Alert archive / Utah / Flash Flood Warnings in 1997
Flash Flood Warning 56, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 15, 1997, 12:11 AM MDT for Washington County, Utah. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 15, 1997, 12:11 AM MDT (06:11 UTC)
- Expired
- Sep 15, 1997, 2:10 AM MDT
- In force
- 119 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Washington County, UT
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 00:00Z, 6.2 hours before the alert went out and 234 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
- 9 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 2945 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 74 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 150614 FFWSLC UTC053-150810- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1211 AM MDT MON SEP 15 1997 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 210 AM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWESTERN UTAH ...NORTHEASTERN WASHINGTON COUNTY AT MIDNIGHT...RADAR ESTIMATED FROM .75 TO 1.5 INCHES OF RAIN HAS FALLEN IN AN HOURS TIME OVER THE UPPER REACHES OF THE VIRGIN RIVER AND OVER THE WESTERN PORTIONS OF ZION NATIONAL PARK. THIS MUCH RAINFALL ON ALREADY SATURATED GROUND IS LIKELY TO CAUSE FLASH FLOODING IN PORTIONS OF THE PARK AND SIGNIFICANT RISES ON THE VIRGIN RIVER WITHIN THE NEXT 1-2 HOURS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. FOLLOW THE INSTRUCTIONS OF LOCAL AUTHORITIES. MANY LIVES HAVE BEEN LOST BECAUSE PEOPLE HAVE NOT HEEDED THE WARNINGS OF POLICE OFFICERS AND PARK RANGERS. MOTORISTS SHOULD BE ESPECIALLY CAREFUL AT NIGHT AND AVOID DRIVING INTO MOVING WATER OF UNKNOWN DEPTH...LOW WATER CROSSINGS AND FLOOD PRONE AREAS.
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, Sep 14, 7:00 PM MDT, 5 hours 11 minutes before
IDZ024-025-UTZ001>027-WYZ021-151200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 PM MDT SUN SEP 14 1997 ...COLD FRONT AND TROPICAL MOISTURE TO BRING ACTIVE WEATHER TONIGHT AND MONDAY... A COLD FRONT CONTINUES ON TRACK TO MOVE INTO UTAH MONDAY. IN ADDITION...TROPICAL MOISTURE IS SPREADING INTO THE STATE FROM THE SOUTH AHEAD OF THE FRONT. THIS COMBINATION WILL PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS ALONG WITH LOCALLY HEAVY RAINFALL. SHOWERS AND THUNDERSTORMS HAVE BEEN DEVELOPING IN THE TROPICAL AIRMASS AND WILL CONTINUE TO DEVELOP TONIGHT. THIS MOIST AIRMASS HAS SPREAD OVER SOUTHERN AND EASTERN UTAH AS OF SUNDAY EVENING AND WILL OVERSPREAD THE ENTIRE STATE BY SUNRISE MONDAY. LOCALLY HEAVY RAINS HAVE OCCURRED OVER PORTIONS OF SOUTHWEST UTAH AND WILL ACCOMPANY THE MOIST AIRMASS AS IT SPREADS NORTHWARD INTO THE STATE. THESE RAINS MAY PRODUCE LOCAL FLOODING OF ROADS AND WASHES. THERE IS THE POTENTIAL THAT HEAVY RAINS MAY BECOME WIDESPREAD DURING THE DAY MONDAY AS THIS MOIST AIRMASS BEGINS TO INTERACT WITH THE COLD FRONT. STAY TUNED TO LOCAL RADIO...TV...CABLE TV OR NOAA WEATHER RADIO FOR UPDATES ON THIS STORM. PJW...0103Z
Special weather statement, Sep 14, 7:04 PM MDT, 5 hours 7 minutes before
IDZ024-025-UTZ001>027-WYZ021-151200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 PM MDT SUN SEP 14 1997 ...COLD FRONT AND TROPICAL MOISTURE TO BRING ACTIVE WEATHER TONIGHT AND MONDAY... A COLD FRONT CONTINUES ON TRACK TO MOVE INTO UTAH MONDAY. IN ADDITION...TROPICAL MOISTURE IS SPREADING INTO THE STATE FROM THE SOUTH AHEAD OF THE FRONT. THIS COMBINATION WILL PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS ALONG WITH LOCALLY HEAVY RAINFALL. SHOWERS AND THUNDERSTORMS HAVE BEEN DEVELOPING IN THE TROPICAL AIRMASS AND WILL CONTINUE TO DEVELOP TONIGHT. THIS MOIST AIRMASS HAS SPREAD OVER SOUTHERN AND EASTERN UTAH AS OF SUNDAY EVENING AND WILL OVERSPREAD THE ENTIRE STATE BY SUNRISE MONDAY. LOCALLY HEAVY RAINS HAVE OCCURRED OVER PORTIONS OF SOUTHWEST UTAH AND WILL ACCOMPANY THE MOIST AIRMASS AS IT SPREADS NORTHWARD INTO THE STATE. THESE RAINS MAY PRODUCE LOCAL FLOODING OF ROADS AND WASHES. THERE IS THE POTENTIAL THAT HEAVY RAINS MAY BECOME WIDESPREAD DURING THE DAY MONDAY AS THIS MOIST AIRMASS BEGINS TO INTERACT WITH THE COLD FRONT. STAY TUNED TO LOCAL RADIO...TV...CABLE TV OR NOAA WEATHER RADIO FOR UPDATES ON THIS STORM. PJW...0103Z
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 6:42 PM MDT | Flash Flood Warning | SLC | Iron, Kane, Washington | 113 min |
Nearby
Flash Flood Warnings in Utah, 1997Every flash flood warning in 1997
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.