Alert archive / Virginia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 233, NWS Blacksburg, VA

July 26, 2007Alleghany County, Bath County, City of Covington, Virginia; Monroe County, West Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 26, 2007, 11:33 PM EDT for Alleghany County, Bath County, City of Covington, Virginia; Monroe County, West Virginia. 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: Jul 26, 2007, 11:33 PM EDT (03:33 UTC)
Expired: Jul 27, 2007, 12:28 AM EDT
In force: 55 min
Issued by: NWS Blacksburg, VA
Area: Counties, with a storm outline in the text

Counties Alleghany County, VA, Bath County, VA, City of Covington, VA, Monroe County, WV

The radar

The Roanoke radar (KFCX), 80 km from the middle of the area, began a volume at 03:33 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 3.6 hours before the alert went out and 87 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: 1555 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 868 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KRNK 270334
SVRRNK
VAC005-017-580-WVC063-270445-
/O.NEW.KRNK.SV.W.0233.070727T0333Z-070727T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
1133 PM EDT THU JUL 26 2007

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CITY OF COVINGTON IN WEST CENTRAL VIRGINIA
  BATH COUNTY IN WEST CENTRAL VIRGINIA
  MONROE COUNTY IN SOUTHEAST WEST VIRGINIA
  ALLEGHANY COUNTY IN WEST CENTRAL VIRGINIA

* UNTIL 1245 AM EDT

* AT 1129 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR   
  WOLFCREEK...OR ABOUT NEAR ALDERSON...AND MOVING EAST NORTHEAST AT  
  20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CALLAGHAN...
  CARLOOVER...
  INGALLS FIELD...
  MILLBORO...
  YOST...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

PLEASE SEND YOUR REPORTS OF PENNY OR LARGER SIZED HAIL...AS WELL AS
WIND DAMAGE...INCLUDING TREES OR LARGE LIMBS DOWNED BY CALLING THE
NATIONAL WEATHER SERVICE TOLL FREE AT...1...8 6 6...2 1 5...4 3 2 4.

LAT...LON 3745 8082 3743 8070 3751 8044 3763 8014
      3765 8010 3782 7968 3814 7946 3818 7959
      3824 7982 3781 8016 3767 8030 3766 8064

$$

KM

1 follow-up statement

000 
WWUS51 KRNK 270428
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1228 AM EDT FRI JUL 27 2007

VAC005-017-580-WVC063-270438-
/O.CAN.KRNK.SV.W.0233.000000T0000Z-070727T0445Z/
CITY OF COVINGTON VA-BATH VA-MONROE WV-ALLEGHANY VA-
1228 AM EDT FRI JUL 27 2007

...THE SEVERE THUNDERSTORM WARNING FOR THE CITY OF 
COVINGTON...ALLEGHANY...MONROE AND BATH COUNTIES IS CANCELLED...THE 
STORM HAS WEAKENED BELOW SEVERE LIMITS.

WE NEED YOUR HELP PLEASE CALL...1 8 6 6...2 1 5...4 3 2 4...TO 
REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG.

LAT...LON 3745 8082 3743 8070 3751 8044 3763 8014
      3765 8010 3782 7968 3814 7946 3818 7959
      3824 7982 3781 8016 3767 8030 3766 8064

$$

KM

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 26, 9:40 PM EDT, 1 hour 53 minutes earlier.

Area forecast discussion, Jul 26, 9:40 PM EDT, 1 hour 53 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
940 PM EDT THU JUL 26 2007

.SYNOPSIS...
HIGH PRESSURE WILL BE OFF THE MID ATLANTIC COAST TONIGHT. ON
FRIDAY AND SATURDAY...A LOW PRESSURE SYSTEM WILL MOVE FROM THE
UPPER MISSISSIPPI VALLEY INTO THE OHIO VALLEY.

&&

.NEAR TERM /THROUGH FRIDAY/...
MCS CROSSING WV RATHER IMPRESSIVE WITH 76 MPH WIND GUST AT YEAGER
AIRPORT. STORMS ARE FOLLOWING ALONG RIDGE OF HIGHER CAPE WHICH
RUNS FROM CRW-HSP. 01Z LAPS STILL SHOWS RIBBON OF 2000-2500 J/KG
INTO THE VA HIGHLANDS...AND THUS THINK TSTMS WILL CONTINUE UNTIL
REACHING END OF AVAILABLE ENERGY B4 WANING.

ASIDE FROM MCS...OTHER ACTIVITY WHICH BUBBLED UP ALONG THE BLUE
RIDGE HAS DIMINISHED. SOME CAPE STILL SHOWING UP ALONG BLUE RIDGE
FROM MEADOWS OF DAN VA TO DEEP GAP NC...AND WILL MAINTAIN CHC POPS
THIS AREA FOR A WHILE LONGER.

GIVEN MOIST BOUNDARY LAYER...ANTICIPATE FORMATION OF LATE NIGHT
FOG...SOME OF WHICH COULD BE DENSE IN THE MTN VALLEYS. DEWPOINTS
ARE CONSIDERABLY HIGHER...MUGGY COMPARED TO THE LAST SEVERAL NIGHTS.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/...
THE UPPER LEVEL CLOSED LOW...WHICH HAS PLAGUED THE AREA THE LAST
COUPLE OF DAYS...WILL MOVE FROM THE GREAT LAKES AND OPEN UP OVER THE
OHIO VALLEYS FRIDAY. A STRONG SHORT WAVE DEVELOPING OVER THE MID
WEST WILL TRACK WITH THIS UPPER LEVEL TROUGH INTO THE OHIO VALLEY.
THIS WILL BE THE AREA OF FOCUS FOR SEVERE WEATHER FRIDAY AND FRIDAY
NIGHT. OVER THE IMMEDIATE AREA...SCATTERED PULSE STORMS ARE POSSIBLE
ONCE AGAIN OVER THE MOUNTAINS. WITH MORE SUNSHINE EXPECTED...TEMPERATURES
WILL RETURN TO NORMAL LEVELS. INCREASED POPS AND EXTENDED EAST FOR
FRIDAY NIGHT INTO SATURDAY. WENT WITH LIKELY POPS FOR SATURDAY IN
THE WEST...WHICH MATCHS UP NICELY WITH GSP AND RLX. CONTINUED CHC POPS
FOR SATURDAY NIGHT WITH FRONTAL BOUNDARY DRIFTING SOUTH THRU REGION.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
UNSETTLED WEATHER WILL CONTINUE IN THE MEDIUM RANGE. FOLLOWED
HPCGUIDE FOR EXTENDED PERIOD WHICH WAS A BLEND OF 00Z ECMWF AND
NCEP-GEF ENSEMBLE MEAN. HIGH PRESSURE MOVES ACROSS EASTERN CANADA
THIS WEEKEND...AND WEAKENS UPPER LEVEL LOW AS IT BECOMES ABSORBED
INTO EASTERN TROF. A COLD FRONT WILL REACH THE WESTERN MOUNTAINS
SATURDAY NIGHT INTO SUNDAY AND STALL ACROSS SOUTHEAST U.S. ON MONDAY
INTO WEDNESDAY...AS SURFACE WAVES MOVE NORTHEAST ALONG THE BOUNDARY.

&&

.AVIATION /02Z FRIDAY THROUGH TUESDAY/...
ISOLATED SHOWERS AND STORMS WILL CONTINUE THROUGH THE EVENING
HOURS OVER SOUTHEAST WEST VIRGINIA AND NEIGHBORING PARTS OF
SOUTHWEST VIRGINIA. ACROSS MOST LOCATIONS...ESPECIALLY ALONG
RIVER VALLEYS AND LOW LYING AREAS...MVFR FOG DEVELOPMENT WILL BE
COMMON BY MIDNIGHT WITH SOME AREAS REACHING IFR OR LOWER TOWARDS
DAWN.

VISIBILITIES SHOULD IMPROVE TO VFR BY MID-MORNING ACROSS THE AREA
WITH SCATTERED SHOWERS AND STORMS REDEVELOPING IN THE MOUNTAINS IN
THE MID-AFTERNOON.

FRIDAY NIGHT AND SATURDAY A STRONG SHORT WAVE BRINGS A LOW FROM
THE UPPER MISSISSIPPI VALLEY INTO VIRGINA. WIDESPREAD SHOWERS AND
THUNDERSTORMS ARE LIKELY IN THE MOUNTAINS...RESULTING IN MVFR
CONDITIONS.

&&

.RNK WATCHES/WARNINGS/ADVISORIES...
VA...NONE.
NC...NONE.
WV...NONE.

&&

SYNOPSIS...AMS
NEAR TERM...PM/RCS
SHORT TERM...KK/RCS
LONG TERM...KK
AVIATION...DS/RCS

Hazardous weather outlook, Jul 26, 2:59 PM EDT, 8 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
259 PM EDT THU JUL 26 2007

NCZ003>006-019-020-VAZ011-013-014-016>018-022>024-032>035-043>047-
058-059-271900-
SURRY-STOKES-ROCKINGHAM-CASWELL-WILKES-YADKIN-GILES-PULASKI-
MONTGOMERY-CARROLL-FLOYD-CRAIG-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-
FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-APPOMATTOX-
BUCKINGHAM-HALIFAX-CHARLOTTE-
259 PM EDT THU JUL 26 2007

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME...ALTHOUGH ISOLATED
THUNDERSTORMS LATE THIS AFTERNOON AND THIS EVENING COULD BE
STRONG.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

NCZ001-002-018-VAZ007-009-010-012-015-019-020-WVZ042>045-271900-
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-WYTHE-GRAYSON-
ALLEGHANY VA-BATH-MERCER-SUMMERS-MONROE-GREENBRIER-
259 PM EDT THU JUL 26 2007

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING. THE PRIMARY THREAT FROM THESE STORMS WILL BE LARGE HAIL
AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND EARLY EVENING.

In the hours before

Special weather statement, Jul 26, 6:03 PM EDT, 5 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
603 PM EDT THU JUL 26 2007

VAZ010-262345-
BLAND-
INCLUDING THE CITY OF...BLAND
603 PM EDT THU JUL 26 2007

...PONDING OF WATER POSSIBLE...

A NEARLY STATIONARY THUNDERSTORM WAS OVER THE CENTRAL PORTION OF
BLAND COUNTY FROM JUST WEST OF BASTIAN TO JUST WEST OF KIMBERLING.
PONDING OF WATER ON ROADS MY OCCUR IN THIS REGION...WHICH
INCLUDED THE INTERSTATE 77 CORRIDOR BETWEEN BLAND AND HICKSVILLE.

MOTORISTS ARE URGED TO BE ALERT FOR RAPIDLY CHANGING VISIBILITY
DUE TO THE HEAVY RAIN...AND ALSO FOR ANY PONDING CONDITIONS WHICH
MAY EXISTS.

Local storm report, Jul 26, 6:47 PM EDT, 4 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
647 PM EDT THU JUL 26 2007

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

0415 PM     HAIL             BEECH MOUNTAIN          36.21N 81.89W
07/26/2007  E1.00 INCH       WATAUGA            NC   LAW ENFORCEMENT

0430 PM     FLASH FLOOD      BEECH MOUNTAIN          36.21N 81.89W
07/26/2007                   WATAUGA            NC   LAW ENFORCEMENT

            15 GRAVEL ROADS WASHED OUT. MAIN HIGHWAY TO THE MOUNTAIN
            CLOSED BY DEBRIS. 2 TO 3 INCHES OF RAIN FELL BETWEEN 330
            AND 430 PM LST.

&&

11

Special weather statement, Jul 26, 9:43 PM EDT, 1 hour 50 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
943 PM EDT THU JUL 26 2007

WVZ042>045-270430-
MERCER-SUMMERS-MONROE-GREENBRIER-
INCLUDING THE CITIES OF...BLUEFIELD...HINTON...UNION...LEWISBURG
943 PM EDT THU JUL 26 2007

...LINE OF STRONG THUNDERSTORMS MOVING TOWARDS FAR SOUTHEAST WEST VIRGINIA...

AROUND 1100 PM TO 1130 PM...STRONG THUNDERSTORMS WILL BE NEAR A
LINE FROM CAMP CREEK STATE PARK...TO PIPESTEM STATE PARK...TO
HINTON...TO RAINELLE AND TROUT WEST VIRGINIA. THE APPROACHING LINE
OF STORMS HAS HAD A HISTORY OF LARGE HAIL AND DAMAGING WINDS. IF
THE STORMS MAINTAIN THEIR INTENSITY AS THEY PROGRESS INTO THE
REGION...SEVERE THUNDERSTORM WARNINGS MAY NEED TO BE ISSUED.

DS

Special weather statement, Jul 26, 10:28 PM EDT, 1 hour 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1028 PM EDT THU JUL 26 2007

WVZ042>045-270330-
MERCER WV-MONROE WV-GREENBRIER WV-SUMMERS WV-
1028 PM EDT THU JUL 26 2007

AT 1025 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTH OF
RICHWOOD TO 7 MILES SOUTHEAST OF PINEVILLE...MOVING EAST AT 25 MPH.

THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...QUINWOOD AT 1035 PM
EDT...RAINELLE AT 1040 PM EDT...RUPERT...AT 1050 PM EDT...CAMP CREEK
STATE PARK...SANDSTONE AT 1055 PM EDT...AND EVENTUALLY MOVE INTO THE
LEWISBURG AND UNION AREAS BETWEEN 11:00 PM AND MIDNIGHT.

WITH THE PASSAGE OF THIS LINE OF STORMS EXPECT WIND GUSTS TO 35
MILES AN HOUR...A HEAVY DOWNPOUR OF RAIN...AND FREQUENT CLOUD TO
GROUND LIGHTNING.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR
UPDATES ON THIS DEVELOPING SITUATION.

11

Local storm report, Jul 26, 10:47 PM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1047 PM EDT THU JUL 26 2007

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

1043 PM     HAIL             RAINELLE                37.97N 80.78W
07/26/2007  E0.75 INCH       GREENBRIER         WV   PUBLIC

&&

MATTAROCHIA

Local storm report, Jul 26, 10:55 PM EDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1055 PM EDT THU JUL 26 2007

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

1054 PM     HAIL             RAINELLE                37.97N 80.78W
07/26/2007  E1.00 INCH       GREENBRIER         WV   PUBLIC

            HAIL FROM DIME SIZE TO QUARTER SIZE.

&&

MATTAROCHIA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 1:00 AM EDT	Severe Thunderstorm Warning	RNK	Craig	25 min
Jul 27, 1:26 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery, City of Radford	55 min
Jul 27, 1:37 PM EDT	Severe Thunderstorm Warning	RNK	Giles	48 min
Jul 27, 1:42 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	78 min
Jul 27, 2:40 PM EDT	Severe Thunderstorm Warning	RNK	Roanoke, City of Roanoke, City of Salem	47 min
Jul 27, 2:47 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	58 min
Jul 27, 3:29 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	76 min
Jul 27, 4:37 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania, City of Danville	38 min
Jul 27, 4:42 PM EDT	Severe Thunderstorm Warning	RNK	Bath	63 min
Jul 27, 4:50 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	69 min
Jul 27, 5:01 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Charlotte	62 min
Jul 26, 10:39 PM EDT	Severe Thunderstorm Warning	RNK	Greenbrier	81 min
Jul 26, 10:47 PM EDT	Severe Thunderstorm Warning	RNK	Summers	73 min
Jul 26, 11:01 PM EDT	Severe Thunderstorm Warning	RNK	Mercer	37 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2007 Severe Thunderstorm Warnings in West Virginia, 2007 Every severe thunderstorm warning in 2007

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.