Alert archive / Virginia / Areal Flood Warnings in 2012

Areal Flood Warning 7, NWS Blacksburg, VA

May 15, 2012Bedford County, Franklin County, Virginia

NWS Blacksburg, VA issued this areal flood warning at May 15, 2012, 1:39 AM EDT for Bedford County, Franklin County, 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, 1:39 AM EDT (05:39 UTC)
Expired: May 15, 2012, 7:45 AM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Bedford County, VA, Franklin County, VA

The radar

The Roanoke radar (KFCX), 53 km from the middle of the area, began a volume at 05:42 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, 5.7 hours before the alert went out and 19 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: 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, 4 hours 6 minutes earlier.

Area forecast discussion, May 14, 9:33 PM EDT, 4 hours 6 minutes before

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Hazardous weather outlook, May 14, 9:43 PM EDT, 3 hours 56 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

Special weather statement, May 14, 9:10 PM EDT, 4 hours 29 minutes before

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Local storm report, May 14, 9:20 PM EDT, 4 hours 19 minutes before

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Local storm report, May 14, 10:01 PM EDT, 3 hours 38 minutes before

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Local storm report, May 14, 11:00 PM EDT, 2 hours 39 minutes before

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Local storm report, May 14, 11:36 PM EDT, 2 hours 3 minutes before

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Local storm report, May 15, 12:00 AM EDT, 1 hour 39 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

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 8:02 PM EDT	Special Weather Statement	RNK	Bedford	28 min
May 14, 8:41 PM EDT	Flash Flood Warning	RNK	Bedford, Franklin	5 hr
May 14, 8:55 PM EDT	Areal Flood Warning	RNK	Amherst, Bedford, Rockbridge, City of Buena Vista, City of Lexington	6 hr
May 14, 9:10 PM EDT	Special Weather Statement	RNK	Bland	35 min
May 14, 9:16 PM EDT	Flash Flood Warning	RNK	Bland, Giles	4 hr
May 14, 9:23 PM EDT	Flash Flood Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	6 hr
May 15, 1:27 AM EDT	Areal Flood Advisory	RNK	Bedford, Franklin	6 hr
May 15, 3:15 AM EDT	Areal Flood Warning	RNK	Botetourt, Rockbridge, City of Buena Vista, City of Lexington	6 hr
May 15, 5:39 AM EDT	Flash Flood Watch	RNK	Amherst, Bedford, Botetourt, Carroll, Floyd, Franklin and 8 more	17 hr
May 15, 6:19 AM EDT	Dense Fog Advisory	RNK	Bland, Carroll, Floyd, Giles, Grayson, Montgomery and 6 more	4 hr
May 15, 1:11 PM EDT	Special Weather Statement	RNK	City of Galax	64 min
May 15, 4:57 PM EDT	Flash Flood Warning	RNK	Grayson	5 hr
May 15, 5:43 PM EDT	Special Weather Statement	RNK	Grayson	62 min
May 15, 5:47 PM EDT	Special Weather Statement	RNK	Wythe	58 min
May 15, 6:43 PM EDT	Severe Thunderstorm Warning	RNK	Pulaski, Wythe	62 min
May 15, 6:56 PM EDT	Flash Flood Warning	RNK	Bedford, Franklin	6 hr
May 15, 6:57 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Pittsylvania	63 min
May 15, 7:49 PM EDT	Special Weather Statement	RNK	Pulaski	56 min
May 14, 8:16 PM EDT	Special Weather Statement	RNK	Ashe	29 min
May 15, 3:38 PM EDT	Special Weather Statement	RNK	Alleghany	52 min
May 15, 3:46 PM EDT	Special Weather Statement	RNK	Watauga	59 min
May 15, 5:27 PM EDT	Flash Flood Warning	RNK	Ashe, Watauga	4 hr
May 15, 5:32 PM EDT	Special Weather Statement	RNK	Surry	58 min
May 15, 6:29 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	33 min

Nearby

Areal Flood Warnings in Virginia, 2012 Every 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.