Alert archive / North Carolina / Areal Flood Warnings in 2011

Areal Flood Warning 3, NWS Blacksburg, VA

March 6, 20114 counties in North Carolina

NWS Blacksburg, VA issued this areal flood warning at Mar 6, 2011, 4:41 AM EST for 4 counties in North Carolina. It was in force for 12 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
Mar 6, 2011, 4:41 AM EST (09:41 UTC)
Expired
Mar 6, 2011, 4:30 PM EST
In force
12 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

Counties Alleghany County, NC, Ashe County, NC, Watauga County, NC, Wilkes County, NC

The radar

The Roanoke radar (KFCX), 124 km from the middle of the area, began a volume at 09:43 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, 9.7 hours before the alert went out and 135 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, Greensboro/Hi Pt, NC at 00:00Z on 2011-03-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 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, Greensboro/Hi Pt, NC at 00:00Z on 2011-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1135 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
302 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 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 Mar 6, 4:07 AM EST, 34 minutes earlier.

Area forecast discussion, Mar 6, 4:07 AM EST, 34 minutes before
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Hazardous weather outlook, Mar 6, 4:34 AM EST, 7 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
434 AM EST SUN MAR 6 2011

NCZ001>003-018-019-VAZ007-009>020-022>024-032-WVZ042>045-070945-
ASHE-ALLEGHANY NC-SURRY-WATAUGA-WILKES-TAZEWELL-SMYTH-BLAND-GILES-
WYTHE-PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA-
BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-MERCER-SUMMERS-MONROE-
GREENBRIER-
434 AM EST SUN MAR 6 2011

...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

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

.DAY ONE...TODAY AND TONIGHT.

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

   FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

ANOTHER STORM SYSTEM COULD BRING HEAVY RAINS TO THE AREA BY THURSDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

NCZ004>006-020-VAZ033>035-043>047-058-059-070945-
STOKES-ROCKINGHAM-CASWELL-YADKIN-FRANKLIN-BEDFORD-AMHERST-HENRY-
PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-
434 AM EST SUN MAR 6 2011

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

.DAY ONE...TODAY AND TONIGHT.

RAIN WILL BE HEAVY AT TIMES THIS MORNING INTO THE AFTERNOON.
LOCALIZED FLOODING IS POSSIBLE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

ANOTHER STORM SYSTEM COULD BRING HEAVY RAINS BY THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 4:12 AM ESTAreal Flood WarningRNKGiles12 hr
Mar 6, 5:40 AM ESTSpecial Weather StatementRNKCarroll, Floyd, Giles, Montgomery, Pulaski, City of Galax and 1 more65 min
Mar 6, 6:44 AM ESTAreal Flood WarningRNKSmyth, Tazewell6 hr
Mar 6, 7:43 AM ESTAreal Flood WarningRNKBland6 hr
Mar 6, 8:03 AM ESTAreal Flood WarningRNKCarroll, Floyd, Grayson, Patrick, City of Galax6 hr
Mar 6, 9:08 AM ESTAreal Flood WarningRNKCarroll, Grayson, Wythe6 hr
Mar 6, 9:13 AM ESTAreal Flood WarningRNKCarroll, Craig, Floyd, Franklin, Montgomery, Patrick and 3 more6 hr
Mar 6, 10:09 AM ESTAreal Flood WarningRNKAlleghany, Amherst, Bath, Bedford, Botetourt, Craig and 8 more6 hr
Mar 6, 10:16 AM ESTWinter Weather AdvisoryRNKBland, Grayson, Smyth, Tazewell8 hr
Mar 6, 12:32 PM ESTRiver Flood WarningRNKGiles18 hr
Mar 6, 12:32 PM ESTRiver Flood WarningRNKGiles18 hr
Mar 6, 1:50 PM ESTAreal Flood WarningRNKCarroll, Floyd, Grayson, Patrick, City of Galax6 hr
Mar 6, 2:46 PM ESTAreal Flood WarningRNKCarroll, Grayson, Wythe3 hr
Mar 6, 3:10 PM ESTAreal Flood WarningRNKCarroll, Craig, Floyd, Franklin, Montgomery, Patrick and 3 more7 hr
Mar 6, 3:28 PM ESTAreal Flood WarningRNKAmherst, Bedford, Franklin, City of Lynchburg5 hr
Mar 6, 3:45 PM ESTAreal Flood WarningRNKAlleghany, Amherst, Bath, Bedford, Botetourt, Craig and 8 more8 hr
Mar 6, 8:37 AM ESTAreal Flood WarningRNKAlleghany, Surry, Wilkes, Yadkin8 hr
Mar 6, 12:39 PM ESTRiver Flood WarningRNKSurry, Yadkin15 hr
Mar 6, 6:03 AM ESTAreal Flood WarningRNKGreenbrier6 hr
Mar 6, 7:51 AM ESTAreal Flood WarningRNKMonroe6 hr
Mar 6, 11:30 AM ESTAreal Flood WarningRNKGreenbrier9 hr

Nearby

Areal Flood Warnings in North Carolina, 2011Every areal flood warning in 2011

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.