Flash Flood Warning 39, NWS Omaha, NE

Issued

Aug 22, 2011, 3:49 AM CDT (08:49 UTC)

Expired

Aug 22, 2011, 7:34 AM CDT

In force

4 hr

Issued by

NWS Omaha, NE

Area

Storm-based polygon

Flood severity

None

Counties Burt County, NE, Cuming County, NE, Thurston County, NE, Wayne County, NE

The Omaha radar (KOAX), 99 km from the middle of the area, began a volume at 08:52 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.

221 
WGUS53 KOAX 220849
FFWOAX
NEC021-039-173-179-221300-
/O.NEW.KOAX.FF.W.0039.110822T0849Z-110822T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
349 AM CDT MON AUG 22 2011

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WAYNE COUNTY IN NORTHEAST NEBRASKA
  NORTHEASTERN CUMING COUNTY IN NORTHEAST NEBRASKA
  NORTHWESTERN BURT COUNTY IN EAST CENTRAL NEBRASKA
  THURSTON COUNTY IN NORTHEAST NEBRASKA

* UNTIL 800 AM CDT

* AT 342 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE   
  WARNED AREA. RADAR ESTIMATES 2 TO 3 INCHES OF RAIN HAS FALLEN...
  AND ANOTHER INCH OF RAIN IS POSSIBLE FOR PARTS OF THE WARNED AREA
  THROUGH 5 AM. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BANCROFT...EMERSON...PENDER...WALTHILL AND WINNEBAGO.

THE WARNED AREA INCLUDES HIGHWAY 77 IN NEBRASKA BETWEEN MILE MARKERS
154 AND 169.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS. USE ALTERNATE ROUTES AROUND FLOOD PRONE
AREAS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

LAT...LON 4228 9650 4198 9628 4196 9668 4227 9695
      4227 9674 4228 9673

$$

DERGAN

500 
WGUS73 KOAX 221015
FFSOAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
515 AM CDT MON AUG 22 2011

NEC021-039-173-179-221300-
/O.CON.KOAX.FF.W.0039.000000T0000Z-110822T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BURT NE-CUMING NE-THURSTON NE-WAYNE NE-
515 AM CDT MON AUG 22 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EAST CENTRAL WAYNE...
WESTERN THURSTON...NORTHEASTERN CUMING AND NORTHWESTERN BURT COUNTIES
UNTIL 800 AM CDT...

AT 512 AM CDT...WEATHER SERVICE DOPPLER RADAR SHOWED MOST OF THE 
THUNDERSTORM ACTIVITY HAD ENDED OVER THE WARNING AREA. HOWEVER 
ESTIMATED RAINFALL FROM RADAR WAS IN THE 2 TO 4 INCH RANGE FROM 
PREVIOUS STORMS. THIS AMOUNT OF RAIN IS LIKELY CAUSING FLOODING 
ACROSS ROADS AND LOW LYING AREAS. THE FLASH FLOOD WARNING WILL 
CONTINUE UNTIL FLOOD WATERS HAVE A CHANCE TO RECEDE.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BANCROFT AND
PENDER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... AS WELL AS
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4221 9661 4198 9628 4196 9668 4227 9695
      4227 9674 4228 9673

$$

DERGAN

856 
WGUS73 KOAX 221234
FFSOAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
734 AM CDT MON AUG 22 2011

NEC021-039-173-179-221248-
/O.CAN.KOAX.FF.W.0039.000000T0000Z-110822T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BURT NE-CUMING NE-THURSTON NE-WAYNE NE-
734 AM CDT MON AUG 22 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EAST CENTRAL
WAYNE...WESTERN THURSTON...NORTHEASTERN CUMING AND NORTHWESTERN BURT
COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED FOR THE MOST PART OVER THE 
WARNED AREA. SOME PONDING OF WATER FROM EARLIER RAINFALL...OR CREEKS 
RUNNING HIGHER THAN NORMAL CAN BE EXPECTED THROUGH MID MORNING. IF 
FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW 
ENFORCEMENT AGENCY.

LAT...LON 4221 9661 4198 9628 4196 9668 4227 9695
      4227 9674 4228 9673

$$

DERGAN

Flash Flood Warnings in Nebraska, 2011Every flash flood warning in 2011

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.