Alert archive / North Carolina / Special Weather Statements in 2020

Special Weather Statement, NWS Blacksburg, VA

August 7, 2020Alleghany County, Ashe County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Aug 7, 2020, 2:10 PM EDT for Alleghany County, Ashe County, North Carolina. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 7, 2020, 2:10 PM EDT (18:10 UTC)
Expired
Aug 7, 2020, 2:45 PM EDT
In force
35 min
Issued by
NWS Blacksburg, VA

Counties Alleghany County, NC, Ashe County, NC

The radar

The Roanoke radar (KFCX), 109 km from the middle of the area, began a volume at 18:11 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.2 hours before the alert went out and 127 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.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2020-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2020-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
963 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

NWS Blacksburg, VA wrote its last area forecast discussion before this special weather statement went out at Aug 7, 10:00 AM EDT, 4 hours 10 minutes earlier.

Area forecast discussion, Aug 7, 10:00 AM EDT, 4 hours 10 minutes before
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Hazardous weather outlook, Aug 7, 3:50 AM EDT, 10 hours 20 minutes before
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In the hours before

Local storm report, Aug 7, 10:40 AM EDT, 3 hours 30 minutes before
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Local storm report, Aug 7, 10:43 AM EDT, 3 hours 27 minutes before
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Local storm report, Aug 7, 11:01 AM EDT, 3 hours 9 minutes before
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Special weather statement, Aug 7, 1:30 PM EDT, 40 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
130 PM EDT Fri Aug 7 2020

VAZ032-071800-
Patrick-
130 PM EDT Fri Aug 7 2020

...A STRONG THUNDERSTORM WILL AFFECT
NORTHEASTERN PATRICK COUNTY...

At 130 PM EDT, a strong thunderstorm was located over Woolwine,
moving east at 15 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Woolwine...
Rocky Knob Recreation Area...
Charity...
and Buffalo Ridge.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3680 8038 3680 8036 3681 8035 3687 8019
      3685 8014 3673 8009 3671 8009 3670 8037
TIME...MOT...LOC 1730Z 255DEG 12KT 3678 8030

RR
Special weather statement, Aug 7, 1:34 PM EDT, 36 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
134 PM EDT Fri Aug 7 2020

NCZ001-002-019-071800-
Ashe-Wilkes-Alleghany-
134 PM EDT Fri Aug 7 2020

...A STRONG THUNDERSTORM WILL AFFECT
WESTERN ALLEGHANY...NORTH CENTRAL WILKES AND SOUTHEASTERN ASHE
COUNTIES IN NORTHWESTERN NORTH CAROLINA...

At 134 PM EDT, a strong thunderstorm was located over Glendale
Springs, moving east at 10 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
West Jefferson...
Laurel Springs...
Glendale Springs...
Mc Grady...
Stratford...
Idlewild...
and Wagoner.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3630 8145 3639 8149 3654 8121 3632 8111
TIME...MOT...LOC 1734Z 257DEG 9KT 3636 8138

RR
Special weather statement, Aug 7, 2:10 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
210 PM EDT Fri Aug 7 2020

NCZ001-002-VAZ015-071845-
Ashe-Alleghany-Grayson-
210 PM EDT Fri Aug 7 2020

...STRONG THUNDERSTORMS WILL AFFECT ALLEGHANY...ASHE COUNTIES IN
NORTHWESTERN NORTH CAROLINA AND SOUTHEASTERN GRAYSON COUNTIES IN
SOUTHWESTERN VIRGINIA...

At 209 PM EDT, strong thunderstorms extended from near Baywood to
near Baldwin. Movement was southeast at 5 mph.

Winds in excess of 40 mph and half inch hail are possible with these
storms.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

Locations impacted include...
Galax...
Sparta...
Jefferson...
West Jefferson...
Independence...
Laurel Springs...
and Ennice.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.

LAT...LON 3640 8168 3672 8104 3664 8092 3663 8093
      3663 8091 3659 8086 3659 8087 3643 8115
      3643 8117 3641 8118 3636 8127 3637 8132
      3637 8136 3631 8136 3629 8140 3629 8141
      3628 8141 3624 8148 3627 8154
TIME...MOT...LOC 1809Z 295DEG 5KT 3664 8100 3633 8156

MBS

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 6, 8:39 PM EDTSpecial Weather StatementRNKCampbell51 min
Aug 6, 8:47 PM EDTSevere Thunderstorm WarningRNKBedford, Campbell, Charlotte, Franklin, Halifax, Pittsylvania58 min
Aug 6, 9:09 PM EDTSpecial Weather StatementRNKCity of Lynchburg36 min
Aug 6, 10:45 PM EDTAreal Flood AdvisoryRNKAmherst, Bedford, Campbell, City of Lynchburg117 min
Aug 7, 1:30 PM EDTSpecial Weather StatementRNKPatrick30 min
Aug 7, 2:22 PM EDTSpecial Weather StatementRNKFranklin23 min
Aug 7, 2:44 PM EDTSpecial Weather StatementRNKFranklin46 min
Aug 7, 3:07 PM EDTAreal Flood AdvisoryRNKGrayson3 hr
Aug 7, 3:54 PM EDTSpecial Weather StatementRNKCity of Galax36 min
Aug 7, 4:14 PM EDTSpecial Weather StatementRNKCarroll31 min
Aug 7, 1:34 PM EDTSpecial Weather StatementRNKAlleghany26 min
Aug 7, 3:00 PM EDTSpecial Weather StatementRNKAshe45 min
Aug 7, 3:04 PM EDTAreal Flood AdvisoryRNKAshe, Wilkes3 hr
Aug 7, 3:29 PM EDTFlash Flood WarningRNKAshe6 hr
Aug 7, 4:58 PM EDTSpecial Weather StatementRNKWilkes32 min

Nearby

Special Weather Statements in North Carolina, 2020Every special weather statement 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.