Alert archive / Virginia / Areal Flood Advisories in 2012

Areal Flood Advisory 13, NWS Blacksburg, VA

April 26, 2012Tazewell County, Virginia

NWS Blacksburg, VA issued this areal flood advisory at Apr 26, 2012, 11:09 AM EDT for Tazewell County, Virginia. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 26, 2012, 11:09 AM EDT (15:09 UTC)
Expired
Apr 26, 2012, 2:00 PM EDT
In force
3 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon

County Tazewell County, VA

The radar

The Roanoke radar (KFCX), 115 km from the middle of the area, began a volume at 15:09 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, 3.2 hours before the alert went out and 183 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 2012-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -140 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-140 m²/s²
0-3 km storm-relative helicity
-105 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 areal flood advisory 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 advisory went out at Apr 26, 10:34 AM EDT, 35 minutes earlier.

Area forecast discussion, Apr 26, 10:34 AM EDT, 35 minutes before
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Hazardous weather outlook, Apr 26, 10:24 AM EDT, 45 minutes before
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In the hours before

Special weather statement, Apr 26, 8:31 AM EDT, 2 hours 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
831 AM EDT THU APR 26 2012

VAZ007-009-010-012-261330-
BLAND VA-SMYTH VA-TAZEWELL VA-WYTHE VA-
831 AM EDT THU APR 26 2012

...A LINE OF STRONG THUNDERSTORM WILL AFFECT
BLAND...SMYTH...TAZEWELL AND WYTHE COUNTIES...

AT 827 AM EDT...A STRONG THUNDERSTORM WAS LOCATED 9 MILES SOUTHEAST
OF RICHLANDS...MOVING EAST AT 35 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. EXPECT FREQUENT
CLOUD TO GROUND LIGHTNING FROM THIS STORM. DO NOT STAY IN THE OPEN OR
SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN
A THUNDERSTORM APPROACHES.

THIS STORM WILL BE NEAR ASBERRYS AROUND 840 AM...HUNGRY MOTHER STATE
PARK AROUND 845 AM...NEBO...AND ATKINS AROUND 855 AM...MARION
WYTHEVILLE...AND CERES AROUND 900 AM...RURAL RETREAT AROUND 910 AM...
FAVONIA AND AND CROCKETT AROUND 915 AM.

LAT...LON 3710 8185 3704 8108 3678 8114 3693 8179
      3700 8180 3704 8183
Special weather statement, Apr 26, 9:18 AM EDT, 1 hour 51 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
918 AM EDT THU APR 26 2012

NCZ002-003-019-020-VAZ015-016-261345-
ALLEGHANY NC-CARROLL VA-GRAYSON VA-SURRY NC-WILKES NC-YADKIN NC-
918 AM EDT THU APR 26 2012

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT
ALLEGHANY...CARROLL...GRAYSON...SURRY...WILKES AND YADKIN COUNTIES...

AT 918 AM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM MOUTH OF
WILSON TO 4 MILES SOUTHWEST OF LAUREL SPRINGS TO 8 MILES NORTHWEST OF
BOOMER...MOVING EAST AT 40 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. VERY HEAVY RAIN
WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO POND ON ROADS
AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THESE STORMS WILL BE NEAR INDEPENDENCE AROUND 925 AM...SPARTA AROUND
930 AM...BAYWOOD AROUND 935 AM...GALAX CITY AROUND 940 AM AND
CLINGMAN AROUND 945 AM.

LAT...LON 3602 8135 3609 8146 3635 8123 3668 8131
      3674 8070 3634 8070 3605 8082 3605 8099
      3603 8106 3603 8115 3602 8117 3603 8121
      3602 8127 3599 8133
Special weather statement, Apr 26, 9:31 AM EDT, 1 hour 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
931 AM EDT THU APR 26 2012

VAZ007-010>013-015-016-WVZ042-261400-
BLAND VA-CARROLL VA-GILES VA-GRAYSON VA-MERCER WV-PULASKI VA-
TAZEWELL VA-WYTHE VA-
931 AM EDT THU APR 26 2012

...A LINE OF GUSTY THUNDERSTORMS WILL AFFECT
BLAND...CARROLL...GILES...GRAYSON...MERCER...PULASKI...TAZEWELL AND
WYTHE COUNTIES...

AT 927 AM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM 7 MILES
NORTH OF TAZEWELL TO 7 MILES SOUTHWEST OF SPEEDWELL...MOVING EAST AT
45 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. VERY HEAVY RAIN
WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO POND ON ROADS
AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THESE STORMS WILL BE NEAR BOISSEVAIN AROUND 935 AM...PINNACLE ROCK
STATE PARK AROUND 940 AM...MERCER COUNTY AIRPORT AROUND 945 AM...
CERES AROUND 950 AM...PRINCETON AROUND 955 AM AND OAKVALE AROUND 1000
AM.

LAT...LON 3730 8141 3744 8090 3675 8070 3666 8127
      3676 8130 3676 8127 3678 8126 3690 8133
      3728 8142
Special weather statement, Apr 26, 9:49 AM EDT, 1 hour 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
949 AM EDT THU APR 26 2012

NCZ002>005-019-020-VAZ015-016-032-043-261430-
ALLEGHANY NC-CARROLL VA-GRAYSON VA-HENRY VA-PATRICK VA-ROCKINGHAM NC-
STOKES NC-SURRY NC-WILKES NC-YADKIN NC-
949 AM EDT THU APR 26 2012

...A LINE OF GUSTY THUNDERSTORMS WILL AFFECT
ALLEGHANY...CARROLL...GRAYSON...HENRY...PATRICK...ROCKINGHAM...STOKES
...SURRY...WILKES AND YADKIN COUNTIES...

AT 945 AM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM 6 MILES
EAST OF ENNICE TO 9 MILES SOUTH OF RONDA...MOVING EAST AT 45 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. VERY HEAVY RAIN
WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO POND ON ROADS
AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THESE STORMS WILL BE NEAR PINE RIDGE...FAIRVIEW...FAIRVIEW...AND
DOBSON AROUND 955 AM...CANA...TOAST...ROCKFORD...AND MOUNT AIRY
AROUND 1000 AM...SILOAM AND AND FLAT ROCK AROUND 1005 AM.

LAT...LON 3605 8097 3665 8098 3665 8000 3625 8000
      3626 8044 3614 8044 3611 8046 3610 8050
      3604 8050
Special weather statement, Apr 26, 10:42 AM EDT, 27 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 25, 11:39 PM EDTSpecial Weather StatementRNKBland36 min
Apr 25, 11:52 PM EDTSevere Thunderstorm WarningRNKSmyth, Tazewell23 min
Apr 26, 12:17 AM EDTSpecial Weather StatementRNKSmyth28 min
Apr 26, 12:39 AM EDTSpecial Weather StatementRNKGrayson, City of Galax36 min
Apr 26, 1:15 AM EDTSpecial Weather StatementRNKPatrick15 min
Apr 26, 2:38 AM EDTSpecial Weather StatementRNKCarroll37 min
Apr 26, 4:31 AM EDTSpecial Weather StatementRNKAlleghany, City of Covington29 min
Apr 26, 4:56 AM EDTSpecial Weather StatementRNKBland, Botetourt, Craig, Giles, Montgomery, Pulaski and 5 more34 min
Apr 26, 7:59 AM EDTAreal Flood AdvisoryRNKTazewell3 hr
Apr 26, 8:31 AM EDTSpecial Weather StatementRNKSmyth59 min
Apr 26, 8:45 AM EDTSevere Thunderstorm WarningRNKGrayson60 min
Apr 26, 8:57 AM EDTSevere Thunderstorm WarningRNKBland, Grayson, Smyth, Tazewell, Wythe63 min
Apr 26, 9:18 AM EDTSpecial Weather StatementRNKCarroll, Grayson, City of Galax27 min
Apr 26, 9:31 AM EDTSpecial Weather StatementRNKBland, Wythe29 min
Apr 26, 10:42 AM EDTSpecial Weather StatementRNKHenry, City of Danville63 min
Apr 26, 11:54 AM EDTAreal Flood AdvisoryRNKBland3 hr
Apr 26, 12:44 PM EDTAreal Flood AdvisoryRNKAlleghany, Bath, City of Covington6 hr
Apr 26, 2:03 PM EDTAreal Flood AdvisoryRNKTazewell6 hr
Apr 26, 2:53 PM EDTAreal Flood AdvisoryRNKBland3 hr
Apr 26, 6:16 PM EDTSevere Thunderstorm WarningRNKBland, Giles59 min
Apr 26, 7:00 PM EDTFlash Flood WarningRNKBland, Tazewell6 hr
Apr 26, 7:10 PM EDTSevere Thunderstorm WarningRNKBland, Giles, Tazewell, Wythe65 min
Apr 26, 7:53 PM EDTSevere Thunderstorm WarningRNKCraig, Giles, Montgomery52 min
Apr 26, 7:56 PM EDTSpecial Weather StatementRNKBath64 min
Apr 26, 2:20 AM EDTSpecial Weather StatementRNKRockingham25 min
Apr 26, 9:49 AM EDTSpecial Weather StatementRNKStokes, Surry, Yadkin41 min
Apr 26, 2:39 AM EDTSpecial Weather StatementRNKGreenbrier36 min
Apr 26, 3:55 AM EDTSpecial Weather StatementRNKGreenbrier, Summers35 min
Apr 26, 6:25 PM EDTSpecial Weather StatementRNKGreenbrier65 min
Apr 26, 6:34 PM EDTFlash Flood WarningRNKMercer, Summers6 hr
Apr 26, 6:51 PM EDTFlash Flood WarningRNKGreenbrier, Summers6 hr
Apr 26, 7:26 PM EDTSpecial Weather StatementRNKMonroe64 min

Nearby

Areal Flood Advisories in Virginia, 2012Every areal flood advisory 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.