Alert archive / Nebraska / Flash Flood Warnings in 2009
Flash Flood Warning 13, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 29, 2009, 9:34 PM MDT for Dawes County, Nebraska. It was in force for 68 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
- Jun 29, 2009, 9:34 PM MDT (03:34 UTC)
- Expired
- Jun 29, 2009, 10:42 PM MDT
- In force
- 68 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
County Dawes County, NE
The radar
The Rapid City radar (KUDX), 158 km from the middle of the area, began a volume at 03:38 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
Rapid City, SD (KUNR), launched 00:00Z, 3.6 hours before the alert went out and 151 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3438 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KCYS 300334 FFWCYS NEC045-300630- /O.NEW.KCYS.FF.W.0013.090630T0334Z-090630T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 934 PM MDT MON JUN 29 2009 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN DAWES COUNTY IN THE PANHANDLE OF NEBRASKA * UNTIL 1230 AM MDT * AT 925 PM MDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED SOME FLASH FLOODING OF STREETS IN THE CHADRON AREA. THUNDERSTORMS WITH HEAVY RAINFALL WILL LINGER ACROSS THE WARNED AREA THROUGH 10 PM. RADAR ESTIMATED ABOUT 2 INCHES OF RAIN HAD FALLEN IN THE CHADRON AREA AS OF 930 PM. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... CHADRON...CHADRON AIRPORT AND DEVILS BACKBONE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 4259 10278 4259 10293 4289 10314 4288 10279 $$
1 follow-up statement
682 WGUS75 KCYS 300442 FFSCYS FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1042 PM MDT MON JUN 29 2009 NEC045-300455- /O.CAN.KCYS.FF.W.0013.000000T0000Z-090630T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DAWES NE- 1042 PM MDT MON JUN 29 2009 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN DAWES COUNTY IS CANCELLED... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. FLOODING ON STREETS IN THE CHADRON AREA HAS ENDED AS OF 1040 PM... SO THE WARNING HAS BEEN CANCELLED. IF ANY FLOODING WAS OBSERVED... PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 4259 10278 4259 10293 4289 10314 4288 10279 $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:23 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 52 min |
Nearby
Flash Flood Warnings in Nebraska, 2009Every flash flood warning in 2009
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.