Alert archive / Virginia / Areal Flood Warnings in 2012

Areal Flood Warning 8, NWS Blacksburg, VA

May 15, 20124 counties in Virginia

NWS Blacksburg, VA issued this areal flood warning at May 15, 2012, 3:15 AM EDT for 4 counties in Virginia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 15, 2012, 3:15 AM EDT (07:15 UTC)
Expired
May 15, 2012, 9:15 AM EDT
In force
6 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

Counties Botetourt County, VA, City of Buena Vista, VA, City of Lexington, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 102 km from the middle of the area, began a volume at 07:14 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, 7.3 hours before the alert went out and 58 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 00:00Z on 2012-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 763 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2012-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.19395878Sfc1 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
763 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
537 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood 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 areal flood warning went out at May 14, 9:33 PM EDT, 5 hours 42 minutes earlier.

Area forecast discussion, May 14, 9:33 PM EDT, 5 hours 42 minutes before
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Hazardous weather outlook, May 14, 9:43 PM EDT, 5 hours 32 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE BLACKSBURG VA
943 PM EDT MON MAY 14 2012

NCZ001-002-005-006-018-VAZ007-009>012-015-044>047-058-059-WVZ042>045-
160145-
ASHE-ALLEGHANY NC-ROCKINGHAM-CASWELL-WATAUGA-TAZEWELL-SMYTH-BLAND-
GILES-WYTHE-GRAYSON-PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-
HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE-GREENBRIER-
943 PM EDT MON MAY 14 2012

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

.DAY ONE...TONIGHT.

BANDS OF SHOWERS AND THUNDERSTORMS MAY RESULT IN VERY HEAVY
RAINFALL INTO THE OVERNIGHT. THE RAIN COULD BE HEAVY ENOUGH TO
CAUSE LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A FEW SLOW MOVING THUNDERSTORMS COULD PRODUCE HEAVY
RAINFALL...MAINLY ALONG THE HIGHER ELEVATIONS...TUESDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ003-004-019-020-VAZ016-032-043-160145-
SURRY-STOKES-WILKES-YADKIN-CARROLL-PATRICK-HENRY-
943 PM EDT MON MAY 14 2012

...FLASH FLOOD WATCH IN EFFECT UNTIL 6 AM EDT TUESDAY...

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

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A FEW SLOW MOVING THUNDERSTORMS COULD PRODUCE HEAVY
RAINFALL...MAINLY ALONG THE HIGHER ELEVATIONS...TUESDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

VAZ013-014-017>020-022-023-160145-
PULASKI-MONTGOMERY-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-
943 PM EDT MON MAY 14 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWEST VIRGINIA AND WEST
CENTRAL VIRGINIA.

.DAY ONE...TONIGHT.

BANDS OF SLOW MOVING SHOWERS AND ISOLATED THUNDERSTORMS COULD
RESULT IN LOCALIZED FLOODING TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A FEW SLOW MOVING THUNDERSTORMS COULD PRODUCE HEAVY
RAINFALL...MAINLY ALONG THE HIGHER ELEVATIONS...TUESDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

VAZ024-033>035-160145-
ROCKBRIDGE-FRANKLIN-BEDFORD-AMHERST-
943 PM EDT MON MAY 14 2012

...FLASH FLOOD WATCH IN EFFECT UNTIL 6 AM EDT TUESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL VIRGINIA...SOUTH
CENTRAL VIRGINIA AND WEST CENTRAL VIRGINIA.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

BANDS OF SLOW MOVING SHOWERS AND ISOLATED THUNDERSTORMS COULD
RESULT IN LOCALIZED FLOODING INTO TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A FEW SLOW MOVING THUNDERSTORMS COULD PRODUCE HEAVY
RAINFALL...MAINLY ALONG THE HIGHER ELEVATIONS...TUESDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, May 14, 9:20 PM EDT, 5 hours 55 minutes before
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Local storm report, May 14, 10:01 PM EDT, 5 hours 14 minutes before
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Local storm report, May 14, 11:00 PM EDT, 4 hours 15 minutes before
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Local storm report, May 14, 11:36 PM EDT, 3 hours 39 minutes before
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Local storm report, May 15, 12:00 AM EDT, 3 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1200 AM EDT TUE MAY 15 2012

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

0955 PM     FLASH FLOOD      2 N MECHANICSBURG       37.18N 80.96W
05/14/2012                   BLAND              VA   EMERGENCY MNGR

            AT LEAST SIX INCHES OF WATER FLOWING OVER PRICE RIDGE
            ROAD

&&

PW
Local storm report, May 15, 2:12 AM EDT, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BLACKSBURG VA
212 AM EDT TUE MAY 15 2012

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

0553 PM     HAIL             4 WSW NORTH WILKESBORO  36.15N 81.21W
05/14/2012  E1.00 INCH       WILKES             NC   PUBLIC

            QUARTER SIZE HAIL BEGAN AT 553 PM AND ENDED AT 600 PM
            EDT...AND ALSO TWO TREES DOWN...ALL OBSERVED AT THE
            INTERSECTION OF CONGO ROAD AND WINKLER MILL ROAD

0556 PM     HAIL             3 WSW NORTH WILKESBORO  36.15N 81.19W
05/14/2012  E1.00 INCH       WILKES             NC   TRAINED SPOTTER

            PENNY TO QUARTER SIZE HAIL.

0605 PM     FLASH FLOOD      3 W NORTH WILKESBORO    36.16N 81.20W
05/14/2012                   WILKES             NC   PUBLIC

            SIX TO EIGHT INCHES OF WATER FLOWING OVER A BRIDGE ON
            CONGO ROAD...AND ONE CAR WAS SWEPT OFF THE ROAD INTO A
            DITCH

0745 PM     FLOOD            1 WSW PEAKS OF OTTER RE 37.44N 79.63W
05/14/2012                   BEDFORD            VA   PUBLIC

            SHEEP CREEK SPILLING OUT OF ITS BANKS AND OVERFLOWING A
            LOW WATER BRIDGE ON JAY BIRD LANE

0756 PM     FLASH FLOOD      1 N HUNTSVILLE          36.10N 80.52W
05/14/2012                   YADKIN             NC   EMERGENCY MNGR

            WATER FLOWING OVER A BRIDGE ON DINKINS BOTTOMS ROAD...AND
            MULTIPLE TREES DOWN FROM THE FLOWING WATER

0900 PM     FLASH FLOOD      BURNT CHIMNEY           37.10N 79.83W
05/14/2012                   FRANKLIN           VA   EMERGENCY MNGR

            EXTENSIVE FLOODING REPORTED ACROSS NORTHERN AND EASTERN
            FRANKLIN COUNTY. BIGGEST PROBLEMS BETWEEN ROCKY MOUNT AND
            SMITH MOUNTAIN LAKE. NINE VEHICLES STRANDED IN FLOOD
            WATERS ALONG VA 122. TWO 60-INCH CULVERTS WASHED OUT AT
            THE WINDY RIDGE FARM SUBDIVISION WITH CURRENTLY NO ACCESS
            IN/OUT OF THE SUBDIVISION FOR THE 15 RESIDENTS LIVING
            THERE. OTHER ROADS WITH MINOR DAMAGE AND UNDERMINED BY
            THE FLOOD WATERS. REPORTS OF RAINFALL IN EXCESS OF 4 IN/2
            HRS ACROSS THIS PART OF THE COUNTY.

0913 PM     FLASH FLOOD      1 SSW WESTERN SMITH MOU 37.03N 79.75W
05/14/2012                   FRANKLIN           VA   LAW ENFORCEMENT

            SIX TO EIGHT INCHES OF WATER FLOWING OVER A BRIDGE ON
            POWELLS STORE ROAD

0955 PM     FLASH FLOOD      2 N MECHANICSBURG       37.18N 80.96W
05/14/2012                   BLAND              VA   EMERGENCY MNGR

            AT LEAST SIX INCHES OF WATER FLOWING OVER PRICE RIDGE
            ROAD

1047 PM     FLASH FLOOD      4 NW GLASGOW            37.67N 79.50W
05/14/2012                   ROCKBRIDGE         VA   EMERGENCY MNGR

            CAR STRANDED FROM WATER FLOODING OVER TINKERVILLE
            ROAD...WHICH REQUIRED A SWIFT WATER RESCUE

&&

RAB

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 8:02 PM EDTSpecial Weather StatementRNKBedford28 min
May 14, 8:41 PM EDTFlash Flood WarningRNKBedford, Franklin5 hr
May 14, 8:55 PM EDTAreal Flood WarningRNKAmherst, Bedford, Rockbridge, City of Buena Vista, City of Lexington6 hr
May 14, 9:10 PM EDTSpecial Weather StatementRNKBland35 min
May 14, 9:16 PM EDTFlash Flood WarningRNKBland, Giles4 hr
May 14, 9:23 PM EDTFlash Flood WarningRNKAmherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington6 hr
May 15, 1:27 AM EDTAreal Flood AdvisoryRNKBedford, Franklin6 hr
May 15, 1:39 AM EDTAreal Flood WarningRNKBedford, Franklin6 hr
May 15, 5:39 AM EDTFlash Flood WatchRNKAmherst, Bedford, Botetourt, Carroll, Floyd, Franklin and 8 more17 hr
May 15, 6:19 AM EDTDense Fog AdvisoryRNKBland, Carroll, Floyd, Giles, Grayson, Montgomery and 6 more4 hr
May 15, 1:11 PM EDTSpecial Weather StatementRNKCity of Galax64 min
May 15, 4:57 PM EDTFlash Flood WarningRNKGrayson5 hr
May 15, 5:43 PM EDTSpecial Weather StatementRNKGrayson62 min
May 15, 5:47 PM EDTSpecial Weather StatementRNKWythe58 min
May 15, 6:43 PM EDTSevere Thunderstorm WarningRNKPulaski, Wythe62 min
May 15, 6:56 PM EDTFlash Flood WarningRNKBedford, Franklin6 hr
May 15, 6:57 PM EDTSevere Thunderstorm WarningRNKBedford, Campbell, Franklin, Pittsylvania63 min
May 15, 7:49 PM EDTSpecial Weather StatementRNKPulaski56 min
May 14, 8:16 PM EDTSpecial Weather StatementRNKAshe29 min
May 15, 3:38 PM EDTSpecial Weather StatementRNKAlleghany52 min
May 15, 3:46 PM EDTSpecial Weather StatementRNKWatauga59 min
May 15, 5:27 PM EDTFlash Flood WarningRNKAshe, Watauga4 hr
May 15, 5:32 PM EDTSpecial Weather StatementRNKSurry58 min
May 15, 6:29 PM EDTSevere Thunderstorm WarningRNKStokes, Surry33 min

Nearby

Areal Flood Warnings in Virginia, 2012Every areal flood warning 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.