Alert archive / Wyoming / Flash Flood Warnings in 1991
Flash Flood Warning 13, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 2, 1991, 8:38 PM MDT for Goshen County, Wyoming. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jun 2, 1991, 8:38 PM MDT (02:38 UTC)
- Expired
- Jun 2, 1991, 11:00 PM MDT
- In force
- 2 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Goshen County, WY
The nearest sounding before it
Rapid City, SD (KRAP), launched 00:00Z, 2.6 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
- 321 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 965 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 030239 FFWCYS WYC015-030500- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 838 PM MDT SUN JUN 2 1991 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1100 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST WYOMING ...SOUTHERN GOSHEN COUNTY THIS WARNING INCLUDES THE TOWN OF LA GRANGE...SOME 30 MILES SOUTH OF TORRINGTON. DRAINAGES INCLUDE HORSE CREEK AND BEAR CREEK. AT 830 PM BEAR CREEK AND HORSE CREEK WERE REPORTED OUT OF THEIR BANKS. THESE STREAMS ARE IN FAR SOUTHERN GOSHEN COUNTY AND EXTREME NORTHEAST LARAMIE COUNTY. THEY CONVERGE AT THE TOWN OF LA GRANGE. A FLASH FLOOD WARNING ALSO IS IN EFFECT FOR THE EASTERN THIRD OF LARAMIE COUNTY UNTIL 11 PM. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERSc. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. 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, Jun 2, 4:58 PM MDT, 3 hours 40 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, 2 hours 21 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, 1 hour 9 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, 54 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
Special weather statement, Jun 2, 8:16 PM MDT, 22 minutes before
WYZ016-017-030300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 815 PM MDT SUN JUN 2 1991 ...THE THUNDERSTORM WATCH FOR THE SOUTHEAST CORNER OF WYOMING HAS BEEN ALLOWED TO EXPIRE... AT 805 PM MDT...NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORMS IN SOUTHEAST WYOMING WERE WEAKENING. THERFORE...THE SEVERE THUNDERSTORM WATCH FOR THE SOUTHEAST CORNER OF WYOMING HAS BEEN ALLOWED TO EXPIRE. LIGHT TO MODERATE RAINFALL WILL CONTINUE IN SOUTHEAST WYOMING THROUGH MIDNIGHT. WITH THE GROUND ALREADY SATURATED...FLOODING OF ROADWAYS AND LOW LYING AREAS CAN BE EXPECTED THROUGH THE EVENING. PEOPLE IN SOUTHEAST WYOMING ARE REMINDED THAT A FLASH FLOOD WATCH RELMAINS IN EFFECT UNTIL 200 AM MDT MONDAY MORNING. IF YOU ENCOUNTER RAPIDLY RISING WATERS..CLIMB TO HIGHER GROUND IMMEDIATELY. DO NOT ATTEMPT TO CROSS FAST MOVING WATERS OR DRIVE THROUGH WATER OF UNKNOWN DEPTH. VIRGILLITO
Special weather statement, Jun 2, 8:20 PM MDT, 18 minutes before
WYZ016-017-030300- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE CHEYENNE WY 819 PM MDT SUN JUN 2 1991 ...THE SEVERE THUNDERSTORM WATCH FOR THE SOUTHEAST CORNER OF WYOMING HAS BEEN ALLOWED TO EXPIRE... AT 805 PM MDT...NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORMS IN SOUTHEAST WYOMING WERE WEAKENING. THERFORE...THE SEVERE THUNDERSTORM WATCH FOR THE SOUTHEAST CORNER OF WYOMING HAS BEEN ALLOWED TO EXPIRE. LIGHT TO MODERATE RAINFALL WILL CONTINUE IN SOUTHEAST WYOMING THROUGH MIDNIGHT. WITH THE GROUND ALREADY SATURATED...FLOODING OF ROADWAYS AND LOW LYING AREAS CAN BE EXPECTED THROUGH THE EVENING. PEOPLE IN SOUTHEAST WYOMING ARE REMINDED THAT A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 200 AM MDT MONDAY MORNING. IF YOU ENCOUNTER RAPIDLY RISING WATERS..CLIMB TO HIGHER GROUND IMMEDIATELY. DO NOT ATTEMPT TO CROSS FAST MOVING WATERS OR DRIVE THROUGH WATER OF UNKNOWN DEPTH. CORRECTED FORV OMMISION OF SEVERE IN HIGHLIGHT SENTENCE VIRGILLITO
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 8:10 PM MDT | Flash Flood Warning | CYS | Laramie | 3 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.