Alert archive / Arizona / Flash Flood Warnings in 1997

Flash Flood Warning 21, NWS Las Vegas, NV

August 9, 1997Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Aug 9, 1997, 1:24 AM MST for Mohave County, Arizona. It was in force for 66 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: Aug 9, 1997, 1:24 AM MST (08:24 UTC)
Expired: Aug 9, 1997, 2:30 AM MST
In force: 66 min
Issued by: NWS Las Vegas, NV
Area: Whole counties

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 08:26 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 8.4 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-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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1807 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLAS 090828
FFWLAS
AZC015-090930-
 
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
124 AM PDT (124 AM MST) SAT AUG 9 1997
 
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL  230 AM PDT (230 AM MST)
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN NORTHWEST ARIZONA
 
   ...CENTRAL MOHAVE COUNTY
 
NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUES TO INDICATE
SEVERE THUNDERSTORMS ACROSS CENTRAL MOHAVE COUNTY EXTENDING
FROM CHLORIDE TO KINGMAN.  THESE STORMS ARE MOVING NORTHEAST
AT 5 TO 10 MPH.
 
THUS THE NATIONAL WEATHER SERVICE IN LAS VEGAS NEVADA IS
EXTENDING THE FLASH FLOOD AND SEVERE THUNDERSTORM WARNING
FOR CENTRAL MOHAVE COUNTY.
 
TH0SE TRAVELLING IN CENTRAL MOHAVE COUNTY...ESPECIALLY
ON INTERSTATE 40 AND HIGHWAY 93 SHOULD USE CAUTION.
DO NOT TO ATTEMPT TO CROSS ANY ROADWAYS COVERED WITH
WATER.  MOVE TO HIGHER GROUND IF FEASIBLE.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS 4UNTIL THE STORM HAS PASSED.
 
CORDERO

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 11:30 PM MST	Severe Thunderstorm Warning	VEF	Mohave	60 min
Aug 9, 12:29 AM MST	Flash Flood Warning	VEF	Mohave	61 min
Aug 9, 12:29 AM MST	Severe Thunderstorm Warning	VEF	Mohave	61 min
Aug 9, 1:24 AM MST	Severe Thunderstorm Warning	VEF	Mohave	66 min

Nearby

Flash Flood Warnings in Arizona, 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; radar from the NEXRAD Level II archive.