Alert archive / Nebraska / Flash Flood Warnings in 2011

Flash Flood Warning 4, NWS Cheyenne, WY

June 19, 2011Kimball County, Nebraska

NWS Cheyenne, WY issued this flash flood warning at Jun 19, 2011, 2:27 PM MDT for Kimball County, Nebraska. It was in force for 70 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 19, 2011, 2:27 PM MDT (20:27 UTC)
Expired
Jun 19, 2011, 3:37 PM MDT
In force
70 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Flood severity
None

County Kimball County, NE

The radar

The Cheyenne radar (KCYS), 109 km from the middle of the area, began a volume at 20:30 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

Denver, CO (KDNR), launched 12:00Z, 8.5 hours before the alert went out and 146 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°0°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.

357 
WGUS55 KCYS 192027
FFWCYS
NEC105-192330-
/O.NEW.KCYS.FF.W.0004.110619T2027Z-110619T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

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

* UNTIL 530 PM MDT

* AT 226 PM MDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH     
  FLOODING ACROSS THE WARNED AREA. RAINFALL AMOUNTS OF 1 TO 3 INCHES 
  CAN BE EXPECTED FROM THIS THUNDERSTORM PRODUCING TORRENTIAL RAIN.

* FLASH FLOODING IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS OF     
  SOUTHEASTERN KIMBALL COUNTY...INCLUDING I-80 EXIT 29.

LAT...LON 4124 10361 4123 10337 4120 10337 4106 10342
      4101 10368

$$

RUBIN
1 follow-up statement
059 
WGUS75 KCYS 192137
FFSCYS

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

NEC105-192151-
/O.CAN.KCYS.FF.W.0004.000000T0000Z-110619T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KIMBALL NE-
337 PM MDT SUN JUN 19 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN 
KIMBALL COUNTY IS BEING REPLACED BY AN EXPANDED FLASH FLOOD WARNING 
FOR THE ENTIRE COUNTY...

IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW 
ENFORCEMENT AGENCY.

LAT...LON 4124 10361 4123 10337 4120 10337 4106 10342
      4101 10368

$$

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, 2:40 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, 3:33 PM MDTFlash Flood WarningCYSKimball6 hr
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.