Alert archive / Utah / Flash Flood Warnings in 1993
Flash Flood Warning 6, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 29, 1993, 7:00 PM MDT for San Juan County, Utah. It was in force for 90 min.
The area
The counties it named.
The facts
- Issued
- Aug 29, 1993, 7:00 PM MDT (01:00 UTC)
- Expired
- Aug 29, 1993, 8:30 PM MDT
- In force
- 90 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County San Juan County, UT
The nearest sounding before it
Grand Junction, CO (KGJT), launched 00:00Z, 1.0 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
- 2709 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- -46 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 300104 FFWSLC UTC037-300230- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 PM MDT SUN AUG 29 1993 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 830 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST UTAH ...SAN JUAN COUNTY AT 655 PM MDT...STRONG THUNDERSTORMS PRODUCING HEAVY RAIN WERE SCATTERED ACROSS ALL OF SAN JUAN COUNTY. A SPOTTER IN BLUFF REPORTS THAT MANY WASHES BETWEEN BLANDING AND THE UTAH-ARIZONA BORDER ARE FULL. MORE STORMS WILL BE MOVING ACROSS SAN JUAN COUNTY BY 830 PM WHICH WILL INCREASE THE CHANCES OF FLOODING. THE THUNDERSTORMS WERE MOVING EAST SOUTHEAST AT 15 MPH. TOWNS THAT MAY EXPERIENCE FLOODING INCLUDE BLUFF...BLANDING...MEXICAN HAT AS WELL AS NATURAL BRIDGES NATIONAL MONUMENT. 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 MOVE 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 29, 2:45 PM MDT, 4 hours 15 minutes before
UTZ006>009-011>013-300400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 245 PM MDT SUN AUG 29 1993 ...STRONG THUNDERSTORMS OVER SOUTHERN UTAH... THUNDERSTORMS ARE DEVELOPING OVER SOUTHERN UTAH THIS AFTERNOON. A PILOT REPORTED A STRONG STORM EAST OF CEDAR CITY AT 2 PM WHICH HAD DEVELOPED TO HIGH LEVELS OF THE ATMOSPHERE. THE LOWER LEVELS OF THE ATMOSPHERE ARE BECOMING MORE MOIST IN THE SOUTH AND CONDITIONS ARE BECOMING MORE UNSTABLE. BRIEF HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS WILL ACCOMPANY SOME OF THE THUNDERSTORMS THIS AFTERNOON AND EVENING. THOSE PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON AND EVENING SUCH AS HIKING OR CAMPING SHOULD PLAN TO ESTABLISH CAMPSITES ON HIGH GROUND. STREAMS...CREEKS...OR DRY WASHES CAN FILL WITH WATER RAPIDLY. REMEMBER LIGHTNING IS A PROVEN KILLER. DON'T BE HUMAN LIGHTNING ROD. FURTHER STATEMENTS WILL BE ISSUED AS NEEDED. BAKER...2045Z
Special weather statement, Aug 29, 2:47 PM MDT, 4 hours 13 minutes before
UTZ006>009-011>013-300400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 245 PM MDT SUN AUG 29 1993 ...STRONG THUNDERSTORMS OVER SOUTHERN UTAH... THUNDERSTORMS ARE DEVELOPING OVER SOUTHERN UTAH THIS AFTERNOON. A PILOT REPORTED A STRONG STORM EAST OF CEDAR CITY AT 2 PM WHICH HAD DEVELOPED TO HIGH LEVELS OF THE ATMOSPHERE. THE LOWER LEVELS OF THE ATMOSPHERE ARE BECOMING MORE MOIST IN THE SOUTH AND CONDITIONS ARE BECOMING MORE UNSTABLE. BRIEF HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS WILL ACCOMPANY SOME OF THE THUNDERSTORMS THIS AFTERNOON AND EVENING. THOSE PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON AND EVENING SUCH AS HIKING OR CAMPING SHOULD PLAN TO ESTABLISH (CAMPSITES ON HIGH GROUND. STREAMS...CREEKS...OR DRY WASHES CAN FILL WITH WATER RAPIDLY. REMEMBER LIGHTNING IS A PROVEN KILLER. DON'T BE HUMAN LIGHTNING ROD. FURTHER STATEMENTS WILL BE ISSUED AS NEEDED. BAKER...2045Z
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 8:51 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 39 min |
Nearby
Flash Flood Warnings in Utah, 1993Every flash flood warning in 1993
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.