Weather


Washington, District of Columbia

National Weather Service: Freeze Watch

Current Conditions

 
Temp: 52°
Dew Point: 28°
Humidity: 40%
Wind: WNW 8 mph
Visibility: 10.0 miles
Pressure: 30.17 in. +
Sky: Partly Cloudy

 

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Almanac

Average High: 61°

Average Low: 43°

Record high/year: 81° (2003)

Record low/year: 20° (1879)

Sunrise: 6:39 AM

Sunset: 5:02 PM

Detailed History

Sun and Moon

Sunrise: 06:39 AM (EST)

Moon Rise: 07:15 PM (EST) 11 5

Sunset: 05:02 PM (EST)

Moon Set: 09:54 AM (EST) 11 5

Moon Phase

Today
Nov. 09
Nov. 16
Nov. 24
Dec. 02

 

Local Radar

Local Satellite


Air Pollution

Air Pollution Forecast for Washington

Current Air Quality: Good Pollutant: PM2.5
Current Air Quality: Good Pollutant: OZONE
Thu Air Quality: Good Pollutant: PM2.5
Fri Air Quality: Good Pollutant: PM2.5
Sat Air Quality: Good Pollutant: PM2.5
Sun Air Quality: Good Pollutant: PM2.5

Next 12 Hours

 
8  pm
11  pm
2  am
5  am
8  am
Rain Showers Rain Showers
Clear Clear
Clear Clear
Clear Clear
Clear Clear
47°
43°
40°
36°
38°

 

Forecast data from the National Digital Forecast Database


5-Day Forecast

Friday Clear Hi 52° Lo 34° Clear
Saturday Clear Hi 59° Lo 41° Clear
Sunday Clear Hi 67° Lo 45° Clear
Monday Partly Cloudy Hi 67° Lo 49° Partly Cloudy
Tuesday Chance of Rain Hi 65° Lo 45° Chance of Rain

 

Forecast for District of Columbia

Updated: 7:34 PM EST on November 5, 2009
Freeze watch in effect from late Friday night through Saturday morning...

Tonight

Partly cloudy with isolated rain showers this evening... then mostly clear after midnight. Lows in the mid 30s. Northwest winds 10 to 15 mph. Chance of rain 20 percent.

 

Friday

Sunny. Highs in the lower 50s. Northwest winds 10 to 15 mph.

 

Friday Night

Mostly clear. Lows in the mid 30s. North winds around 5 mph in the evening...becoming light and variable.

 

Saturday

Sunny. Highs around 60. South winds around 5 mph... increasing to around 10 mph in the afternoon.

 

Saturday Night

Mostly clear. Lows in the lower 40s. Southwest winds around 5 mph.

 

Sunday

Sunny. Highs in the upper 60s.

 

Sunday Night

Mostly clear. Lows in the mid 40s.

 

Monday

Sunny. Highs in the upper 60s.

 

Monday Night

Partly cloudy. Lows in the upper 40s.

 

Tuesday

Partly sunny. Highs in the mid 60s.

 

Tuesday Night

Mostly cloudy. Lows in the mid 40s.

 

Veterans Day

Mostly sunny. Highs in the upper 50s.

 

Wednesday Night

Partly cloudy. Lows in the lower 40s.

 

Thursday

Mostly sunny. Highs in the upper 50s.

 

 

 Freeze Watch  Statement as of 2:56 PM EST on November 5, 2009


... Freeze watch in effect from late Friday night through Saturday
morning...

The National Weather Service in Sterling Virginia has issued a
freeze watch... which is in effect from late Friday night through
Saturday morning.

High pressure will build over the region Friday night. The
combination of clear skies... dry air and calm winds will allow
temperatures to potentially fall to sub-freezing levels late
Friday night and early Saturday morning in the watch area. The
watch area includes the greater Washington DC... Fredericksburg and
Baltimore Metro areas along with lower southern Maryland.

Precautionary/preparedness actions...

A freeze watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.









Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Eckington Pl, NE, Washington, DC

Updated: 8:24 PM EST

Temperature: 51.3 °F Dew Point: 34 °F Humidity: 52% Wind: West at 6.0 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: DCNet DC Municipal Building Washington DC, Washington, DC

Updated: 8:00 PM EST

Temperature: 51 °F Dew Point: 30 °F Humidity: 45% Wind: WNW at 6 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: DCNet Hoover Building Washington DC, Washington, DC

Updated: 8:00 PM EST

Temperature: 53 °F Dew Point: 31 °F Humidity: 42% Wind: WNW at 7 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: DCNet Forrestal Building Washington DC, Washington, DC

Updated: 8:00 PM EST

Temperature: 52 °F Dew Point: 30 °F Humidity: 42% Wind: WNW at 7 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: DCNet Natl. Academy of Sciences Washington DC, Washington, DC

Updated: 8:00 PM EST

Temperature: 53 °F Dew Point: 30 °F Humidity: 42% Wind: WNW at 5 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: NOS_PORTS Washington, DC, Washington, DC

Updated: 7:54 PM EST

Temperature: 53 °F Dew Point: - Humidity: - Wind: NW at 7 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: DCNet National Arboretum Washington DC, Washington, DC

Updated: 8:00 PM EST

Temperature: 51 °F Dew Point: 30 °F Humidity: 45% Wind: WNW at 3 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: VADOT Rt_66_@_Rosslyn, Arlington, VA

Updated: 7:40 PM EST

Temperature: 52 °F Dew Point: 29 °F Humidity: 41% Wind: South at 6 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: DCNet Navy Annex Washington DC, Washington, DC

Updated: 8:00 PM EST

Temperature: 51 °F Dew Point: 28 °F Humidity: 40% Wind: WNW at 3 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: Cherrydale, Arlington, VA

Updated: 8:20 PM EST

Temperature: 49.5 °F Dew Point: 30 °F Humidity: 47% Wind: NW at 2.0 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 50 °F Historical Graphs

Location: APRSWXNET Arlington VA US, Arlington, VA

Updated: 8:03 PM EST

Temperature: 50 °F Dew Point: 32 °F Humidity: 49% Wind: West at 5 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 48 °F Historical Graphs

Location: Del Ray, Alexandria, VA

Updated: 8:24 PM EST

Temperature: 51.5 °F Dew Point: 32 °F Humidity: 48% Wind: Calm Pressure: 30.12 in Hourly Precipitation: - Windchill: - Historical Graphs

Location: DCNet NOAA Building Silver Spring MD, Silver Spring, MD

Updated: 8:00 PM EST

Temperature: 49 °F Dew Point: 30 °F Humidity: 48% Wind: WNW at 10 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 45 °F Historical Graphs

Location: Barcroft Neighborhood, Arlington, VA

Updated: 8:20 PM EST

Temperature: 46.2 °F Dew Point: 33 °F Humidity: 59% Wind: Calm Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 46 °F Historical Graphs

Location: DCNet Naval Research Laboratory Washington DC, Washington, DC

Updated: 8:00 PM EST

Temperature: 51 °F Dew Point: - Humidity: 36% Wind: NW at 11 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: Arlington, VA

Updated: 8:20 PM EST

Temperature: 48.0 °F Dew Point: 32 °F Humidity: 54% Wind: NNW at 2.0 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 48 °F Historical Graphs

Location: Rosemont Park, Alexandria, VA

Updated: 8:24 PM EST

Temperature: 49.6 °F Dew Point: 32 °F Humidity: 51% Wind: SW at 1.2 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: 50 °F Historical Graphs

Location: North Hills, Silver Spring, MD

Updated: 8:21 PM EST

Temperature: 47.5 °F Dew Point: 35 °F Humidity: 61% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Windchill: 48 °F Historical Graphs

Location: Episcopal High School, Alexandria, VA

Updated: 8:20 PM EST

Temperature: 50.4 °F Dew Point: 22 °F Humidity: 33% Wind: WNW at 3.0 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: VADOT Seminary_Rd_@_I-395, Alexandria, VA

Updated: 7:55 PM EST

Temperature: 52 °F Dew Point: 27 °F Humidity: 38% Wind: NW at 5 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: Langley Fork Park, McLean, VA

Updated: 8:24 PM EST

Temperature: 45.8 °F Dew Point: 31 °F Humidity: 57% Wind: Calm Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 46 °F Historical Graphs

Location: Camp Springs, MD, Camp Springs, MD

Updated: 8:00 PM EST

Temperature: 50.4 °F Dew Point: 29 °F Humidity: 44% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: APRSWXNET McLean VA US, McLean, VA

Updated: 6:28 PM EST

Temperature: 49 °F Dew Point: 37 °F Humidity: 62% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.00 in Windchill: 49 °F Historical Graphs

Location: Hollywood, College Park, MD

Updated: 8:24 PM EST

Temperature: 48.1 °F Dew Point: 35 °F Humidity: 61% Wind: NE at 1.1 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 48 °F Historical Graphs

Location: Kemp Mill/Silver Spring, Silver Spring, MD

Updated: 8:20 PM EST

Temperature: 48.5 °F Dew Point: 30 °F Humidity: 49% Wind: North at 4.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Windchill: 47 °F Historical Graphs

Location: APRSWXNET Westlawn VA US, Falls Church, VA

Updated: 8:01 PM EST

Temperature: 50 °F Dew Point: 27 °F Humidity: 41% Wind: NW at 1 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

Location: APRSWXNET Bethesda MD US, Washington, DC

Updated: 6:28 PM EST

Temperature: 48 °F Dew Point: 36 °F Humidity: 64% Wind: WNW at 1 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Windchill: 48 °F Historical Graphs

Location: High Point Homes, Beltsville, MD

Updated: 8:24 PM EST

Temperature: 48.8 °F Dew Point: 31 °F Humidity: 50% Wind: SW at 2.0 mph Pressure: 30.26 in Hourly Precipitation: 0.00 in Windchill: 49 °F Historical Graphs

Location: Alexandria, VA

Updated: 8:23 PM EST

Temperature: 52.3 °F Dew Point: -16 °F Humidity: 5% Wind: NW at 2.2 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: - Historical Graphs

MSN Maps of:

Temperature Dew Point Humidity Wind Pressure Hourly Precipitation -

NWS Forecaster Discussion




872 
fxus61 klwx 060015 
afdlwx 


Area forecast discussion 
National Weather Service Baltimore Maryland/Washington District of Columbia 
715 PM EST Thursday Nov 5 2009 


Synopsis... 
an upper level disturbance will continue to move off the middle 
Atlantic coast tonight. High pressure in place over the area Friday 
through early next week. Chilly temperatures are expected for 
tonight and Friday night...while a warming trend will begin over 
the weekend. 


&& 


Near term /until 7 am Friday morning/... 
500mb trough axis drifting east off the eastern Seaboard...taking the shortwave 
energy with it. Northwest flow has opened the fetch from Western Lake Erie to 
the Allegheny Front where snow showers are occurring /nrn half of 
Grant Colorado...western Mineral...and western Allegany co/. Up to a 
half inch of snow is possible above 2500 feet elevation...mainly 
before midnight. 


Scattered clouds pushing east of the Allegheny Front to dissipate 
through the night...resulting in mostly clear skies /all clear 
south of kshd-kcho line/. Middle to upper 30s tonight east of the 
Blue Ridge...though dew points remain low enough to not allow for 
frost development. Strong northwest flow along to keep surface somewhat 
coupled through the midnight hour. 




Short term /7 am Friday morning through 6 PM Friday/... 
high pressure will build eastward over the County warning forecast area during the day 
tomorrow. Any lingering cloudiness from middle level shortwave energy 
will decrease in the morning. 


Took a blend of mav/met MOS numbers for maximum T. 


&& 


Long term /Friday night through Thursday/... 
a pattern change is in store behind the departing upper low over eastern 
Canada. Upper ridge and surface hipres will build across the eastern 
Seaboard...lasting through the beginning of next week. 
Accordingly...long term period will feature mainly quiet and dry 
conditions with upper ridge. 


Surface hipres will move ovrhd Friday night. Under clring skies...calm winds 
and a dry airmass in place...temperatures should effectively radiate into 
the upper 20s along and west of the Blue Ridge...lm30s east of the mts. 
Have issued a freeze watch for most counties along and east of I-95 
where the growing season has not ended yet. At this time the highest 
confidence for a killing freeze is in the northestern Maryland and the northern 
Piedmont of Virginia. However if temperatures drop only a few degrees cooler than 
currently forecasted...a killing freeze could occur across the remaining 
areas under a freeze watch. 


Near normal temperatures Sat will moderate a bit sun into early next week as 
southerly return flow develops around hipres. Next chance for precipitation 
appears to be midweek as a cold front approaches. Chances appear 
low at this time. 


&& 


Aviation /00z Friday through Tuesday/... 
occasional gusts in the 20 to 25 knots range with strong northwest flow 
aloft as an upper trough pushes off the middle Atlantic coast. Ewinds 
will remain northwest during the day tomorrow...with strong gusts around 
25 knots early morning as surface recouples. Sustained wind speeds then 
decrease midday through the afternoon...clear conditions Friday. 


VFR conditions expected this weekend into early next week as hipres 
controls the weather pattern. 


&& 


Marine... 
Gale Warning in effect for lower tidal Potomac and all of the Bay 
and tributaries through the night. The majority of gusts are 
expected in the 25 to 30 knots range...but gusts to 35 knots are 
possible through the rest of the night. Winds to begin to diminish 
early Friday morning...but small craft conditions will remain 
likely through the day. 


Pressure gradient will weaken Friday night as hipres settles ovrhd. Winds 
should will remain light through the weekend and early next week. 


&& 


Lwx watches/warnings/advisories... 
District of Columbia...freeze watch from late Friday night through Saturday morning 
for dcz001. 
Maryland...freeze watch from late Friday night through Saturday morning 
for mdz006-007-011-013-014-016>018. 
Virginia...freeze watch from late Friday night through Saturday morning 
for vaz054>057. 
WV...none. 
Marine...Small Craft Advisory until 6 PM EST Friday for anz535-536. 
Small Craft Advisory from 6 am to 6 PM EST Friday for 
anz530>534-537>543. 
Gale Warning until 6 am EST Friday for anz530>534-537>543. 


&& 


$$ 
Update...baj 
previous discussion...nwl/jrk 






















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