Alert archive / Utah / Flash Flood Warnings in 1991
Flash Flood Warning 9, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 6, 1991, 3:15 PM MDT for Carbon County, Emery County, Sanpete County, Utah. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Aug 6, 1991, 3:15 PM MDT (21:15 UTC)
- Expired
- Aug 6, 1991, 4:15 PM MDT
- In force
- 60 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
Counties Carbon County, UT, Emery County, UT, Sanpete County, UT
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 9.3 hours before the alert went out and 179 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
- 330 J/kg
- Mixed-layer CIN
- -224 J/kg
- Mixed-layer LCL
- 2437 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 134 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 KSLC 062117 FFWSLC UTC039-007-015-061615- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 315 PM MDT TUE AUG 6 1991 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 415 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL UTAH ...EASTERN SAN PETE COUNTY IN EAST CENTRAL UTAH ...WESTERN CARBON COUNTY...NORTHWESTERN EMERY COUNTY LOCAL LAW ENFORCEMENT AND NATIONAL WEATHER SERVICE SPOTTERS HAVE REPORTED HEAVY RAINFALL OF OVER ONE INCH FALLING IN THE WARNING AREA WITHIN THE LAST HOUR ALONG WITH FLASH FLOODING OF WASHES AND SMALL STREAMS. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MnOVE UP TO HIGHER GROUND.
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, Aug 6, 9:25 AM MDT, 5 hours 50 minutes before
UTZ008-011>013-061900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 930 AM MDT TUE AUG 6 1991 ...THUNDERSTORMS OVER THE SOUTHEAST CORNER OF THE STATE... THUNDERSTORMS ARE DEVELOPING OVER MUCH OF SOUTHEAST UTAH THIS MORNING. BLANDING REPORTED 0.35 INCHES IN ABOUT HALF AN HOUR. OTHER AREAS MAY HAVE RECEIVED GREATER AMOUNTS. SEVERAL SPOTTERS IN SOUTHERN SAN JUAN COUNTY REPORTED A VERY DARK THUNDERSTORM TO THE SOUTH...AND SATELLITE PICTURES SUGGEST THAT THE THUNDERSTORM WILL PASS ACROSS THE SOUTHEAST CORNER OF UTAH DURING THE NEXT SEVERAL HOURS. BRIEF HEAVY RAINFALL...FREQUENT LIGHTNING AND SMALL HAIL ARE POSSIBLE WITH THIS STORM. DUE TO THE RAINFALL OVER THE PAST FEW HOURS MANY OF THE DRY WASHES MAY BEGIN TO RUN. DO NOT ATTEMPT TO CROSS ROADS IF WATER HAS COVERED THE ROADWAY. REMEMBER ALSO THAT LIGHTNING IS A PROVEN KILLER. IF YOU ARE OUTDOORS WHEN THREATENING WEATHER APPROACHES SEEuK SHELTER INDOORS OR IN A VEHICLE. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL OFFICIALS FOR FURTHER STATEMENTS AND ADVISORIES. MSL...1522Z
Special weather statement, Aug 6, 12:47 PM MDT, 2 hours 28 minutes before
UTZALL-062300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1245 PM MDT TUE AUG 6 1991 ...FLASH FLOOD WATCH UNTIL 630 TONIGHT FOR SOUTHEASTERN UTAH... ...THUNDERSTORMS CONTINUE OVER THE SOUTHERN HALF OF THE STATE... THUNDERSTORMS ARE BEGINNING TO DEVELOP OVER SOUTHWESTERN UTAH AND ARE SPREADING INTO THE CENTRAL PART OF THE STATE. MEANWHILE STRONGER THUNDERSTORMS THAT WERE OVER THE SOUTHEASTERN CORNER OF UTAH THIS MORNING ARE WEAKENING AND MOVING INTO COLORADO. HOWEVER...MORE THUNDERSTORMS ARE DEVELOPING IN NORTHEASTERN ARIZONA. AS AN UPPER LEVEL DISTURBANCE MOVES ACROSS THE STATE FROM SOUTH TO NORTH TODAY THE THUNDERSTORMS ARE EXPECTED TO CONTINUE TO DEVELOP AND SPREAD NORTHWARD INTO NORTHERN UTAH. SO FAR TODAY THUNDERSTORMS IN SOUTHEASTERN UTAH HAVE PRODUCED BRIEF HEAVY RAINFALL AND FREQUENT LIGHTNING. A FEW REPORTS OF RAINFALL AS OF NOON INCLUDE 0.49 INCHES AT BLANDING...0.17 INCHES AT GREEN RIVER...AND 0.25 AT HOLE IN THE ROCK. THE MAIN THUNDERSTORM THREAT TODAY WILL BE GUSTY WINDS AND FREQUENT LIGHTNING HOWEVER BRIEF HEAVY RAINFALL HAS CAUSED MANY DRY WASHES TO RUN. DO NOT ATTEMPT TO DRIVE THROUGH ANY AREAS WHERE WATER IS COVERING ROADWAYS. REMEMBER ALSO THAT LIGHTNING IS A PROVEN KILLER. IF YOU ARE OUTDOORS WHEN THREATENING WEATHER APPROACHES SEEK SHELTER INDOORS OR IN A VEHICLE. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL OFFICIALS FOR FURTHER STATEMENTS AND ADVISORIES. SJK/MSL...1845Z
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 6:47 PM MDT | Flash Flood Warning | SLC | Emery | 58 min |
| Aug 6, 3:37 PM MDT | Flash Flood Warning | SLC | Carbon, Emery, Sanpete | 68 min |
| Aug 6, 3:37 PM MDT | Flash Flood Warning | SLC | Duchesne | 68 min |
| Aug 6, 5:00 PM MDT | Flash Flood Warning | SLC | Duchesne, Uintah | 60 min |
| Aug 6, 5:15 PM MDT | Flash Flood Warning | SLC | Carbon | 2 hr |
Nearby
Flash Flood Warnings in Utah, 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.