Alert archive / Nevada / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 5, NWS Las Vegas, NV

July 14, 1990Clark County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 14, 1990, 11:07 PM PDT for Clark County, Nevada. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 14, 1990, 11:07 PM PDT (06:07 UTC)
Expired
Jul 15, 1990, 2:15 AM PDT
In force
3 hr
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, 6.1 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.

Skew-T log-pSkew-T log-p diagram, Mercury/Desert R, NV at 00:00Z on 1990-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 00:00Z on 1990-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.193958Sfc1 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
20 J/kg
Mixed-layer CIN
-368 J/kg
Mixed-layer LCL
2607 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 severe thunderstorm 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, Jul 14, 7:40 PM PDT, 3 hours 27 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS, NV
734 PM PDT SAT JUL 14 1990

TIME PDT     PLACE                 EVENT
725  PM      BEATTY (SPOTTER)      RAIN BEGAN AROUND 630 PM AND 1.47
                                   INCHES OF RAIN RECORDED IN 1 HOUR.
                                   RUNNING WATER ACROSS HER PROPERTY
                                   HAS STOPPED. WINDS ARE CALM.

END
HCB/0240Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 9:42 PM PDTFlash Flood WarningVEFClark, Nye2 hr
Jul 14, 9:42 PM PDTSevere Thunderstorm WarningVEFClark, Nye2 hr
Jul 14, 11:07 PM PDTFlash Flood WarningVEFClark3 hr

Nearby

Severe Thunderstorm Warnings in Nevada, 1990Every severe thunderstorm 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.