Alert archive / Nebraska / Flash Flood Warnings in 2011
Flash Flood Warning 16, NWS North Platte, NE
NWS North Platte, NE issued this flash flood warning at Aug 4, 2011, 8:58 PM MDT for Arthur County, McPherson County, Nebraska. It was in force for 6 hr. 1 report 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 4, 2011, 8:58 PM MDT (02:58 UTC)
- Expired
- Aug 5, 2011, 2:34 AM MDT
- In force
- 6 hr
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Flood severity
- None
Counties Arthur County, NE, McPherson County, NE
The radar
The North Platte radar (KLNX), 86 km from the middle of the area, began a volume at 03:01 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 4, 9:30 PM MDT | FLASH FLOOD | Arthur, NE | RAINFALL TOTAL IN ARTHUR WAS 3.20 INCHES. WATER WAS RUNNING OVER ROADS NEAR THE FAIRGROUNDS...AND WATER IN FIRE HALL BUILDING WAS 2 INCHES IN DEPTH AS A RESULT OF THE FLASH FLOODING AND HEAVY RAINFALL. DELAYED REPORT RELAYED BY COOPERATIVE WEATHER OBSERVER. |
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, 3.0 hours before the alert went out and 94 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.
- Mixed-layer CAPE
- 1463 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1429 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
070
WGUS53 KLBF 050258
FFWLBF
NEC005-117-050900-
/O.NEW.KLBF.FF.W.0016.110805T0258Z-110805T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
858 PM MDT THU AUG 4 2011
THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
ARTHUR COUNTY IN WEST CENTRAL NEBRASKA...
NORTHWESTERN MCPHERSON COUNTY IN WEST CENTRAL NEBRASKA...
* UNTIL 300 AM MDT FRIDAY/400 AM CDT FRIDAY/
* AT 854 PM MDT/954 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS
THE WARNED AREA. NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES
THAT GREATER THAN FIVE INCHES HAS FALLEN OVER CENTRAL ARTHUR
COUNTY AND OVER PORTIONS OF NORTHWESTERN MCPHERSON COUNTY.
ADDITIONAL RAINFALL OF ONE OR TWO INCHES WILL BE POSSIBLE.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ARTHUR...BUCKTAIL LAKE...DIAMOND BAR LAKE...HAYTHORN LAKE...JENSEN
LAKE...SAND BEACH LAKE...SAND PUDDIN LAKE...SCHNICK LAKE AND
THREE MILE LAKE.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
SOUTH FORK DISMAL RIVER.
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.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 4173 10100 4144 10140 4140 10197 4173 10199
4174 10171
$$
JACOBS2 follow-up statements
692
WGUS73 KLBF 050441
FFSLBF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1041 PM MDT THU AUG 4 2011
NEC005-117-050900-
/O.CON.KLBF.FF.W.0016.000000T0000Z-110805T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MCPHERSON NE-ARTHUR NE-
1041 PM MDT THU AUG 4 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ARTHUR AND NORTHWESTERN
MCPHERSON COUNTIES UNTIL 300 AM MDT/400 AM CDT/...
AT 1037 PM MDT/1137 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED
AREA. RADAR ESTIMATES THAT GREATER THAN SIX INCHES OF RAIN HAS
FALLEN OVER PORTIONS OF NORTHWESTERN MCPHERSON COUNTY AND MUCH OF
CENTRAL ARTHUR COUNTY.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
ARTHUR...BUCKTAIL LAKE...DIAMOND BAR LAKE...HAYTHORN LAKE...JENSEN
LAKE...SAND BEACH LAKE...SAND PUDDIN LAKE...SCHNICK LAKE AND THREE
MILE LAKE.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
SOUTH FORK DISMAL RIVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS OF UP TO ONE INCH IS STILL POSSIBLE IN THE
WARNED AREA.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT
TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT
OR BY AUTOMOBILE.
&&
LAT...LON 4173 10100 4144 10140 4140 10197 4173 10199
4174 10171
$$
JACOBS303
WGUS73 KLBF 050834
FFSLBF
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
234 AM MDT FRI AUG 5 2011
NEC005-117-050848-
/O.CAN.KLBF.FF.W.0016.000000T0000Z-110805T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MCPHERSON NE-ARTHUR NE-
234 AM MDT FRI AUG 5 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR ARTHUR AND
NORTHWESTERN MCPHERSON COUNTIES IS CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
A FLOOD ADVISORY IS NOW IN EFFECT FOR ARTHUR AND NORTHWESTERN
MCPHERSON COUNTIES UNTIL 830 AM MDT.
LAT...LON 4173 10100 4144 10140 4140 10197 4173 10199
4174 10171
$$
CDCThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 6:53 PM MDT | Severe Thunderstorm Warning | LBF | Garden, Sheridan | 67 min |
| Aug 4, 7:50 PM MDT | Severe Thunderstorm Warning | LBF | Garden | 40 min |
| Aug 4, 8:30 PM MDT | Areal Flood Advisory | LBF | Arthur, Grant, Hooker, McPherson | 6 hr |
| Aug 5, 2:33 AM MDT | Areal Flood Advisory | LBF | Arthur, McPherson | 6 hr |
Nearby
Flash Flood Warnings in Nebraska, 2011Every 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.