Alert archive / Virginia / Special Weather Statements in 2018

Special Weather Statement, NWS Blacksburg, VA

July 11, 2018Halifax County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 11, 2018, 7:55 PM EDT for Halifax County, Virginia. It was in force for 50 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: Jul 11, 2018, 7:55 PM EDT (23:55 UTC)
Expired: Jul 11, 2018, 8:45 PM EDT
In force: 50 min
Issued by: NWS Blacksburg, VA

County Halifax County, VA

The radar

The Raleigh/Durham radar (KRAX), 118 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 91 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: 360 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 879 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 102 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 Jul 11, 7:55 PM EDT, 0 minutes earlier.

Area forecast discussion, Jul 11, 7:55 PM EDT, 0 minutes before

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Hazardous weather outlook, Jul 11, 9:26 AM EDT, 10 hours 29 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Blacksburg VA
926 AM EDT Wed Jul 11 2018

NCZ004-005-VAZ023-024-121330-
Stokes-Rockingham-Botetourt-Rockbridge-
926 AM EDT Wed Jul 11 2018

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

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ001>003-018>020-VAZ007-009>020-032-WVZ042>044-507-508-121330-
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Yadkin-Tazewell-Smyth-Bland-
Giles-Wythe-Pulaski-Montgomery-Grayson-Carroll-Floyd-Craig-
Alleghany VA-Bath-Patrick-Mercer-Summers-Monroe-Eastern Greenbrier-
Western Greenbrier-
926 AM EDT Wed Jul 11 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...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ006-VAZ022-033>035-043>047-058-059-121330-
Caswell-Roanoke-Franklin-Bedford-Amherst-Henry-Pittsylvania-Campbell-
Appomattox-Buckingham-Halifax-Charlotte-
926 AM EDT Wed Jul 11 2018

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

.DAY ONE...Today and tonight.

Strong to isolated severe thunderstorms producing localized damaging
winds, hail, and very heavy rainfall will be possible along a
passing cold front this afternoon and evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jul 11, 6:39 PM EDT, 1 hour 16 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
639 PM EDT WED JUL 11 2018

VAZ059-112315-
Charlotte-
639 PM EDT WED JUL 11 2018

...A STRONG THUNDERSTORM WILL AFFECT
SOUTHEASTERN CHARLOTTE COUNTY...

Until 715 PM EDT

At 639 PM EDT, a strong thunderstorm was located near Drakes Branch,
moving south at 20 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Keysville...
Charlotte Court House...
Redoak...
Drakes Branch...
and Wylliesburg.

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

LAT...LON 3689 7849 3674 7861 3710 7871 3711 7850
      3709 7848 3708 7844
TIME...MOT...LOC 2239Z 341DEG 16KT 3699 7855

JR

Local storm report, Jul 11, 6:44 PM EDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
644 PM EDT WED JUL 11 2018

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

0638 PM     TSTM WND DMG     3 ESE PROVIDENCE        36.49N 79.32W
07/11/2018                   CASWELL            NC   TRAINED SPOTTER

            A TREE AND SEVERAL TREE LIMBS ABOUT THE SIZE OF A WRIST
            WERE REPORTED DOWNED ON BLANCH RD IN BLANCH, NC.

&&

LOCONTO

Special weather statement, Jul 11, 6:49 PM EDT, 1 hour 6 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
649 PM EDT WED JUL 11 2018

NCZ004-005-VAZ032-043-112330-
Stokes-Rockingham-Henry-Patrick-
649 PM EDT WED JUL 11 2018

...A STRONG THUNDERSTORM WILL AFFECT
EASTERN STOKES...NORTHWESTERN ROCKINGHAM...SOUTHWESTERN HENRY AND
SOUTHEASTERN PATRICK COUNTIES...

Until 730 PM EDT

At 648 PM EDT, a strong thunderstorm was located near Patrick
Springs, moving southeast at 15 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Mayodan...
Madison...
Walnut Cove...
Stuart...
and Stoneville.

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.

LAT...LON 3660 8040 3672 8016 3646 7988 3627 8012
TIME...MOT...LOC 2248Z 316DEG 12KT 3656 8022

JR

Local storm report, Jul 11, 7:17 PM EDT, 38 minutes before

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Special weather statement, Jul 11, 7:50 PM EDT, 5 minutes before

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Special weather statement, Jul 11, 7:55 PM 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
Jul 11, 12:38 PM EDT	Special Weather Statement	RNK	Pulaski	37 min
Jul 11, 1:22 PM EDT	Special Weather Statement	RNK	Smyth	38 min
Jul 11, 2:08 PM EDT	Special Weather Statement	RNK	Botetourt, City of Roanoke, City of Salem	67 min
Jul 11, 3:21 PM EDT	Special Weather Statement	RNK	Floyd, Pulaski, City of Radford	54 min
Jul 11, 3:28 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin, Henry, Pittsylvania	62 min
Jul 11, 3:38 PM EDT	Special Weather Statement	RNK	Appomattox	67 min
Jul 11, 4:13 PM EDT	Special Weather Statement	RNK	Franklin	47 min
Jul 11, 4:45 PM EDT	Special Weather Statement	RNK	Appomattox	30 min
Jul 11, 4:50 PM EDT	Special Weather Statement	RNK	Pittsylvania	25 min
Jul 11, 4:59 PM EDT	Special Weather Statement	RNK	Smyth	46 min
Jul 11, 5:35 PM EDT	Special Weather Statement	RNK	Halifax	25 min
Jul 11, 5:45 PM EDT	Special Weather Statement	RNK	City of Danville	45 min
Jul 11, 5:56 PM EDT	Special Weather Statement	RNK	Henry, Patrick	49 min
Jul 11, 6:39 PM EDT	Special Weather Statement	RNK	Charlotte	36 min
Jul 11, 6:45 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	30 min
Jul 11, 7:03 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania, City of Danville	57 min
Jul 11, 7:13 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	47 min
Jul 11, 7:50 PM EDT	Special Weather Statement	RNK	City of Danville	40 min
Jul 11, 3:08 PM EDT	Special Weather Statement	RNK	Surry	67 min
Jul 11, 3:45 PM EDT	Special Weather Statement	RNK	Rockingham	60 min
Jul 11, 4:01 PM EDT	Special Weather Statement	RNK	Wilkes	59 min
Jul 11, 4:43 PM EDT	Special Weather Statement	RNK	Wilkes	32 min
Jul 11, 6:32 PM EDT	Special Weather Statement	RNK	Caswell	43 min
Jul 11, 6:49 PM EDT	Special Weather Statement	RNK	Stokes	41 min

Nearby

Special Weather Statements in Virginia, 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.