Alert archive / Utah / Flash Flood Warnings in 1998
Flash Flood Warning 9, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 23, 1998, 7:37 PM MDT for San Juan County, Utah. It was in force for 68 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
- Jul 23, 1998, 7:37 PM MDT (01:37 UTC)
- Expired
- Jul 23, 1998, 8:45 PM MDT
- In force
- 68 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County San Juan County, UT
The radar
The Grand Junction radar (KGJX), 212 km from the middle of the area, began a volume at 01:39 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
Grand Junction, CO (KGJT), launched 00:00Z, 1.6 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
- 4 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 2692 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -25 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 240145
FFWSLC
UTC037-240245-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
737 PM MDT THU JUL 23 1998
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL SAN JUAN COUNTY IN UTAH
* UNTIL 845 PM MDT
* AT 735 PM MDT RANGERS AT NATURAL BRIDGES NATIONAL MONUMENT
REPORTED A FLASH FLOOD OCCURING AT THE MONUMENT
THE RAIN HAD ENDED AT THE MONUMENT AT 735 PM BUT EXCESSIVE RUNOFF
FROM THE STORM WILL KEEP THE WASHES RUNNING FULL FOR ABOUT ANOTHER
HOUR.
HEAVY RAINS TO THE SOUTH OF THIS AREA MAY ALSO CAUSE ADDITIONAL
FLASH FLOODING OVER THE NEXT HOUR OR SO.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.
TO REPORT FLASH FLOODING HAVE THE NEAREST FLAW 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.
LAT...LON 3745 11025 3726 10993 3759 10960 3777 11005What 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 23, 3:00 PM MDT, 4 hours 37 minutes before
UTZ001>004-240830-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
300 PM MDT THU JUL 23 1998
...A WET 24TH LIKELY...
TROPICAL MOISTURE ENCOMPASSES THE BEEHIVE STATE THIS AFTERNOON AND
WILL REMAIN THROUGH THE 24TH. THE MAJORITY OF THE SHOWER AND
THUNDERSTORM ACTIVITY WILL BE IN THE NORTH ON FRIDAY.
AN IMPULSE IN EASTERN NEVADA WILL ROTATE IN NORTHERN UTAH TONIGHT AND
FRIDAY THAT WILL TEND TO ENHANCE THE SHOWER ACTIVITY.
CLOUDY SKIES AND THE POSSIBILITY OF SHOWERS IS ON TAP FOR THE 24TH
PARADES IN BOTH SALT LAKE AND OGDEN. TEMPERATURES WILL BE IN THE 70S
AT THE START OF THE PARADES AND BY NOON NEAR 80.
SHOWERS AND THUNDERSTORMS WILL PREVAIL INTO THE^ AFTERNOON AND
EVENING. THIS COULD BE A CONCERN FOR THE SCHEDULED FIREWORKS
DISPLAYS.
THOSE OUTSIDE CELEBRATING THE 24TH SHOULD BE ALERT LIGHTNING.
LIGHTNING IS A PROVEN KILLER.
WJA...2100ZSpecial weather statement, Jul 23, 3:00 PM MDT, 4 hours 37 minutes before
UTZ001>004-240830-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
300 PM MDT THU JUL 23 1998
...A WET 24TH LIKELY...
TROPICAL MOISTURE ENCOMPASSES THE BEEHIVE STATE THIS AFTERNOON AND
WILL REMAIN THROUGH THE 24TH. THE MAJORITY OF THE SHOWER AND
THUNDERSTORM ACTIVITY WILL BE IN THE NORTH ON FRIDAY.
AN IMPULSE IN EASTERN NEVADA WILL ROTATE IN NORTHERN UTAH TONIGHT AND
FRIDAY THAT WILL TEND TO ENHANCE THE SHOWER ACTIVITY.
CLOUDY SKIES AND THE POSSIBILITY OF SHOWERS IS ON TAP FOR THE 24TH
PARADES IN BOTH SALT LAKE AND OGDEN. TEMPERATURES WILL BE IN THE 70S
AT THE START OF THE PARADES AND BY NOON NEAR 80.
SHOWERS AND THUNDERSTORMS WILL PREVAIL INTO THE^ AFTERNOON AND
EVENING. THIS COULD BE A CONCERN FOR THE SCHEDULED FIREWORKS
DISPLAYS.
THOSE OUTSIDE CELEBRATING THE 24TH SHOULD BE ALERT LIGHTNING.
LIGHTNING IS A PROVEN KILLER.
WJA...2100ZThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 4:56 PM MDT | Flash Flood Warning | SLC | Sanpete | 2 hr |
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.