Alert archive / Wyoming / Flash Flood Warnings in 2007
Flash Flood Warning 2, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 21, 2007, 5:13 PM MDT for Goshen County, Wyoming; Banner County, Nebraska. It took effect at Jun 21, 2007, 5:18 PM MDT. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 21, 2007, 5:13 PM MDT (23:13 UTC)
- In effect from
- Jun 21, 2007, 5:18 PM MDT
- Expired
- Jun 21, 2007, 8:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Banner County, NE, Goshen County, WY
The radar
The Cheyenne radar (KCYS), 98 km from the middle of the area, began a volume at 23:16 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, 11.2 hours before the alert went out and 227 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
- 16 J/kg
- Mixed-layer CIN
- -340 J/kg
- Mixed-layer LCL
- 3742 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS55 KCYS 212318
FFWCYS
NEC007-WYC015-220215-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
513 PM MDT THU JUN 21 2007
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...
SOUTHEASTERN GOSHEN COUNTY IN SOUTHEAST WYOMING...
* UNTIL 815 PM MDT
* AT 512 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
EXCESSIVE RAINFALL IN EXCESS OF 2 INCHES WITH THE POTENTIAL TO
CAUSE FLASH FLOODING FROM A SERIES OF THUNDERSTORMS WHICH OCCURRED
6 MILES WEST OF BULL CANYON...OR ABOUT 23 MILES SOUTHWEST OF
SCOTTSBLUFF.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF
STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES...AS WELL AS LOW LYING
AREAS ALONG THE BANKS OF STREAMS.
REPORT FLOODING TO THE NATIONAL WEATHER SERVICE OFFICE IN CHEYENNE AT
1-800-269-6220.
LAT...LON 4159 10417 4158 10404 4156 10394 4170 10382
4169 10404
$$
CARPENTER1 follow-up statement
000
WGUS75 KCYS 220050
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
646 PM MDT THU JUN 21 2007
NEC007-WYC015-220056-
BANNER NE-GOSHEN WY-
646 PM MDT THU JUN 21 2007
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN GOSHEN
AND NORTHWESTERN BANNER COUNTIES...
SEVERAL SPOTTERS HAVE REPORTED THAT NO FLOODING IS OCCURRING ACROSS
SOUTHEASTERN GOSHEN AND NORTHWESTERN BANNER COUNTIES ASSOCIATED WITH
THE PERIOD OF HEAVY RAINFALL EARLIER THIS AFTERNOON. THEREFORE THE
FLASH FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 4159 10417 4158 10404 4156 10394 4170 10382
4169 10404
$$The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 4:06 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 24 min |
| Jun 21, 4:50 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 28 min |
| Jun 21, 4:46 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 44 min |
| Jun 21, 5:26 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 29 min |
| Jun 21, 5:44 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 30 min |
Nearby
Flash Flood Warnings in Wyoming, 2007Flash Flood Warnings in Nebraska, 2007Every flash flood warning in 2007
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.