Alert archive / Virginia / Heat Advisories in 2021

Heat Advisory 6, NWS Baltimore/Washington

August 12, 202126 counties in Virginia; 15 counties in Maryland; 7 counties in West Virginia

NWS Baltimore/Washington issued this heat advisory at Aug 12, 2021, 6:04 PM EDT for 26 counties in Virginia; 15 counties in Maryland; 7 counties in West Virginia. It took effect at Aug 13, 2021, 11:00 AM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Aug 12, 2021, 6:04 PM EDT (22:04 UTC)
In effect from: Aug 13, 2021, 11:00 AM EDT
Expired: Aug 13, 2021, 7:00 PM EDT
In force: 8 hr
Issued by: NWS Baltimore/Washington

All 48 counties

Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Cecil 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, Arlington County, VA, City of Alexandria, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene 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, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV

The radar

The Sterling radar (KLWX), 22 km from the middle of the area, began a volume at 22:06 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.

What forecasters said that day

The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this heat advisory went out at Aug 12, 3:38 PM EDT, 2 hours 26 minutes earlier.

Area forecast discussion, Aug 12, 3:38 PM EDT, 2 hours 26 minutes before

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Hazardous weather outlook, Aug 12, 1:20 PM EDT, 4 hours 44 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 11, 10:49 PM EDT	Special Marine Warning	LWX		86 min
Aug 12, 2:15 AM EDT	Heat Advisory	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 19 more	18 hr

Nearby

Heat Advisories in Virginia, 2021 Heat Advisories in Maryland, 2021 Heat Advisories in West Virginia, 2021 Every heat advisory 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; radar from the NEXRAD Level II archive.