Alert archive / Nevada / Flash Flood Warnings in 1990
Flash Flood Warning 14, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 12, 1990, 4:23 AM PDT for Clark County, Nevada. It was in force for 79 min.
The area
The counties it named.
The facts
- Issued
- Aug 12, 1990, 4:23 AM PDT (11:23 UTC)
- Expired
- Aug 12, 1990, 5:42 AM PDT
- In force
- 79 min
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
County Clark County, NV
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 00:00Z, 11.4 hours before the alert went out and 99 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -33 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 KLAS 121123 FFWLAS AZC015-NVC003-121315- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 423 AM PDT SUN AUG 12 1990 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 615 AM PDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST ARIZONA ...NORTHWESTERN MOHAVE COUNTY IN SOUTH NEVADA ...SOUTHERN CLARK COUNTY... ART 415 AM PDT THE LAS VEGAS RADAR SHOW A HEAVY THUNDERSORM OVER THE EXTREME SOUTHERN TIP OF NEVADA. THE POLICE DEPARTMENT IN BULLHEAD CITY REPORTS THAT HEAVY RAIN IS OCCURRING ON THE SOUTH SIDE OF TOWN AND THE PORTIONS OF HIGHWAY 95 IS CLSED ON THE SOUTH SIDE OF TOWN DUE TO HEAVY RUNOFF. 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. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. DJR/1123Z
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
Local storm report, Aug 11, 10:31 PM PDT, 5 hours 52 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS, NV
1026 PM PDT SAT AUG 11 1990
TIME PDT PLACE EVENT
943 PM LAUGHLIN, NV LAUGHLIN FIRE STATION REPORTED A
THUNDERSTORM WITH LIGHT RAIN.
945 PM WEATHER SPOTTER AT WEATHER SPOTTER REPORTED A THUNDER-
MESQUITE, NV WEATHER SPOTTER REPORTED LIGHT RAIN
WITH A THUNDERSTORM.
951 PM OVERTON BEACH THE NATIONAL PARK SERVICE REPORTED
A THUNDERSTORM WITH 50 TO 60 MILES
AN HOUR WIND.
1010 PM LAKE MEAD MARINAS THE NATIONAL PARK SERVICE REPORTED
WINDS 40 TO 50 MILES AN HOUR WITH
GUSTS TO 60 AT ECHO BAY AND OVERTON
BEACH..25 TO 30 MILES AN HOUR AT
COTTONWOOD COVE AND 20 TO 30 MILES AN
HOUR AT KATHERINES LANDING. THUNDER-
STORMS NEARBY.
DODD/0529ZSpecial weather statement, Aug 11, 11:06 PM PDT, 5 hours 17 minutes before
NVZ-008-009-121200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1101 PM PDT SAT AUG 11 1990 ...THUNDERSTORMS AND SHOWERS ARE DIMINISHING OVER SOUTHERN NEVADA... THUNDERSTORMS WITH FREQUENT LIGHTNING AND LIGHT RAIN WERE STILL OCCURING OVER NORTHEAST AND THE EXTREME SOUTHERN TIP OF SOUTHERN CLARK COUNTY. THESE THUNDERSTORMS WERE MOVING TO THE SOUTH AT ABOUT 20 MILES AN HOUR. THUNDERSTORMS WITH LIGHT RAIN THIS EVENING IN SOUTHERN WERE REPORTED AT TONOPAH IN NYE COUNTY AND PIOCHE AND PANACA IN LINCOLN COUTNTY. ALSO AT MESQUITE AND LAUGHLIN IN CLARK COUNTY. WINDS 40 TO 50 MILES AN HOUR WITH GUSTS TO 60 WERE REPORTED BY PARK SERVICE AT ECHO BAY AND OVERTON BEACH. THUNDERSTORMS ARE EXPECTED TO CONTINUE OVER SOUTHERN NEVADA INTO SUNDAY EARLY MORNING HOURS. SOME OF THEM MAY PRODUCE HEAVY RAIN..STRONG GUSTY WINDS..SMALL HAIL AND DEADLY LIGHTNING. REMEMBER..NEVER TRY TO CROSS FLOODED ROADS ON FOOT OR IN YOUR CAR. IF LIGHTNING IS NEARBY TAKE SHELTER INDOORS OR IN YOUR CAR. NEVER SEEK SHELTER FROM LIGHTNING UNDER A TREE. LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION. DODD/0604Z
Special weather statement, Aug 12, 12:06 AM PDT, 4 hours 17 minutes before
NVZ009-121200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1204 PM PDT SUN AUG 12 1990 ...LAS VEGAS IS SURROUNDED BY THUNDERSTORMS WITH OCCASIONAL TO FREQUENT LIGHTNING AND GUSTY WINDS... THUNDERSTORMS WITH OCCASIONAL TO FREQUENT LIGHTNING AND GUSTY WINDS IS OVER THE LAS VEGAS VALLEY. AT 1138 PM THE WIND GUSTED FROM THE NORTH TO 44 MILES AN HOUR AT MCCARRAN INTERNATIONAL AIRPORT. BLOWING SAND AND DUST REDUCED VISIBILITY TO 4 MILES. THE THUNDERSTORMS WERE MOVING TO THE SOUTH AT 15 MILES AN HOUR. THUNDERSTORMS ARE EXPECTED TO CONTINUE OVER SOUTHERN NEVADA INTO THE EARLY MORNING HOURS. SOME OF THEM MAY PRODUCE HEAVY RAIN..STRONG GUSTY WINDS..SMALL HAIL AND DEADLY LIGHTNING. REMEMBER..NEVER ATTEMPT TO CROSS FLOODED ROADS ON FOOT OR IN YOUR CAR. IF LIGHTNING IS NEARBY TAKE SHELTER INDOORS OR IN YOUR CAR. NEVER SEEK SHELTER FROM LIGHTNING UNDER A TREE. LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION. DODD/0705Z
Special weather statement, Aug 12, 12:22 AM PDT, 4 hours 1 minute before
NVZ009-121200- SPECIAL WEATHER STATEMENT...CORRECTED... NATIONAL WEATHER SERVICE LAS VEGAS NV 1204 AM PDT SUN AUG 12 1990 ...LAS VEGAS IS SURROUNDED BY THUNDERSTORMS WITH OCCASIONAL TO FREQUENT LIGHTNING AND GUSTY WINDS... THUNDERSTORMS WITH OCCASIONAL TO FREQUENT LIGHTNING AND GUSTY WINDS IS OVER THE LAS VEGAS VALLEY. AT 1138 PM THE WIND GUSTED FROM THE NORTH TO 44 MILES AN HOUR AT MCCARRAN INTERNATIONAL AIRPORT. BLOWING SAND AND DUST REDUCED VISIBILITY TO 4 MILES. THE THUNDERSTORMS WERE MOVING TO THE SOUTH AT 15 MILES AN HOUR. THUNDERSTORMS ARE EXPECTED TO CONTINUE OVER SOUTHERN NEVADA INTO THE EARLY MORNING HOURS. SOME OF THEM MAY PRODUCE HEAVY RAIN..STRONG GUSTY WINDS..SMALL HAIL AND DEADLY LIGHTNING. REMEMBER..NEVER ATTEMPT TO CROSS FLOODED ROADS ON FOOT OR IN YOUR CAR. IF LIGHTNING IS NEARBY TAKE SHELTER INDOORS OR IN YOUR CAR. NEVER SEEK SHELTER FROM LIGHTNING UNDER A TREE. LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION. DODD/0705Z
Special weather statement, Aug 12, 1:39 AM PDT, 2 hours 44 minutes before
NVZ009-121300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 0135 AM PDT SUN AUG 12 1990 ...THUNDERSTORMS ARE DIMINISHING AND MOVING INTO NORTHWEST ARIZONA... THUNDERSTORMS WITH OCCASIONAL TO FREQUENT LIGHTNING AND GUSTY WINDS THAT WERE OVER THE LAS VEGAS VALLEY ARE DIMINISHING AND MOVING INTO NORTWEST MOHAVE COUNTY IN ARIZONA. SATALLITE AND WEATHER DETECTION DATA SHOWS THUNDERSTORMS ARE INCREASING AGAIN OVER LINCOLN COUNTY. THESE THUNDERSTORMS ARE EXPECTED TO MOVE SOUTHWARD TO CLARK COUNTY. THUNDERSTORMS ARE EXPECTED TO CONTINUE OVER SOUTHEAST NEVADA UNTIL AROUND SUNRISE. SOME OF THEM MAY PRODUCE HEAVY RAIN..STRONG GUSTY WINDS..SMALL HAIL AND DEADLY LIGHTNING. REMEMBER..NEVER ATTEMPT TO CROSS FLOODED ROADS ON FOOT OR IN YOUR CAR. IF LIGHTNING IS NEARBY TAKE SHELTER INDOORS OR IN YOUR CAR. NEVER SEEK SHELTER FROM LIGHTNING UNDER A TREE. LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION. DODD/0838Z
Nearby
Flash Flood Warnings in Nevada, 1990Every flash flood warning in 1990
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.