Alert archive / Virginia / Flash Flood Warnings in 2025

Flash Flood Warning 11, NWS Blacksburg, VA

May 12, 2025Roanoke County, City of Roanoke, City of Salem, Virginia

NWS Blacksburg, VA issued this flash flood warning at May 12, 2025, 10:59 PM EDT for Roanoke County, City of Roanoke, City of Salem, Virginia. It was in force for 5 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 12, 2025, 10:59 PM EDT (02:59 UTC)
Expired: May 13, 2025, 4:00 AM EDT
In force: 5 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

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

The radar

The Roanoke radar (KFCX), 35 km from the middle of the area, began a volume at 02:59 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, 3.0 hours before the alert went out and 46 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: 26 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 615 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 May 12, 10:27 PM EDT, 32 minutes earlier.

Area forecast discussion, May 12, 10:27 PM EDT, 32 minutes before

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Hazardous weather outlook, May 12, 3:28 PM EDT, 7 hours 31 minutes before

Hazardous Weather Outlook
National Weather Service Blacksburg VA
328 PM EDT Mon May 12 2025

NCZ001>003-018>020-VAZ015-016-130930-
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Yadkin-Grayson-Carroll-
328 PM EDT Mon May 12 2025

...FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY EVENING...

This Hazardous Weather Outlook is for north central North Carolina,
northwest North Carolina and southwest Virginia.

.DAY ONE...This afternoon 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...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are requested to report flooding and any resulting
damage.

NCZ004>006-VAZ017-022>024-032>035-043>047-058-059-130930-
Stokes-Rockingham-Caswell-Floyd-Roanoke-Botetourt-Rockbridge-Patrick-
Franklin-Bedford-Amherst-Henry-Pittsylvania-Campbell-Appomattox-
Buckingham-Halifax-Charlotte-
328 PM EDT Mon May 12 2025

...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TUESDAY NIGHT...

This Hazardous Weather Outlook is for north central North Carolina,
central Virginia, south central Virginia, southwest Virginia and
west central Virginia.

.DAY ONE...This afternoon 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...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are requested to report flooding and any resulting
damage.

VAZ007-009>014-018>020-WVZ042>044-507-508-130930-
Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-Montgomery-Craig-
Alleghany VA-Bath-Mercer-Summers-Monroe-Eastern Greenbrier-
Western Greenbrier-
328 PM EDT Mon May 12 2025

This Hazardous Weather Outlook is for southwest Virginia, west
central Virginia and southeast West Virginia.

.DAY ONE...This afternoon and tonight.

Excessive rainfall may result in localized flash flooding. Periods
of prolonged heavy rain today may cause creeks and streams to rapidly
rise out of their banks and threaten nearby roads and bridges.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Excessive rainfall may result in localized flash flooding Tuesday.
Periods of prolonged heavy rain today may cause creeks and streams to
rapidly rise out of their banks and threaten nearby roads and
bridges.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, May 12, 9:27 PM EDT, 1 hour 32 minutes before

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Local storm report, May 12, 10:45 PM EDT, 14 minutes before

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Local storm report, May 12, 10:54 PM EDT, 5 minutes before

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Local storm report, May 12, 10:55 PM EDT, 4 minutes before

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Local storm report, May 12, 10:57 PM EDT, 2 minutes before

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Local storm report, May 12, 10:58 PM EDT, 1 minute 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
May 12, 8:32 PM EDT	Areal Flood Advisory	RNK	Floyd, Franklin, Henry, Montgomery, Patrick, Roanoke and 2 more	8 hr
May 12, 9:23 PM EDT	Flash Flood Warning	RNK	Floyd, Franklin, Henry, Patrick	4 hr
May 12, 9:50 PM EDT	Areal Flood Advisory	RNK	Montgomery, Pulaski, City of Radford	4 hr
May 12, 10:04 PM EDT	Areal Flood Advisory	RNK	Henry, City of Martinsville	4 hr
May 12, 10:12 PM EDT	Areal Flood Advisory	RNK	Grayson	7 hr
May 13, 2:18 AM EDT	Areal Flood Advisory	RNK	Alleghany, Bedford, Botetourt, Craig, Franklin, Roanoke and 1 more	3 hr
May 13, 5:48 AM EDT	Areal Flood Advisory	RNK	Amherst, Appomattox, Bedford, Campbell, City of Lynchburg	3 hr
May 13, 11:09 AM EDT	Areal Flood Advisory	RNK	Bland, Giles, Pulaski, Wythe	3 hr
May 13, 12:09 PM EDT	Areal Flood Advisory	RNK	Giles, Montgomery, Pulaski, City of Radford	3 hr
May 13, 12:33 PM EDT	Flash Flood Warning	RNK	Craig, Giles, Montgomery	2 hr
May 13, 1:34 PM EDT	Special Weather Statement	RNK	Carroll, Grayson, Wythe, City of Galax	86 min
May 13, 2:04 PM EDT	Areal Flood Advisory	RNK	Alleghany, Amherst, Appomattox, Bath, Bedford, Botetourt and 7 more	6 hr
May 13, 2:29 PM EDT	Special Weather Statement	RNK	Bland	46 min
May 13, 3:38 PM EDT	Special Weather Statement	RNK	Giles	22 min
May 13, 3:58 PM EDT	Special Weather Statement	RNK	Giles	47 min
May 13, 3:59 PM EDT	Special Weather Statement	RNK	Roanoke, City of Roanoke, City of Salem	31 min
May 13, 4:13 PM EDT	Special Weather Statement	RNK	Montgomery, Roanoke	47 min
May 13, 4:29 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	46 min
May 13, 4:33 PM EDT	Areal Flood Advisory	RNK	Roanoke, City of Roanoke, City of Salem	3 hr
May 13, 4:38 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania	52 min
May 13, 4:59 PM EDT	Special Weather Statement	RNK	Roanoke, City of Salem	46 min
May 13, 5:08 PM EDT	Severe Thunderstorm Warning	RNK	Craig, Montgomery, Roanoke, City of Roanoke, City of Salem	37 min
May 13, 5:27 PM EDT	Special Weather Statement	RNK	Pittsylvania	48 min
May 13, 5:33 PM EDT	Areal Flood Warning	RNK	Craig	7 hr
May 13, 5:36 PM EDT	Special Weather Statement	RNK	City of Danville	54 min
May 13, 5:51 PM EDT	Special Weather Statement	RNK	City of Roanoke	54 min
May 13, 6:00 PM EDT	Special Weather Statement	RNK	Bath	45 min
May 13, 6:21 PM EDT	Flash Flood Warning	RNK	Bedford, Franklin	116 min
May 13, 6:44 PM EDT	Special Weather Statement	RNK	Bedford	31 min
May 13, 7:06 PM EDT	Special Weather Statement	RNK	City of Lynchburg	24 min
May 13, 7:30 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Campbell, City of Lynchburg	30 min
May 13, 7:36 PM EDT	Special Weather Statement	RNK	Tazewell	24 min
May 13, 7:49 PM EDT	Special Weather Statement	RNK	Charlotte	26 min
May 12, 11:44 PM EDT	Areal Flood Advisory	RNK	Watauga, Wilkes	5 hr
May 13, 12:57 AM EDT	Areal Flood Warning	RNK	Ashe, Watauga	6 hr
May 13, 7:19 AM EDT	Areal Flood Warning	RNK	Alleghany, Ashe, Watauga	7 hr
May 13, 1:37 PM EDT	Special Weather Statement	RNK	Greenbrier	53 min
May 13, 1:40 PM EDT	Areal Flood Advisory	RNK	Greenbrier, Summers	3 hr
May 13, 4:44 PM EDT	Special Weather Statement	RNK	Monroe	46 min

Nearby

Flash Flood Warnings in Virginia, 2025 Every flash flood warning in 2025

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.