Alert archive / Nebraska / Flash Flood Warnings in 2011

Flash Flood Warning 7, NWS Cheyenne, WY

June 19, 2011Kimball County, Nebraska

NWS Cheyenne, WY issued this flash flood warning at Jun 19, 2011, 3:33 PM MDT for Kimball 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
Jun 19, 2011, 3:33 PM MDT (21:33 UTC)
Expired
Jun 19, 2011, 9:15 PM MDT
In force
6 hr
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Flood severity
None

County Kimball County, NE

The radar

The Cheyenne radar (KCYS), 85 km from the middle of the area, began a volume at 21:35 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

TimeReportWhereRemark
Jun 19, 4:21 PM MDTFLASH FLOOD5 Sw Bushnell, NECOUNTY ROADS 6...8...11 FLOODED
Jun 19, 5:21 PM MDTFLASH FLOOD3 E Dix, NECOUNTY ROAD 60 FLOODED AND CLOSED OVER LODGEPOLE CREEK

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

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.6 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.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2011-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 330 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2011-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
330 J/kg
Mixed-layer CIN
-236 J/kg
Mixed-layer LCL
1573 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

381 
WGUS55 KCYS 192133
FFWCYS
NEC105-200330-
/O.NEW.KCYS.FF.W.0007.110619T2133Z-110620T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
333 PM MDT SUN JUN 19 2011

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KIMBALL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 930 PM MDT

* AT 330 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RADAR ESTIMATED HOURLY RAINFALL AMOUNTS IN EXCESS OF  
  2 INCHES PER HOUR ARE BEING OBSERVED. THUNDERSTORMS ARE MOVING     
  SLOWLY AND TRAINING OVER THE SAME AREAS. THIS MUCH HEAVY RAINFALL  
  WILL LEAD TO FLASH FLOODING. THIS FLASH FLOOD WARNING WILL REPLACE 
  THE WARNING CURRENTLY IN EFFECT FOR THE SOUTHEASTERN PORTION OF    
  KIMBALL COUNTY CURRENTLY IN EFFECT.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  KIMBALL...BENNETT RESERVOIR...DIX...KIMBALL AIRPORT...OLIVER
  RESERVOIR AND PANORAMA POINT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
CHEYENNE.

&&

LAT...LON 4100 10406 4139 10405 4139 10338 4101 10338

$$

CLAYCOMB
1 follow-up statement
868 
WGUS75 KCYS 200315
FFSCYS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
915 PM MDT SUN JUN 19 2011

NEC105-200330-
/O.CAN.KCYS.FF.W.0007.000000T0000Z-110620T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KIMBALL NE-
915 PM MDT SUN JUN 19 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR KIMBALL COUNTY 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. SHOWERS AND THUNDERSTORMS WILL 
CONTINUE THIS EVENING...BUT HEAVY RAIN IS NOT EXPECTED. IF FLOODING 
HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT 
AGENCY.

LAT...LON 4100 10406 4139 10405 4139 10338 4101 10338

$$

CLAYCOMB

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 6:23 PM MDTFlash Flood WatchCYSBanner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more45 hr
Jun 19, 1:45 PM MDTSevere Thunderstorm WarningCYSKimball60 min
Jun 19, 2:27 PM MDTFlash Flood WarningCYSKimball70 min
Jun 19, 2:40 PM MDTSevere Thunderstorm WarningCYSCheyenne, Kimball31 min
Jun 19, 2:53 PM MDTFlash Flood WarningCYSCheyenne92 min
Jun 19, 3:08 PM MDTTornado WarningCYSCheyenne37 min
Jun 19, 3:25 PM MDTSevere Thunderstorm WarningCYSKimball65 min
Jun 19, 3:46 PM MDTSevere Thunderstorm WarningCYSCheyenne44 min
Jun 19, 4:21 PM MDTFlash Flood WarningCYSCheyenne6 hr
Jun 19, 4:26 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Kimball, Morrill23 min
Jun 19, 4:46 PM MDTSevere Thunderstorm WarningCYSCheyenne59 min

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.