Alert archive / Nebraska / Flash Flood Warnings in 2011

Flash Flood Warning 3, NWS North Platte, NE

May 24, 2011Frontier County, Hayes County, Nebraska

NWS North Platte, NE issued this flash flood warning at May 24, 2011, 7:47 PM CDT for Frontier County, Hayes County, Nebraska. 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: May 24, 2011, 7:47 PM CDT (00:47 UTC)
Expired: May 25, 2011, 1:54 AM CDT
In force: 6 hr
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Flood severity: None

Counties Frontier County, NE, Hayes County, NE

The radar

The Goodland radar (KGLD), 144 km from the middle of the area, began a volume at 00:50 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
May 24, 7:57 PM CDT	HEAVY RAIN 1.2	5 W Hayes Center, NE	1.20 INCHES OF RAIN WAS MEASURED IN 15 MINUTES.
May 25, 1:45 AM CDT	FLASH FLOOD	5 Se Stockville, NE	FLASH FLOOD CONDITIONS WERE OBSERVED AT THE MEDICENE CREEK GAUGE. THE CREEK ROSE NEARLY 10 FEET IN 2 HOURS...AND IS CURRENTLY 2 FEET OVER FLOOD STAGE.

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

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.8 hours before the alert went out and 73 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: 786 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1162 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

077 
WGUS53 KLBF 250047
FFWLBF
NEC063-085-250700-
/O.NEW.KLBF.FF.W.0003.110525T0047Z-110525T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
747 PM CDT TUE MAY 24 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FRONTIER COUNTY IN SOUTHWEST NEBRASKA...
  HAYES COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 200 AM CDT WEDNESDAY

* AT 745 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CURTIS...HAYES CENTER...HAMLET...HAYES CENTER STATE WILDLIFE
  MANAGEMENT AREA...MAYWOOD...MEDICINE CREEK RESERVOIR STATE
  RECREATION AREA...MOOREFIELD...RED WILLOW RESERVOIR STATE
  RECREATION AREA AND STOCKVILLE.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN VEHICLES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS...
OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A
SMALL ONE...ON FOOT OR IN A VEHICLE.

&&

LAT...LON 4035 10123 4064 10135 4068 10134 4070 10015
      4035 10010

$$

SPRINGER

3 follow-up statements

769 
WGUS73 KLBF 250225
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
925 PM CDT TUE MAY 24 2011

NEC063-085-250700-
/O.CON.KLBF.FF.W.0003.000000T0000Z-110525T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRONTIER NE-HAYES NE-
925 PM CDT TUE MAY 24 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR HAYES AND FRONTIER
COUNTIES UNTIL 200 AM CDT...

AT 924 PM CDT...RUNOFF FROM HEAVY RAIN CONTINUES. RAINFALL RATES 
HAVE DECREASED OVER THE AREA...BUT RUNOFF CAN CONTINUE FOR SEVERAL 
HOURS AFTER RAINFALL ENDS. ADDITIONAL HEAVY RAIN MAY REDEVELOP 
OVERNIGHT.  

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CURTIS...HAYES CENTER...HAMLET...HAYES CENTER STATE WILDLIFE
MANAGEMENT AREA...MAYWOOD...MEDICINE CREEK RESERVOIR STATE RECREATION
AREA...MOOREFIELD...RED WILLOW RESERVOIR STATE RECREATION AREA AND
STOCKVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD RELATED DEATHS OCCUR IN VEHICLES. DO NOT ATTEMPT TO CROSS
BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT OR
IN A VEHICLE.

&&

LAT...LON 4035 10123 4064 10135 4068 10134 4070 10015
      4035 10010

$$

SPRINGER

989 
WGUS73 KLBF 250323
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1023 PM CDT TUE MAY 24 2011

NEC063-085-250700-
/O.CON.KLBF.FF.W.0003.000000T0000Z-110525T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRONTIER NE-HAYES NE-
1023 PM CDT TUE MAY 24 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR HAYES AND FRONTIER
COUNTIES UNTIL 200 AM CDT...

AT 1020 PM CDT...THUNDERSTORMS WITH HEAVY RAIN CONTINUED NORTH OF 
THE AREA. EXCESSIVE RUNOFF FROM THOSE STORMS DRAINING INTO THE 
MEDICINE CREEK AND STINKING WATER CREEK AREAS STILL PRESENTS A RISK 
OF FLASH FLOODING OR AT LEAST RAPID CREEK RISES. EVEN AFTER THE RAIN 
ENDS...RUNOFF CAN CONTINUE FOR SEVERAL HOURS. 

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CURTIS...HAYES CENTER...HAMLET...HAYES CENTER STATE WILDLIFE
MANAGEMENT AREA...MAYWOOD...MEDICINE CREEK RESERVOIR STATE RECREATION
AREA...MOOREFIELD...RED WILLOW RESERVOIR STATE RECREATION AREA AND
STOCKVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD RELATED DEATHS OCCUR IN VEHICLES. DO NOT ATTEMPT TO CROSS
BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT OR
IN A VEHICLE.

&&

LAT...LON 4035 10123 4064 10135 4068 10134 4070 10015
      4035 10010

$$

SPRINGER

025 
WGUS73 KLBF 250654
FFSLBF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
154 AM CDT WED MAY 25 2011

NEC063-085-250705-
/O.CAN.KLBF.FF.W.0003.000000T0000Z-110525T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRONTIER NE-HAYES NE-
154 AM CDT WED MAY 25 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR HAYES AND FRONTIER
COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. A 
FLOOD WARNING HOWEVER HAS BEEN ISSUED FOR EASTERN FRONTIER COUNTY 
DUE TO RECENT HEAVY RAINFALL WITH MEDICINE CREEK FLOODING. NO 
ADDITIONAL FLOODING IS EXPECTED IN HAYES COUNTY. IF FLOODING HAS 
BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT 
AGENCY.

LAT...LON 4035 10123 4064 10135 4068 10134 4070 10015
      4035 10010

$$

ROBERG

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 1:48 AM CDT	Areal Flood Warning	LBF	Frontier	9 hr
May 25, 4:51 AM CDT	Areal Flood Warning	LBF	Lincoln	48 hr

Nearby

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

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.