Alert archive / Arizona / Flash Flood Warnings in 1998

Flash Flood Warning 2, NWS Las Vegas, NV

July 19, 1998Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 19, 1998, 4:51 PM MST for Mohave County, Arizona. It was in force for 59 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 19, 1998, 4:51 PM MST (23:51 UTC)
Expired
Jul 19, 1998, 5:50 PM MST
In force
59 min
Issued by
NWS Las Vegas, NV
Area
Whole counties

County Mohave County, AZ

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.9 hours before the alert went out and 185 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, Flgstf/Belemont, AZ at 12:00Z on 1998-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 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, Flgstf/Belemont, AZ at 12:00Z on 1998-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 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
84 J/kg
Mixed-layer CIN
-338 J/kg
Mixed-layer LCL
2314 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KLAS 192351
FFWLAS
AZC015-200050-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
451 PM PDT (451 PM MST) SUN JUL 19 1998


*  FLASH FLOOD WARNING FOR
   EAST CENTRAL MOHAVE COUNTY IN NORTHWESTERN ARIZONA

*  UNTIL 550 PM MST (550 PM PDT)

*  SOME LOCATIONS AFFECTED
   WESTERN PORTION OF THE GRAND CANYON NATIONAL PARK
   KANAB PLATEAU

*  SATELLITE IMAGERY AND CEDAR CITY DOPPER RADAR INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN OVER THE WESTERN PORTION OF THE
GRAND CANYON NATIONAL PARK AND THE KANAB PLATEAU.  THESE
THUNDERSTORMS HAVE BEEN FAIRLY STATIONARY FROM 400 PM UNTIL 440 PM.
WHITHOUT MUCH MOVEMENT EXHIBITED BY THESE STORMS...HEAVY RAINS WILL
LIKELY CAUSE LOCAL FLOODING ACROSS THESE AREAS.

AREA RESIDENTS OR TOURISTS SHOULD MONITOR FLOOD CONDITIONS... AND BE
PREPARED TO MOVE TO HIGHER GROUND... SHOULD FLOOD WATERS THREATEN.
IF FLASH FLOODING IS OBSERVED... ACT QUICKLY. MOVE TO HIGHER GROUND
TO: ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING
WHEN WATER BEGINS RISING.

CORDERO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 6:23 PM MSTSevere Thunderstorm WarningVEFMohave47 min

Nearby

Flash Flood Warnings in Arizona, 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.