Alert archive / Virginia / Flash Flood Warnings in 2009

Flash Flood Warning 58, NWS Blacksburg, VA

June 16, 20094 counties in Virginia; Surry County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Jun 16, 2009, 4:31 AM EDT for 4 counties in Virginia; Surry County, North Carolina. 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: Jun 16, 2009, 4:31 AM EDT (08:31 UTC)
Expired: Jun 16, 2009, 10:30 AM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Surry County, NC, Carroll County, VA, Floyd County, VA, Franklin County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 32 km from the middle of the area, began a volume at 08:31 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 8.5 hours before the alert went out and 86 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: 976 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 741 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash 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 flash flood warning went out at Jun 16, 1:57 AM EDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jun 16, 1:57 AM EDT, 2 hours 34 minutes before

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Hazardous weather outlook, Jun 15, 11:58 PM EDT, 4 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
1158 PM EDT MON JUN 15 2009

VAZ018>020-022>024-033>035-044>047-058-059-WVZ045-161100-
CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-FRANKLIN-
BEDFORD-AMHERST-PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-
CHARLOTTE-GREENBRIER-
1158 PM EDT MON JUN 15 2009

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

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED.

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

TUESDAY AND WEDNESDAY WILL BE WET...AS THE POTENTIAL EXISTS FOR
SEVERAL COMPLEXES OF SHOWERS AND THUNDERSTORMS TO PUSH THROUGH.
THE MAIN CONCERN WITH THESE IS GOING TO BE HEAVY RAINS...AND THE
POTENTIAL FOR FLOODING. THE CHANCE OF SEVERE THUNDERSTORMS WITH
DAMAGING WINDS CANNOT BE RULED OUT EITHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ001>006-018>020-VAZ007-009>017-032-043-WVZ042>044-161100-
ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES-
YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON-
CARROLL-FLOYD-PATRICK-HENRY-MERCER-SUMMERS-MONROE-
1158 PM EDT MON JUN 15 2009

...FLASH FLOOD WATCH IN EFFECT UNTIL 9 AM EDT TUESDAY...

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

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

   FLASH FLOOD WATCH.

TUESDAY AND WEDNESDAY WILL BE WET...AS THE POTENTIAL EXISTS FOR
SEVERAL COMPLEXES OF SHOWERS AND THUNDERSTORMS TO PUSH THROUGH.
THE MAIN CONCERN WITH THESE IS GOING TO BE HEAVY RAINS...AND THE
POTENTIAL FOR FLOODING. THE CHANCE OF SEVERE THUNDERSTORMS WITH
DAMAGING WINDS CANNOT BE RULED OUT EITHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jun 15, 11:01 PM EDT, 5 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1101 PM EDT MON JUN 15 2009

VAZ007-160400-
TAZEWELL VA-
1101 PM EDT MON JUN 15 2009

...THUNDERSTORM WITH HEAVY RAINFALL WILL AFFECT TAZEWELL COUNTY...

AT 1058 PM EDT...A CLUSTER OF THUNDERSTORMS WAS LOCATED NEAR
TAZEWELL...DRIFTING NORTHEAST AT 5 MPH.

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 IN THE TAZEWELL AREA THROUGH 1130 PM...AND ALSO
NEAR GRATTON AND TIPTOP FROM 1130 PM TO AROUND MIDNIGHT.

THE PUBLIC IS ENCOURAGED TO RELAY REPORTS OF STRONG WINDS...HAIL OR
FLOODING TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG BY CALLING
1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3721 8162 3721 8154 3726 8149 3728 8145
      3728 8142 3731 8139 3725 8124 3704 8146
      3713 8165

EXPERIMENTAL

JJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 11:01 PM EDT	Special Weather Statement	RNK	Tazewell	59 min
Jun 15, 11:44 PM EDT	Flash Flood Watch	RNK	Bland, Carroll, Floyd, Giles, Grayson, Henry and 9 more	9 hr
Jun 16, 12:42 AM EDT	Flash Flood Warning	RNK	Tazewell	5 hr
Jun 16, 6:27 AM EDT	Flash Flood Warning	RNK	Henry, City of Martinsville	6 hr
Jun 16, 9:59 AM EDT	Areal Flood Warning	RNK	Wythe	6 hr
Jun 16, 2:58 PM EDT	Flash Flood Watch	RNK	Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 23 more	29 hr
Jun 16, 7:54 PM EDT	Severe Thunderstorm Warning	RNK	Grayson, Smyth	81 min
Jun 16, 7:44 PM EDT	Flash Flood Warning	RNK	Ashe, Wilkes	6 hr

Nearby

Flash Flood Warnings in Virginia, 2009 Flash Flood Warnings in North Carolina, 2009 Every flash flood warning in 2009

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.