Alert archive / Nebraska / Flash Flood Warnings in 2011
Flash Flood Warning 1, NWS North Platte, NE
NWS North Platte, NE issued this flash flood warning at May 19, 2011, 9:22 PM MDT for Keith County, Nebraska. It was in force for 71 min. 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 19, 2011, 9:22 PM MDT (03:22 UTC)
- Expired
- May 19, 2011, 10:33 PM MDT
- In force
- 71 min
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Flood severity
- None
County Keith County, NE
The radar
The North Platte radar (KLNX), 118 km from the middle of the area, began a volume at 03:24 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, 3.4 hours before the alert went out and 83 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
- 113 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 535 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
966 WGUS53 KLBF 200322 FFWLBF NEC101-200630- /O.NEW.KLBF.FF.W.0001.110520T0322Z-110520T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 922 PM MDT THU MAY 19 2011 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * FLASH FLOOD WARNING FOR MINOR FLOODING OF POOR DRAINAGE AREAS IN... EASTERN KEITH COUNTY IN SOUTHWEST NEBRASKA... * UNTIL 1230 AM MDT * AT 921 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 1 TO 2 INCHES OF RAIN WILL FALL IN ABOUT 1 HOURS TIME PRODUCING FLOODING. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... OGALLALA...KEYSTONE...PAXTON...ROSCOE AND SARBEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 4134 10179 4135 10128 4102 10126 4101 10178 $$ CDC
2 follow-up statements
348 WGUS73 KLBF 200351 FFSLBF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 951 PM MDT THU MAY 19 2011 NEC101-200630- /O.CON.KLBF.FF.W.0001.000000T0000Z-110520T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KEITH NE- 951 PM MDT THU MAY 19 2011 ...FLASH FLOOD WARNING FOR MINOR FLOODING OF POOR DRAINAGE AREAS REMAINS IN EFFECT FOR EASTERN KEITH COUNTY UNTIL 1230 AM MDT... AT 948 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL BETWEEN SARBEN AND PAXTON. AROUND 3/4 OF AN INCH OF RAIN HAS FALLEN IN SOME AREAS SOUTH OF INTERSTATE 80. UP TO 1 AND 1/2 INCHES OF TOTAL RAINFALL IS EXPECTED BEFORE THE THUNDERSTORMS MOVE NORTH OF THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... OGALLALA...KEYSTONE...PAXTON...ROSCOE AND SARBEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4134 10179 4135 10128 4102 10126 4101 10178 $$ CDC
585 WGUS73 KLBF 200433 FFSLBF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 1033 PM MDT THU MAY 19 2011 NEC101-200447- /O.CAN.KLBF.FF.W.0001.000000T0000Z-110520T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KEITH NE- 1033 PM MDT THU MAY 19 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN KEITH COUNTY IS CANCELLED... BETWEEN 1/2 AND 1 INCH OF RAIN FELL IN THE WARNED AREA. EXCESS RUNOFF FROM THIS 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. LAT...LON 4134 10179 4135 10128 4102 10126 4101 10178 $$ CDC
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 6:27 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 34 min |
| May 20, 9:36 AM MDT | River Flood Warning | LBF | Lincoln | 35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.