Alert archive / Utah / Flash Flood Warnings in 1991
Flash Flood Warning 13, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 6, 1991, 5:15 PM MDT for Carbon County, Utah. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 6, 1991, 5:15 PM MDT (23:15 UTC)
- Expired
- Aug 6, 1991, 7:15 PM MDT
- In force
- 2 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Carbon County, UT
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 11.3 hours before the alert went out and 168 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 062312 FFWSLC UTC007-070115- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 515 PM MDT TUE AUG 6 1991 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 715 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN EAST CENTRAL UTAH ...WESTERN CARBON COUNTY VERY HEAVY RAINFALL IN THE PRICE AREA AT 500 PM MDT IS MOVING TO THE NORTHEAST AROUND 10-15 MPH. THE AREA RECEIVING THIS HEAVY RAIN HAS ALREADY SEEN RAINFALL TODAY. STREAMS IN THE AREA COULD RISE RAPIDLY DURING THE NEXT COUPLES OF HOURS...EVEN THOUGH THUNDERSTORMS HAVE MOVED OUT OF THE AREA. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.
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, 12:47 PM MDT, 4 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
Special weather statement, Aug 6, 4:07 PM MDT, 1 hour 8 minutes before
UTZ001>003-006-009>011-070300-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
405 PM MDT TUE AUG 6 1991
...THUNDERSTORMS WITH STRONG MICROBURST WINDS OVER WESTERN UTAH THROUGH
THIS EVENING...
THUNDERSTORMS ARE DEVELOPING OVER WESTERN UTAH AGAIN THIS AFTERNOON
AHEAD OF AN UPPER LEVEL DISTURBANCE MOVING NORTHWARD FROM SOUTHERN
CALIFORNIA. THE AIRMASS OVER THIS PART OF THE STATE IS FAIRLY DRY AT
LOWER LEVELS. AS A RESULT...SOME OF THESE STORMS HAVE BEEN PRODUCING
STRONG MICROBURST WINDS. JUST BEFORE 4 PM A GUST TO 56 MPH WAS REPORTED
AT BYU IN PROVO.
ADDITIONAL MICROBURST WINDS OF 40 TO 50 MPH ARE POSSIBLE OVER THE
WESTERN PORTIONS OF THE STATE UNTIL THE STORMS DIMINISH LATER TONIGHT.
LIGHTWEIGHT OR HIGH PROFILE VEHICLES SHOULD BE PREPARED FOR SUDDEN WIND
GUSTS THAT COULD MAKE DRIVING HAZARDOUS AS WELL AS REDUCED VISIBILITIES
IN BLOWING DUST. ON LAKES...STRONG GUSTY WINDS CAN MAKE SMALL BOATS
DIFFICULT TO HANDLE.
LIGHTNING WILL ALSO ACCOMPANY THESE STORMS AND CAN BE DEADLY. SEEK
PROPER SHELTER INDOORS OR IN A CAR IF A THUNDERSTORM APPROACHES.
PJW/CCS...2206ZThe 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, 3:15 PM MDT | Flash Flood Warning | SLC | Carbon, Emery, Sanpete | 60 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 |
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.