Alert archive / Utah / Flash Flood Warnings in 1998
Flash Flood Warning 10, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 24, 1998, 4:56 PM MDT for Sanpete County, Utah. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 24, 1998, 4:56 PM MDT (22:56 UTC)
- Expired
- Jul 24, 1998, 7:00 PM MDT
- In force
- 2 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Sanpete County, UT
The radar
The Salt Lake City radar (KMTX), 223 km from the middle of the area, began a volume at 22:56 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 10.9 hours before the alert went out and 159 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
- 187 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 1073 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 52 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 242300
FFWSLC
UTC039-250100-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
456 PM MDT FRI JUL 24 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SANPETE COUNTY IN UTAH
INCLUDING SPRING CITY
* UNTIL 700 PM MDT
* AT 446 PM MDT WEATHER SPOTTERS REPORTED A FLASH FLOOD IN THE
SPRING CITY AREA. FLOODING WAS ALSO REPORTED NEAR JERUSALEM.
HEAVY RAINS WILL CONTINUE IN THE AREA FOR AT LEAST ANOTHER HOUR.
ADDITIONAL AREAS OF FLOODING ARE POSSIBLE.
TO REPORT FLASH FLOODING HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN IN SALT LAKE
CITY. STAY TUNED TO LOCAL TELEVISION...RADIO...CABLE TV...OR NOAA
WEATHER RADIO FOR UPDATES.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, Jul 24, 11:00 AM MDT, 5 hours 56 minutes before
UTZ001>027-242300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1100 AM MDT FRI JUL 24 1998 ...THUNDERSTORMS WITH HEAVY RAIN LIKELY ACROSS UTAH TODAY.... SHOWERS AND THUNDERSTORMS ARE LIKELY ACROSS UTAH THIS AFTERNOON AND EVENING. WITH COPIOUS TROPICAL MOISTURE IN PLACE ACROSS THE STATE SOME OF THESE STORMS WILL PRODUCE VERY HEAVY RAIN. MUCH OF THE STATE HAS RECEIVED PRECIPITATION IN THE LAST SEVERAL DAYS. ADDITIONAL RAINFALL TODAY AND TONIGHT WILL INCREASE THE LIKELIHOOD OF FLASH FLOODING IN NORMALLY DRY WASHES...NARROW CANYONS...AND SMALL STREAMS. THE DANGER OF FLASH FLOODING IS HIGHER THAN USUAL TODAY...AND FLASH FLOOD WATCHES AND WARNINGS MAY BE NEEDED LATER TODAY. HIKERS AND CAMPERS SHOULD AVOID FLOOD PRONE AREAS. WITH NUMEROUS THUNDERSTORMS THIS AFTERNOON AND TONIGHT...THOSE OUTSIDE CELEBRATING THE 24TH SHOULD BE ESPECIALLY ALERT FOR LIGHTNING. LIGHTNING IS THE LEADING WEATHER RELATED KILLER IN UTAH.
Special weather statement, Jul 24, 11:00 AM MDT, 5 hours 56 minutes before
UTZ001>027-242300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1100 AM MDT FRI JUL 24 1998 ...THUNDERSTORMS WITH HEAVY RAIN LIKELY ACROSS UTAH TODAY.... SHOWERS AND THUNDERSTORMS ARE LIKELY ACROSS UTAH THIS AFTERNOON AND EVENING. WITH COPIOUS TROPICAL MOISTURE IN PLACE ACROSS THE STATE SOME OF THESE STORMS WILL PRODUCE VERY HEAVY RAIN. MUCH OF THE STATE HAS RECEIVED PRECIPITATION IN THE LAST SEVERAL DAYS. ADDITIONAL RAINFALL TODAY AND TONIGHT WILL INCREASE THE LIKELIHOOD OF FLASH FLOODING IN NORMALLY DRY WASHES...NARROW CANYONS...AND SMALL STREAMS. THE DANGER OF FLASH FLOODING IS HIGHER THAN USUAL TODAY...AND FLASH FLOOD WATCHES AND WARNINGS MAY BE NEEDED LATER TODAY. HIKERS AND CAMPERS SHOULD AVOID FLOOD PRONE AREAS. WITH NUMEROUS THUNDERSTORMS THIS AFTERNOON AND TONIGHT...THOSE OUTSIDE CELEBRATING THE 24TH SHOULD BE ESPECIALLY ALERT FOR LIGHTNING. LIGHTNING IS THE LEADING WEATHER RELATED KILLER IN UTAH.
Local storm report, Jul 24, 1:00 PM MDT, 3 hours 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
100 PM MDT FRI JUL 24 1998
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1120 AM NEWCASTLE UT TORNADO
07/23/98 IRON TORNADO BRIEFLY TOUCHED
DOWN OFF OF HIGHWAY 56
SOUTHEAST OF NEWCASTLE.
NO APPARENT DAMAGE.
0740 PM NATURAL BRIDGES NM UT FLASH FLOODING
07/23/98 SAN JUAN FLASH FLOOD IN SEVERAL
CANYONS AND SMALL STREAMS
WITHIN PARK BOUNDARIES.
ENDThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 7:37 PM MDT | Flash Flood Warning | SLC | San Juan | 68 min |
Nearby
Flash Flood Warnings in Utah, 1998Every flash flood warning in 1998
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; radar from the NEXRAD Level II archive.