Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 20, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 28, 1997, 12:15 PM MST for Mohave County, Arizona. It was in force for 45 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 28, 1997, 12:15 PM MST (19:15 UTC)
- Expired
- Jul 28, 1997, 1:00 PM MST
- In force
- 45 min
- Issued by
- NWS Las Vegas, NV
- Area
- Whole counties
County Mohave County, AZ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 28, 12:52 PM MST | Hail 1 | Kingman, AZ | A weather spotter in Kingman observed one inch diameter hail. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.3 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
- 39 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1052 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Las Vegas, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 28, 8:51 AM MST, 3 hours 24 minutes earlier.
Area forecast discussion, Jul 28, 8:51 AM MST, 3 hours 24 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, 12:55 PM MST | Flash Flood Warning | VEF | Mohave | 65 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
Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.