Alert archive / Arizona / Flash Flood Warnings in 1997

Flash Flood Warning 10, NWS Las Vegas, NV

July 28, 1997Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 28, 1997, 12:55 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 65 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 28, 1997, 12:55 PM MST (19:55 UTC)
Expired: Jul 28, 1997, 2:00 PM MST
In force: 65 min
Issued by: NWS Las Vegas, NV
Area: Whole counties

Counties Mohave County, AZ, Clark County, NV

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 7.9 hours before the alert went out and 162 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 15 J/kg
Mixed-layer CIN: -190 J/kg
Mixed-layer LCL: 2642 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 49 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Las Vegas, NV wrote its last area forecast discussion before this flash flood warning went out at Jul 28, 8:51 AM MST, 4 hours 4 minutes earlier.

Area forecast discussion, Jul 28, 8:51 AM MST, 4 hours 4 minutes before

MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
850 AM PDT MON JUL 28 1997

TSTMS CONTG THIS MRNG MNLY CONCENTRATED IN SRN INYO AND ERN SAN
BERNARDINO CNTYS. TSTMS DVLPD AHD OF VORT ROTATING THRU WK TROF
ALNG CA CST. 24H CHG SHWS DWPTS UP SIGNIFICANTLY ACRS XTRM SRN NV
WITH LESS RISES ACRS RMDR OF RGN.  MDLS HAVING TROUBLE RESOLVING
THE WK IMPULSES IN FLO BUT OVRALL PTTN TO CHG LTL TDA/TUE.
MODIFIED DRA SNDG SHWS INVERTED-V SNDG FOR THREAT OF GUSTY
DOWNBURST WNDS.  WILL NOT ISSUE FFA AS WV LOOP SHWS MOIST MID/UPR
LVLS HAVE SHFTD E INTO AZ AND MOVEMENT OF STORMS 10-20KTS FRM THE
SE. WILL BE ISSUING AN UPDT TO CLEAN UP FIRST PD IN ALL ZNS.  LASH
432.  PIERCE

SRN NV...NONE
ERN CA...NONE
NW AZ ...NONE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:15 PM MST	Flash Flood Warning	VEF	Mohave	45 min
Jul 28, 12:15 PM MST	Severe Thunderstorm Warning	VEF	Mohave	45 min
Jul 28, 12:55 PM MST	Severe Thunderstorm Warning	VEF	Mohave	65 min
Jul 28, 1:37 PM MST	Severe Thunderstorm Warning	VEF	Mohave	53 min
Jul 28, 2:28 PM MST	Severe Thunderstorm Warning	VEF	Mohave	62 min

Nearby

Flash Flood Warnings in Arizona, 1997 Flash Flood Warnings in Nevada, 1997 Every flash flood warning in 1997

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.