Alert archive / Wyoming / Flash Flood Warnings in 1991
Flash Flood Warning 12, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 2, 1991, 8:10 PM MDT for Laramie County, Wyoming. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jun 2, 1991, 8:10 PM MDT (02:10 UTC)
- Expired
- Jun 2, 1991, 11:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie County, WY
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 2.2 hours before the alert went out and 202 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
- 1410 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -45 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Jun 2, 3:44 PM MDT, 4 hours 26 minutes before
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</html>Special weather statement, Jun 2, 4:20 PM MDT, 3 hours 50 minutes before
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</html>Special weather statement, Jun 2, 4:58 PM MDT, 3 hours 12 minutes before
WYZ016-017-022345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 457 PM MDT SUN JUN 2 1991 ...THUNDERSTORMS CONTINUED TO INTENSIFY OVER SOUTHEAST WYOMING AT 455 PM... SCATTERED STORMS HAD DEVELOPED OVER MUCH OF SOUTHEAST WYOMING LATE THIS AFTERNOON. THE STORMS WERE MOST NUMEROUS IN LARAMIE COUNTY...ESPECIALLY IN EASTERN SECTIONS. THEY WERE MOVING NORTHWEST AT ABOUT 25 MILES AN HOUR. THE STRONGEST STORM WAS 25 TO 35 MILES EAST OF CHEYENNE...NEAR PINE BLUFFS. A LARGE THUNDERSTORM COMPLEX IN FAR NORTHERN COLORADO WAS ALSO APPROACHING LARAMIE COUNTY FROM THE SOUTH AT 450 PM. SO FAR... ONLY PEA SIZE HAIL AND BRIEF HEAVY RAIN HAVE BEEN REPORTED WITH THESE THUNDERSTORMS. PEOPLE IN SOUTHEAST WYOMING SHOULD BE ON THE LOOKOUT FOR THUNDERSTORMS PRODUCING HAIL...HEAVY RAIN...AND DEADLY LIGHTNING. A SEVERE THUNDER- STORM WATCH REMAINS IN EFFECT UNTIL 8 PM. ALSO...A FLASH FLOOD WATCH IS IN EFFECT UNTIL 2 AM. IFN THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE AND WAIT FOR THE STORMS TO PASS. THE HEAVY RAINS MAY CAUSE FLOODING OF STREAMS AND LOW LYING AREAS. JAD
Special weather statement, Jun 2, 6:17 PM MDT, 1 hour 53 minutes before
NEZ001-005-011-020130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 615 PM MDT SUN JUN 2 1991 ...THUNDERSTORMS OVER THE SOUTHWEST NEBRASKA PANHANDLE... AT 610 PM MDT...RADAR INDICATED THUNDERSTORMS SCATTERED ACROSS WESTERN KIMBALL...WESTERN BANNER AND SOUTHWEST SCOTTS BLUFF COUNTIES OF THE SOUTHERN AND CENTRAL NEBRASKA PANHANDLE. THE STRONGEST STORM WAS 35 MILES SOUTHWEST OF SCOTTSBLUFF NEBRASKA OVER WESTERN BANNER COUNTY OF THE CENTRAL NEBRASKA PANHANDLE. ALL THE STORM WERE MOVING TO THE NORTHWEST AT 25 MPH. BRIEF HEAVY RAIN...STRONG GUSTY WIND AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS AS THEY MOVE NORTHWEST ACROSS KIMBALL...BANNER AND SCOTTS BLUFF COUNTIES OF THE NEBRASKA PANHANDLE UNTIL 730 PM MDT. AT 6 PM MDT SKIES WERE MOSTLY CLOUDY TO CLOUDY ACROSS THE NEBRASKA PANHANDLE WITH TEMPERATURES RANGEING FROM 71 DEGREES AT SIDNEY TO 77 DEGREES AT CHADRON NEBRASKA. THE WIND WAS GENERALLY FROM THE SOUTH!EAST AT 10 TO 20 MPH WITH SOME GUSTS TO 30 MPH. KIRK
Special weather statement, Jun 2, 7:29 PM MDT, 41 minutes before
NEZ001-005-011-020230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 725 PM MDT SUN JUN 2 1991 ...THUNDERSTORMS OVER THE SOUTHWEST NEBRASKA PANHANDLE... AT 725 PM MDT...RADAR INDICATED THUNDERSTORMS SCATTERED ACROSS KIMBALL ...BANNER AND SOUTHWEST SCOTTS BLUFF COUNTIES OF THE SOUTHERN AND CENTRAL NEBRASKA PANHANDLE. THE STRONGEST STORM WAS 35 MILES SOUTH OF SCOTTSBLUFF NEBRASKA OVER THE BANNER/KIMBALL COUNTY LINE. ALL THE STORMS WERE MOVING TO THE NORTHWEST AT 25 MPH. AT 720 PM MDT KIMBALL COUNTY CIVIL DEFENSE REPORTED VERY HEAVY RAIN AND 1/4 TO 1/2 INCH HAIL ON INTERSTATE 80 NEAR BUSHNELL OR 45 MILES WEST OF SIDNEY NEBRASKA. BRIEF HEAVY RAIN...STRONG GUSTY WINDw AND HAIL ARE POSSIBLE WITH THESE STORMS AS THEY MOVE NORTHWEST ACROSS KIMBALL...BANNER AND SCOTTS BLUFF COUNTY OF THE NEBRASKA PANHANDLE UNTIL 830 PM MDT. KIRK
Special weather statement, Jun 2, 7:44 PM MDT, 26 minutes before
WYZ012-030215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 744 PM MDT SUN JUN 2 1991 ...A STRONG THUNDERSTORM WAS MOVING INTO THE LA GRANGE AREA OF SOUTHERN GOSHEN COUNTY AT 740 PM... RADAR SHOWED A STRONG THUNDERSTORM ABOUT 30 MILES SOUTH OF TORRINGTON MOVING RIGHT TOWARDS THE TOWN OF LA GRANGE. HAIL...GUSTY WINDS...AND VERY HEAVY RAIN ARE LIKELY WITH THIS STORM. PEOPLE IN SOUTHERN GOSHEN COUNTY...ESPECIALLY IN LA GRANGE...SHOULD GO TO A SAFE PLACE SUCH AS A BASEMENT AND WAIT FOR THE STORM TO PASS. JAD
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 12:52 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 38 min |
| Jun 3, 1:23 PM MDT | Tornado Warning | CYS | Sioux | 37 min |
| Jun 3, 1:56 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 34 min |
| Jun 3, 4:49 PM MDT | Tornado Warning | CYS | Banner | 26 min |
| Jun 3, 5:09 PM MDT | Severe Thunderstorm Warning | CYS | Sheridan | 36 min |
| Jun 3, 5:20 PM MDT | Tornado Warning | CYS | Banner | 25 min |
| Jun 2, 8:38 PM MDT | Flash Flood Warning | CYS | Goshen | 2 hr |
| Jun 2, 10:55 PM MDT | Flash Flood Warning | CYS | Goshen, Laramie | 2 hr |
Nearby
Flash Flood Warnings in Wyoming, 1991Every flash flood warning in 1991
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.