Alert archive / Wyoming / Flash Flood Warnings in 2012
Flash Flood Warning 4, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 6, 2012, 4:48 PM MDT for Goshen County, Laramie County, Platte County, Wyoming. It was in force for 4 hr. 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 6, 2012, 4:48 PM MDT (22:48 UTC)
- Expired
- Jun 6, 2012, 8:30 PM MDT
- In force
- 4 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 54 km from the middle of the area, began a volume at 22:49 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, 10.8 hours before the alert went out and 222 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
- 72 J/kg
- Mixed-layer CIN
- -389 J/kg
- Mixed-layer LCL
- 2428 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
243
WGUS55 KCYS 062248
FFWCYS
WYC015-021-031-070300-
/O.NEW.KCYS.FF.W.0004.120606T2248Z-120607T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
448 PM MDT WED JUN 6 2012
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL LARAMIE COUNTY IN SOUTHEAST WYOMING...
SOUTHEASTERN PLATTE COUNTY IN SOUTHEAST WYOMING...
SOUTHWESTERN GOSHEN COUNTY IN SOUTHEAST WYOMING...
* UNTIL 900 PM MDT
* AT 446 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RADAR ESTIMATES THAT 2 TO 4 INCHES OF RAIN HAS FALLEN
ACROSS AREAS EAST OF INTERSTATE 25 NORTH OF WHITAKER IN NORTH
CENTRAL LARAMIE COUNTY. THESE THUNDERSTORMS WILL CONTINUE TO MOVE
SLOWLY NORTHEAST INTO SOUTHEAST PLATTE AND SOUTHWEST GOSHEN
COUNTIES THROUGH 700 PM MDT...AND WILL PRODUCE SIMILAR
RAINFALL ACCUMULATIONS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...GUN
BARREL...HAWK SPRINGS AND MERIDEN REST AREA. THIS ALSO INCLUDES
LITTLE BEAR CREEK AND LEWIS DRAW IN NORTH CENTRAL LARAMIE COUNTY.
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.
&&
LAT...LON 4180 10424 4129 10426 4142 10486 4148 10488
4180 10477
$$
HAMMER/WEILAND2 follow-up statements
062
WGUS75 KCYS 070107
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
707 PM MDT WED JUN 6 2012
WYC015-021-031-070300-
/O.CON.KCYS.FF.W.0004.000000T0000Z-120607T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GOSHEN WY-LARAMIE WY-PLATTE WY-
707 PM MDT WED JUN 6 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN PLATTE...
NORTH CENTRAL LARAMIE AND SOUTHWESTERN GOSHEN COUNTIES UNTIL 900 PM
MDT...
AT 657 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE THUNDERSTORMS WHICH PRODUCED THE HEAVY RAINFALL HAVE MOVED
OFF TO THE NORTHEAST. RAINFALL AMOUNTS FROM THE RADAR WERE ESTIMATED
BETWEEN 2 AND 4 INCHES IN THE MID TO LATE AFTERNOON HOURS.
ADDITIONAL SHOWERS AND THUNDERSTORMS THROUGH 9 PM MAY PRODUCE UP TO
ONE HALF INCH OF RAINFALL OVER THE WARNED AREA. AS OF 7 PM...NO REPORTS
OF FLOODING HAVE BEEN RECEIVED FROM SOUTHEAST PLATTE...NORTH CENTRAL
LARAMIE AND SOUTHWEST GOSHEN COUNTIES.
RUNOFF FROM THE RECENT EXCESSIVE RAINFALL WILL CAUSE WATER LEVELS TO
REMAIN HIGH IN AREA SMALL STREAMS...DITCHES AND LOW LYING AREAS. THE
WATER LEVELS WILL SLOWLY DIMINISH THROUGH THE LATE EVENING SINCE THE
HEAVIER RAIN HAS ENDED.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...GUN BARREL...
HAWK SPRINGS AND THE MERIDEN REST AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 4180 10424 4129 10426 4142 10486 4148 10488
4180 10477
$$
MSW898
WGUS75 KCYS 070230
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
830 PM MDT WED JUN 6 2012
WYC015-021-031-070244-
/O.CAN.KCYS.FF.W.0004.000000T0000Z-120607T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GOSHEN WY-LARAMIE WY-PLATTE WY-
830 PM MDT WED JUN 6 2012
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHEASTERN
PLATTE...NORTH CENTRAL LARAMIE AND SOUTHWESTERN GOSHEN COUNTIES 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. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. AS OF 830 PM...
NO REPORTS OF FLOODING HAVE BEEN RECEIVED.
LAT...LON 4180 10424 4129 10426 4142 10486 4148 10488
4180 10477
$$
MSWThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 3:26 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 64 min |
| Jun 6, 3:39 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 51 min |
| Jun 6, 3:57 PM MDT | Special Weather Statement | CYS | Laramie | 48 min |
| Jun 6, 4:02 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 58 min |
| Jun 6, 4:27 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 35 min |
| Jun 6, 4:41 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 64 min |
| Jun 6, 4:52 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 53 min |
| Jun 6, 5:08 PM MDT | Special Weather Statement | CYS | Albany | 37 min |
| Jun 6, 5:13 PM MDT | Flash Flood Warning | CYS | Goshen | 3 hr |
| Jun 6, 5:33 PM MDT | Flash Flood Warning | CYS | Laramie | 3 hr |
| Jun 6, 5:43 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 62 min |
| Jun 6, 5:47 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 58 min |
Nearby
Flash Flood Warnings in Wyoming, 2012Every flash flood warning in 2012
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.