Alert archive / Nebraska / Flash Flood Warnings in 2011
Flash Flood Warning 1, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 16, 2011, 3:23 PM MDT for Goshen County, Laramie County, Wyoming; Banner County, Scotts Bluff County, Sioux County, Nebraska. It was in force for 12 hr. 8 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 16, 2011, 3:23 PM MDT (21:23 UTC)
- Expired
- Jun 17, 2011, 3:30 AM MDT
- In force
- 12 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Banner County, NE, Scotts Bluff County, NE, Sioux County, NE, Goshen County, WY, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 103 km from the middle of the area, began a volume at 21:25 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, 3:54 PM MDT | HEAVY RAIN 0 | 3 Ne Mitchell, NE | VISIBILITY LESS THAN A QUARTER MILE. WATER PONDING AND RUNNING FAST ON GROUND. |
| Jun 16, 4:00 PM MDT | FLASH FLOOD | 3 N Scottsbluff, NE | WATER RUNNING FAST ON ROAD IN WESTERN NEBRASKA COMMUNITY COLLEGE CAMPUS |
| Jun 16, 4:14 PM MDT | FLASH FLOOD | Lyman, NE | ROADWAYS UNDER WATER IN LYMAN. HWY 92 WEST OF MORRILL CLOSED DUE TO FLOODING AS WELL. |
| Jun 16, 4:20 PM MDT | FLASH FLOOD | 3 S Mitchell, NE | COUNTY ROAD G CLOSED FOR A 2 MILE STRETCH BETWEEN SOUTH MITCHELL ROAD AND COUNTY ROAD 13. REMAINS CLOSED AS OF 9 PM. |
| Jun 16, 4:29 PM MDT | FLASH FLOOD | La Grange, WY | ROADWAYS FLOODED WITH RUNOFF. HEAVY RAIN HAS ENDED. |
| Jun 16, 4:35 PM MDT | FLASH FLOOD | Scottsbluff, NE | WATER COVERING 5TH AVENUE WITH 4-6 INCHES OF WATER. |
| Jun 16, 6:10 PM MDT | FLASH FLOOD | Scottsbluff, NE | INTERSECTION OF 5TH AND OVERLAND CLOSED WITH 6 TO 7 INCHES OF WATER. |
| Jun 16, 8:05 PM MDT | FLASH FLOOD | Scottsbluff, NE | SEVERAL ROADS FLOODED AND CLOSED IN AND AROUND SCOTTSBLUFF |
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, 9.4 hours before the alert went out and 223 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.
606
WGUS55 KCYS 162123
FFWCYS
NEC007-157-165-WYC015-021-170330-
/O.NEW.KCYS.FF.W.0001.110616T2123Z-110617T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
323 PM MDT THU JUN 16 2011
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN LARAMIE COUNTY IN SOUTHEAST WYOMING...
SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA...
SOUTHEASTERN GOSHEN COUNTY IN SOUTHEAST WYOMING...
SOUTHERN SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA...
WESTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...
* UNTIL 930 PM MDT
* AT 322 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RADAR ESTIMATED RAINFALL RATES IN EXCESS OF 2 INCHES
PER HOURS ARE BEING OBSERVED.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SCOTTSBLUFF...GERING...HARRISBURG...HAWK SPRINGS...HAWK SPRINGS
RECREATION AREA...LA GRANGE...LAKE ALICE...LYMAN...MERIDEN REST
AREA...MITCHELL...MORRILL...SCOTTS BLUFF NATIONAL MONUMENT...
SCOTTSBLUFF AIRPORT...STEGALL...TERRYTOWN AND WILDCAT HILLS STATE
RECREATION AREA.
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 4152 10442 4219 10411 4212 10344 4209 10343
4140 10379
$$2 follow-up statements
058
WGUS55 KCYS 170301
FFWCYS
NEC007-157-165-WYC015-021-170930-
/O.EXT.KCYS.FF.W.0001.000000T0000Z-110617T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
901 PM MDT THU JUN 16 2011
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
NORTHEASTERN LARAMIE COUNTY IN SOUTHEAST WYOMING...
SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA...
SOUTHEASTERN GOSHEN COUNTY IN SOUTHEAST WYOMING...
SOUTHERN SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA...
WESTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...
* UNTIL 330 AM MDT FRIDAY
* AT 845 PM MDT...EMERGENCY MANAGEMENT IN SCOTTS BLUFF COUNTY REPORTED
WATER OVER COUNTY ROAD G SOUTH OF MITCHELL. THE WATER WAS OVER THAT
ROAD BETWEEN THE SOUTH MITCHELL ROAD AND COUNTY ROAD 13. COUNTY ROAD
G REMAINS CLOSED AS OF 845 PM DUE TO THE WATER OVER A TWO MILE
STRETCH OF THE ROAD. SOME ROADS WERE ALSO CLOSED DUE TO FLOODING IN
THE SCOTTSBLUFF AND GERING AREAS. RAINFALL AMOUNTS IN THE WARNING
AREA HAVE BEEN UP TO 2 INCHES THIS EVENING AND CONSIDERABLE STANDING
WATER IS CURRENTLY IN THE WARNED AREA. ADDITIONAL RAINFALL WILL BE
UP TO 1.5 INCHES THROUGH 11 PM IN THE WARNED AREA WITH WATER LEVELS
SLOWLY RECEDING AFTER THAT TIME.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SCOTTSBLUFF...GERING...HARRISBURG...HAWK SPRINGS...HAWK SPRINGS
RECREATION AREA...LA GRANGE...LAKE ALICE...LYMAN...MERIDEN REST
AREA...MITCHELL...MORRILL...SCOTTS BLUFF NATIONAL MONUMENT...
SCOTTSBLUFF AIRPORT...STEGALL...TERRYTOWN AND WILDCAT HILLS STATE
RECREATION AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.
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.
&&
LAT...LON 4152 10442 4219 10411 4212 10344 4209 10343
4140 10379
$$
MSW738
WGUS75 KCYS 170925
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
325 AM MDT FRI JUN 17 2011
NEC007-157-165-WYC015-021-170935-
/O.EXP.KCYS.FF.W.0001.000000T0000Z-110617T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BANNER NE-SCOTTS BLUFF NE-GOSHEN WY-SIOUX NE-LARAMIE WY-
325 AM MDT FRI JUN 17 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHEASTERN
LARAMIE...SOUTHERN SIOUX...SOUTHEASTERN GOSHEN...SCOTTS BLUFF AND
WESTERN BANNER COUNTIES WILL BE ALLOWED TO EXPIRE AT 330 AM MDT...
THE HEAVIER RAINFALL ENDED OVER THE AREA BY MIDNIGHT. SINCE THAT TIME...
WATER LEVELS HAVE BEEN SLOWLY RECEDING. IN SCOTTS BLUFF COUNTY THERE
CONTINUES TO BE WATER OVER SOME COUNTY ROADS AND COUNTY ROAD G TO THE
SOUTH OF MITCHELL REMAINS CLOSED AS OF 3 AM.
THE THREAT OF FLASH FLOODING HAS ENDED OVER THE WARNED AREA. HOWEVER...
WITH HIGH WATER LEVELS IN AREA RIVER AND STREAMS...WATER AFFECTING SOME
ROADS AND CONSIDERABLE STANDING WATER...WILL REPLACE THE FLASH FLOOD
WARNING WITH AN AREAL FLOOD WARNING SOON.
LAT...LON 4152 10442 4219 10411 4212 10344 4209 10343
4140 10379
$$
MSWThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 7:24 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 36 min |
| Jun 16, 1:21 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 39 min |
| Jun 16, 1:50 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 40 min |
| Jun 16, 1:59 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 46 min |
| Jun 16, 2:28 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 23 min |
| Jun 16, 2:36 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 24 min |
| Jun 16, 2:51 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 54 min |
| Jun 16, 2:55 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 43 min |
| 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, 4:19 PM MDT | Flash Flood Warning | CYS | Banner, Box Butte, Dawes, Morrill, Scotts Bluff, Sioux | 6 hr |
| 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, 2011Flash Flood Warnings in Wyoming, 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.