Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

July 15, 2012City of Roanoke, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 15, 2012, 2:44 PM EDT for City of Roanoke, Virginia. It was in force for 31 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 15, 2012, 2:44 PM EDT (18:44 UTC)
Expired: Jul 15, 2012, 3:15 PM EDT
In force: 31 min
Issued by: NWS Blacksburg, VA

County City of Roanoke, VA

The radar

The Roanoke radar (KFCX), 46 km from the middle of the area, began a volume at 18:48 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, 6.7 hours before the alert went out and 28 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: 456 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 865 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 15, 12:23 PM EDT, 2 hours 21 minutes earlier.

Area forecast discussion, Jul 15, 12:23 PM EDT, 2 hours 21 minutes before

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Hazardous weather outlook, Jul 15, 3:20 AM EDT, 11 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
320 AM EDT SUN JUL 15 2012

NCZ001>004-018>020-VAZ007-009>020-022>024-032>035-045>047-WVZ042>045-
160730-
ASHE-ALLEGHANY NC-SURRY-STOKES-WATAUGA-WILKES-YADKIN-TAZEWELL-SMYTH-
BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-
ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-FRANKLIN-
BEDFORD-AMHERST-CAMPBELL-APPOMATTOX-BUCKINGHAM-MERCER-SUMMERS-MONROE-
GREENBRIER-
320 AM EDT SUN JUL 15 2012

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

.DAY ONE...TODAY AND TONIGHT.

SLOW MOVING THUNDERSTORMS COULD PRODUCE VERY HEAVY RAINFALL AND
LOCALIZED FLOODING THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ005-006-VAZ043-044-058-059-160730-
ROCKINGHAM-CASWELL-HENRY-PITTSYLVANIA-HALIFAX-CHARLOTTE-
320 AM EDT SUN JUL 15 2012

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

.DAY ONE...TODAY AND TONIGHT.

ISOLATED THUNDERSTORMS COULD PRODUCE VERY HEAVY RAINFALL AND
LOCALIZED FLOODING THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 15, 12:58 PM EDT, 1 hour 46 minutes before

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Special weather statement, Jul 15, 1:16 PM EDT, 1 hour 28 minutes before

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Special weather statement, Jul 15, 1:52 PM EDT, 52 minutes before

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Special weather statement, Jul 15, 2:18 PM EDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
218 PM EDT SUN JUL 15 2012

VAZ032-151900-
PATRICK VA-
218 PM EDT SUN JUL 15 2012

...A STRONG THUNDERSTORM WILL AFFECT PATRICK COUNTY...

AT 213 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES EAST OF
ARARAT...MOVING EAST AT 5 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

AN INCH OF RAIN COULD FALL IN AS LITTLE AS 15 MINUTES.

THIS STORM WILL BE NEAR STUART AROUND 300 PM.

LAT...LON 3657 8059 3665 8060 3666 8056 3664 8055
      3666 8050 3665 8049 3669 8046 3675 8028
      3655 8016

Special weather statement, Jul 15, 2:35 PM EDT, 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
235 PM EDT SUN JUL 15 2012

NCZ003-004-151900-
STOKES NC-SURRY NC-
235 PM EDT SUN JUL 15 2012

...A STRONG THUNDERSTORM WILL AFFECT STOKES AND SURRY COUNTIES...

AT 231 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER MOUNT AIRY...
MOVING EAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR WOODVILLE AROUND 250 PM...WESTFIELD AROUND
255 PM AND FRANCISCO AROUND 300 PM.

LAT...LON 3648 8063 3656 8060 3655 8035 3654 8032
      3647 8038

Special weather statement, Jul 15, 2:44 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
244 PM EDT SUN JUL 15 2012

VAZ022-034-151915-
BEDFORD VA-ROANOKE VA-
244 PM EDT SUN JUL 15 2012

...A STRONG THUNDERSTORM WILL AFFECT BEDFORD AND ROANOKE COUNTIES...

AT 243 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF STEWARTSVILLE...MOVING EAST AT 5 MPH.

WIND GUSTS TO 50 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS
STORM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE
WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL
STREAMS.

THIS STORM WILL BE NEAR STEWARTSVILLE AROUND 315 PM.

LAT...LON 3720 7973 3720 7978 3724 7979 3721 7981
      3723 7982 3721 7984 3723 7985 3720 7989
      3720 7993 3726 7992 3729 7974

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 12:54 PM EDT	Special Weather Statement	RNK	City of Martinsville	66 min
Jul 15, 12:58 PM EDT	Special Weather Statement	RNK	Bath	47 min
Jul 15, 1:16 PM EDT	Special Weather Statement	RNK	Cumberland	59 min
Jul 15, 1:52 PM EDT	Special Weather Statement	RNK	Carroll	23 min
Jul 15, 2:18 PM EDT	Special Weather Statement	RNK	Patrick	42 min
Jul 15, 2:47 PM EDT	Special Weather Statement	RNK	City of Lexington	28 min
Jul 15, 3:17 PM EDT	Special Weather Statement	RNK	Montgomery	28 min
Jul 15, 3:21 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	24 min
Jul 15, 3:32 PM EDT	Special Weather Statement	RNK	Bath	28 min
Jul 15, 3:42 PM EDT	Special Weather Statement	RNK	Pittsylvania	33 min
Jul 15, 4:16 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Lexington	29 min
Jul 15, 4:27 PM EDT	Special Weather Statement	RNK	Nelson	18 min
Jul 15, 4:32 PM EDT	Special Weather Statement	RNK	Pulaski	28 min
Jul 15, 4:46 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	29 min
Jul 15, 4:54 PM EDT	Special Weather Statement	RNK	Buckingham	51 min
Jul 15, 5:43 PM EDT	Severe Thunderstorm Warning	RNK	Buckingham	27 min
Jul 15, 2:35 PM EDT	Special Weather Statement	RNK	Surry	25 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.