Alert archive / Virginia / Wind Advisories in 2020
Wind Advisory 8, NWS Baltimore/Washington
NWS Baltimore/Washington issued this wind advisory at Apr 8, 2020, 8:13 PM EDT for 27 counties in Virginia; 11 counties in Maryland; 8 counties in West Virginia. It took effect at Apr 9, 2020, 10:00 AM EDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Apr 8, 2020, 8:13 PM EDT (00:13 UTC)
- In effect from
- Apr 9, 2020, 10:00 AM EDT
- Expired
- Apr 9, 2020, 7:38 PM EDT
- In force
- 10 hr
- Issued by
- NWS Baltimore/Washington
All 46 counties
Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Washington County, MD, Albemarle County, VA, Amherst County, VA, Arlington County, VA, Augusta County, VA, City of Alexandria, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, Highland County, VA, Loudoun County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah 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, Pendleton County, WV
The radar
The Sterling radar (KLWX), 54 km from the middle of the area, began a volume at 00:16 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, 0.2 hours before the alert went out and 60 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
- 5 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 2113 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this wind 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 wind advisory went out at Apr 8, 3:16 PM EDT, 4 hours 57 minutes earlier.
Area forecast discussion, Apr 8, 3:16 PM EDT, 4 hours 57 minutes before
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</html>Hazardous weather outlook, Apr 8, 2:49 PM EDT, 5 hours 24 minutes before
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Local storm report, Apr 8, 4:22 PM EDT, 3 hours 51 minutes before
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</html>The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 2:42 AM EDT | Severe Thunderstorm Warning | LWX | Highland | 63 min |
| Apr 9, 3:14 AM EDT | Severe Thunderstorm Warning | LWX | Augusta, City of Staunton, City of Waynesboro | 61 min |
| Apr 9, 5:33 AM EDT | Special Marine Warning | LWX | 51 min | |
| Apr 9, 7:58 AM EDT | Special Marine Warning | LWX | 66 min | |
| Apr 9, 11:44 AM EDT | Severe Thunderstorm Warning | LWX | Clarke, Frederick, Loudoun, City of Winchester | 46 min |
| Apr 9, 12:00 PM EDT | Special Marine Warning | LWX | 90 min | |
| Apr 9, 12:06 PM EDT | Special Marine Warning | LWX | 114 min | |
| Apr 9, 12:43 PM EDT | Special Marine Warning | LWX | 52 min | |
| Apr 9, 12:58 PM EDT | Special Marine Warning | LWX | 37 min | |
| Apr 9, 7:37 PM EDT | Gale Warning | LWX | 26 hr | |
| Apr 9, 7:37 PM EDT | Small Craft Advisory | LWX | 46 hr | |
| Apr 9, 7:38 PM EDT | Wind Advisory | LWX | Albemarle, Amherst, Arlington, Augusta, Clarke, Fairfax and 20 more | 22 hr |
| Apr 9, 7:47 PM EDT | Freeze Watch | LWX | Albemarle, Amherst, Augusta, Clarke, Culpeper, Fauquier and 16 more | 19 hr |
| Apr 9, 3:19 AM EDT | Coastal Flood Advisory | LWX | Anne Arundel | 9 hr |
| Apr 9, 11:51 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 39 min |
| Apr 9, 12:13 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 47 min |
| Apr 9, 12:24 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 66 min |
| Apr 9, 1:16 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford, City of Baltimore | 18 min |
| Apr 9, 2:52 AM EDT | Severe Thunderstorm Warning | LWX | Grant, Hardy | 38 min |
Nearby
Wind Advisories in Virginia, 2020Wind Advisories in Maryland, 2020Wind Advisories in West Virginia, 2020Every wind advisory in 2020
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.