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.
Tuesday, February 11, 2014, 6:22 PM EST
Herndon, VA
County: Fairfax NWS Zone: VAZ053 (Fairfax) 6:22 PM EST (23:22 GMT) |
77.3873 W
38.9812 N Tue, Feb 11, 2014 |
| Severe Weather Statements | |||
| Type | Issue Time | Expire Time | Expires in |
| Tue, Feb 11, 12:08pm EST | Tue, Feb 11, 10:00pm EST | 3 hr, 37 min | |
| Current Conditions | |||||||||||||||||||||||||||||||||||||
Observation for Dulles Airport, Chantilly, VA as of 5:52PM (31 min ago)
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| National Weather Service Forecast | |
| Rest of this afternoon | Sunny. Highs in the lower 30s. North winds 5 to 10 mph. |
| Tonight | Mostly clear. Lows around 15. North winds around 5 mph. |
| Wednesday | Mostly sunny in the morning, then becoming mostly cloudy. Highs around 30. East winds 5 to 10 mph. |
| Wednesday night | Snow. Lows in the mid 20s. Northeast winds 5 to 10 mph, becoming north 10 to 15 mph after midnight. Chance of snow near 100 percent. |
| Thursday | Snow or sleet in the morning, then snow or rain in the afternoon. Highs in the lower 30s. North winds 15 to 20 mph with gusts up to 30 mph. Chance of precipitation near 100 percent. |
| Thursday night | Mostly cloudy with a 50 percent chance of snow. Lows in the mid 20s. |
| Friday | Partly sunny. Highs in the lower 40s. |
| Friday night | Mostly cloudy with a chance of snow and rain showers. Lows in the mid 20s. Chance of precipitation 30 percent. |
| Saturday | Mostly sunny. Highs in the mid 30s. |
| Saturday night | Mostly cloudy. Lows around 20. |
| Sunday | Partly sunny. Highs in the upper 30s. |
| Sunday night | Partly cloudy. Lows 15 to 20. |
| Washingtons birthday | Partly sunny. Highs in the lower 40s. |
| Area Conditions | Eng | |||||||
| Dist | Stn | City | Temp | Dew | Cond | Wind | Vis | Age |
| 5 mi | KIAD | Chantilly, VA | Few clouds | 31 | ||||
| 12 mi | KJYO | Leesburg, VA | Clear | 28 | ||||
| 20 mi | KHEF | Manassas, VA | Clear | 33 | ||||
| 21 mi | KDCA | Arlington, VA | Partly cloudy | 31 | ||||
| 21 mi | KDAA | Fort Belvoir, VA | Clear | 25 | ||||
| 30 mi | KFDK | Frederick, MD | Clear | 98 | ||||
| 31 mi | KADW | Andrews Air Force Base, MD | Clear | 85 | ||||
| 34 mi | KFME | Laurel, MD | Clear | 29 | ||||
| 34 mi | KNYG | MCB Quantico, VA | Clear | 27 | ||||
| 40 mi | KCJR | Elkwood, VA | Clear | 28 | ||||
| 40 mi | KBWI | Glen Burnie, MD | Few clouds | 29 | ||||
| 40 mi | KRMN | Fredericksburg, VA | Clear | 28 | ||||
| 43 mi | KOKV | Winchester, VA | Clear | 8 | ||||
| 43 mi | KMRB | Martinsburg, WV | Clear | 30 | ||||
| 46 mi | KDMH | Baltimore, MD | - | 29 | ||||
| Station Graphs |
Tuesday, February 11, 2014, 6:10 PM EST
Virginia
6:10 PM EST (23:10 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 | ||||||||||
| Gloucester, Greensville, James City, Middlesex, Southampton, Surry, Sussex | |||||||||||
| Bland, Carroll, Floyd, Franklin, Grayson, Halifax, Henry, Montgomery, Patrick, Pittsylvania, Pulaski, Smyth, Tazewell, Wythe | |||||||||||
| Amelia, Caroline, Cumberland, Fluvanna, Goochland, Hanover, Louisa, Nottoway, Powhatan, Prince Edward | |||||||||||
| Brunswick, Chesterfield, Dinwiddie, Henrico, Lunenburg, Mecklenburg | |||||||||||
| Charles City, New Kent, Prince George | |||||||||||
| Essex, King William, King and Queen, Lancaster, Northumberland, Richmond, Westmoreland | |||||||||||
| Albemarle, Augusta, Eastern Highland, Greene, Nelson, Orange, Rockingham, Western Highland | |||||||||||
| Clarke, Culpeper, Frederick, Loudoun, Madison, Northern Fauquier, Page, Rappahannock, Shenandoah, Southern Fauquier, Warren | |||||||||||
| Arlington/Falls Church/Alexandri, Fairfax, King George, Prince William/Manassas/Manassas, Spotsylvania, Stafford | |||||||||||
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