Alert archive / North Carolina / Special Weather Statements in 2018

Special Weather Statement, NWS Blacksburg, VA

August 20, 2018Rockingham County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Aug 20, 2018, 1:50 AM EDT for Rockingham County, North Carolina. It was in force for 55 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 20, 2018, 1:50 AM EDT (05:50 UTC)
Expired: Aug 20, 2018, 2:45 AM EDT
In force: 55 min
Issued by: NWS Blacksburg, VA

County Rockingham County, NC

The radar

The Roanoke radar (KFCX), 82 km from the middle of the area, began a volume at 05:50 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 00:00Z, 5.8 hours before the alert went out and 33 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: 1776 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 41 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 20, 12:46 AM EDT, 1 hour 4 minutes earlier.

Area forecast discussion, Aug 20, 12:46 AM EDT, 1 hour 4 minutes before

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Hazardous weather outlook, Aug 19, 9:21 PM EDT, 4 hours 29 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Blacksburg VA
921 PM EDT Sun Aug 19 2018

NCZ005-006-VAZ023-024-033>035-043>047-058-059-210130-
Rockingham-Caswell-Botetourt-Rockbridge-Franklin-Bedford-Amherst-
Henry-Pittsylvania-Campbell-Appomattox-Buckingham-Halifax-Charlotte-
921 PM EDT Sun Aug 19 2018

This Hazardous Weather Outlook is for north central North Carolina,
central Virginia, south central Virginia and west central Virginia.

.DAY ONE...Tonight.

Clusters or slow moving showers and thunderstorms could result in
very heavy rainfall which may be enough to produce flooding or
flash flooding into the overnight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

On Monday, there is a low probability for widespread hazardous
weather.

On Tuesday, scattered to numerous thunderstorms are expected to
develop again. A few may become strong to severe in the afternoon
and early evening. Strong to damaging winds are the primary
thunderstorm hazard with hail a secondary hazard. Torrential rain
with thunderstorms may trigger localized flooding as well.

Hazardous weather is not expected at this time from Wednesday
through Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ001>004-018>020-VAZ007-009>020-022-032-WVZ042>044-507-508-210130-
Ashe-Alleghany NC-Surry-Stokes-Watauga-Wilkes-Yadkin-Tazewell-Smyth-
Bland-Giles-Wythe-Pulaski-Montgomery-Grayson-Carroll-Floyd-Craig-
Alleghany VA-Bath-Roanoke-Patrick-Mercer-Summers-Monroe-
Eastern Greenbrier-Western Greenbrier-
921 PM EDT Sun Aug 19 2018

This Hazardous Weather Outlook is for north central North Carolina,
northwest North Carolina, southwest Virginia, west central Virginia
and southeast West Virginia.

.DAY ONE...Tonight.

There is a low probability for widespread hazardous weather.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

On Monday, there is a low probability for widespread hazardous
weather.

On Tuesday, scattered to numerous thunderstorms are expected to
develop again. A few may become strong to severe in the afternoon
and early evening. Strong to damaging winds are the primary
thunderstorm hazard with hail a secondary hazard. Torrential rain
with thunderstorms may trigger localized flooding as well.

Hazardous weather is not expected at this time from Wednesday
through Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

In the hours before

Local storm report, Aug 19, 11:08 PM EDT, 2 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1108 PM EDT SUN AUG 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1050 PM     FLASH FLOOD      5 SW CHATHAM            36.77N 79.46W
08/19/2018                   PITTSYLVANIA       VA   911 CALL CENTER

            ROAD CLOSED TO DUE FLASH FLOODING FROM BEARSKIN CREEK
            NEAR THE INTERSTECTION OF IRISH ROAD AND BEARSKIN ROAD.

&&

Special weather statement, Aug 19, 11:32 PM EDT, 2 hours 18 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1132 PM EDT SUN AUG 19 2018

VAZ033-043-200400-
Henry-Franklin-
1132 PM EDT SUN AUG 19 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT
NORTHEASTERN HENRY AND SOUTHEASTERN FRANKLIN COUNTIES AND THE
NORTHEASTERN CITY OF MARTINSVILLE...

Until midnight EDT.

At 1131 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Sontag to near Snow Creek to
Collinsville. Movement was southeast at 10 mph.

Winds in excess of 30 mph are possible with these storms.

Locations impacted include...
Martinsville...
Snow Creek...
Leatherwood...
Mountain Valley...
and Laurel Park.

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

LAT...LON 3674 7994 3681 7981 3692 7979 3686 7966
      3676 7966 3674 7967 3668 7979
TIME...MOT...LOC 0331Z 302DEG 11KT 3689 7977 3679 7977 3673 7991

DS

Special weather statement, Aug 20, 12:02 AM EDT, 1 hour 48 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1202 AM EDT MON AUG 20 2018

VAZ047-200430-
Buckingham-
1202 AM EDT MON AUG 20 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN
BUCKINGHAM COUNTY...

Until 1230 AM EDT.

At 1201 AM EDT, radar indicated strong thunderstorms were located
isolated along a line extending from near Buckingham to near
Sheppards.

Movement was north at 5 mph.

Winds in excess of 30 mph and pea size hail are possible with these
storms.

Locations impacted include...
Buckingham...
and Dillwyn.

LAT...LON 3738 7844 3752 7856 3763 7853 3749 7835
TIME...MOT...LOC 0401Z 188DEG 6KT 3753 7851 3741 7843

DS

Local storm report, Aug 20, 12:22 AM EDT, 1 hour 28 minutes before

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Special weather statement, Aug 20, 12:32 AM EDT, 1 hour 18 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
1232 AM EDT MON AUG 20 2018

VAZ011-013-014-200530-
Giles-Pulaski-Montgomery-
1232 AM EDT MON AUG 20 2018

...STRONG THUNDERSTORMS WILL AFFECT PULASKI...GILES AND NORTHERN
MONTGOMERY COUNTIES AS WELL AS THE CITY OF RADFORD...

Until 130 AM EDT.

At 1231 AM EDT, a strong thunderstorm was located over White Gate,
moving northeast at 5 mph.

Locations impacted include...
Blacksburg...
Christiansburg...
Radford...
Pulaski...
and Pearisburg.

This includes The following Location Virginia Tech.

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

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

LAT...LON 3732 8044 3733 8039 3737 8033 3734 8026
      3731 8026 3724 8020 3697 8082 3711 8093
      3715 8086 3717 8088 3718 8086 3719 8087
      3718 8089 3720 8092 3737 8076 3740 8080
      3738 8075 3742 8064 3747 8056 3748 8051
TIME...MOT...LOC 0431Z 209DEG 5KT 3717 8083

RAB

Special weather statement, Aug 20, 1:50 AM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 8:17 PM EDT	Flash Flood Warning	RNK	Halifax, Pittsylvania	5 hr
Aug 19, 9:15 PM EDT	Special Weather Statement	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	60 min
Aug 19, 9:21 PM EDT	Special Weather Statement	RNK	Pittsylvania	54 min
Aug 19, 9:56 PM EDT	Special Weather Statement	RNK	Franklin	64 min
Aug 19, 10:36 PM EDT	Areal Flood Advisory	RNK	Bedford, Franklin	2 hr
Aug 19, 11:05 PM EDT	Special Weather Statement	RNK	City of Martinsville	25 min
Aug 19, 11:32 PM EDT	Special Weather Statement	RNK	City of Martinsville	28 min
Aug 20, 12:02 AM EDT	Special Weather Statement	RNK	Buckingham	28 min
Aug 20, 12:07 AM EDT	Areal Flood Advisory	RNK	Henry, Patrick, City of Martinsville	4 hr
Aug 20, 12:32 AM EDT	Special Weather Statement	RNK	Giles, Montgomery, Pulaski, City of Radford	58 min
Aug 20, 12:50 AM EDT	Flash Flood Warning	RNK	Henry, Patrick, City of Martinsville	3 hr
Aug 20, 1:20 AM EDT	Areal Flood Warning	RNK	Halifax, Pittsylvania	3 hr
Aug 20, 2:34 PM EDT	Flash Flood Watch	RNK	Carroll, Floyd, Franklin, Grayson, Halifax, Henry and 9 more	12 hr
Aug 19, 9:25 PM EDT	Special Weather Statement	RNK	Caswell	65 min
Aug 19, 10:32 PM EDT	Flash Flood Warning	RNK	Caswell	6 hr
Aug 20, 5:09 PM EDT	Special Weather Statement	RNK	Watauga	66 min
Aug 20, 6:37 PM EDT	Special Weather Statement	RNK	Wilkes	53 min
Aug 20, 7:31 PM EDT	Areal Flood Advisory	RNK	Wilkes	119 min
Aug 20, 7:57 PM EDT	Special Weather Statement	RNK	Yadkin	63 min

Nearby

Special Weather Statements in North Carolina, 2018 Every special weather statement in 2018

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.