Alert archive / West Virginia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 38, NWS Blacksburg, VA

May 23, 2007Summers County, West Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 23, 2007, 5:37 PM EDT for Summers County, West Virginia. It was in force for 53 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 23, 2007, 5:37 PM EDT (21:37 UTC)
Expired: May 23, 2007, 6:30 PM EDT
In force: 53 min
Issued by: NWS Blacksburg, VA
Area: Counties, with a storm outline in the text

County Summers County, WV

The radar

The Roanoke radar (KFCX), 89 km from the middle of the area, began a volume at 21:38 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.

What was reported inside it

Time	Report	Where	Remark
May 23, 5:45 PM EDT	TSTM WND DMG	3 Ne Talcott, WV	LARGE TREE DOWN ON ROUTE 3 IN PENCE SPRINGS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 8 minutes after it went out.

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 12:00Z, 9.6 hours before the alert went out and 129 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: 115 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 55 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.

000 
WUUS51 KRNK 232136
SVRRNK
WVC089-232230-
/O.NEW.KRNK.SV.W.0038.070523T2137Z-070523T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
537 PM EDT WED MAY 23 2007

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL SUMMERS COUNTY IN SOUTHEAST WEST VIRGINIA

* UNTIL 630 PM EDT

* AT 534 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR TALCOTT...OR ABOUT 6 MILES SOUTHWEST OF
  ALDERSON...AND MOVING WEST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GLENRAY...
  TALCOTT...
  HIX...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

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 3776 8066 3771 8066 3757 8077 3756 8099
      3769 8092 3770 8090 3768 8089 3769 8087
      3773 8089 3780 8085

$$

KK

2 follow-up statements

000 
WWUS51 KRNK 232158
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
557 PM EDT WED MAY 23 2007

WVC089-232230-
/O.CON.KRNK.SV.W.0038.000000T0000Z-070523T2230Z/
SUMMERS WV-
557 PM EDT WED MAY 23 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL SUMMERS COUNTY...

AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. 
THIS STORM WAS LOCATED NEAR TALCOTT...OR ABOUT 7 MILES SOUTHWEST OF 
ALDERSON. THIS STORM WAS MOVING WEST AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GLENRAY...BLUESTONE STATE PARK...BLUESTONE DAM...HIX AND HINTON.

LAT...LON 3776 8066 3771 8066 3757 8077 3756 8099
      3769 8092 3770 8090 3768 8089 3769 8087
      3773 8089 3780 8085

$$


07

000 
WWUS51 KRNK 232221
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
620 PM EDT WED MAY 23 2007

WVC089-232230-
/O.EXP.KRNK.SV.W.0038.000000T0000Z-070523T2230Z/
SUMMERS WV-
620 PM EDT WED MAY 23 2007

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SUMMERS COUNTY EXPIRES
AT 630 PM EDT...

THUNDERSTORM IS EXPECTED TO WEAKEN BY 630 PM. ADDITIONAL SHOWERS AND
THUNDERSTORMS ARE POSSIBLE THIS EVENING.

TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4.

LAT...LON 3776 8066 3771 8066 3757 8077 3756 8099
      3769 8092 3770 8090 3768 8089 3769 8087
      3773 8089 3780 8085

$$

KK

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 May 23, 3:01 PM EDT, 2 hours 36 minutes earlier.

Area forecast discussion, May 23, 3:01 PM EDT, 2 hours 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
301 PM EDT WED MAY 23 2007

.SYNOPSIS...
A LARGE HIGH PRESSURE SYSTEM OFF THE NEW ENGLAND COAST WILL BUILD
DOWN THE EAST COAST THROUGH THURSDAY AND EXTEND INLAND OVER THE
SOUTHEAST U.S. INTO THE WEEKEND.

&&

.NEAR TERM /THROUGH TONIGHT/...
SCATTERED THUNDERSTORMS OCCURRING ACROSS THE MOUNTAINS THIS
AFTERNOON AND A COUPLE OF THESE STORMS MAY APPROACH SEVERE WITH
CAPES FCST OVER 2000 J/KG. WITHOUT UPPER LEVEL SUPPORT...EXPECT
THESE STORMS TO DISSIPATE SHORTLY AFTER SUNSET. WENT A DEGREE OR
TWO ABOVE GUIDANCE FOR LOWS TONIGHT BASED ON THE PAST COOL BIAS
SHOWN BY GUIDANCE OVER THE PAST COUPLE OF NIGHTS.

&&

.SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/...
UPPER RIDGE WILL BE THE DOMINATE WEATHER FEATURE INTO
SATURDAY...ALTHOUGH RIDGE WILL BEGIN TO WEAKEN TOWARD THE END OF
THE SHORT TERM PERIOD AS A STRONG UPPER LEVEL SHORT WAVE PUSHES
EAST NORTH OF THE GREAT LAKES. WITH WARMING TEMPERATURES ALOFT
WITH BUILDING RIDGE AND LOW LEVEL THETA-E RIDGE SHOVED EAST AS SFC
RIDGE BUILDS...ANY PRECIP CHANCES SHOULD BE NORTH AND WEST OF THE
FORECAST AREA. SOUTHEAST FLOW THURSDAY AND SIMILAR 1000-850MB
THICKNESSES COMPARED TO TODAY SHOULD KEEP HIGHS THURSDAY
COMPARABLE TO TODAYS VALUES.

LOW LEVEL FLOW BECOMES SOUTHWEST OF FRIDAY...AND WITH 1000-850MB
THICKNESSES INCREASING...WENT WARMER THAN GUIDANCE FOR HIGHS. BOTH
GFS/NAM DEVELOP WEAK SFC CONVERGENCE LINE ACROSS THE ALLEGHANY
HIGHLANDS. THIS WEAK CONVERGENCE IN CLOSE PROXIMITY TO A LOW LEVEL
THETA-E RIDGE MAY BE ENOUGH TO BREAK WEAK CAP...SO KEPT A SLIGHT
CHANCE OF POPS IN THE NORTHEAST.

EVEN WARMER TEMPERATURES ANTICIPATED SATURDAY WITH CLIMBING
1000-850MB THICKNESSES. FORECAST SOUNDINGS SHOW STRENGTHENING MID
LEVEL CAP WHICH SHOULD KEEP A LID ON THUNDERSTORM DEVELOPMENT.
&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
LONG RANGE MODELS IN GOOD AGREEMENT BREAKING DOWN RIDGE SUNDAY
WITH NEXT SHORTWAVE MOVING THROUGH THE GREAT LAKES...WHICH HELPS
PUSH A COLD FRONT INTO THE EXTREME NRN PORTION OF THE FORECAST
AREA BY MONDAY MORNING. MODELS DIVERGE ON TUESDAY WITH
ECMWF/CANADIAN MODELS KEEPING A MORE PRONOUNCED UPPER TROF OFF THE
ATLANTIC COAST...WHICH KEEPS SFC BOUNDARY IN THE AREA. THIS FRONT
FINALLY LIFTS WEDNESDAY WITH RIDGE RE-BUILDING IN ADVANCE OF SHORT
WAVE MOVING NORTH OF THE GREAT LAKES IN CANADA. WITH SFC BOUNDARY IN
THE AREA...EXPECT BEST CHANCE OF PRECIP DURING THE PERIOD MONDAY
AND TUESDAY...AND KEPT POPS GOING FOR WEDNESDAY FOR ALL BUT THE
SOUTHERN PORTION OF THE FORECAST AREA.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
VFR CONDITIONS WILL PREVAIL THIS AFTERNOON WITH SCTD TSTMS IN THE
WEST. MOVEMENT OF THE STORMS WILL BE CLOSE TO NIL WITH THE UPPER
RIDGE OVERHEAD. WIDELY SCTD STORMS ALREADY DEVELOPING OVER THE
WEST...EXPECTING COVERAGE TO GRADUALLY INCREASE THROUGH 4PM.
COVERAGE SHOULD BE ENOUGH FOR VCNTY TSTMS INTO THE BLF AND LWB
TAFS THROUGH THIS EVENING. BY LATE EVENING...CONVECTION WILL
SUBSIDE DUE TO LOSS OF HEATING.

WITH LITTLE CHANGE IN AIRMASS LATELY AND ABUNDANT LOW LEVEL MOISTR
IN THE AIR...IFR FOG IS LIKELY TNGT AT LWB. STRATUS CEILINGS MAY
ALSO DEVELOP TOWARD MORNING...BUT DO NOT THINK THE CHANCE IS HIGH
ENOUGH TO PUT IN THE TAFS AT THIS TIME.

FOR THURSDAY THROUGH SUNDAY...NO SIG WX EXPECTED. CONVECTIVE
COVERAGE SHOULD BE LESS WITH THE UPPER RIDGE BUILDING AND WARMING
TEMPS ALOFT.

&&

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

&&

SYNOPSIS...PH
NEAR TERM...JS/PH
SHORT TERM...PH
LONG TERM...PH
AVIATION...JS

Hazardous weather outlook, May 23, 8:26 AM EDT, 9 hours 11 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
826 AM EDT WED MAY 23 2007

NCZ003>006-019-020-VAZ032>035-043>047-058-059-241230-
SURRY-STOKES-ROCKINGHAM-CASWELL-WILKES-YADKIN-PATRICK-FRANKLIN-
BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-
HALIFAX-CHARLOTTE-
826 AM EDT WED MAY 23 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...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ001-002-018-VAZ007-009>020-022>024-WVZ042>045-241230-
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-
826 AM EDT WED MAY 23 2007

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

.DAY ONE...TODAY AND TONIGHT

WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP FROM THE BLUE RIDGE
WEST THIS AFTERNOON. SIMILAR TO MONDAY...MODERATE INSTABILITY
OVER THE HIGHER ELEVATIONS WILL LIKELY LEAD TO A FEW OF THESE
STORMS BECOMING SEVERE WITH LARGE HAIL AND DAMAGING WINDS. AREAS
IN SOUTHEAST WEST VIRGINIA...AS WELL AS FAR SOUTHWEST VIRGINIA AND
NORTHWEST NORTH CAROLINA WEST OF INTERSTATE 77 STAND THE BEST
CHANCE OF SEEING THUNDERSTORMS TODAY AND POSSIBLY A SEVERE STORM.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, May 23, 3:06 PM EDT, 2 hours 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
306 PM EDT WED MAY 23 2007

NCZ001-232000-
ASHE NC-
306 PM EDT WED MAY 23 2007

AT 305 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES EAST OF LANSING...OR ABOUT 5 MILES SOUTH
OF GRASSY CREEK...MOVING SOUTHWEST AT 10 MPH. THE STRONG THUNDERSTORM
WILL BE NEAR CLIFTON BY 335 PM.

WIND GUSTS TO 45 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
RAINFALL AMOUNTS UP TO ONE INCH ARE POSSIBLE. PONDING OF WATER IS
POSSIBLE IN POOR DRAINAGE AND LOW LYING AREAS.

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

07

Local storm report, May 23, 4:21 PM EDT, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
421 PM EDT WED MAY 23 2007

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

0405 PM     HAIL             SANDLICK                37.33N 81.22W
05/23/2007  E0.88 INCH       MERCER             WV   PUBLIC

&&

JWHITE

Special weather statement, May 23, 4:37 PM EDT, 1 hour before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
437 PM EDT WED MAY 23 2007

VAZ007-010-232130-
BLAND VA-TAZEWELL VA-
437 PM EDT WED MAY 23 2007

AT 434 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES NORTHWEST OF BLAND...OR ABOUT OVER
SUITER...MOVING WEST AT 5 MPH. THE STRONG THUNDERSTORM WILL BE
NEAR...BLUEFIELD AT 505 PM EDT...BURKES GARDEN...GRATTON AT 530 PM
EDT...

EXPECT A WIND GUST TO 50 MPH...SMALL HAIL AND FREQUENT DANGEROUS
LIGHTNING IN THE PATH OF THIS STORM. RAINFALL AMOUNTS UP TO AN INCH
ARE POSSIBLE WITH THIS STORM.

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

KK

Special weather statement, May 23, 5:11 PM EDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
511 PM EDT WED MAY 23 2007

VAZ007-009-232215-
SMYTH VA-TAZEWELL VA-
511 PM EDT WED MAY 23 2007

AT 509 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES SOUTHWEST
OF BURKES GARDEN TO 8 MILES NORTH OF MARION...MOVING WEST AT 15 MPH.
THE LINE OF STRONG THUNDERSTORMS WILL BE NEAR...HUNGRY MOTHER STATE
PARK AT 520 PM EDT...ASBERRYS AT 535 PM EDT...BROADFORD AT 550 PM
EDT...SALTVILLE...QUARRY AT 610 PM EDT...CLAYPOOL HILL AT 615 PM
EDT...

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORM.
RAINFALL AMOUNTS UP TO INCH ARE POSSIBLE WITH THESE THUNDERSTORMS.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR
UPDATES ON THESE STORM.

KK

Local storm report, May 23, 5:29 PM EDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
529 PM EDT WED MAY 23 2007

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

0522 PM     HAIL             RENICK                  37.98N 80.37W
05/23/2007  M0.88 INCH       GREENBRIER         WV   TRAINED SPOTTER

&&

JWHITE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 3:48 PM EDT	Severe Thunderstorm Warning	RNK	Mercer	57 min
May 23, 5:12 PM EDT	Severe Thunderstorm Warning	RNK	Greenbrier	63 min

Nearby

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.