Alert archive / North Carolina / Flash Flood Warnings in 2010

Flash Flood Warning 48, NWS Blacksburg, VA

June 4, 2010Alleghany County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Jun 4, 2010, 10:33 PM EDT for Alleghany County, North Carolina. It was in force for 3 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 4, 2010, 10:33 PM EDT (02:33 UTC)
Expired: Jun 5, 2010, 1:57 AM EDT
In force: 3 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

County Alleghany County, NC

The radar

The Roanoke radar (KFCX), 96 km from the middle of the area, began a volume at 02:34 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.6 hours before the alert went out and 402 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: 2291 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 9.8

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 4, 7:56 PM EDT, 2 hours 37 minutes earlier.

Area forecast discussion, Jun 4, 7:56 PM EDT, 2 hours 37 minutes before

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Hazardous weather outlook, Jun 4, 5:14 AM EDT, 17 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
514 AM EDT FRI JUN 4 2010

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-050915-
ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES-
YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON-
CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-
PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-
APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE-
GREENBRIER-
514 AM EDT FRI JUN 4 2010

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

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW
SATURDAY...MONDAY...AND TUESDAY.  THERE IS A SLIGHT RISK
OF SEVERE STORMS SATURDAY NIGHT INTO SUNDAY...AND THE
POTENTIAL FOR STRONG STORMS AGAIN BY THE MIDDLE OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED TODAY...BUT MAY BE NEEDED
LATE SATURDAY OR SUNDAY.

In the hours before

Special weather statement, Jun 4, 4:45 PM EDT, 5 hours 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
445 PM EDT FRI JUN 4 2010

VAZ011-WVZ044-042145-
GILES VA-MONROE WV-
445 PM EDT FRI JUN 4 2010

...A STRONG THUNDERSTORM WILL AFFECT GILES AND MONROE COUNTIES...

AT 438 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES NORTHEAST
OF PEARISBURG...MOVING NORTHEAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS
STORM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE
WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL
STREAMS.

THIS STORM WILL BE NEAR LINDSIDE...AND INTERIOR AROUND 450 PM...KIRE
AROUND 455 PM...RAINES CORNER AROUND 500 PM...ZENITH AROUND 505 PM...
LAUREL BRANCH...AND WAITEVILLE AROUND 515 PM AND UNION AROUND 520 PM.

LAT...LON 3770 8054 3757 8031 3754 8033 3753 8031
      3754 8028 3732 8064 3740 8078 3771 8060

PC

Special weather statement, Jun 4, 6:02 PM EDT, 4 hours 31 minutes before

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Special weather statement, Jun 4, 6:05 PM EDT, 4 hours 28 minutes before

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Local storm report, Jun 4, 6:23 PM EDT, 4 hours 10 minutes before

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Local storm report, Jun 4, 7:08 PM EDT, 3 hours 25 minutes before

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Special weather statement, Jun 4, 7:10 PM EDT, 3 hours 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 10:24 PM EDT	Special Weather Statement	RNK	Campbell	66 min
Jun 4, 10:47 PM EDT	Special Weather Statement	RNK	Henry, Patrick	58 min
Jun 4, 10:57 PM EDT	Special Weather Statement	RNK	Appomattox, Campbell	63 min
Jun 4, 11:17 PM EDT	Special Weather Statement	RNK	Henry, City of Danville, City of Martinsville	58 min
Jun 4, 11:46 PM EDT	Special Weather Statement	RNK	Charlotte	59 min
Jun 5, 12:39 AM EDT	Severe Thunderstorm Warning	RNK	Charlotte	26 min

Nearby

Flash Flood Warnings in North Carolina, 2010 Every flash flood warning in 2010

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.