Click on button above to view VA Watches/Warnings/Special Wx Statements.


Fairfax, VA Weather and Climate Synopsis

To access other UK Agricultural Weather Center Pages use the pull-down menu below.

(Click image to zoom) or Click Here

36 Hr. Forecast Map
All Radar images NOAA/UKAWC
Satellite images from NOAA

Weather Summary Hourly Observations Nowcast Agricultural Weather Outlook
7 Day Forecast Medium & Long Range Outlook Almanac Historical Facts





US Weekly Rainfall Departure



US Weekly Temperature Departure
Also see:




A joint service of the UK Ag Weather Center and the National Weather Service.


Weather Summary for SW VA...SE WV...and NW NC
National Weather Service Blacksburg VA
510 PM EDT Sun Jul 22 2018

.FORECAST SUMMARY...
Scattered showers and thunderstorms will pass across the region
this evening and through the night as a deep upper level low
pressure system drifts slowly eastward from the central Ohio 
River valley. Some storms may be slow moving, leading to prolonged
periods of locally heavy rain. Storms may also produce gusty winds
and small hail. Overnight temperatures will be mainly in the 60s,
perhaps holding around 70 in spots across the Southside of
Virginia. Additional showers and thunderstorms can be expected on
Monday. Afternoon high temperatures will hold in the 70s for most
of the region, possibly reaching the low 80s across eastern portions
of the Piedmont.


National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]

Click here for UKAWC Point Agricultural, Lawn & Garden Forecast/Outlook in case of corrupt tables.
Regional Hourly Observations For FAIRFAX County
700 PM EDT SUN JUL 22 2018


NORTHERN VIRGINIA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
WASH NATIONAL  LGT RAIN  75  70  84 SE14      29.84S                  
DULLES         PTSUNNY   78  72  81 E7        29.84R                  
FORT BELVOIR   LGT RAIN  75  73  91 CALM      29.82R                  
QUANTICO       LGT RAIN  76  71  85 E3        29.82S                  
FREDERICKSBRG* FAIR      75  75 100 CALM      29.80F                  
STAFFORD*      PTSUNNY   74  74 100 NW3       29.85F                  
WARRENTON      PTSUNNY   82  69  64 E7        29.82S                  
CULPEPER*      FAIR      82  69  62 CALM      29.82S                  
MANASSAS*      PTSUNNY   79  72  79 E9        29.83R                  
LEESBURG*      CLOUDY    77  72  83 E7        29.85R                  
WINCHESTER     FAIR      73  68  83 E5        29.85S                  
FRONT ROYAL*   CLOUDY    79  70  73 CALM      29.82S                  
LURAY*         MOCLDY    79  64  61 E3        29.82F                  

Current Temperatures, Dewpoint, RH, Wind, Regional Obs, Surface 4-Panel


Current Agricultural Weather Conditions in Virginia
Based on observations at 700pm EDT, Sunday July 22, 2018

Across Virginia...temperatures are near 78 degrees north, near 79 degrees central, and near 84 degrees south. Current sky conditions are partly sunny north, partly sunny central, and fair south. In the north, relative humidity is near 81%, and the dew point is near 72 degrees. In the central part of the state, relative humidity is near 79%, and the dew point is near 72 degrees. In the south, relative humidity is near 67%, and the dew point is near 72 degrees. The livestock heat stress category is no stress north, no stress central, and danger south. Winds are from the east at 7 mph north, where conditions are favorable for spraying. Winds are from the southeast at 9 mph central, where conditions are favorable for spraying. Winds are from the east at 5 mph south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 86 degrees at Norfolk. The lowest temperature is FAIR degrees at Roanoke.


Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this county will these
forecasts be issued. Currently, there is no short term forecast in effect.

US Radar, All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
Hazardous Weather Outlook For FAIRFAX County,VA

443 PM EDT Sun Jul 22 2018

 DAY ONE  Tonight

A Flash Flood Watch is in effect until midnight tonight for the
entire outlook area.

Thunderstorms may produce isolated damaging wind gusts this
afternoon and evening. Scattered showers and storms with gusty 
winds over the waters may also require Special Marine Warnings.

 DAYS TWO THROUGH SEVEN  Monday through Saturday

Scattered to numerous incidents of flooding are likely Monday 
into Wednesday. Flash Flood Watches will likely be required.

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not expected at this time.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For FAIRFAX County, VA
Issued at 731 PM EDT Sun Jul 22 2018


FLASH FLOOD WATCH IN EFFECT UNTIL MIDNIGHT EDT TONIGHT

TONIGHT
Widespread showers and scattered thunderstorms this evening, then numerous showers with a slight chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall this evening. Lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of rain 90 percent.

MONDAY
A chance of showers in the morning, then showers with a chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Highs in the lower 80s. Southeast winds 5 to 10 mph. Chance of rain 80 percent.

MONDAY NIGHT
Showers with a chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of rain 80 percent.

TUESDAY
Showers in the morning, then showers with a chance of thunderstorms in the afternoon. Highs in the lower 80s. Southeast winds around 10 mph. Chance of rain 80 percent.

TUESDAY NIGHT
A chance of thunderstorms in the evening. Showers likely. Lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of rain 70 percent.

WEDNESDAY
Showers with a chance of thunderstorms. Highs in the lower 80s. Chance of rain 80 percent.

WEDNESDAY NIGHT
Showers likely. Lows in the lower 70s. Chance of rain 70 percent.

THURSDAY
Showers likely with a chance of thunderstorms. Highs in the mid 80s. Chance of rain 70 percent.

THURSDAY NIGHT
Partly cloudy. Lows in the lower 70s.

FRIDAY
Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent.

FRIDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows around 70.

SATURDAY
Partly sunny with a chance of showers. Highs in the mid 80s. Chance of rain 40 percent.

SATURDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows in the upper 60s.

SUNDAY
Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent.

12-48 Hr Surface Forecast Maps, TWC 4-Panel Surface Forecast, Fire Danger, Day 1 Precip, Day 2 Precip, Days 1-5 Precip, Severe Weather Pot.-Day 1, Day 2


Medium & Long Range Outlook For Virginia
                             VIRGINIA                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                JUL 28-AUG 1 JUL 30-AUG 5    JUL       JUL-SEP                      
                 -----------  -----------  --------  ---------
   Temperature:     Normal       Normal      Above      Above                      
 Precipitation:      Above        Above     Normal      Above                      

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
Almanac Information

Sunday July 22, 2018 the 203th Day of Year

---------------------------------------------------
SUN
Declination 20.080000
Distance 0.999716 AU
Rise 06:11 EDT Set 20:33 EDT
Transit Meridian 13:22 EDT
Civil Twilight Begins 05:42 EDT Ends 21:02 EDT

Calculations made for central point in the state.
Time in ET -- and will vary due to location and
elevation -- Priddy


Historical Weather And Climate Facts For Today

////////////////////////////
JULY 22ND...HISTORIC WEATHER EVENTS
...1901...
Richmond, Kentucky's hottest temperature on record: 108 degrees. 
(NWS Louisville)
...1918...
A single bolt of lightning struck 504 sheep dead in their tracks at the
Wasatch National Forest in Utah. Sheep often herd together in storms, and
as a result the shock from the lightning bolt was passed from one animal to
another. (David Ludlum)
...1986...
Hurricane Estelle passed 120 miles south of the Hawaiian Islands creating a
ten to twenty foot surf. The large swells resulted from a combination of
high tides, a full moon, and 50 mph winds. The hurricane also deluged Oahu
Island with as much as 6.86 inches of rain on the 24th and 25th of the
month. (Storm Data)
...1987...
Barrow AK receives 1.38 inches in 24 hours on the 21st and 22nd, an
all-time record for that location. The average annual precipitation for
Barrow is just 4.75 inches. Thunderstorms in Montana produced 4 to 6 inches
of rain in Glacier County causing extensive flooding along Divide Creek.
Missoula MT received 1.71 inches of rain in 24 hours, a record for the
month of July. (The National Weather Summary) (The Weather Channel)
...1988...
Six cities in the south central U.S. reported record low temperatures for
the date, including Pueblo CO with a reading of 48 degrees. Thunderstorms
over the Atlantic Coast Region drenched Wilmington NC with 6.49 inches of
rain in about eight hours. (The National Weather Summary)
...1989...
Showers and thunderstorms prevailed across the southeastern third of the
country. Afternoon thunderstorms in Florida produced wind gusts to 86 mph
at Zephyrhills, and gusts to 92 mph at Carrollwood and Lutz. Thunderstorm
winds gusting to 69 mph at Crystal Lake damaged nineteen mobile homes.
(Storm Data) (The National Weather Summary)
...1995...
A Louisville man was slightly injured when lightning struck a utility pole 
and traveled through the phone lines into his living room. Lightning also 
damaged a house in Bardstown (Nelson County). (NWS Louisville)
========================================================================
Lexington Area  (ThreadEx Station)
Daily Almanac
Date: Jul 22, 2011

Daily Values         Observed    Normal       Record/Year    Prev Year
Max Temperature           -         86        102 in 1901          89
Min Temperature           -         67         50 in 1947          71
Avg Temperature           -         77       88.5 in 1983        80.0
Precipitation             -       0.15       2.35 in 1892        0.01
New Snowfall              -        0.0        0.0 in 2010+        0.0
Snow Depth                -          -          0 in 2010+          0
HDD (base 65)             -          0          4 in 1947           0
CDD (base 65)             -         12         24 in 1983          15

Month-To-Date        Observed    Normal       Record/Year    Prev Year
Avg Max Temperature    88.0       85.9       95.6 in 1936        87.6
Avg Min Temperature    68.3       66.1       59.8 in 1947        67.5
Avg Temperature        78.2       75.9       82.1 in 1936        77.5
Total Precipitation    3.88       3.49       9.56 in 1896        5.45
Total Snowfall          0.0        0.0        0.0 in 2011         0.0
Avg Snow Depth            0          -          0 in 2010           0
Total HDD                 0          1         10 in 1972           0
Total CDD               283        244        383 in 1936         282

+ indicates record also occurred in previous years (last occurrence listed).

This station's record may include data from more than one, possibly incompatible, 
locations. It reflects the longest available record for the Lexington Area.
Normals used in this product are from LEXINGTON BLUEGRASS AP

Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky