Falling 0.02  inHg/hr
Baro Trend: Falling
Today
Pressure High:  30.09 in
Pressure Low:  29.55 in
Dewpoint High:  40.5 °F
Dewpoint Low:  26.6 °F
Humidity High:  81%
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: 6:56am
Sunset: 4:54pm
Moonrise: 6:46am
Moonset: 5:22pm
Day Length:  09:58
Dawn:  06:27
Dusk:  17:22
Daylight Length:  10:55
 There will be 1min 46s less daylight tomorrow
Cloud Base
cloudbase
CB: 3858 ft
UV Index Forecast Today
18-Nov-2017

2.2  Low 
UV Index Forecast Tomorrow
19-Nov-2017

1.9  Low 
Air Quality Index
Current AQI 57
Moderate
Sunlight
9 hrs 56 min 52 sec
of Sunlight Today
Which is
1 min 44 sec Shorter
Than Yesterday

(Noon)
graph (Midnight)
Legend
Moon
New Moon
New Moon, Moon at 0 days in cycle
0 %
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 & Sunday
Tonight

Tonight: Rain Showers
Rain Showers

Lo 48 °F ↑
NWS forecast: Rain showers after 9pm. Cloudy. Low around 48, with temperatures rising to around 55 overnight. South southwest wind 12 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
  Sunday

Sunday: Rain Showers Likely then Mostly Sunny
Rain Showers Likely then Mostly Sunny

Hi 52 °F ↓
NWS forecast: Rain showers likely before 7am. Mostly sunny. High near 52, with temperatures falling to around 45 in the afternoon. West northwest wind 20 to 25 mph, with gusts as high as 43 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
 NWS Weather Forecast  - Five Day Outlook for Tonight through Wednesday Night - Last Update: Sat, 18-Nov-2017 4:37pm EST
Tonight

Tonight: Rain Showers
Rain Showers
Sunday

Sunday: Rain Showers Likely then Mostly Sunny
Rain Showers Likely then Mostly Sunny
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Chance Rain Showers
Chance Rain Showers
Wednesday

Wednesday: Chance Rain Showers then Mostly Sunny
Chance Rain Showers then Mostly Sunny
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Lo 48 °F ↑ Hi 52 °F ↓ Lo 30 °F Hi 50 °F Lo 32 °F Hi 57 °F Lo 41 °F Hi 52 °F Lo 31 °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

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 November 18
 
1955
An early season cold snap finally came to an end. Helena, MT, experienced 138 consecutive hours of subzero temperatures, including a reading of 29 below zero, which surpassed by seven degrees their previous record for the month of November. Missoula MT broke their November record by 12 degrees with a reading of 23 below zero, and Salt Lake City UT smashed their previous November record of zero with a reading of 14 below. Heavy snow in the Great Basin closed Donner Pass CA, and total crop damage from the cold wave amounted to eleven million dollars. (David Ludlum)

1987
It was a windy day across parts of the nation. Gale force winds whipped the Great Lakes Region. Winds gusting to 80 mph in western New York State damaged buildings and flipped over flatbed trailers at Churchville. In Montana, high winds in the Upper Yellowstone Valley gusted to 64 mph at Livingston. Strong Santa Ana winds buffeted the mountains and valleys of southern California. (The National Weather Summary) (Storm Data)