Alert archive / Wyoming / Flash Flood Warnings in 1997
Flash Flood Warning 8, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jul 29, 1997, 9:25 PM MDT for Goshen County, Wyoming. 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
- Jul 29, 1997, 9:25 PM MDT (03:25 UTC)
- Expired
- Jul 30, 1997, 12:00 AM MDT
- In force
- 3 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Goshen County, WY
The radar
The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 03:29 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
Rapid City, SD (KUNR), launched 00:00Z, 3.4 hours before the alert went out and 251 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
- 496 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 300325 FFWCYS WYC015-300555- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 925 PM MDT TUE JUL 29 1997 * FLASH FLOOD WARNING FOR NORTHWESTERN GOSHEN COUNTY IN SOUTHEASTERN WYOMING * UNTIL MIDNIGHT MDT * THE WARNING IS MAINLY IN RURAL AREAS IN THE COTTONWOOD CREEK DRAINAGE. * CAUSE AND EFFECT RADAR HAS INDICATED ABOUT 2 TO 4 INCHES OF RAINFALL IN THIS AREA SINCE 730 PM. THE GOSHEN COUNTY SHERIFF/S OFFICE RECEIVED A REPORT FROM A RANCHER OF 2 TO 4 FEET OF WATER FLOWING OVER SOME COUNTY ROADS NORTH OF FT. LARAMIE. THIS AREA IS ABOUT 25 TO 30 MILES NORTHWEST OF TORRINGTON. THE STORM THAT CAUSED THE FLASH FLOODING WAS PICKING UP SPEED AS IT MOVED ACROSS NORTH CENTRAL GOSHEN COUNTY AT 920 PM. IT WAS LOCATED ABOUT 20 TO 25 MILES NORTHWEST OF TORRINGTON AND MOVING SOUTHEAST AROUND 15 MPH...PUTTING OUT ABOUT 1 TO 1.5 INCHES OF RAIN PER HOUR. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN ITd IS HARDER TO RECOGNIZE THE DANGERS OF FLASH FLOODING. WCJIN-WYSE JAD
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 29, 6:17 PM MDT, 3 hours 8 minutes before
WYZ059-060-300115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 617 PM MDT TUE JUL 29 1997 ...A STRONG THUNDERSTORM WITH HEAVY RAIN WAS MOVING ACROSS SOUTHEAST CONVERSE COUNTY AT 610 PM... THE STORM WAS LOCATED ABOUT 10 MILES EAST SOUTHEAST OF DOUGLAS AND WAS DRIFTING EAST AROUND 10 TO 15 MPH. IT HAS PRODUCED HEAVY RAIN IN AND JUST SOUTH OF DOUGLAS WITH LOCALIZED FLOODING OF CREEKS ALONG ESTERBROOK ROAD. THIS STORM ALSO STILL CONTAINED SOME ROTATION IN IT...AND MAY BE ABLE TO PRODUCE ANOTHER BRIEF FUNNEL CLOUD. PEOPLE IN FAR SOUTHEAST CONVERSE AND FAR SOUTHWEST NIOBRARA COUNTIES SHOULD BE ON THE LOOKOUT FOR THIS STORM. ON ITS PRESENT TRACK IT WILL CROSS AN AREA ALONG THE NIOBRARA-CONVERSE COUNTY LINE JUST SOUTH OF HIGHWAY 18/20 THAT ALREADY RECEIVED HEAVY RAIN EARLIER TODAY. LOCAL FLOODING OF STREAM AND DITCHES COULD EASILY OCCUR. WCJIN-WYNE JAD
Nearby
Flash Flood Warnings in Wyoming, 1997Every flash flood warning in 1997
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.