Winter storm watches, warnings, and advisories are issued by local National Weather Service Forecast offices.
Winter weather advisory -- When a significant winter storm or hazardous winter weather is occurring, imminent, and is an inconvenience.
Winter storm watch -- A significant winter weather (i.e., heavy snow, heavy sleet, significant freezing rain, or a combination of events) is expected, but not imminent, for the watch area; provides 12 to 36 hours notice of the possibility of severe winter weather.
Winter storm warning -- A significant winter storm or hazardous winter weather is occurring, imminent, or likely, and is a threat to life and property.
Blizzard warning -- Winds that are at least 35 mph or greater, blowing snow that will frequently reduce visibility to 1/4 mile or less for at least three hours, and dangerous wind chills are expected in the warning area.
Wind chill index -- The calculation of temperature that takes into consideration the effects of wind and temperature on the human body. This is not the actual air temperature, but what it feels like to the average person. This wind chill chart shows the difference between actual air temperature and perceived temperature, and the amount of time until frostbite occurs.
Wednesday, February 12, 2014, 6:19 PM EST
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Herndon, VA
County: Fairfax NWS Zone: VAZ053 (Fairfax) 6:19 PM EST (23:19 GMT) |
77.3873 W
38.9812 N Wed, Feb 12, 2014 |
| Type | Issue Time | Expire Time | Expires in |
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Wed, Feb 12, 3:08pm EST | Wed, Feb 12, 11:15pm EST | 4 hr, 55 min |
| Current Conditions | |||||||||||||||||||||||||||||||||||||
Observation for Dulles Airport, Chantilly, VA as of 5:52PM (27 min ago)
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| National Weather Service Forecast | |
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| Rest of this afternoon | Cloudy. Highs in the upper 20s. East winds around 10 mph. |
| Tonight | Snow. Snow may be heavy at times after midnight. Snow accumulation of 4 to 6 inches. Lows in the mid 20s. Northeast winds 10 to 15 mph. Chance of snow near 100 percent. |
| Thursday | Snow and sleet in the morning, then sleet, snow and rain in the afternoon. Additional snow and sleet accumulation of 2 to 4 inches. Highs in the mid 30s. North winds 15 to 20 mph. Chance of precipitation near 100 percent. |
| Thursday night | Mostly cloudy. Snow likely or rain in the evening, then a chance of snow after midnight. Lows in the mid 20s. Northwest winds 15 to 20 mph. Chance of precipitation 80 percent. |
| Friday | Mostly sunny. Highs in the lower 40s. Southwest winds 5 to 10 mph. |
| Friday night | Mostly cloudy with a 30 percent chance of snow showers. Lows in the mid 20s. |
| Saturday | Mostly sunny. Highs in the mid 30s. |
| Saturday night | Mostly cloudy. Lows around 15. |
| Sunday | Partly sunny. Highs in the lower 30s. |
| Sunday night | Clear. Cold with lows around 10 above. |
| Washingtons birthday | Mostly sunny. Highs in the upper 30s. |
| Monday night | Cloudy with a 30 percent chance of snow. Not as cool with lows in the lower 30s. |
| Tuesday | Mostly cloudy with a chance of rain and snow showers. Highs in the upper 40s. Chance of precipitation 40 percent. |
| Area Conditions | Eng | |||||||
| Dist | Stn | City | Temp | Dew | Cond | Wind | Vis | Age |
| 5 mi | KIAD | Chantilly, VA | Cloudy | 27 | ||||
| 12 mi | KJYO | Leesburg, VA | Cloudy | 24 | ||||
| 20 mi | KHEF | Manassas, VA | Cloudy | 24 | ||||
| 21 mi | KDCA | Arlington, VA | Cloudy | 27 | ||||
| 21 mi | KDAA | Fort Belvoir, VA | Mostly cloudy | 81 | ||||
| 30 mi | KFDK | Frederick, MD | Clear | 34 | ||||
| 31 mi | KADW | Andrews Air Force Base, MD | Clear | 81 | ||||
| 34 mi | KFME | Laurel, MD | Cloudy | 22 | ||||
| 34 mi | KNYG | MCB Quantico, VA | Cloudy | 23 | ||||
| 40 mi | KCJR | Elkwood, VA | Cloudy | 24 | ||||
| 40 mi | KBWI | Glen Burnie, MD | Cloudy | 25 | ||||
| 40 mi | KRMN | Fredericksburg, VA | Cloudy | 44 | ||||
| 43 mi | KOKV | Winchester, VA | Cloudy | 24 | ||||
| 43 mi | KMRB | Martinsburg, WV | Few clouds | 26 | ||||
| 46 mi | KDMH | Baltimore, MD | - | 25 | ||||
Wednesday, February 12, 2014, 6:28 PM EST
|
Virginia
6:28 PM EST (23:28 GMT) |
79.4671 W
38.0044 N |
| Severe | Temp | Dew Point | Feels Like | Humidity | Pressure | Wind Speed | Wind Dir |
| Severe Weather Statements | |||
| Type | Areas Affected | ||
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Gloucester, Isle of Wight, James City, Mathews, Middlesex, Southampton, Suffolk, Surry, York | ||
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Tazewell | ||
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Alleghany, Amherst, Appomattox, Bath, Bedford, Bland, Botetourt, Buckingham, Campbell, Carroll, Craig, Floyd, Franklin, Giles, Grayson, Montgomery, Patrick, Pulaski, Roanoke, Rockbridge, Smyth, Wythe | ||
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Charlotte, Halifax, Henry, Pittsylvania | ||
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Buchanan, Dickenson | ||
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Caroline, Fluvanna, Goochland, Hanover, Louisa | ||
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Amelia, Charles City, Chesterfield, Cumberland, Dinwiddie, Henrico, New Kent, Nottoway, Powhatan, Prince Edward, Prince George | ||
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Greensville, Sussex | ||
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Essex, King William, King and Queen, Lancaster, Northumberland, Richmond, Westmoreland | ||
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Brunswick, Lunenburg, Mecklenburg | ||
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Albemarle, Augusta, Culpeper, Eastern Highland, Greene, Madison, Nelson, Orange, Page, Rappahannock, Rockingham, Shenandoah, Spotsylvania, Western Highland | ||
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Clarke, Fairfax, Frederick, Loudoun, Northern Fauquier, Prince William/Manassas/Manassas, Southern Fauquier, Stafford, Warren | ||
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Arlington/Falls Church/Alexandria, King George | ||
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Lee, Russell, Scott, Washington, Wise | ||
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Chesapeake, Newport News/Hampton, Norfolk/Portsmouth, Virginia Beach | ||
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