Alert archive / Virginia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 123, NWS Blacksburg, VA

July 17, 2013Bedford County, Botetourt County, Rockbridge County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 17, 2013, 3:05 PM EDT for Bedford County, Botetourt County, Rockbridge County, 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 counties it named.

The facts

Issued
Jul 17, 2013, 3:05 PM EDT (19:05 UTC)
Expired
Jul 17, 2013, 4:00 PM EDT
In force
55 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon

Counties Bedford County, VA, Botetourt County, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 85 km from the middle of the area, began a volume at 19:07 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, 7.1 hours before the alert went out and 41 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2013-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1223 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2013-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1223 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
946 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 17, 12:59 PM EDT, 2 hours 6 minutes earlier.

Area forecast discussion, Jul 17, 12:59 PM EDT, 2 hours 6 minutes before
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Hazardous weather outlook, Jul 17, 3:38 AM EDT, 11 hours 27 minutes before
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In the hours before

Special weather statement, Jul 17, 1:38 PM EDT, 1 hour 27 minutes before
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Special weather statement, Jul 17, 2:02 PM EDT, 1 hour 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
202 PM EDT WED JUL 17 2013

NCZ020-171845-
YADKIN NC-
202 PM EDT WED JUL 17 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  YADKIN COUNTY IN NORTHWEST NORTH CAROLINA...

* UNTIL 245 PM EDT

* AT 158 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM NEAR NEBO...MOVING TO THE SOUTHWEST AT 20
  MPH.

* PEA SIZE HAIL AND WIND GUSTS UP TO 30 MPH ARE EXPECTED WITH THIS
  STORM. VERY HEAVY RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON
  ROADWAYS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
  EXPECT FREQUENT CLOUD TO GROUND LIGHTNING WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  YADKINVILLE...
  BOONVILLE...
  EAST BEND...
  LONE HICKORY...
  AND JONESVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT STAY IN THE OPEN OR SHELTER UNDER TREES WHEN LIGHTNING
THREATENS. SEEK SHELTER INSIDE A STURDY BUILDING OR IN A VEHICLE.

&&

LAT...LON 3606 8088 3623 8087 3627 8068 3625 8067
      3625 8065 3626 8065 3628 8062 3627 8059
      3628 8056 3620 8048 3605 8070
TIME...MOT...LOC 1758Z 57DEG 17KT 3624 8062

AS
Local storm report, Jul 17, 2:17 PM EDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
217 PM EDT WED JUL 17 2013

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

0130 PM     TSTM WND DMG     MOUNT AIRY              36.50N 80.61W
07/17/2013                   SURRY              NC   NEWSPAPER

            MULTIPLE TREES DOWN AND SOME STREET FLOODING.

&&

MSPORER
Special weather statement, Jul 17, 2:30 PM EDT, 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
230 PM EDT WED JUL 17 2013

VAZ024-034-035-045-171930-
BEDFORD VA-AMHERST VA-ROCKBRIDGE VA-CAMPBELL VA-
230 PM EDT WED JUL 17 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  CENTRAL BEDFORD COUNTY IN SOUTH CENTRAL VIRGINIA...
  CENTRAL AMHERST COUNTY IN CENTRAL VIRGINIA...
  SOUTHEASTERN ROCKBRIDGE COUNTY IN WEST CENTRAL VIRGINIA...
  NORTHWESTERN CAMPBELL COUNTY IN CENTRAL VIRGINIA...

* UNTIL 330 PM EDT

* AT 228 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM NEAR PLEASANT VIEW...MOVING TO THE SOUTH AT
  25 MPH.

* PEA SIZE HAIL AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS
  STORM. VERY HEAVY RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON
  ROADWAYS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

* LOCATIONS IMPACTED INCLUDE...
  EVINGTON...
  FOREST...
  BEDFORD CITY...
  FORKS OF BUFFALO...
  AND BIG ISLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

&&

LAT...LON 3778 7909 3721 7920 3730 7964 3786 7928
TIME...MOT...LOC 1828Z 21DEG 21KT 3766 7929

KK
Special weather statement, Jul 17, 2:48 PM EDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
248 PM EDT WED JUL 17 2013

VAZ011-WVZ042>044-171945-
GILES VA-SUMMERS WV-MONROE WV-MERCER WV-
248 PM EDT WED JUL 17 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  NORTHWESTERN GILES COUNTY IN SOUTHWEST VIRGINIA...
  SOUTHERN SUMMERS COUNTY IN SOUTHEAST WEST VIRGINIA...
  NORTHWESTERN MONROE COUNTY IN SOUTHEAST WEST VIRGINIA...
  NORTHEASTERN MERCER COUNTY IN SOUTHEAST WEST VIRGINIA...

* UNTIL 345 PM EDT

* AT 245 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM NEAR WOLFCREEK...MOVING TO THE SOUTHWEST AT
  20 MPH.

* PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
  STORM. VERY HEAVY RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON
  ROADWAYS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

* LOCATIONS IMPACTED INCLUDE...
  NARROWS...
  PIPESTEM...
  PETERSTOWN...
  BUCK...
  AND BALLENGEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

&&

LAT...LON 3773 8067 3773 8065 3770 8054 3769 8048
      3767 8045 3729 8082 3750 8110 3776 8067
TIME...MOT...LOC 1845Z 47DEG 19KT 3769 8060

KK
Local storm report, Jul 17, 2:57 PM EDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
257 PM EDT WED JUL 17 2013

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

0254 PM     HEAVY RAIN       MOUNT AIRY              36.50N  80.61W
07/17/2013  M4.50 INCH       SURRY              NC   PUBLIC

            RAIN FELL IN 90 MINUTES

&&

EVENT NUMBER RNK1301446

MBS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 8:05 PM EDTSpecial Weather StatementRNKGiles55 min
Jul 16, 8:59 PM EDTSpecial Weather StatementRNKCarroll46 min
Jul 16, 9:10 PM EDTSpecial Weather StatementRNKBuckingham35 min
Jul 17, 3:06 AM EDTSpecial Weather StatementRNKCampbell, City of Lynchburg39 min
Jul 17, 3:25 AM EDTSpecial Weather StatementRNKCity of Lynchburg35 min
Jul 17, 3:26 AM EDTSpecial Weather StatementRNKPittsylvania34 min
Jul 17, 3:46 AM EDTSpecial Weather StatementRNKCity of Lynchburg29 min
Jul 17, 3:50 AM EDTSpecial Weather StatementRNKPittsylvania25 min
Jul 17, 4:16 AM EDTSpecial Weather StatementRNKCity of Lynchburg29 min
Jul 17, 4:50 AM EDTSpecial Weather StatementRNKCampbell25 min
Jul 17, 12:35 PM EDTSpecial Weather StatementRNKBedford55 min
Jul 17, 1:24 PM EDTSpecial Weather StatementRNKCarroll66 min
Jul 17, 1:30 PM EDTSpecial Weather StatementRNKBath60 min
Jul 17, 1:38 PM EDTSpecial Weather StatementRNKRockbridge, City of Buena Vista, City of Lexington67 min
Jul 17, 2:30 PM EDTSpecial Weather StatementRNKAmherst, Bedford, City of Buena Vista, City of Lynchburg60 min
Jul 17, 3:23 PM EDTSpecial Weather StatementRNKGiles67 min
Jul 17, 3:52 PM EDTSpecial Weather StatementRNKBedford53 min
Jul 17, 4:17 PM EDTSpecial Weather StatementRNKBland, Pulaski, City of Radford58 min
Jul 17, 4:46 PM EDTSpecial Weather StatementRNKPulaski, City of Radford59 min
Jul 17, 4:47 PM EDTSpecial Weather StatementRNKTazewell58 min
Jul 17, 5:07 PM EDTSpecial Weather StatementRNKFranklin, Pittsylvania68 min
Jul 17, 5:29 PM EDTSevere Thunderstorm WarningRNKCarroll, Grayson, Wythe, City of Galax61 min
Jul 17, 5:56 PM EDTSevere Thunderstorm WarningRNKTazewell64 min
Jul 17, 6:20 PM EDTSpecial Weather StatementRNKCity of Martinsville55 min
Jul 17, 6:37 PM EDTSpecial Weather StatementRNKCarroll, Grayson, City of Galax53 min
Jul 17, 7:02 PM EDTSpecial Weather StatementRNKBuckingham58 min
Jul 16, 9:49 PM EDTSpecial Weather StatementRNKSurry26 min
Jul 17, 2:02 PM EDTSpecial Weather StatementRNKYadkin43 min
Jul 17, 2:07 PM EDTAreal Flood AdvisoryRNKSurry4 hr
Jul 17, 3:37 PM EDTSevere Thunderstorm WarningRNKWatauga, Wilkes53 min
Jul 17, 5:04 PM EDTSpecial Weather StatementRNKWatauga56 min
Jul 17, 7:21 PM EDTSevere Thunderstorm WarningRNKAlleghany, Ashe, Wilkes54 min
Jul 17, 7:46 PM EDTFlash Flood WarningRNKAlleghany, Ashe, Surry, Watauga, Wilkes6 hr
Jul 17, 7:57 PM EDTSevere Thunderstorm WarningRNKAshe, Watauga, Wilkes63 min
Jul 17, 2:48 PM EDTSpecial Weather StatementRNKSummers57 min
Jul 17, 5:16 PM EDTSpecial Weather StatementRNKSummers59 min
Jul 17, 7:38 PM EDTSpecial Weather StatementRNKSummers67 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2013Every severe thunderstorm warning in 2013

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.