Alert archive / Virginia / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Baltimore/Washington
NWS Baltimore/Washington issued this red flag warning at Mar 11, 2021, 3:28 AM EST for 28 counties in Virginia; 13 counties in Maryland; 4 counties in West Virginia. It took effect at Mar 11, 2021, 11:00 AM EST. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 11, 2021, 3:28 AM EST (08:28 UTC)
- In effect from
- Mar 11, 2021, 11:00 AM EST
- Expired
- Mar 11, 2021, 6:00 PM EST
- In force
- 7 hr
- Issued by
- NWS Baltimore/Washington
All 45 counties
Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Saint Mary's County, MD, Washington County, MD, Albemarle County, VA, Arlington County, VA, Augusta County, VA, City of Alexandria, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, Highland County, VA, King George County, VA, Loudoun County, VA, Madison County, VA, Nelson County, VA, Orange County, VA, Page County, VA, Rappahannock County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Berkeley County, WV, Hardy County, WV, Jefferson County, WV, Pendleton County, WV
The radar
The Sterling radar (KLWX), 35 km from the middle of the area, began a volume at 08:31 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 8.5 hours before the alert went out and 40 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3030 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
573 WWUS81 KLWX 110828 RFWLWX URGENT - FIRE WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 328 AM EST Thu Mar 11 2021 MDZ502-WVZ050-051-502-504-110930- /O.CAN.KLWX.FW.A.0001.210311T1600Z-210311T2100Z/ Central and Eastern Allegany-Hampshire-Morgan-Eastern Grant- Eastern Mineral- 328 AM EST Thu Mar 11 2021 ...FIRE WEATHER WATCH IS CANCELLED FOR PORTIONS OF WESTERN MARYLAND AND EASTERN WEST VIRGINIA... The National Weather Service in Baltimore MD/Washington has cancelled the Fire Weather Watch. Widespread critical fire weather conditions are unlikely today. However, relative humidity values will be low with wind gusts above 20 mph and dry fuels, so the fire danger threat will still be elevated today. A Special Weather Statement will be issued to highlight this threat. $$ MDZ003-VAZ025>031-504-507-508-WVZ052-053-055-506-111630- /O.UPG.KLWX.FW.A.0001.210311T1600Z-210311T2100Z/ /O.NEW.KLWX.FW.W.0001.210311T1600Z-210311T2300Z/ Washington-Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren- Clarke-Eastern Highland-Northern Virginia Blue Ridge- Central Virginia Blue Ridge-Berkeley-Jefferson-Hardy- Eastern Pendleton- 328 AM EST Thu Mar 11 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 PM EST THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR PORTIONS OF NORTHWEST VIRGINIA...EASTERN WEST VIRGINIA...AND WESTERN MARYLAND... The National Weather Service in Baltimore MD/Washington has issued a Red Flag Warning for gusty winds and low humidity, which is in effect from 11 AM this morning to 6 PM EST this evening. The Fire Weather Watch is no longer in effect. * WINDS...Southwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...19 to 25 percent. * IMPACTS...Critical fire weather conditions are likely to develop today. All outdoor burning is discouraged, as fires could rapidly spread and become uncontrollable. * FUEL MOISTURE...4 to 8 percent for fine fuels. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Be careful of heat and sparks while operating any equipment, and avoid smoking in wildland areas. Residents are reminded that open air burning is prohibited before 4 PM in Maryland and Virginia, and before 5 PM in West Virginia. && $$ DCZ001-MDZ004>006-011-013-014-016>018-503>507-VAZ036>040-050>057- 501-502-505-506-111630- /O.UPG.KLWX.FW.A.0001.210311T1700Z-210311T2200Z/ /O.NEW.KLWX.FW.W.0001.210311T1600Z-210311T2300Z/ District of Columbia-Frederick MD-Carroll-Northern Baltimore- Southern Baltimore-Prince Georges-Anne Arundel-Charles-St. Marys- Calvert-Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George-Northern Fauquier-Southern Fauquier-Western Loudoun- Eastern Loudoun- 328 AM EST Thu Mar 11 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 PM EST THIS EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR MUCH OF CENTRAL AND NORTHERN VIRGINIA...CENTRAL MARYLAND...AND THE DISTRICT OF COLUMBIA... The National Weather Service in Baltimore MD/Washington has issued a Red Flag Warning for low humidity and gusty winds, which is in effect from 11 AM this morning to 6 PM EST this evening. The Fire Weather Watch is no longer in effect. * WINDS...Southwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...20 to 30 percent. * IMPACTS...Critical fire weather conditions are likely to develop today. All outdoor burning is discouraged, as fires could rapidly spread and become uncontrollable. * FUEL MOISTURE...5 to 8 percent for fine fuels. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Be careful of heat and sparks while operating any equipment, and avoid smoking in wildland areas. Residents are reminded that open air burning is prohibited before 4 PM in Maryland and Virginia. && $$
2 follow-up statements
550 WWUS81 KLWX 111618 RFWLWX URGENT - FIRE WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 1118 AM EST Thu Mar 11 2021 DCZ001-MDZ003>006-011-013-014-016>018-503>507-VAZ025>031-036>040- 050>057-501-502-504>508-WVZ052-053-055-506-112300- /O.CON.KLWX.FW.W.0001.000000T0000Z-210311T2300Z/ District of Columbia-Washington-Frederick MD-Carroll- Northern Baltimore-Southern Baltimore-Prince Georges-Anne Arundel- Charles-St. Marys-Calvert-Northwest Montgomery- Central and Southeast Montgomery-Northwest Howard- Central and Southeast Howard-Northwest Harford-Augusta-Rockingham- Shenandoah-Frederick VA-Page-Warren-Clarke-Nelson-Albemarle- Greene-Madison-Rappahannock-Orange-Culpeper- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George-Northern Fauquier-Southern Fauquier-Eastern Highland- Western Loudoun-Eastern Loudoun-Northern Virginia Blue Ridge- Central Virginia Blue Ridge-Berkeley-Jefferson-Hardy- Eastern Pendleton- 1118 AM EST Thu Mar 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM EST THIS EVENING FOR FOR GUSTY WINDS AND LOW HUMIDITY FOR MUCH OF NORTHERN, CENTRAL, AND SOUTHERN MARYLAND, NORTHERN AND CENTRAL VIRGINIA, AND EASTERN WEST VIRGINIA... * WINDS...Southwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Critical fire weather conditions are likely to develop today. All outdoor burning is discouraged, as fires could rapidly spread and become uncontrollable. * FUEL MOISTURE...4 to 8 percent for fine fuels. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Be careful of heat and sparks while operating any equipment, and avoid smoking in wildland areas. Residents are reminded that open air burning is prohibited before 4 PM in Maryland and Virginia, and before 5 PM in West Virginia. && $$ DHOF
092 WWUS81 KLWX 112257 RFWLWX URGENT - FIRE WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 557 PM EST Thu Mar 11 2021 DCZ001-MDZ003>006-011-013-014-016>018-503>507-VAZ025>031-036>040- 050>057-501-502-504>508-WVZ052-053-055-506-120000- /O.EXP.KLWX.FW.W.0001.000000T0000Z-210311T2300Z/ District of Columbia-Washington-Frederick MD-Carroll- Northern Baltimore-Southern Baltimore-Prince Georges-Anne Arundel- Charles-St. Marys-Calvert-Northwest Montgomery- Central and Southeast Montgomery-Northwest Howard- Central and Southeast Howard-Northwest Harford-Augusta-Rockingham- Shenandoah-Frederick VA-Page-Warren-Clarke-Nelson-Albemarle- Greene-Madison-Rappahannock-Orange-Culpeper- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George-Northern Fauquier-Southern Fauquier-Eastern Highland- Western Loudoun-Eastern Loudoun-Northern Virginia Blue Ridge- Central Virginia Blue Ridge-Berkeley-Jefferson-Hardy- Eastern Pendleton- 557 PM EST Thu Mar 11 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM EST THIS EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR EASTERN WEST VIRGINIA...NORTHERN AND CENTRAL VIRGINIA...MARYLAND WEST OF THE CHESAPEAKE BAY AND THE DISTRICT OF COLUMBIA. $$
Nearby
Red Flag Warnings in Virginia, 2021Red Flag Warnings in Maryland, 2021Red Flag Warnings in West Virginia, 2021Every red flag warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.