Alert archive / Virginia / Flash Flood Warnings in 2016

Flash Flood Warning 34, NWS Blacksburg, VA

September 29, 20165 counties in Virginia

NWS Blacksburg, VA issued this flash flood warning at Sep 29, 2016, 2:38 PM EDT for 5 counties in Virginia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 29, 2016, 2:38 PM EDT (18:38 UTC)
Expired: Sep 29, 2016, 8:45 PM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Carroll County, VA, City of Radford, VA, Floyd County, VA, Montgomery County, VA, Pulaski County, VA

The radar

The Roanoke radar (KFCX), 42 km from the middle of the area, began a volume at 18:41 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, 6.6 hours before the alert went out and 99 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: 174 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

775 
WGUS51 KRNK 291838
FFWRNK
VAC035-063-121-155-750-300045-
/O.NEW.KRNK.FF.W.0034.160929T1838Z-160930T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
238 PM EDT THU SEP 29 2016

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN PULASKI COUNTY IN SOUTHWESTERN VIRGINIA...
  SOUTHWESTERN FLOYD COUNTY IN SOUTHWESTERN VIRGINIA...
  THE CITY OF RADFORD IN SOUTHWESTERN VIRGINIA...
  SOUTHWESTERN MONTGOMERY COUNTY IN SOUTHWESTERN VIRGINIA...
  EASTERN CARROLL COUNTY IN SOUTHWESTERN VIRGINIA...

* UNTIL 845 PM EDT THURSDAY

* AT 237 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  RADFORD...
  HILLSVILLE...
  DUBLIN...
  CANA...
  AND FANCY GAP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR FLOODED ROADS...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 3656 8079 3700 8072 3722 8067 3728 8048
      3704 8045 3665 8053 3664 8054 3666 8058
      3666 8059 3661 8062 3660 8062 3658 8061
      3656 8061

$$

PM

3 follow-up statements

607 
WGUS71 KRNK 292020
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
420 PM EDT THU SEP 29 2016

VAC035-063-121-155-750-300045-
/O.CON.KRNK.FF.W.0034.000000T0000Z-160930T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PULASKI VA-FLOYD VA-CITY OF RADFORD VA-MONTGOMERY VA-CARROLL VA-
420 PM EDT THU SEP 29 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR 
EASTERN PULASKI...SOUTHWESTERN FLOYD...SOUTHWESTERN MONTGOMERY AND
EASTERN CARROLL COUNTIES AND THE CITY OF RADFORD...

AT 400 PM EDT...DOPPLER RADAR INDICATED THE HEAVIEST OF THE RAIN HAD
MOVED NORTHEAST INTO EASTERN MONTGOMERY AND CRAIG COUNTIES. HOWEVER,
ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE
VIRGINIA...NORTH CAROLINA BORDER...NEAR CANA AND FANCY GAP. THESE
STORMS ARE THEN EXPECTED TO MOVE NORTH AND INTO PARTS OF THE NEW
RIVER VALLEY...FALLING OVER THE SAME AREA WHICH HAS RECEIVED HEAVY
RAIN.  THROUGH 4:00 PM, BETWEEN 1 INCH...AND 2.50 INCHES OF RAIN...
HAS FALLEN BETWEEN RADFORD AND HILLSVILLE.  AN ADDITIONAL 1 TO 2
INCHES OF RAIN IS POSSIBLE WITHIN THIS SAME CORRIDOR BETWEEN NOW AND
8:00 PM.  THIS ADDITIONAL RAINFALL WILL LIKELY CAUSE FLOODING.


SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
RADFORD...
HILLSVILLE...
DUBLIN...
CANA...
AND FANCY GAP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR FLOODED ROADS...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 3656 8079 3700 8072 3722 8067 3728 8048
      3704 8045 3665 8053 3664 8054 3666 8058
      3666 8059 3661 8062 3660 8062 3658 8061
      3656 8061

$$

PM

679 
WGUS71 KRNK 292153
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
553 PM EDT THU SEP 29 2016

VAC035-063-121-155-750-300045-
/O.CON.KRNK.FF.W.0034.000000T0000Z-160930T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PULASKI VA-FLOYD VA-CITY OF RADFORD VA-MONTGOMERY VA-CARROLL VA-
553 PM EDT THU SEP 29 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR 
EASTERN PULASKI...SOUTHWESTERN FLOYD...SOUTHWESTERN MONTGOMERY AND
EASTERN CARROLL COUNTIES AND THE CITY OF RADFORD...

BETWEEN 1 INCH...AND 2.5 INCHES OF RAIN HAS FALLEN BETWEEN RADFORD
VIRGINIA AND HILLSVILLE.  THIS RAINFALL RESULTED IN SIGNIFICANT
RISES ALONG AREA STREAMS.   THUNDERSTORMS ARE EXPECTED TO MOVE BACK
INTO CARROLL COUNTY BETWEEN 7:00 AND 8:00 PM. THESE STORMS WILL
LIKELY PRODUCE AN ADDITIONAL 1 INCH TO 2 INCHES OF RAIN. AS SUCH...A
FLASH FLOOD WARNING WILL REMAIN IN EFFECT...DUE TO A HIGH LIKELIHOOD
THESE STREAMS AND CREEKS WILL COME OUT OF THERE BANKS ONCE THIS
ADDITIONAL HEAVY RAINFALL COMMENCES AFTER 7:00 PM.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
RADFORD...
HILLSVILLE...
DUBLIN...
CANA...
AND FANCY GAP.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 ARE POSSIBLE IN THE WARNED
AREA.  BE PREPARED TO MOVE TO HIGHER GROUND IF YOU LIVE ALONG A
SMALL CREEK OR STREAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE MANY LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

IF YOU OBSERVE FLOODING...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR FLOODED ROADS...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 3656 8079 3700 8072 3722 8067 3728 8048
      3704 8045 3665 8053 3664 8054 3666 8058
      3666 8059 3661 8062 3660 8062 3658 8061
      3656 8061

$$

PM

428 
WGUS71 KRNK 292358
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
758 PM EDT THU SEP 29 2016

VAC035-063-121-155-750-300045-
/O.CON.KRNK.FF.W.0034.000000T0000Z-160930T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PULASKI VA-FLOYD VA-CITY OF RADFORD VA-MONTGOMERY VA-CARROLL VA-
758 PM EDT THU SEP 29 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR 
EASTERN PULASKI...SOUTHWESTERN FLOYD...SOUTHWESTERN MONTGOMERY AND
EASTERN CARROLL COUNTIES AND THE CITY OF RADFORD...

AT 746 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS WITH HEAVY
RAIN MOVING NORTH ALONG INTERSTATE 77...AND INTO CARROLL COUNTY.
THESE STORMS WILL MOVE OVER SOME OF THE SAME AREA WHICH RECEIVED
HEAVY RAIN DURING THE LATE AFTERNOON.  THE AREA WHICH WILL BE MOST
SUSCEPTIBLE TO FLASH FLOODING IS BETWEEN RADFORD AND HILLSVILLE WHERE
1 TO 3 INCHES OF RAIN FELL DURING THE AFTERNOON. FOR YOUR SAFETY
PLEASE AVOID CREEKS AND STREAMS IN THIS AREA.

SOME LOCATIONS THAT MAY EXPERIENCE FLASH FLOODING INCLUDE...
RADFORD...
HILLSVILLE...
CANA...
AND FANCY GAP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3656 8079 3700 8072 3722 8067 3728 8048
      3704 8045 3665 8053 3664 8054 3666 8058
      3666 8059 3661 8062 3660 8062 3658 8061
      3656 8061

$$

PM

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 8:07 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Roanoke	53 min
Sep 28, 8:10 PM EDT	Special Weather Statement	RNK	Buckingham	35 min
Sep 28, 8:41 PM EDT	Special Weather Statement	RNK	Amherst, Bedford, Botetourt, Floyd, Franklin, Henry and 8 more	34 min
Sep 28, 8:53 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Campbell, Charlotte, Halifax, Pittsylvania	25 min
Sep 28, 8:56 PM EDT	Special Weather Statement	RNK	Carroll, Craig, Giles, Montgomery, Pulaski, Roanoke and 1 more	64 min
Sep 28, 9:12 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lynchburg	52 min
Sep 28, 9:36 PM EDT	Special Weather Statement	RNK	Bedford, Franklin, Henry, City of Martinsville	69 min
Sep 28, 10:28 PM EDT	Special Weather Statement	RNK	Botetourt	47 min
Sep 29, 2:27 AM EDT	Special Weather Statement	RNK	Halifax	63 min
Sep 29, 1:19 PM EDT	Special Weather Statement	RNK	Carroll, Pulaski	56 min
Sep 29, 1:45 PM EDT	Special Weather Statement	RNK	Tazewell	60 min
Sep 29, 2:18 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Pulaski	57 min
Sep 29, 2:50 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Patrick	55 min
Sep 29, 3:15 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	60 min
Sep 29, 3:54 PM EDT	Special Weather Statement	RNK	Craig, Montgomery, Roanoke	66 min
Sep 29, 3:57 PM EDT	Areal Flood Advisory	RNK	Craig, Montgomery, Roanoke, City of Salem	3 hr
Sep 29, 4:17 PM EDT	Severe Thunderstorm Warning	RNK	Floyd, Franklin, Patrick	58 min
Sep 29, 4:40 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany	47 min
Sep 29, 4:54 PM EDT	Special Weather Statement	RNK	Tazewell	66 min
Sep 29, 5:09 PM EDT	Areal Flood Advisory	RNK	Alleghany, Bath, Botetourt, City of Covington	3 hr
Sep 29, 5:13 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, City of Martinsville	62 min
Sep 29, 5:18 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Floyd, Franklin, Roanoke, City of Roanoke	57 min
Sep 29, 5:51 PM EDT	Special Weather Statement	RNK	Grayson	54 min
Sep 29, 6:16 PM EDT	Areal Flood Advisory	RNK	Carroll, Grayson, City of Galax	119 min
Sep 29, 6:20 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Roanoke	55 min
Sep 29, 6:26 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Henry, Pittsylvania	64 min
Sep 29, 6:53 PM EDT	Special Weather Statement	RNK	Bland, Grayson, Wythe	52 min
Sep 29, 7:15 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Rockbridge, City of Buena Vista, City of Lexington	60 min
Sep 29, 7:42 PM EDT	Flash Flood Watch	RNK	Alleghany, Amherst, Bath, Botetourt, Rockbridge, City of Buena Vista and 2 more	8 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.