Alert archive / Virginia / Special Weather Statements in 2020

Special Weather Statement, NWS Blacksburg, VA

August 22, 2020Appomattox County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 22, 2020, 11:10 PM EDT for Appomattox County, Virginia. It was in force for 65 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 22, 2020, 11:10 PM EDT (03:10 UTC)
Expired: Aug 23, 2020, 12:15 AM EDT
In force: 65 min
Issued by: NWS Blacksburg, VA

County Appomattox County, VA

The radar

The Roanoke radar (KFCX), 132 km from the middle of the area, began a volume at 03:13 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

Roanoke, VA (KRNK), launched 00:00Z, 3.2 hours before the alert went out and 61 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 181 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1183 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

083 
WWUS81 KRNK 230310
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
1110 PM EDT Sat Aug 22 2020

VAZ045-046-230415-
Campbell-Appomattox-
1110 PM EDT Sat Aug 22 2020

...HEAVY RAINFALL WILL AFFECT APPOMATTOX AND NORTHEASTERN CAMPBELL 
COUNTIES...

At 1108 PM EDT, a thunderstorm with heavy rainfall was located near 
Concord, moving east at 20 mph.

Winds in excess of 30 mph are possible with this storm. Heavy 
rainfall is also occurring with this storm, and may cause localized 
flooding.

Locations impacted include...
Appomattox...
Bent Creek...
Concord...
Appomattox National Historic Park...
Stonewall...
Oakville...
and Spout Spring.

Do not drive your vehicle through flooded roadways.

LAT...LON 3737 7862 3730 7906 3738 7909 3739 7906
      3742 7906 3742 7904 3743 7904 3743 7902
      3745 7901 3749 7894 3750 7894 3750 7892
      3753 7889 3754 7886 3754 7883 3755 7882
      3743 7868 3742 7864 3739 7864 3739 7862
TIME...MOT...LOC 0308Z 248DEG 16KT 3739 7903 

$$

MBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 8:01 PM EDT	Areal Flood Advisory	RNK	Alleghany, Bath, Botetourt, Rockbridge, City of Covington	19 min
Aug 22, 8:10 PM EDT	Special Weather Statement	RNK	Bath	35 min
Aug 22, 8:13 PM EDT	Special Weather Statement	RNK	City of Lexington	32 min
Aug 22, 8:20 PM EDT	Flash Flood Warning	RNK	Alleghany, Bath, Botetourt, Rockbridge	5 hr
Aug 22, 8:33 PM EDT	Areal Flood Advisory	RNK	Amherst, Bedford, Botetourt, Rockbridge	106 min
Aug 22, 8:47 PM EDT	Areal Flood Advisory	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	12 min
Aug 22, 8:59 PM EDT	Flash Flood Warning	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	3 hr
Aug 22, 10:04 PM EDT	Special Weather Statement	RNK	Amherst	26 min
Aug 23, 1:32 PM EDT	Special Weather Statement	RNK	Franklin	28 min
Aug 23, 2:04 PM EDT	Special Weather Statement	RNK	Grayson	26 min
Aug 23, 2:17 PM EDT	Special Weather Statement	RNK	Botetourt	28 min
Aug 23, 2:30 PM EDT	Special Weather Statement	RNK	Carroll	30 min
Aug 23, 3:09 PM EDT	Special Weather Statement	RNK	City of Radford	36 min
Aug 23, 4:04 PM EDT	Special Weather Statement	RNK	Montgomery	41 min
Aug 23, 4:12 PM EDT	Special Weather Statement	RNK	City of Galax	33 min
Aug 23, 4:35 PM EDT	Special Weather Statement	RNK	Roanoke, City of Roanoke, City of Salem	55 min
Aug 23, 4:47 PM EDT	Special Weather Statement	RNK	Carroll, City of Galax	28 min
Aug 23, 4:52 PM EDT	Special Weather Statement	RNK	Franklin	38 min
Aug 23, 4:56 PM EDT	Special Weather Statement	RNK	Ashe	34 min
Aug 22, 9:38 PM EDT	Areal Flood Advisory	RNK	Greenbrier	112 min

Nearby

Special Weather Statements in Virginia, 2020 Every 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.