Alert archive / Virginia / Areal Flood Warnings in 2016

Areal Flood Warning 2, NWS Blacksburg, VA

February 3, 20164 counties in Virginia

NWS Blacksburg, VA issued this areal flood warning at Feb 3, 2016, 4:22 PM EST for 4 counties in Virginia. 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
Feb 3, 2016, 4:22 PM EST (21:22 UTC)
Expired
Feb 4, 2016, 4:15 AM EST
In force
12 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

Counties City of Roanoke, VA, City of Salem, VA, Montgomery County, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 28 km from the middle of the area, began a volume at 21:22 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 12:00Z, 9.4 hours before the alert went out and 130 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 12:00Z on 2016-02-03Temperature 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, Greensboro/Hi Pt, NC at 12:00Z on 2016-02-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 411 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
500 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
411 m²/s²
0-3 km storm-relative helicity
494 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 Feb 3, 3:34 PM EST, 48 minutes earlier.

Area forecast discussion, Feb 3, 3:34 PM EST, 48 minutes before
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Hazardous weather outlook, Feb 3, 2:52 PM EST, 1 hour 30 minutes before
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In the hours before

Local storm report, Feb 3, 2:35 PM EST, 1 hour 47 minutes before
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Special weather statement, Feb 3, 2:43 PM EST, 1 hour 39 minutes before
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Local storm report, Feb 3, 2:47 PM EST, 1 hour 35 minutes before
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Local storm report, Feb 3, 3:20 PM EST, 1 hour 2 minutes before
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Local storm report, Feb 3, 3:32 PM EST, 50 minutes before
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Local storm report, Feb 3, 4:08 PM EST, 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
408 PM EST WED FEB 03 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0405 PM     FLOOD            1 NNE ROANOKE           37.29N 79.95W
02/03/2016                   CITY OF ROANOKE    VA   PUBLIC

            HEAVY RAIN CAUSED THE LICK RUN CREEK TO FLOOD THE
            GREENWAY AT BROWN-ROBERTSON PARK

&&

CRAFT

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 3, 4:00 AM ESTFlash Flood WatchRNKAmherst, Bedford, Botetourt, Carroll, Floyd, Franklin and 9 more11 hr
Feb 3, 8:51 AM ESTAreal Flood AdvisoryRNKBland, Smyth, Tazewell, Wythe6 hr
Feb 3, 9:51 AM ESTAreal Flood AdvisoryRNKCarroll, Floyd, Grayson, Patrick, City of Galax6 hr
Feb 3, 10:36 AM ESTAreal Flood AdvisoryRNKBedford, Botetourt, Floyd, Franklin, Montgomery, Pulaski and 5 more6 hr
Feb 3, 10:45 AM ESTAreal Flood AdvisoryRNKPatrick5 hr
Feb 3, 11:00 AM ESTSpecial Weather StatementRNKHenry, City of Martinsville45 min
Feb 3, 11:32 AM ESTFlash Flood WarningRNKPatrick6 hr
Feb 3, 12:03 PM ESTAreal Flood AdvisoryRNKHenry, City of Martinsville4 hr
Feb 3, 12:46 PM ESTSpecial Weather StatementRNKCity of Danville29 min
Feb 3, 1:15 PM ESTSpecial Weather StatementRNKHalifax, City of Danville30 min
Feb 3, 1:44 PM ESTSpecial Weather StatementRNKHalifax31 min
Feb 3, 2:34 PM ESTRiver Flood WarningRNKCharlotte, Halifax4 days
Feb 3, 2:34 PM ESTRiver Flood WarningRNKHalifax4 days
Feb 3, 2:43 PM ESTSpecial Weather StatementRNKAppomattox, Campbell, Charlotte, Halifax62 min
Feb 3, 8:42 AM ESTFlash Flood WarningRNKAlleghany, Ashe, Watauga7 hr
Feb 3, 12:21 PM ESTSpecial Weather StatementRNKRockingham24 min
Feb 3, 1:51 PM ESTSpecial Weather StatementRNKCaswell39 min
Feb 3, 2:31 PM ESTSpecial Weather StatementRNKCaswell59 min
Feb 3, 3:47 PM ESTAreal Flood WarningRNKAlleghany, Ashe, Watauga6 hr
Feb 3, 5:19 PM ESTAreal Flood WarningRNKSurry, Yadkin3 hr

Nearby

Areal Flood Warnings in Virginia, 2016Every areal flood warning in 2016

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.