Alert archive / Virginia / Flash Flood Warnings in 2016

Flash Flood Warning 31, NWS Blacksburg, VA

August 2, 2016Craig County, Roanoke County, City of Salem, Virginia

NWS Blacksburg, VA issued this flash flood warning at Aug 2, 2016, 8:23 PM EDT for Craig County, Roanoke County, City of Salem, Virginia. It was in force for 6 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 2, 2016, 8:23 PM EDT (00:23 UTC)
Expired: Aug 3, 2016, 2:15 AM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

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

The radar

The Roanoke radar (KFCX), 44 km from the middle of the area, began a volume at 00:22 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.

What was reported inside it

Time	Report	Where	Remark
Aug 2, 9:30 PM EDT	FLASH FLOOD	3 N Bent Mountain, VA	FLASH FLOODING OBSERVED ALONG MARTINS CREEK. DAMAGE TO SEVERAL DRIVEWAYS.
Aug 2, 9:30 PM EDT	FLASH FLOOD	4 Ne Bent Mountain, VA	FLASH FLOODING OBSERVED ALONG BACK CREEK. WATER CAME 3-4 FEET OUT OF ITS BANKS NEAR THE COUNTRY WAY GENERAL STORE. ALMOST REACHED THE DECK BEHIND THE STORE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 0.4 hours before the alert went out and 64 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: 434 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.9

Open this sounding in Storm Lab

The text

As transmitted.

067 
WGUS51 KRNK 030023
FFWRNK
VAC045-161-775-030615-
/O.NEW.KRNK.FF.W.0031.160803T0023Z-160803T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
823 PM EDT TUE AUG 2 2016

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAIG COUNTY IN SOUTHWESTERN VIRGINIA...
  THE CITY OF SALEM IN WEST CENTRAL VIRGINIA...
  ROANOKE COUNTY IN WEST CENTRAL VIRGINIA...

* UNTIL 215 AM EDT
    
* AT 822 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAS
  ALREADY FALLEN IN CRAIG COUNTY AND UP TO TWO INCHES HAS FALLEN IN
  WESTERN ROANOKE COUNTY . FLASH FLOODING IS EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SALEM...
  NEW CASTLE...
  CATAWBA...
  PAINT BANK...
  AND BENT MOUNTAIN.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3762 8017 3760 8015 3762 8011 3750 8006
      3744 8005 3742 8007 3740 8004 3726 8002
      3725 8004 3725 8002 3717 8001 3713 8016
      3723 8019 3736 8026 3737 8033 3732 8044
      3742 8048 3752 8028 3756 8031 3762 8022

$$

SK

4 follow-up statements

629 
WGUS71 KRNK 030103
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
903 PM EDT TUE AUG 2 2016

VAC045-161-775-030615-
/O.CON.KRNK.FF.W.0031.000000T0000Z-160803T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAIG VA-CITY OF SALEM VA-ROANOKE VA-
903 PM EDT TUE AUG 2 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM EDT FOR 
CRAIG AND ROANOKE COUNTIES AND THE CITY OF SALEM...

AT 902 PM EDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN OVER THE WARNED AREA. UP TO THREE
INCHES OF RAIN HAVE ALREADY FALLEN IN PARTS OF THE WARNED AREA.
FLASH FLOODING IS EXPECTED. THE HEAVIEST RAIN HAS MOVED TO FAR
SOUTHERN ROANOKE COUNTY BETWEEN BENT MOUNTAIN AND CAVE SPRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SALEM...
NEW CASTLE...
CATAWBA...
PAINT BANK...
AND BENT MOUNTAIN.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3762 8017 3760 8015 3762 8011 3750 8006
      3744 8005 3742 8007 3740 8004 3726 8002
      3725 8004 3725 8002 3717 8001 3713 8016
      3723 8019 3736 8026 3737 8033 3732 8044
      3742 8048 3752 8028 3756 8031 3762 8022

$$

SK

354 
WGUS71 KRNK 030159
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
959 PM EDT TUE AUG 2 2016

VAC045-161-775-030615-
/O.CON.KRNK.FF.W.0031.000000T0000Z-160803T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAIG VA-CITY OF SALEM VA-ROANOKE VA-
959 PM EDT TUE AUG 2 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM EDT FOR 
CRAIG AND ROANOKE COUNTIES AND THE CITY OF SALEM...

AT 954 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. THREE TO FOUR INCHES OF RAIN HAS
ALREADY FALLEN...HOWEVER IT IS NOW BEGINNING TO TAPER OFF EVEN
ACROSS ROANOKE COUNTY. COUNTY OFFICIALS REPORTED A MUDSLIDE ON BENT
MOUNTAIN ROAD NEAR POAGES MILL AROUND 930 PM EDT. RUNOFF MAY
CONTINUE TO RESULT IN FLASH FLOODING IN PARTS OF THE AREA.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SALEM...
NEW CASTLE...
CATAWBA...
PAINT BANK...
AND BENT MOUNTAIN.

THIS INCLUDES THE FOLLOWING LOCATION THE SALEM FAIRGROUNDS.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3762 8017 3760 8015 3762 8011 3750 8006
      3744 8005 3742 8007 3740 8004 3726 8002
      3725 8004 3725 8002 3717 8001 3713 8016
      3723 8019 3736 8026 3737 8033 3732 8044
      3742 8048 3752 8028 3756 8031 3762 8022

$$

SK

387 
WGUS71 KRNK 030306
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1106 PM EDT TUE AUG 2 2016

VAC045-161-775-030615-
/O.CON.KRNK.FF.W.0031.000000T0000Z-160803T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAIG VA-CITY OF SALEM VA-ROANOKE VA-
1106 PM EDT TUE AUG 2 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM EDT FOR 
CRAIG AND ROANOKE COUNTIES AND THE CITY OF SALEM...

AT 1103 PM EDT...DOPPLER RADAR THAT ADDITIONAL HEAVIER SHOWERS WERE
MOVING BACK INTO THE REGION FROM FRANKLIN COUNTY. AN ADDITIONAL INCH
OR MORE OF RAIN COULD OCCUR ESPECIALLY ACROSS PARTS OF ROANOKE
COUNTY IN THE NEXT HOUR OR TWO. ADDED SHOWERS SHOULD BE LIGHTER
ACROSS CRAIG COUNTY WHERE RUNOFF FROM EARLIER HEAVY RAIN WILL LIKELY
CONTRIBUTE TO FLOODING OF CREEKS AND STREAMS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SALEM...
NEW CASTLE...
CATAWBA...
PAINT BANK...
AND BENT MOUNTAIN.

 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3762 8017 3760 8015 3762 8011 3750 8006
      3744 8005 3742 8007 3740 8004 3726 8002
      3725 8004 3725 8002 3717 8001 3713 8016
      3723 8019 3736 8026 3737 8033 3732 8044
      3742 8048 3752 8028 3756 8031 3762 8022

$$

JH

577 
WGUS71 KRNK 030525
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
125 AM EDT WED AUG 3 2016

VAC045-161-775-030535-
/O.CAN.KRNK.FF.W.0031.000000T0000Z-160803T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAIG VA-CITY OF SALEM VA-ROANOKE VA-
125 AM EDT WED AUG 3 2016

...THE FLASH FLOOD WARNING FOR CRAIG AND ROANOKE COUNTIES AND THE
CITY OF SALEM IS CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

LAT...LON 3762 8017 3760 8015 3762 8011 3750 8006
      3744 8005 3742 8007 3740 8004 3726 8002
      3725 8004 3725 8002 3717 8001 3713 8016
      3723 8019 3736 8026 3737 8033 3732 8044
      3742 8048 3752 8028 3756 8031 3762 8022

$$

PC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 9:12 PM EDT	Areal Flood Advisory	RNK	Pittsylvania	6 hr
Aug 2, 9:15 PM EDT	Areal Flood Advisory	RNK	Franklin	6 hr
Aug 2, 9:49 PM EDT	Areal Flood Advisory	RNK	Halifax	3 hr
Aug 2, 11:02 PM EDT	Special Weather Statement	RNK	Floyd	58 min
Aug 3, 6:55 AM EDT	Areal Flood Advisory	RNK	Roanoke, City of Roanoke, City of Salem	3 hr
Aug 3, 8:59 AM EDT	Areal Flood Advisory	RNK	Carroll, Grayson	3 hr
Aug 3, 11:25 AM EDT	Areal Flood Advisory	RNK	Patrick	4 hr
Aug 3, 1:19 PM EDT	Areal Flood Advisory	RNK	Carroll, Grayson, City of Galax	6 hr
Aug 3, 2:23 PM EDT	Flash Flood Watch	RNK	Bland, Carroll, Floyd, Giles, Grayson, Montgomery and 7 more	36 hr
Aug 3, 3:01 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Patrick	4 hr
Aug 3, 3:41 PM EDT	Areal Flood Advisory	RNK	Carroll, Patrick	4 hr
Aug 3, 7:02 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Patrick	3 hr

Nearby

Flash Flood Warnings in Virginia, 2016 Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.