Alert archive / Virginia / High Wind Watches in 2020
High Wind Watch 2, NWS Baltimore/Washington
NWS Baltimore/Washington issued this high wind watch at Apr 12, 2020, 4:47 AM EDT for 15 counties in Virginia; Allegany County, Maryland; Grant County, Mineral County, Pendleton County, West Virginia. It took effect at Apr 13, 2020, 6:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Apr 12, 2020, 4:47 AM EDT (08:47 UTC)
- In effect from
- Apr 13, 2020, 6:00 AM EDT
- Expired
- Apr 12, 2020, 12:35 PM EDT
- In force
- Issued by
- NWS Baltimore/Washington
Counties Allegany County, MD, Albemarle County, VA, Amherst County, VA, Augusta County, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, Greene County, VA, Highland County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Warren County, VA, Grant County, WV, Mineral County, WV, Pendleton County, WV
The radar
The Sterling radar (KLWX), 132 km from the middle of the area, began a volume at 08:47 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
Pittsburgh, PA (KPIT), launched 00:00Z, 8.8 hours before the alert went out and 242 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
- 2039 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this high wind watch 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 high wind watch went out at Apr 12, 3:56 AM EDT, 51 minutes earlier.
Area forecast discussion, Apr 12, 3:56 AM EDT, 51 minutes before
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</html>Hazardous weather outlook, Apr 11, 4:26 PM EDT, 12 hours 21 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 12, 12:35 PM EDT | High Wind Warning | LWX | Albemarle, Amherst, Augusta, Greene, Highland, King George and 10 more | 26 hr |
| Apr 12, 12:35 PM EDT | Wind Advisory | LWX | Albemarle, Amherst, Arlington, Augusta, Clarke, Culpeper and 27 more | 29 hr |
| Apr 12, 3:18 PM EDT | Storm Warning | LWX | 24 hr | |
| Apr 12, 10:53 AM EDT | Coastal Flood Watch | LWX | Anne Arundel, Baltimore, Harford, City of Baltimore | 16 hr |
Nearby
High Wind Watches in Virginia, 2020High Wind Watches in West Virginia, 2020High Wind Watches in Maryland, 2020Every high wind watch 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.