Alert archive / Virginia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 156, NWS Blacksburg, VA

July 15, 2014Halifax County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 15, 2014, 3:34 PM EDT for Halifax County, Virginia. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 15, 2014, 3:34 PM EDT (19:34 UTC)
Expired: Jul 15, 2014, 4:00 PM EDT
In force: 26 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Halifax County, VA

The radar

The Roanoke radar (KFCX), 122 km from the middle of the area, began a volume at 19:34 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 15, 1:43 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.6 hours before the alert went out and 69 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: 61 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 878 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 15, 3:30 PM EDT, 4 minutes earlier.

Area forecast discussion, Jul 15, 3:30 PM EDT, 4 minutes before

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Hazardous weather outlook, Jul 15, 1:48 PM EDT, 1 hour 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
148 PM EDT TUE JUL 15 2014

NCZ001-002-018-VAZ007-009>020-WVZ042>045-161800-
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-
MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-MERCER-
SUMMERS-MONROE-GREENBRIER-
148 PM EDT TUE JUL 15 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST NORTH
CAROLINA...SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA AND SOUTHEAST
WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ003-004-019-020-VAZ022>024-032>034-161800-
SURRY-STOKES-WILKES-YADKIN-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-
FRANKLIN-BEDFORD-
148 PM EDT TUE JUL 15 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...NORTHWEST NORTH CAROLINA...SOUTH CENTRAL
VIRGINIA...SOUTHWEST VIRGINIA AND WEST CENTRAL VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A VERY LOW THREAT OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND EVENING. THE PRIMARY THREATS ARE WINDS AND SMALL HAIL FROM
STRONG STORMS. HEAVY RAIN IS ALSO LIKELY WITH ANY OF THE STRONGER
STORMS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ005-006-VAZ035-043>047-058-059-161800-
ROCKINGHAM-CASWELL-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-APPOMATTOX-
BUCKINGHAM-HALIFAX-CHARLOTTE-
148 PM EDT TUE JUL 15 2014

...SEVERE THUNDERSTORM WATCH 423 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...CENTRAL VIRGINIA AND SOUTH CENTRAL VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

RCS

In the hours before

Special weather statement, Jul 15, 3:00 PM EDT, 34 minutes before

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Special weather statement, Jul 15, 3:13 PM EDT, 21 minutes before

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Special weather statement, Jul 15, 3:14 PM EDT, 20 minutes before

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Special weather statement, Jul 15, 3:16 PM EDT, 18 minutes before

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Special weather statement, Jul 15, 3:26 PM EDT, 8 minutes before

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Special weather statement, Jul 15, 3:31 PM EDT, 3 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 14, 9:46 PM EDT	Special Weather Statement	RNK	Halifax	14 min
Jul 15, 2:00 PM EDT	Special Weather Statement	RNK	City of Danville	45 min
Jul 15, 2:45 PM EDT	Special Weather Statement	RNK	Halifax	30 min
Jul 15, 3:00 PM EDT	Special Weather Statement	RNK	Charlotte	30 min
Jul 15, 3:13 PM EDT	Special Weather Statement	RNK	Halifax	32 min
Jul 15, 3:16 PM EDT	Special Weather Statement	RNK	Halifax	29 min
Jul 15, 3:31 PM EDT	Special Weather Statement	RNK	Halifax	29 min
Jul 15, 2:17 PM EDT	Special Weather Statement	RNK	Caswell	28 min
Jul 15, 2:35 PM EDT	Special Weather Statement	RNK	Caswell	25 min
Jul 15, 2:42 PM EDT	Special Weather Statement	RNK	Caswell	33 min
Jul 15, 2:58 PM EDT	Special Weather Statement	RNK	Caswell	17 min
Jul 15, 3:14 PM EDT	Special Weather Statement	RNK	Caswell	31 min
Jul 15, 3:26 PM EDT	Special Weather Statement	RNK	Caswell	19 min
Jul 15, 5:45 PM EDT	Special Weather Statement	RNK	Caswell	30 min
Jul 15, 6:17 PM EDT	Special Weather Statement	RNK	Rockingham	28 min
Jul 15, 6:45 PM EDT	Special Weather Statement	RNK	Caswell	30 min
Jul 15, 1:31 AM EDT	Special Weather Statement	RNK	Summers	44 min
Jul 15, 2:26 AM EDT	Special Weather Statement	RNK	Greenbrier	49 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2014 Every severe thunderstorm warning in 2014

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.