Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 20, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 24, 1998, 2:52 AM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 118 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 24, 1998, 2:52 AM MST (09:52 UTC)
- Expired
- Jul 24, 1998, 4:50 AM MST
- In force
- 118 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 00:00Z, 9.9 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
- 245 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1915 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 5 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 240953 FFWLAS AZC015-NVC003-241150- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 252 AM PDT (252 AM MST) FRI JUL 24 1998 * FLASH FLOOD WARNING FOR EXTREME EASTERN CLARK COUNTY IN SOUTHERN NEVADA CENTRAL AND NORTHERN MOHAVE COUNTY IN NORTHWESTERN ARIZONA * UNTIL 450 AM PDT (450 AM MST) * SOME LOCATIONS AFFECTED SOUTH COVE/MEADVIEW AND PEARCE FERRY IN THE LAKE MEAD NATIONAL RECREATION AREA WESTERN PORTION OF THE GRAND CANYON NATIONAL PARK HUALAPAI INDIAN RESERVATION DOLAN SPRINGS AT 245 AM PDT...SATELLITE IMAGERY INDICATED THAT THUNDERSTORMS OVER EXTREME EASTERN CLARK COUNTY AND NORTHERN AND CENTRAL MOHAVE COUNTY ARIZONA HAVE RE-INTENSIFIED WITH FLASH FLOODING LIKELY TO OCCUR. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. 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. IT IS VERY DIFFICULT AT NIGHT TO TELL HOW MUCH WATER IS ON ROADS. MOTORISTS SHOULD NOT DRIVE THROUGH WATER OF UNKNOWN DEPTH. CORDERO
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.
NWS Las Vegas, NV wrote its last area forecast discussion before this flash flood warning went out at Jul 24, 2:35 AM MST, 17 minutes earlier.
Area forecast discussion, Jul 24, 2:35 AM MST, 17 minutes before
MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 235 AM PDT FRI JUL 24 1998 SYNOPSIS...MONSOONAL MOISTURE THAT HAS BEEN ACROSS THE MOJAVE DESERT AND SOUTHERN GREAT BASIN WILL GRADUALLY DIMINISH THROUGH SATURDAY. THIS WILL RESULT IN A DECREASING THREAT OF THUNDERSTORMS...ESPECIALLY ACROSS THE LOWER DESERT REGIONS. DISCUSSION...WEAK UPPER LOW CIRCULATION SEEN ON WATER VAPOR SHOTS OVER SRN CA INTO NRN BAJA WILL BE KEY PLAYER TODAY. DRIER AIR INDICATED WITH THIS AND WAS HANDLED BEST BY NGM. ETA SHOWS NO DRYING THRU 48 HRS AND WAS DISCARDED. THIS BOUNDARY TO SET UP NEAR NRN MOHAVE INTO NRN CLARK THIS AFTERNOON. SHOULD BE ACTIVE DAY FROM THIS AREA NWD INTO SCNTRL NV. AIRMASS STILL VERY MOIST AND UNSTABLE WITH DRYING CONFINED TO DESERTS IN SAN BERNARDINO COUNTY AND POSSIBLY UP INTO SRN MOHAVE AND SRN CLARK. LAS VEGAS VALLEY ON EDGE AND IS TOUGH CALL FOR THIS AFTERNOON. DAYSHIFT WILL JUST HAVE TO EXAMINE 12Z DATA. RAMMS MODEL INDICATING CAPES BETWEEN 1500 AND 2500 LATER THIS MORNING THRU AFTERNOON IN ALL AREAS EXCEPT SAN BERNARDINO COUNTY BUT CAPES DO BEGIN TO DIMINISH IN SRN CLARK COUNTY LATE IN THE AFTERNOON. DRYING SHOULD EXTEND FURTHER N TOMORROW AS SUBTROPICAL RIDGE BUILDS INTO SRN CA. BEGINNINGS OF THIS SHOWING ON WATER VAPOR SOUTH OF CURRENT UPPER TROF CIRCULATION MOVING INTO SRN CA. EXTENDED LUKS DRY AND HOT. IN SHORT TERM...STILL HAVE CONVECTION BUILDING SEWD THRU LAKES AND INTO NRN HALF OF MOHAVE COUNTY. ALSO...LEADING EDGE OF UPPER CIRCULATION CREATING ISOLATED CONVECTION NEAR SRN MOHAVE LAST HOUR OR TWO. WILL HAVE TO ADD IN MORNING THUNDERSTORMS TO THESE AREAS TODAY. LAS 221. SKRBAC
In the hours before
Local storm report, Jul 24, 1:52 AM MST, 1 hour before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NEVADA
152 AM PDT FRI JUL 24 1998
TIME(PDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0720 PM LIDA NV FLOODING
07/23/98 ESMERALDA SEVERAL ROADS WASHED
OUT...INCLUDING HIGHWAY
266 BETWEEN LIDA AND
PALMETTO AND HIGHWAY 264
IN SOUTHERN PART OF
FISHLAKE VALLEY. 12
PERSONS RESCUED FROM
STRANDED VEHICLES AND
AT LEAST TWO CARS SWEPT
AWAY BY FLOOD WATERS IN
SOUTHERN AND WESTERN
ESMERALDA COUNTY.
0730 PM DYER NV FLOODING
07/23/98 ESMERALDA HIGHWAY 264 WASHED OUT
NORTH OF CIRCLE L RANCH.Local storm report, Jul 24, 1:56 AM MST, 56 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED FOR REPORT TIMES
NATIONAL WEATHER SERVICE LAS VEGAS NEVADA
156 AM PDT FRI JUL 24 1998
TIME(PDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0650 PM LIDA NV FLOODING
07/23/98 ESMERALDA SEVERAL ROADS WASHED
OUT...INCLUDING HIGHWAY
266 BETWEEN LIDA AND
PALMETTO AND HIGHWAY 264
IN SOUTHERN PART OF
FISHLAKE VALLEY. 12
PERSONS RESCUED FROM
STRANDED VEHICLES AND
AT LEAST TWO CARS SWEPT
AWAY BY FLOOD WATERS IN
SOUTHERN AND WESTERN
ESMERALDA COUNTY.
0700 PM DYER NV FLOODING
07/23/98 ESMERALDA HIGHWAY 264 WASHED OUT
x NORTH OF CIRCLE L RANCH.Local storm report, Jul 24, 1:56 AM MST, 56 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED FOR REPORT TIMES
NATIONAL WEATHER SERVICE LAS VEGAS NEVADA
156 AM PDT FRI JUL 24 1998
TIME(PDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0650 PM LIDA NV FLOODING
07/23/98 ESMERALDA SEVERAL ROADS WASHED
OUT...INCLUDING HIGHWAY
266 BETWEEN LIDA AND
PALMETTO AND HIGHWAY 264
IN SOUTHERN PART OF
FISHLAKE VALLEY. 12
PERSONS RESCUED FROM
STRANDED VEHICLES AND
AT LEAST TWO CARS SWEPT
AWAY BY FLOOD WATERS IN
SOUTHERN AND WESTERN
ESMERALDA COUNTY.
0700 PM DYER NV FLOODING
07/23/98 ESMERALDA HIGHWAY 264 WASHED OUT
x NORTH OF CIRCLE L RANCH.The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 4:49 AM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
| Jul 23, 6:14 PM MST | Flash Flood Warning | VEF | Esmeralda | 116 min |
| Jul 23, 11:22 PM MST | Flash Flood Warning | VEF | Clark | 2 hr |
| Jul 24, 3:15 PM MST | Severe Thunderstorm Warning | VEF | Clark | 60 min |
| Jul 24, 3:21 PM MST | Flash Flood Warning | VEF | Clark | 119 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.