Alert archive / Nevada / Flash Flood Warnings in 1989

Flash Flood Warning 4, NWS Las Vegas, NV

August 9, 1989Nye County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Aug 9, 1989, 4:52 PM PDT for Nye County, Nevada. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 9, 1989, 4:52 PM PDT (23:52 UTC)
Expired
Aug 9, 1989, 8:00 PM PDT
In force
3 hr
Issued by
NWS Las Vegas, NV
Area
Whole counties

County Nye 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, 11.9 hours before the alert went out and 164 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.

Skew-T log-pSkew-T log-p diagram, Mercury/Desert R, NV at 12:00Z on 1989-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 806 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Mercury/Desert R, NV at 12:00Z on 1989-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
806 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
1206 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 9, 11:25 AM PDT, 5 hours 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS, NV
1125 AM PDT WED AUG 09 1989

...THUNDERSTORMS ARE EXPECTED OVER SOUTHERN NEVADA AGAIN THIS
                  AFTERNOON AND TONIGHT...

HIGH PRESSURE OVER THE FOUR CORNERS AREA CONTINUES TO GIVE SOUTHERN
NEVADA A MOIST UNSTABLE SOUTHERLY FLOW LOFT.  THE HEATING TODAY WILL
WILL CAUSE THE AIR TO BECOME MORE UNSTABLE AND THUNDERSTORMS WILL
ONCE AGAIN BE SET OFF.

THUNDERSTORMS ARE EXPECTED OVER SOUTHERN NEVADA WHICH INCLUDES THE
LAKE MEAD AND LAKE MOHAVE RECREATION AREAS.

THESE THUNDERSTORMS WILL PRODUCE DEADLY LIGHTNING..BRIEF HEAVY RAIN..
AND GUSTY WINDS. THE BRIEF HEAVY RAIN MAY CAUSE MINOR FLOODING..AVOID
CROSSING FLOODED ROADWAYS. THE GUSTY WINDS MAY CAUSE AREAS OF BLOWING
SAND AND DUST REDUCING ROADWAY VISIBILITIES. THE BLOWING SAND AND DUST
USUALLY LAST FOR SHORT DURATION.
.
A LAKE WIND ADVISORY IS IN EFFECT FOR LAKE MEAD AND LAKE MOHAVE. BOATERS
SHOULD BE WITHIN 4A SHORT DISTANCE OF THE SHORE OR DOCK WHEN THUNDERSTORMS
ARE IN THE AREA.

CONTINUE TO LISTEN TO THIS STATION OR COMMERICAL RADIO AND TV FOR
UPDATES AND POSSIBLE WARNINGS.
JWS/1824Z

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 8, 6:16 PM PDTSevere Thunderstorm WarningVEFClark44 min

Nearby

Flash Flood Warnings in Nevada, 1989Every flash flood warning in 1989

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.