Gaithersburg, MD

12:48 AM EST on February 12, 2012 (GMT -0500)
Elev: 466 ft
Lon: 77.2° W
Lat: 39.1° N
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Active Advisory: Wind Advisory,  Special Statement (US Severe Weather) Active Notice: Public Information Statement
Tropical Weather: Tropical Cyclone Giovanna (South Indian Ocean) Tropical Cyclone Jasmine (Southern Pacific)
Weather Summary
Kari Kiefer
Weather Underground Forecast for Sunday, February 12, 2012.

The East dries out on Sunday, but wet weather continues moving through the West. A trough of low pressure advances eastward over the Great Basin and Central Rockies, producing moderate snow showers over Utah and Colorado. Winter weather advisories have been issued for parts of western Colorado as snowfall accumulations may reach from 6 to 8 inches by Sunday evening. Most of Utah, western Wyoming, and northern New Mexico should see lighter snow showers with accumulation around 1 to 2 inches. The tail end of this trough will extend into western Texas, bringing snow and freezing rain showers into northwestern Texas. Precipitation from this system will move into the Texas Panhandle late Sunday into Monday morning. Winter storm warnings have been issued for the region as 3 to 5 inches of snow are possible, with ice accumulations from 0.10 to 0.30 inches by Sunday evening. This will cause dangerous roads and travel conditions.

Meanwhile, another trough of low pressure and associated cold front approach the West Coast on Sunday. This system will reach the coasts of the Pacific Northwest and northern California in the afternoon and evening hours, bringing more rain showers. Temperatures will remain cool over most of the West Coast as this system pushes clouds and moisture onshore.

In the East, a strong ridge of high pressure allows for dry, sunny, and cool weather to persist. This system creates strong flow from the north, pushing cold air into the Plains and Eastern Valleys. Expect highs to range in the 20s in the Midwest, while the Ohio River Valley and Tennessee Valleys will see highs in the 30s. Freeze advisories have been issued for the Gulf states as low temperatures will drop into the 20s Sunday night. Dangerous fire conditions spread over the Southeastern states due to high pressure creating a very dry airmas with strong winds.
Weather Underground Forecast for Sunday, February 12, 2012.

The East dries out on Sunday, but wet weather continues moving through the West. A trough of low pressure advances eastward over the Great Basin and Central Rockies, producing moderate snow showers over Utah and Colorado. Winter weather advisories have been issued for parts of western Colorado as snowfall accumulations may reach from 6 to 8 inches by Sunday evening. Most of Utah, western Wyoming, and northern New Mexico should see lighter snow showers with accumulation around 1 to 2 inches. The tail end of this trough will extend into western Texas, bringing snow and freezing rain showers into northwestern Texas. Precipitation from this system will move into the Texas Panhandle late Sunday into Monday morning. Winter storm warnings have been issued for the region as 3 to 5 inches of snow are possible, with ice accumulations from 0.10 to 0.30 inches by Sunday evening. This will cause dangerous roads and travel conditions.

Meanwhile, another trough of low pressure and associated cold front approach the West Coast on Sunday. This system will reach the coasts of the Pacific Northwest and northern California in the afternoon and evening hours, bringing more rain showers. Temperatures will remain cool over most of the West Coast as this system pushes clouds and moisture onshore.

In the East, a strong ridge of high pressure allows for dry, sunny, and cool weather to persist. This system creates strong flow from the north, pushing cold air into the Plains and Eastern Valleys. Expect highs to range in the 20s in the Midwest, while the Ohio River Valley and Tennessee Valleys will see highs in the 30s. Freeze advisories have been issued for the Gulf states as low temperatures will drop into the 20s Sunday night. Dangerous fire conditions spread over the Southeastern states due to high pressure creating a very dry airmas with strong winds.
Weather Underground Broadcast Network
Gaithersburg Weather at a Glance
Updated 12:48 AM EST
Elevation
394 ft
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Now
Overcast
Overcast
Temperature
20.9 °F
Feels Like 21 °F
Wind(mph)
3.0
Sunrise / Set
7:04 AM
5:41 PM
Moon
Waning Gibbous
Tonight
Partly Cloudy 20 °F
Partly Cloudy
Sunday
Partly Cloudy 34 °F
Partly Cloudy
Sunday Night
Clear 20 °F
Clear
Monday
Clear 40 | 27 °F
Clear
Tuesday
Chance of Rain 41 | 32 °F
Chance of Rain
20% chance of precipitation
Wednesday
Mostly Cloudy 49 | 31 °F
Mostly Cloudy
Today is forecast to be nearly the same temperature as yesterday.
Conditions
Pressure
29.95 in
Visibility
2.0 miles
Clouds
Overcast 1400 ft
Moisture
Humidity
78%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KGAI 120535Z AUTO 34013G21KT 2SM OVC014 M07/M09 A2992 RMK AO1
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Windchill
21 °F
Dew Point
15 °F
Wind
Speed / Dir
3.0 mph from NNW
Wind Gust
7.0 mph
Health
UV
0 out of 16
Pollen
.40 out of 12
Pollen Forecast
Air Quality
Not available.
Flu Activity
Local Activity
View Flu Map
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Regional Forecast for Montgomery
Sunday
partlycloudy Mostly sunny and blustery. Highs in the lower 30s. Northwest winds 15 to 25 mph with gusts up to 40 mph.
Sunday Night
nt_sunny Mostly clear. Lows in the lower 20s. West winds 15 to 20 mph. Gusts up to 40 mph in the evening.
Monday
sunny Sunny. Highs in the lower 40s. West winds 10 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy in the evening...then becoming mostly cloudy. Lows in the upper 20s. West winds 5 to 10 mph...becoming northwest after midnight.
Tuesday
cloudy Cloudy. Highs in the lower 40s.
Tuesday Night
nt_cloudy Mostly cloudy. Lows in the lower 30s.
Wednesday
cloudy Mostly cloudy. Highs in the upper 40s.
Wednesday Night
nt_cloudy Mostly cloudy. Lows in the lower 30s.
Thursday
chancesnow Mostly cloudy with a chance of snow showers. Highs in the upper 40s. Chance of snow 30 percent.
Thursday Night
nt_snow Mostly cloudy with a chance of rain or snow showers. Lows in the upper 30s. Chance of precipitation 40 percent.
Friday
partlysunny Partly sunny. Highs in the upper 40s.
Friday Night
nt_sunny Mostly clear. Lows in the lower 30s.
Saturday
partlycloudy Mostly sunny. Highs in the upper 40s.
Source: NWS at 12:30 am EST on February 12, 2012
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Nowcast as of 10:49 PM EST on February 11, 2012
Light snow showers will continue across north central and northeastern Maryland...the northern Shenandoah Valley...and the Washington DC metropolitan area through midnight. The snow will be tapering off along the Pennsylvania border...after leaving behind a quarter to half inch of fresh snow. Gusty winds of 30 to 40 mph...with occasional gusts to 50 mph will temporarily reduce visibilities in the heavier snow showers. Wind chill values will also drop well into the teens and 20s.
Wind Advisory in effect until 7 am EST this morning...
Forecast
View Calendar 7-Day Weather Forecast for 20877
Sunday, 12
Partly Cloudy
34 | 20 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 13
Clear
40 | 27 °F
Clear
Chance of
Precipitation
0%
Tuesday, 14
Chance of Rain
41 | 32 °F
Chance of Rain
Chance of
Precipitation
20%
Wednesday, 15
Mostly Cloudy
49 | 31 °F
Mostly Cloudy
Chance of
Precipitation
10%
Thursday, 16
Chance Rain
49 | 38 °F
Chance Rain
Chance of
Precipitation
20%
Friday, 17
Chance of Rain
49 | 31 °F
Chance of Rain
Chance of
Precipitation
20%
Saturday, 18
Partly Cloudy
49 | NA
Partly Cloudy
Chance of
Precipitation
10%
Source: NWS at 12:30 am EST on February 12, 2012
Regional Forecast for Montgomery
Overnight
nt_chancesnow Snow showers likely. Little or no snow accumulation. Blustery with lows around 20. Northwest winds 20 to 25 mph with gusts up to 50 mph. Chance of snow 70 percent.
Sunday
partlycloudy Mostly sunny and blustery. Highs in the lower 30s. Northwest winds 15 to 25 mph with gusts up to 40 mph.
Sunday Night
nt_sunny Mostly clear. Lows in the lower 20s. West winds 15 to 20 mph. Gusts up to 40 mph in the evening.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 22 | 5 30 | 7 30 | 10 25 | 13
Wind 16 mph NW 20 mph WNW 16 mph WNW 10 mph WNW
Humidity 48% 37% 43% 61%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 26% 35% 25% 15%
Conditions Partly Cloudy Partly Cloudy Clear Clear
Sunrise & Sunset
7:04 AM
5:41 PM
Source: NWS at 12:30 am EST on February 12, 2012
Regional Forecast for Montgomery
Monday
sunny Sunny. Highs in the lower 40s. West winds 10 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy in the evening...then becoming mostly cloudy. Lows in the upper 20s. West winds 5 to 10 mph...becoming northwest after midnight.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 23 | 13 36 | 13 37 | 16 31 | 17
Wind 6 mph West 12 mph WNW 7 mph West 3 mph West
Humidity 63% 40% 41% 54%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 11% 7% 7% 42%
Conditions Clear Clear Clear Partly Cloudy
Sunrise & Sunset
7:03 AM
5:43 PM
Source: NWS at 12:30 am EST on February 12, 2012
Regional Forecast for Montgomery
Tuesday
cloudy Cloudy. Highs in the lower 40s.
Tuesday Night
nt_cloudy Mostly cloudy. Lows in the lower 30s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 30 | 20 39 | 26 39 | 30 36 | 29
Wind 0 mph NNW 4 mph South 4 mph South 1 mph South
Humidity 66% 59% 71% 78%
Chance of Precip. 10% 20% 20% 20%
Cloud Cover 73% 93% 86% 73%
Conditions Mostly Cloudy Overcast Chance of Rain Mostly Cloudy
Sunrise & Sunset
7:02 AM
5:44 PM
Source: NWS at 12:30 am EST on February 12, 2012
Regional Forecast for Montgomery
Wednesday
cloudy Mostly cloudy. Highs in the upper 40s.
Wednesday Night
nt_cloudy Mostly cloudy. Lows in the lower 30s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 34 | 29 45 | 33 42 | 34 37 | 32
Wind 0 mph NE 3 mph North 2 mph NNW 1 mph NNE
Humidity 81% 64% 73% 84%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 85% 76% 76% 66%
Conditions Mostly Cloudy Mostly Cloudy Mostly Cloudy Partly Cloudy
Sunrise & Sunset
7:00 AM
5:45 PM
Source: NWS at 12:30 am EST on February 12, 2012
Regional Forecast for Montgomery
Thursday
chancesnow Mostly cloudy with a chance of snow showers. Highs in the upper 40s. Chance of snow 30 percent.
Thursday Night
nt_snow Mostly cloudy with a chance of rain or snow showers. Lows in the upper 30s. Chance of precipitation 40 percent.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 34 | 29 45 | 35 45 | 39 42 | 41
Wind 2 mph ENE 5 mph ESE 6 mph South 4 mph South
Humidity 84% 68% 83% 83%
Chance of Precip. 10% 10% 20% 20%
Cloud Cover 34% 54% 92% 86%
Conditions Partly Cloudy Chance of Snow Chance of Rain Chance of Rain
Sunrise & Sunset
6:59 AM
5:46 PM
Source: NWS at 12:30 am EST on February 12, 2012
Regional Forecast for Montgomery
Friday
partlysunny Partly sunny. Highs in the upper 40s.
Friday Night
nt_sunny Mostly clear. Lows in the lower 30s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 37 46 | 30 42 | 27 37 | 25
Wind 6 mph SW 9 mph WNW 7 mph WNW 4 mph WNW
Humidity 88% 54% 54% 63%
Chance of Precip. 30% 30% 30% 30%
Cloud Cover 77% 50% 50% 23%
Conditions Chance of Rain Chance of Rain Chance of Rain Clear
Sunrise & Sunset
6:59 AM
5:46 PM
Source: NWS at 12:30 am EST on February 12, 2012
Regional Forecast for Montgomery
Saturday
partlycloudy Mostly sunny. Highs in the upper 40s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 34 | 25 45 | 25 44 | 27 37 | 25
Wind 4 mph WNW 7 mph WNW 5 mph WNW 4 mph WNW
Humidity 66% 44% 53% 63%
Chance of Precip. 10% 10% 10% 30%
Cloud Cover 23% 25% 34% 23%
Conditions Clear Clear Partly Cloudy Clear
Sunrise & Sunset
6:59 AM
5:46 PM
BestForecast (what's this?)
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
February 12, 2012 Max Temp Min Temp
Normal (KIAD) 45 °F 23 °F
Record (KIAD) 74 °F (1999) 3 °F (1964)
Yesterday 42 °F 21 °F
Yesterday's Heating Degree Days: 33
Choose a date
Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
More information at USGS.gov
Coastal Water Temperatures
Place Temperature
Washington, DC 43.0 °F
Baltimore, MD 42.1 °F
Solomons Island, MD 43.0 °F
Marine Forecast
Astronomy
Feb. 12, 2012 Rise Set
Actual Time 7:04 AM EST 5:41 PM EST
Civil Twilight 6:36 AM EST 6:09 PM EST
Nautical Twilight 6:05 AM EST 6:41 PM EST
Astronomical Twilight 5:34 AM EST 7:12 PM EST
Moon 11:34 PM EST 9:24 AM EST
Length Of Visible Light 11h 32m
Length of Day
10h 37m
Tomorrow will be 2m 20s longer.
Waning Gibbous, 77% of the Moon is Illuminated
Today
Waning Gibbous
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter
Mar 8
Full
Visit Astronomy
Today's Extremes
State Highs State Lows
45 °F
Salisbury
44 °F
Patuxent River
43 °F
Ocean City
42 °F
Maryland Science Center
41 °F
Baltimore
19 °F
Hagerstown
24 °F
Gaithersburg
24 °F
Baltimore
26 °F
Patuxent River
26 °F
Ocean City
Source: NWS
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
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Aviation
City Temp. Conditions Updated
Gaithersburg 19 °F Overcast 12:35 AM EST
College Park This station is not reporting.
Dulles Airport 21 °F Light Snow 12:14 AM EST
Leesburg 23 °F Overcast 12:35 AM EST
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Flight To ETA Status
TAI590
San Salvador 		KIAD 12:49AM On Time
JBU300
Long Beach, CA 		KIAD 04:39AM On Time
UAL846
Ezeiza, Buenos Aires Province 		KIAD 06:17AM On Time
UAL860
Sao Paulo 		KIAD 06:41AM On Time
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Type Condition
Flight Rule: IFR (KGAI)
Wind Speed: 13.0 kts.
Wind Dir: 333° (NNW)
Ceiling: 1400 ft

METAR KGAI 120535Z AUTO 34013G21KT 2SM OVC014 M07/M09 A2992 RMK AO1

View all Reports & Maps
Nearby Events
Event Date Forecast
Leif Ove Andsnes 7:00 PM EST 2012-02-12 Clear, 28°F
Yasmin Levy 8:00 PM EST 2012-02-14 Mostly Cloudy, 36°F
TD Bank Speed Networking at Montgomery Community Media 7:00 AM EST 2012-02-14 Mostly Cloudy, 28°F
Emerson String Quartet 7:00 PM EST 2012-02-15 Partly Cloudy, 43°F
February 15: Customer Service Superstars Training 10:00 AM EST 2012-02-15 Clear, 41°F
MCJUG 02/15/2012 Meeting 6:00 PM EST 2012-02-15 Clear, 44°F
Event data courtesy eviesays.com
Sports
Event Date Forecast
Budweiser Shootout 8:29 PM EST on February 18, 2012 Partly Cloudy, 63 °F
Gatorade Duel 1 2:19 PM EST on February 23, 2012 Average High 70° F/ 21° C
Event Date Forecast
AT&T Pebble Beach National Pro-Am 8:30 AM PST on February 12, 2012 Mostly Cloudy, 45 °F
Northern Trust Open 8:30 AM PST on February 16, 2012 Clear, 63 °F
AT&T National 8:30 AM EDT on June 28, 2012 Average High 86° F/ 29° C
AT&T National 8:30 AM EDT on June 29, 2012 Average High 87° F/ 30° C
View all Sports Weather
Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
MDDOT I-270 @ I-370, Gaithersburg, MD 20 °F 9 °F 14 °F 78% WSW  at  10 mph 0.01 in / hr 449 ft 12:30 AM EST MADIS
Muddy Branch Park, Gaithersburg, MD 20.9 °F 21 °F 15 °F 78% NNW  at  3.0 mph 0.00 in / hr 394 ft 12:48 AM EST Rapid Fire  
Kentlands, Gaithersburg, MD 20.8 °F 12 °F 11 °F 66% SSW  at  7.6 mph 0.00 in / hr 380 ft 12:48 AM EST Rapid Fire  
Avalon at Traville, North Potomac, MD 20.9 °F 14 °F 13 °F 70% West  at  4.9 mph 0.00 in / hr 422 ft 12:48 AM EST Rapid Fire  
Woodley Gardens, Rockville, MD 19.5 °F 11 °F 14 °F 80% West  at  6.0 mph 0.00 in / hr 451 ft 12:45 AM EST Normal
Montgomery Village, MD 22.3 °F 22 °F 10 °F 59% North  at  - - / hr 350 ft 11:44 PM EST Rapid Fire
Gaithersburg, MD 19.2 °F 13 °F 16 °F 88% North  at  4.0 mph 0.00 in / hr 467 ft 12:36 AM EST Normal  
Longhorn, Gaithersburg, MD 20.5 °F 20 °F 9 °F 61% NNW  at  2.0 mph 0.00 in / hr 432 ft 12:45 AM EST Normal
Cloppers Mill East, Germantown, MD 22.8 °F 17 °F 11 °F 60% NW  at  4.8 mph 0.00 in / hr 315 ft 12:48 AM EST Rapid Fire
Potomac Woods, Rockville, MD 19.6 °F 20 °F 11 °F 69% West  at  0.0 mph 0.00 in / hr 453 ft 12:48 AM EST Rapid Fire  
Flower Valley, Rockville, MD 20.8 °F 7 °F 14 °F 75% North  at  14.8 mph 0.00 in / hr 347 ft 12:42 AM EST Normal  
Manor Ridge, Gaithersburg, MD 19.0 °F 19 °F 13 °F 78% SW  at  0.0 mph 0.00 in / hr 575 ft 12:48 AM EST Rapid Fire
Cherrywood, Olney, MD 20.1 °F 10 °F 17 °F 88% NW  at  8.0 mph 0.00 in / hr 522 ft 12:42 AM EST Normal  
Laytonsville, MD 19.5 °F 4 °F 15 °F 82% NW  at  20.0 mph 0.00 in / hr 600 ft 12:47 AM EST Normal  
North Germantown, Germantown, MD 20.7 °F 9 °F 8 °F 57% WSW  at  10.5 mph 0.00 in / hr 439 ft 12:48 AM EST Rapid Fire
The Vistas, Boyds, MD 21.4 °F 6 °F 9 °F 58% NNW  at  20.0 mph 0.00 in / hr 460 ft 12:48 AM EST Rapid Fire
APRSWXNET Bethesda MD , Washington, DC 20 °F 14 °F 14 °F 78% WNW  at  4 mph 0.00 in / hr 403 ft 12:28 AM EST MADIS
Brookeville Farms, Brookeville, MD 19.8 °F 7 °F 16 °F 84% NNW  at  13.6 mph 0.00 in / hr 390 ft 12:48 AM EST Rapid Fire  
Gateway Center, Clarksburg, MD 19.4 °F 12 °F 13 °F 77% WNW  at  5.0 mph 0.00 in / hr 583 ft 12:44 AM EST Normal  
Park Ridge, Clarksburg, MD 19.4 °F 6 °F 14 °F 80% WNW  at  13.9 mph - / hr 623 ft 12:42 AM EST Normal  
Cedar Ridge, Laytonsville, MD 20.2 °F 12 °F 16 °F 84% NW  at  6.0 mph 0.00 in / hr 620 ft 12:47 AM EST Normal  
Kensington, Kensington, MD 20.7 °F 21 °F 18 °F 85% South  at  0.0 mph 0.00 in / hr 381 ft 12:45 AM EST Normal  
APRSWXNET Great Falls V, Great Falls, VA 20 °F 12 °F 17 °F 87% NNE  at  6 mph 0.00 in / hr 296 ft 12:34 AM EST MADIS
Wheaton, Silver Spring, MD 21.4 °F 17 °F 15 °F 75% North  at  3.4 mph 0.00 in / hr 350 ft 12:48 AM EST Rapid Fire  
APRSWXNET Great Falls VA , Great Falls, VA 18 °F 18 °F 16 °F 90% North  at  - 0.00 in / hr 380 ft 12:22 AM EST MADIS
Triadelphia Reservoir, Brookeville, MD 20.2 °F 13 °F 14 °F 78% North  at  5.0 mph 0.00 in / hr 100 ft 12:32 AM EST Normal
MDDOT I-495 @ Connecticut Ave, Bethesda, MD 22 °F 22 °F 18 °F 84% WSW  at  0 mph 0.00 in / hr 230 ft 12:31 AM EST MADIS
North Springbrook, Colesville, MD 19.0 °F 19 °F 18 °F 97% WNW  at  3.0 mph 0.00 in / hr 315 ft 12:46 AM EST Rapid Fire  
Damascus Valley Park, Damascus, MD 19.8 °F 20 °F 15 °F 82% NNW  at  0.9 mph 0.00 in / hr 764 ft 12:40 AM EST Rapid Fire  
Kemp Mill, Silver Spring, MD 20.1 °F 16 °F 19 °F 95% WNW  at  3.1 mph 0.00 in / hr 270 ft 12:47 AM EST Rapid Fire  
Hickory Creek, Great Falls, VA 19.5 °F 20 °F 16 °F 85% WNW  at  1.0 mph 0.00 in / hr 350 ft 12:48 AM EST Rapid Fire
Kemp Mill/Silver Spring, Silver Spring, MD 20.4 °F 6 °F 17 °F 86% NNE  at  18.0 mph 0.00 in / hr 400 ft 12:47 AM EST Rapid Fire
APRSWXNET Great Falls VA , Sterling, VA 19 °F 19 °F 16 °F 88% NW  at  2 mph 0.00 in / hr 321 ft 12:22 AM EST MADIS
APRSWXNET Silver Spring MD , Silver Spring, MD 21 °F 21 °F 18 °F 87% North  at  2 mph 0.00 in / hr 347 ft 12:15 AM EST MADIS
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Wind Advisory
Mobile & Email Alerts Statement as of 9:41 PM EST on February 11, 2012

... Wind Advisory remains in effect until 7 am EST Sunday...

* timing... overnight. Winds will begin to diminish toward dawn.

* Winds... northwest 20 to 30 mph with gusts up to 50 mph.

Precautionary/preparedness actions...

A Wind Advisory means that winds of 35 mph are expected. Winds
this strong can make driving difficult... especially for high
profile vehicles. Use extra caution.





Special Statement
Mobile & Email Alerts Statement as of 11:04 PM EST on February 11, 2012

... One last round of snow showers tonight...

An upper level disturbance will be pivoting through the Baltimore
Washington area overnight... providing snow to the region. The snow
will be ending across northern Maryland by midnight... affecting
Metro Washington and the northern Shenandoah Valley through 1am...
and reaching southern Maryland and the northern Piedmont of Virginia
between midnight and 2 am.

Look for a quick inch of snow with this disturbance. Roads may be
snow covered and slick if left untreated. Motorists should
exercise caution on the roads tonight.


Public Information Statement
Mobile & Email Alerts Statement as of 12:14 am EST on February 12, 2012

The following are unofficial observations taken during the past 26
hours for the storm that has been affecting our region. Appreciation
is extended to Highway departments... cooperative observers... Skywarn
spotters and media for these reports. This summary is also available
on our home Page at weather.Gov/Baltimore

********************storm total snowfall********************

Location storm total time/date comments
                     snowfall of
                     /inches/ measurement

Maryland

... Allegany County...
   1 NNW Frostburg 1.2 542 PM 2/11 co-op observer

... Anne Arundel County...
   Severn 0.3 700 am 2/11 trained spotter
   BWI Airport T 100 PM 2/11 Airport

... Baltimore County...
   2 NW Long Green 2.3 900 PM 2/11 trained spotter
   1 ESE Glyndon 1.6 901 am 2/11 trained spotter
   1 E Oella 1.0 715 am 2/11 trained spotter
   1 se Garrison 1.0 900 am 2/11 trained spotter
   1 NE Kingsville 0.8 600 am 2/11 trained spotter
   Hunt Valley 0.5 800 am 2/11 broadcast media

... Baltimore City...
   Pimlico 0.5 848 am 2/11 trained spotter

... Carroll County...
   1 SSW Manchester 3.9 1055 PM 2/11 trained spotter
   3 WSW Lineboro 1.2 1035 PM 2/11 trained spotter
   4 NE Millers 1.2 245 am 2/11 co-op observer
   1 W Westminster 1.0 700 am 2/11 public

... Howard County...
   2 N Columbia 1.0 700 am 2/11 trained spotter
   1 SSE Simpsonville 1.0 615 am 2/11 trained spotter

... Montgomery County...
   2 WSW Damascus 2.7 1158 PM 2/11 co-op observer
   5 N Laytonsville 2.5 400 PM 2/11 broadcast media
   3 E Clarksburg 0.7 902 am 2/11 trained spotter
   1 SSE Colesville 0.5 1145 PM 2/11 this evening only

... Washington County...
   1 WSW Cavetown 1.5 359 PM 2/11 trained spotter

Virginia

... Arlington County...
   Reagan National airp 0.2 1209 am 2/12 Airport

... City of Winchester...
   2 S Winchester 1.0 345 am 2/11 trained spotter

... Clarke County...
   1 NNW Berryville 0.6 735 PM 2/11 trained spotter

... Fairfax County...
   1 NNE Herndon 0.6 700 am 2/11 NWS employee
   1 E Oakton 0.5 600 am 2/11 trained spotter
   2 ESE Chantilly 0.4 1208 am 2/12 NWS employee

... Fauquier County...
   Warrenton 0.1 245 PM 2/11 NWS employee

... Frederick County...
   2 ESE Stephens City 0.6 415 am 2/11 trained spotter

... King George County...
   King George 0.3 430 PM 2/11 trained spotter

... Loudoun County...
   1 NNE Dulles interna 1.2 1200 am 2/12 ASOS
   Countryside 0.7 751 am 2/11 NWS employee
   3 NNW Dulles interna 0.6 235 PM 2/11 NWS employee
   Leesburg 0.6 300 am 2/11 public
   Dulles international 0.6 235 PM 2/11 Airport
   3 NW Dulles internat 0.4 500 am 2/11 NWS office

... Prince William County...
   3 NNW Woolsey 1.1 859 am 2/11 trained spotter

... Warren County...
   2 N Linden 1.1 858 am 2/11 trained spotter
   1 WSW Karo 0.5 700 am 2/11 trained spotter

West Virginia

... Berkeley County...
   1 WNW Bunker Hill 1.2 233 PM 2/11 cocorahs

... Grant County...
   Bayard 7.1 720 PM 2/11 co-op observer
   1 E Bismarck 0.1 550 PM 2/11 public

... Jefferson County...
   1 ENE Charles Town 1.0 147 PM 2/11 trained spotter

... Pendleton County...
   6 WSW Cherry Grove 5.0 541 PM 2/11 trained spotter
   2 S Seneca Rocks 0.5 600 PM 2/11 public


***********************peak wind gust***********************

Location Max wind time/date comments
                        gust of
                         mph measurement

Maryland

... Anz533...
   3 E Calvert Cliffs 46 948 PM 2/11 buoy

... Anz537...
   2 WSW Piney Point 53 712 PM 2/11 mesonet
   2 se Cobb Island 47 705 PM 2/11 buoy
   7 SSE Saint George I 46 930 PM 2/11 buoy

... Baltimore County...
   1 WSW Arbutus 46 713 PM 2/11 mesonet

... Frederick County...
   2 SW Flint 53 709 PM 2/11 AWOS
   1 ENE ballenger cree 46 545 PM 2/11 mesonet

... Montgomery County...
   2 se Gaithersburg 46 750 PM 2/11 mesonet

... St. Marys County...
   Point Lookout 48 805 PM 2/11 buoy
   2 ENE Patuxent River 45 436 PM 2/11 AWOS

... Washington County...
   1 E Hagerstown 46 345 PM 2/11 mesonet

Virginia

... Arlington County...
   1 E Cherrydale 53 821 PM 2/11 mesonet
   1 S Reagan National 44 307 PM 2/11 ASOS

... Augusta County...
   3 WSW Moscow 46 230 PM 2/11 mesonet

... Fairfax County...
   1 ESE Newington 47 839 PM 2/11 AWOS

... King George County...
   3 NE Dahlgren 51 847 PM 2/11 mesonet

... Loudoun County...
   2 SSW Leesburg 51 955 PM 2/11 AWOS
   1 NNE Dulles interna 49 722 PM 2/11 ASOS
   2 ENE Lovettsville 47 718 PM 2/11 mesonet


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