Alert archive / Nebraska / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS North Platte, NE
NWS North Platte, NE issued this flash flood warning at May 23, 2011, 8:22 PM MDT for Chase County, Nebraska. It was in force for 4 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
- May 23, 2011, 8:22 PM MDT (02:22 UTC)
- Expired
- May 24, 2011, 12:30 AM MDT
- In force
- 4 hr
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Flood severity
- None
County Chase County, NE
The radar
The Goodland radar (KGLD), 133 km from the middle of the area, began a volume at 02:23 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.4 hours before the alert went out and 101 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
- 293 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 2020 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
449 WGUS53 KLBF 240222 FFWLBF NEC029-240630- /O.NEW.KLBF.FF.W.0002.110524T0222Z-110524T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 822 PM MDT MON MAY 23 2011 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN CHASE COUNTY IN SOUTHWEST NEBRASKA... * UNTIL 1230 AM MDT * AT 820 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. ESTIMATED RAINFALL AMOUNTS EXCEEDING TWO INCHES OVER THE PAST TWO HOURS ARE LIKELY TO CAUSE EXCESSIVE RUNOFF. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... IMPERIAL...CHAMPION...ENDERS...ENDERS RESERVOIR STATE RECREATION AREA AND WAUNETA. 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 4070 10135 4035 10134 4035 10179 4069 10180 $$ SPRINGER
2 follow-up statements
849 WGUS73 KLBF 240501 FFSLBF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 1101 PM MDT MON MAY 23 2011 NEC029-240630- /O.CON.KLBF.FF.W.0002.000000T0000Z-110524T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CHASE NE- 1101 PM MDT MON MAY 23 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EASTERN CHASE COUNTY UNTIL 1230 AM MDT... AT 1058 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL HAD MOVED ACROSS THE WARNED AREA. ESTIMATED RAINFALL AMOUNTS EXCEEDING TWO INCHES OVER THE PAST FOUR HOURS ARE LIKELY TO CAUSE EXCESSIVE RUNOFF. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... IMPERIAL...CHAMPION...ENDERS...ENDERS RESERVOIR STATE RECREATION AREA AND WAUNETA. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. MOST FLOOD RELATED DEATHS OCCUR IN VEHICLES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT OR IN A VEHICLE. && LAT...LON 4070 10135 4035 10134 4035 10179 4069 10180 $$ MASEK
405 WGUS73 KLBF 240634 FFSLBF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 1234 AM MDT TUE MAY 24 2011 NEC029-240647- /O.EXP.KLBF.FF.W.0002.000000T0000Z-110524T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CHASE NE- 1234 AM MDT TUE MAY 24 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN CHASE COUNTY HAS BEEN ALLOWED TO EXPIRE... 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 FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY EVENING AS ADDITIONAL HEAVY RAINFALL WILL BE POSSIBLE LATER TODAY AND WEDNESDAY. LAT...LON 4070 10135 4035 10134 4035 10179 4069 10180 $$ MASEK
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 6:19 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 41 min |
| May 23, 6:56 PM MDT | Severe Thunderstorm Warning | LBF | Frontier, Hayes | 49 min |
| May 23, 7:00 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 45 min |
| May 23, 7:45 PM MDT | Severe Thunderstorm Warning | LBF | Chase | 45 min |
| May 24, 1:46 PM MDT | Wind Advisory | LBF | Arthur, Blaine, Boyd, Brown, Chase, Cherry and 16 more | 25 hr |
| May 24, 3:10 PM MDT | River Flood Warning | LBF | Lincoln | 42 days |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.