Alert archive / Virginia / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

September 22, 2021Amherst County, Virginia

NWS Blacksburg, VA issued this special weather statement at Sep 22, 2021, 2:02 PM EDT for Amherst County, Virginia. It was in force for 28 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: Sep 22, 2021, 2:02 PM EDT (18:02 UTC)
Expired: Sep 22, 2021, 2:30 PM EDT
In force: 28 min
Issued by: NWS Blacksburg, VA
Hail: 0.00 in
Wind: 40

County Amherst County, VA

The radar

The Roanoke radar (KFCX), 129 km from the middle of the area, began a volume at 18:05 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 12:00Z, 6.0 hours before the alert went out and 68 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: 266 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 555 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

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 Sep 22, 1:40 PM EDT, 22 minutes earlier.

Area forecast discussion, Sep 22, 1:40 PM EDT, 22 minutes before

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Hazardous weather outlook, Sep 22, 4:05 AM EDT, 9 hours 57 minutes before

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In the hours before

Local storm report, Sep 22, 11:28 AM EDT, 2 hours 34 minutes before

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Local storm report, Sep 22, 11:39 AM EDT, 2 hours 23 minutes before

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Local storm report, Sep 22, 12:14 PM EDT, 1 hour 48 minutes before

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Special weather statement, Sep 22, 1:35 PM EDT, 27 minutes before

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Special weather statement, Sep 22, 2:02 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
202 PM EDT Wed Sep 22 2021

VAZ035-221830-
Amherst VA-
202 PM EDT Wed Sep 22 2021

...A strong thunderstorm will impact portions of
central Amherst County through 230 PM EDT...

At 201 PM EDT, Doppler radar was tracking a strong thunderstorm over
Pleasant View, or near Forks Of Buffalo, moving northeast at 40 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Forks Of Buffalo...
Clifford...
Pleasant View...
Lowesville...
Alto...
Oronoco...
and Piney River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Additional statements will be issued as conditions warrant.

&&

LAT...LON 3778 7911 3779 7909 3778 7907 3772 7907
      3770 7903 3771 7902 3770 7901 3770 7899
      3768 7898 3749 7918 3759 7937 3781 7922
      3779 7921 3779 7920 3781 7914
TIME...MOT...LOC 1801Z 213DEG 35KT 3761 7922

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

DB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 21, 8:07 PM EDT	Areal Flood Advisory	RNK	Floyd, Franklin	3 hr
Sep 21, 9:00 PM EDT	Areal Flood Advisory	RNK	Floyd, Franklin, Montgomery, Roanoke, City of Roanoke, City of Salem	3 hr
Sep 21, 9:34 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Patrick	3 hr
Sep 21, 10:10 PM EDT	Flash Flood Warning	RNK	Carroll, Floyd, Patrick	6 hr
Sep 21, 10:19 PM EDT	Areal Flood Advisory	RNK	Floyd, Patrick	3 hr
Sep 21, 11:25 PM EDT	Areal Flood Advisory	RNK	Floyd, Franklin	3 hr
Sep 21, 11:56 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Montgomery, Pulaski, City of Radford	6 hr
Sep 22, 12:20 AM EDT	Flash Flood Warning	RNK	Floyd, Patrick	4 hr
Sep 22, 1:00 AM EDT	Flash Flood Warning	RNK	Franklin, Roanoke, City of Roanoke, City of Salem	3 hr
Sep 22, 1:12 AM EDT	Flash Flood Warning	RNK	Montgomery	6 hr
Sep 22, 2:27 AM EDT	Flash Flood Warning	RNK	Craig, Giles	6 hr
Sep 22, 5:03 AM EDT	Areal Flood Advisory	RNK	Floyd, Franklin, Henry, Patrick	3 hr
Sep 22, 11:00 AM EDT	Areal Flood Advisory	RNK	Bedford, Botetourt, Floyd, Franklin, Henry, Patrick and 7 more	11 hr
Sep 22, 1:35 PM EDT	Special Weather Statement	RNK	City of Martinsville	25 min
Sep 22, 2:52 PM EDT	Areal Flood Advisory	RNK	Craig, Giles, Montgomery, Pulaski, City of Radford	2 hr
Sep 22, 3:38 PM EDT	Special Weather Statement	RNK	Floyd, Montgomery	22 min
Sep 22, 4:01 PM EDT	Special Weather Statement	RNK	Patrick	29 min
Sep 22, 4:20 PM EDT	Special Weather Statement	RNK	Patrick	40 min
Sep 22, 4:27 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	33 min
Sep 22, 4:35 PM EDT	Special Weather Statement	RNK	Franklin	40 min
Sep 22, 4:47 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	28 min
Sep 22, 4:53 PM EDT	Flash Flood Warning	RNK	Bedford, Franklin, Patrick, Roanoke	4 hr
Sep 22, 5:32 PM EDT	Flash Flood Warning	RNK	Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	3 hr
Sep 22, 7:10 PM EDT	Areal Flood Warning	RNK	Rockbridge	2 hr
Sep 22, 7:19 PM EDT	Areal Flood Advisory	RNK	Amherst	3 hr
Sep 22, 1:41 AM EDT	Areal Flood Warning	RNK	Surry	6 hr
Sep 22, 3:55 AM EDT	Areal Flood Advisory	RNK	Stokes	3 hr
Sep 22, 3:48 PM EDT	Special Weather Statement	RNK	Stokes	27 min
Sep 22, 4:08 PM EDT	Areal Flood Advisory	RNK	Stokes, Surry	2 hr
Sep 22, 4:59 PM EDT	Flash Flood Warning	RNK	Stokes, Surry, Yadkin	84 min

Nearby

Special Weather Statements in Virginia, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.