Alert archive / Nebraska / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 16, 2011, 4:19 PM MDT for 6 counties in Nebraska. It was in force for 6 hr. 1 report 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 16, 2011, 4:19 PM MDT (22:19 UTC)
- Expired
- Jun 16, 2011, 10:30 PM MDT
- In force
- 6 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Banner County, NE, Box Butte County, NE, Dawes County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE
The radar
The Cheyenne radar (KCYS), 157 km from the middle of the area, began a volume at 22:20 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 16, 6:00 PM MDT | FLASH FLOOD | 5 Ne Bonner, NE | HIGHWAY 385 CLOSED WITH 12 INCHES OF WATER OVER ROADWAY. IT HAS SINCE REOPENED. |
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, 10.3 hours before the alert went out and 229 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
- 2399 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -110 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.
801
WGUS55 KCYS 162219
FFWCYS
NEC007-013-045-123-157-165-170430-
/O.NEW.KCYS.FF.W.0002.110616T2219Z-110617T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
419 PM MDT THU JUN 16 2011
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BOX BUTTE COUNTY IN THE PANHANDLE OF NEBRASKA...
EASTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...
EASTERN SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA...
EXTREME SOUTH CENTRAL DAWES COUNTY IN THE PANHANDLE OF NEBRASKA...
MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA...
SOUTHEASTERN SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA...
* UNTIL 1030 PM MDT
* AT 418 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.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ALLIANCE...ALLIANCE AIRPORT...ANGORA...BAYARD...BEREA...BOX BUTTE
DAM...BRIDGEPORT...CHIMNEY ROCK...HEMINGFORD...HUBBARD GAP...
KILPATRICK LAKE...LAKE MINATARE...MINATARE...MUD SPRINGS...
REDINGTON AND WILD HORSE BUTTE.
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 4144 10288 4146 10375 4211 10342 4215 10372
4246 10326 4243 10274
$$
CLAYCOMB1 follow-up statement
583
WGUS75 KCYS 170421
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
1021 PM MDT THU JUN 16 2011
NEC007-013-045-123-157-165-170436-
/O.EXP.KCYS.FF.W.0002.000000T0000Z-110617T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BANNER NE-BOX BUTTE NE-DAWES NE-MORRILL NE-SCOTTS BLUFF NE-SIOUX NE-
1021 PM MDT THU JUN 16 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
SIOUX...EASTERN SCOTTS BLUFF...MORRILL...EXTREME SOUTH CENTRAL
DAWES...BOX BUTTE AND EASTERN BANNER COUNTIES WILL BE ALLOWED TO
EXPIRE AT 1030 PM MDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 4144 10288 4146 10375 4211 10342 4215 10372
4246 10326 4243 10274
$$
CLAYCOMBThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 2:28 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 23 min |
| Jun 16, 2:36 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff | 24 min |
| Jun 16, 2:51 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Scotts Bluff | 54 min |
| Jun 16, 2:55 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 43 min |
| Jun 16, 3:23 PM MDT | Flash Flood Warning | CYS | Banner, Scotts Bluff, Sioux | 12 hr |
| Jun 16, 3:36 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Box Butte, Morrill, Scotts Bluff, Sioux | 39 min |
| Jun 16, 4:09 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Box Butte, Morrill, Scotts Bluff, Sioux | 51 min |
| Jun 16, 4:53 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Morrill | 37 min |
| Jun 16, 5:55 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Kimball | 50 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.