Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 26, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 15, 1998, 4:36 PM MST for Mohave County, Arizona; Clark County, Nevada. 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
- Aug 15, 1998, 4:36 PM MST (23:36 UTC)
- Expired
- Aug 15, 1998, 6:35 PM MST
- In force
- 119 min
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
Counties Mohave County, AZ, Clark County, NV
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 12:00Z, 11.6 hours before the alert went out and 162 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
- 48 J/kg
- Mixed-layer CIN
- -376 J/kg
- Mixed-layer LCL
- 2134 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 21 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 KLAS 152336 FFWLAS AZC015-NVC003-160135- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 436 PM PDT (436 PM MST) SAT AUG 15 1998 * FLASH FLOOD WARNING FOR SOUTHEASTERN CLARK COUNTY IN EXTREME SOUTHERN NEVADA WEST CENTRAL MOHAVE COUNTY IN NORTHWESTERN ARIZONA * UNTIL 635 PM PDT (635 PM MST) * SOME LOCATIONS AFFECTED WILLOW BEACH COTTONWOOD COVE * AT 430 PM...THE NATIONAL PARK SERVICE REPORTED HEAVY RAIN AND WINDS GUSTING TO 48 MPH AT COTTONWOOD COVE ON LAKE MOHAVE. DOPPLER RADAR INDICATED HEAVY RAIN OCCURRING OVER THE AREA BETWEEN COTTONWOOD COVE AND WILLOW BEACH AND WILL LIKELY CAUSE FLOODING OF WASHES NEAR LAKE MOHAVE. BOATERS SHOU,LD REMAIN CLEAR OF BEACH AREAS WHERE WASHES DRAIN INTO THE LAKE.
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 15, 11:22 AM MST, 5 hours 14 minutes before
AZZ001>003-036-CAZ028-029-NVZ015-016-021-022-250500- BULLETIN...IMMEDIATE BROADCAST REQUESTED FLASH FLOOD WATCH...RESENT FOR NEVADA HIGHWAY PATROL ONLY... NATIONAL WEATHER SERVICE LAS VEGAS NV 1121 AM PDT (1121 AM MST) SAT AUG 15 1998 ...FLASH FLOOD WATCH UNTIL 1000 PM PDT THIS EVENING FOR PARTS OF SOUTHEAST NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA... A FLASH FLOOD WATCH HAS BEEN ISSUED UNTIL 1000 PM PDT THIS EVENING FOR MOHAVE...SOUTHERN LINCOLN...EASTERN CLARK...AND SOUTHEAST SAN BERNARDINO COUNTIES. THIS INCLUDES KINGMAN...LAUGHLIN-BULLHEAD CITY...NEEDLES...LAKE HAVASU CITY...WIKIEUP...GABBS...MESQUITE... OVERTON...MOAPA...LOGANDALE...ELGIN...CARP...COLORADO CITY...THE WESTERN END OF THE GRAND CANYON...AND THE ENTIRE LAKE MEAD NATIONAL RECREATION AREA. SCATTERED STRONG THUNDERSTORMS WITH LOCALIZED VERY HEAVY RAIN AND VERY STRONG WINDS ARE EXPECTED THIS AFTERNOON AND EVENING. RAINFALL COULD REACH 2.00 INCHES IN AS LITTLE AS ONE HOUR IN A FEW LOCATIONS. RAINFALL OF THIS INTENSITY WOULD LIKELY CAUSE FLASH FLOODING THROUGH WASHES...RUNOFF CHANNELS...AND OTHER LOW-LYING OR URBANIZED AREAS. WIND GUSTS FROM THIS STORMS COULD ALSO EXCEED 60 MPH. A FLASH FLOOD WATCH MEANS THERE IS THE POTENTIAL FOR FLASH FLOODING IN AND CLOSE TO THE WATCH AREA. BE READY TO TAKE QUICK ACTION IF FLASH FLOODING IS OBSERVED OR A WARNING ISSUED FOR YOUR AREA. DO NOT BECOME A VICTIM BY ATTEMPTING TO DRIVE OR WADE THROUGH RUNNING WATER YOU COULD BECOME STRANDED OR THE FORCE OF THE CURRENT COULD SWEEP YOU OR YOUR VEHICLE AWAY. KEEP LISTENING FOR UPDATES OR WARNINGS FROM THE NATIONAL WEATHER SERVICE. MCQUEEN
Local storm report, Aug 15, 1:20 PM MST, 3 hours 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NEVADA
120 PM PDT SAT AUG 15 1998
TIME(PDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0815 PM LAKE MEAD NV FLOODING
08/14/98 CLARK WASHES BETWEEN LAS VEGAS
BAY AND CALLVILLE BAY
FILLED BANK-TO-BANK WITH
UP TO 16 FEET OF WATER.
ROADS WASHED OUT AND MAJOR
DAMAGE TO CULVERTS. 30
CAMPERS IN BOXCAR WASH
STRANDED...RESCUED BY PARK
SERVICE. NO INJURIES
REPORTED.The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 5:23 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 52 min |
| Aug 14, 8:48 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 72 min |
| Aug 14, 7:38 PM MST | Severe Thunderstorm Warning | VEF | Clark | 62 min |
Nearby
Flash Flood Warnings in Arizona, 1998Flash Flood Warnings in Nevada, 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.