Alert archive / Nevada / Flash Flood Warnings in 1990
Flash Flood Warning 15, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 14, 1990, 4:58 PM PDT for Lincoln County, Nevada. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 14, 1990, 4:58 PM PDT (23:58 UTC)
- Expired
- Aug 14, 1990, 7:00 PM PDT
- In force
- 2 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
County Lincoln 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 12:00Z, 12.0 hours before the alert went out and 151 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
- 89 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 2824 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -6 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 142358 FFWLAS NVC017-150200- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 458 PM PDT TUE AUG 14 1990 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 700 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN SOUTH CENTRAL NEVADA ...CENTRAL LINCOLN COUNTY AT 455 PM PDT WEATHER RADAR AND LIGHTNING DETECTION SENSORS SHOWED A SEVERE THUNDERSTORM OVER CENTRAL LINCOLN COUNTY IN SOUTHERN NEVADA. THE TOWNS OF CALIENTE...ASH SPRINGS AND ALAMO ARE INCLUDED IN THE WARNING AREA. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. DJR/2358Z
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 14, 12:17 PM PDT, 4 hours 41 minutes before
NVZ008-009-150000-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1215 PM PDT TUE AUG 14 1990
...THUNDERSTORMS ARE BUILDING ACROSS SOUTHERN NEVADA AGAIN THIS AFTERNOON
AND WILL CONTINUE THROUGH THIS EVENING...
MOIST...UNSTABLE AIR REMAINS OVER SOUTHERN NEVADA TODAY AND THUNDERSTORMS
ARE BEGINNING TO DEVELOP AGAIN THIS AFTERNOON. SOME OF THE THUNDERSTORMS
MAY PRODUCE HEAVY RAIN...STRONG GUSTY WINDS...DEADLY LIGHTNING AND HAIL.
LOCAL FLOODING OF LOW LYING AREAS AND NORMALLY DRY WASHES IS POSSIBLE
THIS AFTERNOON AND EVENING. REMEMBER NEVER ATTEMPT TO CROSS A FLOODED
ROADWAY...EITHER ON FOOT OR IN YOUR CAR.
GUSTY WINDS ASSOCIATED WITH THUNDERSTORMS WILL CAUSE LOCAL AREAS
OF BLOWING DUST AND SAND WHICH WILL REDUCE VISIBLILTY AT TIMES.
IF LIGHTNING IS NEARBY TAKE SHELTER INDOORS OR IN YOUR CAR. NEVER
SEEK SHELTER FROM LIGHTNING UNDER A TREE.
MOTORISTS AND PERSONS ENGAGED IN OUTDOOR ACTIVITIES IN SOUTHERN
NEVADA TODAY...ESPECIALLY BOATERS ON LAKE MEAD AND LAKE MOHAVE...
SHOULD KEEP A WATCHFUL EYE ON THE WEATHER AND TAKE NECESARY PRE-
CAUTIONS IF THUNDERSTORMS MOVE INTO YOUR AREA.
LISTEN TO COMMERCIAL RADIO...TELEVISION OR NOAA WEATHER RADIO FOR
THE LATEST FORECASTS OR ADDITIONAL STATEMENTS.
HCB/1915ZSpecial weather statement, Aug 14, 2:46 PM PDT, 2 hours 12 minutes before
NVZ008-009-150200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS, NV 245 PM PDT TUE AUG 14 1990 ...WIDELY SCATTERED THUNDERSTORMS THROUGH THIS EVENING... HOT AND MOIST AIR REMAINS OVER THE GREAT BASIN AND IS CAUSING WIDELY SCATTERED THUNDERSTORMS ACROSS SOUTHERN NEVADA AND THE EASTERN DESERTS OF CALIFORNIA. THE LAS VEGAS WEATHER RADAR AND LIGHTNING DETECTORS SHOW THUNDERSTORMS ACROSS WESTERN CLARK COUNTY AND SOUTHWESTERN LINCOLN COUNTY. THE MOST ACTIVE THUNDERSTORM IS A FEW MILES WEST OF MOUNTAIN PASS ALONG INTERSTATE 15. MOVEMENT OF THIS STORM IS FROM THE SOUTH AT 10 TO 15 MPH. THE THUNDERSTORMS ARE OF THE HIGH BASED TYPE AND WILL PRODUCE GUSTY WINDS TO OVER 50 MPH AND LOCAL AREAS OF BLOWING SAND THAT WILL REDUCE VISIBILITIES TO NEAR ZERO MILES...AT TIMES. THE THUNDERSTORMS WILL ALSO PRODUCE DEADLY LIGHTNING. PEOPLE INVOLVED IN OUTSIDE ACTIVITIES...ESPECIALLY MOTORISTS AND BOATERS SHOULD REMAIN ALERT IF THUNDER`STORMS DEVELOPE IN THEIR LOCATION. LISTEN TO COMMERCIAL RADIO...TELEVISION AND WEATHER RADIO FOR THE LOCAL FORECASTS AND ADDITIONAL STATEMENTS. HCB/2145Z
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 4:58 PM PDT | Severe Thunderstorm Warning | VEF | Lincoln | 2 hr |
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.