Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 26, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 12, 1999, 6:26 AM MST for Mohave County, Arizona. It was in force for 64 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 12, 1999, 6:26 AM MST (13:26 UTC)
- Expired
- Jul 12, 1999, 7:30 AM MST
- In force
- 64 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, 1.4 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1297 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLAS 121328 FFWLAS AZC015-121430- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 626 AM PDT (626 AM MST) MON JUL 12 1999 * FLASH FLOOD WARNING FOR WEST CENTRAL MOHAVE COUNTY IN NORTHWESTERN ARIZONA * UNTIL 730 AM MST * SOME LOCATIONS AFFECTED KINGMAN STATE ROUTE 66 BETWEEN KINGMAN AND TRUXTON * AT 620 AM MST RADAR SHOWED A STORMS CONTAINING VERY HEAVY RAINFALL MOVING INTO KINGMAN. THESE STORMS WILL LIKELY PRODUCE RAINFALL RATES IN EXCESS OF 1 INCH PER HOUR... RESULTING IN FLASH FLOODING OF WASHES AND LOW-LYING AREAS. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. IF WATER COVERS THE ROADWAY...DO NOT ATTEMPT TO DRIVE THROUGH IT. IT ONLY TAKES ABOUT A FOOT OR TWO OF WATER TO CAUSE A CAR TO FLOAT. DO NOT DRIVE AROUND BARRICADES.
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 12, 5:42 AM MST, 44 minutes earlier.
Area forecast discussion, Jul 12, 5:42 AM MST, 44 minutes before
MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION ...UPDATED NATIONAL WEATHER SERVICE LAS VEGAS NV 542 AM PDT MON JUL 12 1999 SYNOPSIS...WEATHER DISTURBANCE OVER NORTHWEST ARIZONA WILL CONTINUE MOVING WEST...AND WILL BRING SCATTERED SHOWERS AND THUNDERSTORMS TO THE REGION TODAY. EXPECT IMPROVING CONDITIONS THIS AFTERNOON OVER NORTHWEST ARIZONA AND SOUTHERN NEVADA IN THE WAKE OF THIS DISTURBANCE. HIGH PRESSURE WILL REFORM NEAR THE FOUR CORNERS ON TUESDAY...AND THIS WILL GIVE THE REGION A SOUTH OR SOUTHEAST FLOW ALOFT. OVERALL THE AIRMASS WILL REMAIN FAIRLY MOIST AND UNSTABLE THROUGH MIDWEEK. DAYTIME TEMPERATURES WILL BE NEAR OR BELOW NORMAL. DISCUSSION...VORT MAX OVER FAR NW AZ HAS INTENSIFIED AS EVIDENCED BY SATELLITE AND RADAR TRENDS. HAVE UPDATED THE FORECAST TO INCREASE AREAL COVERAGE OF SHOWERS/THUNDERSTORMS AND INCREASED POPS ACROSS MUCH OF THE CWA TODAY. VORT FEATURE WILL CONTINUE MOVING WWD...WITH IMPROVING CONDITIONS ANTICIPATED OVER NW AZ AND SRN NV THIS AFTERNOON. AUTOMATED GAGES THUS FAR HAVE RECORDED LIGHT RAINFALL AMOUNTS OVER NW AZ AND FAR SRN NV. HOWEVER...MODERATE TO LOCALLY HEAVY RAINFALL IS POSSIBLE WITH ANY CONVECTION. .LAS...NONE.
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 7:30 AM MST | Flash Flood Warning | VEF | Mohave | 60 min |
Nearby
Flash Flood Warnings in Arizona, 1999Every flash flood warning in 1999
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.