Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

May 1, 2012Floyd County, Virginia

NWS Blacksburg, VA issued this special weather statement at May 1, 2012, 8:00 PM EDT for Floyd County, Virginia. It was in force for 30 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: May 1, 2012, 8:00 PM EDT (00:00 UTC)
Expired: May 1, 2012, 8:30 PM EDT
In force: 30 min
Issued by: NWS Blacksburg, VA

County Floyd County, VA

The radar

The Roanoke radar (KFCX), 4 km from the middle of the area, began a volume at 00:01 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, 0.0 hours before the alert went out and 74 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: 651 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1346 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 May 1, 7:46 PM EDT, 14 minutes earlier.

Area forecast discussion, May 1, 7:46 PM EDT, 14 minutes before

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Hazardous weather outlook, May 1, 3:25 PM EDT, 4 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
325 PM EDT TUE MAY 1 2012

NCZ003>006-019-020-VAZ032>035-043>047-058-059-021930-
SURRY-STOKES-ROCKINGHAM-CASWELL-WILKES-YADKIN-PATRICK-FRANKLIN-
BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-
HALIFAX-CHARLOTTE-
325 PM EDT TUE MAY 1 2012

...SEVERE THUNDERSTORM WATCH 219 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

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

STRONG STORMS WILL BE POSSIBLE AGAIN DURING THE DAY WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

NCZ001-002-018-VAZ007-009>020-022>024-WVZ042>045-021930-
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-
MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-
BOTETOURT-ROCKBRIDGE-MERCER-SUMMERS-MONROE-GREENBRIER-
325 PM EDT TUE MAY 1 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

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

STRONG STORMS WILL BE POSSIBLE AGAIN DURING THE DAY WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, May 1, 6:13 PM EDT, 1 hour 47 minutes before

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE BLACKSBURG VA
613 PM EDT TUE MAY 1 2012

VAZ032-012245-
PATRICK VA-
613 PM EDT TUE MAY 1 2012

...STRONG THUNDERSTORMS WILL AFFECT MUCH OF SOUTHERN PATRICK COUNTY
THROUGH 645 PM EDT...

AT 544 PM EDT...A BAND OF STRONG THUNDERSTORMS HAD DEVELOPED ACROSS
THE SOUTHERN HALF OF PATRICK COUNTY FROM GROUNDHOG MOUNTAIN...TO
STUART...TO CRITZ...MOVING EAST AT 15 MPH.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY TO NICKEL-SIZED HAIL.

THIS STORM WILL BE NEAR STUART AROUND 600 PM...CRITZ AROUND 625 PM
AND PENNS STORE AROUND 645 PM.

LAT...LON 3655 8051 3657 8058 3665 8056 3664 8055
      3666 8050 3665 8049 3669 8046 3670 8008
      3666 8006 3654 8005 3654 8034

RAB

Local storm report, May 1, 7:00 PM EDT, 1 hour before

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Special weather statement, May 1, 7:06 PM EDT, 54 minutes before

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Local storm report, May 1, 7:48 PM EDT, 12 minutes before

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Local storm report, May 1, 7:57 PM EDT, 3 minutes before

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Special weather statement, May 1, 8:00 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
May 2, 5:13 PM EDT	Special Weather Statement	RNK	City of Martinsville	62 min
May 2, 5:16 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick, City of Martinsville	59 min
May 2, 6:26 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	26 min
May 2, 6:41 PM EDT	Special Weather Statement	RNK	Bedford	49 min
May 2, 7:03 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	42 min
May 2, 7:09 PM EDT	Special Weather Statement	RNK	Rockbridge	36 min
May 2, 7:46 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	59 min
May 2, 2:08 PM EDT	Special Weather Statement	RNK	Wilkes	22 min
May 2, 3:38 PM EDT	Special Weather Statement	RNK	Watauga	37 min

Nearby

Special Weather Statements in Virginia, 2012 Every special weather statement in 2012

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.