Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 82, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 23, 1997, 6:18 PM MST for Pinal County, Arizona. It was in force for 62 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 23, 1997, 6:18 PM MST (01:18 UTC)
- Expired
- Aug 23, 1997, 7:20 PM MST
- In force
- 62 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 01:21 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
Tuscon, AZ (KTUS), launched 00:00Z, 1.3 hours before the alert went out and 92 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
- 516 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 2990 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 56 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 KTUS 240118 RRA SVRTUS AZC021-240220- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 618 PM MST SAT AUG 23 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 720 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...CENTRAL PINAL COUNTY AT 617 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTH OF CASA GRANDE MOVING NORTH AT 5 MILES PER HOUR. THIS STORM WILL AFFECT CASA GRANDE...ARIZONA CITY...CHUICHU AND PORTIONS OF INTERSTATE 8.
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 Tucson, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 23, 2:30 PM MST, 3 hours 48 minutes earlier.
Area forecast discussion, Aug 23, 2:30 PM MST, 3 hours 48 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST SAT AUG 23 1997 HI PRES ALF OVR SE AZ THIS AFTN. VRY LITTLE VERTICAL WND SHEAR TO WORK WITH...THEREFORE TS TO BE PULSE TYPE WITH LITTLE MOVMNT. OUTFLOW BNDRIES ARE ALLOWG SOME TS TO PROPOGATE INTO THE LWR VLYS. HI CNTR SHIFTS NEWD TO A MORE FAVORABLE LOCATION IN RESPONSE TO A STG TROF PUSHG INTO THE PAC NW. STGR SELY FLOW TO DVLP SUN AND MON WITH AN UPSWING IN MONSOON ACTIVITY ANTICIPATED. WL GO WITH ONLY A MODEST INCRS IN POPS ON THE COUNT OF TWO COMPETING FACTORS. H5 HGTS LWR OVR THE SIERRA MADRE WHICH SHOULD ALLOW AFTN/EVE MCS DVLPMNT. HWVR THE INFLUX OF MID LVL DRY AIR FM SWLY FLOW ACRS NW AZ DURG THE PD MAY LIMIT THE EXTENT OF DP MSTR NECESSARY FOR A REAL ACTIVE MONSOON PATTERN. A STGR TROF TO MOV INTO THE PAC NW BY MID WEEK. MODELS DIFFER SOMEWHAT ON THE POSTN OF THE HI ALF. ECMWF DEPICTS A DRIER SCENARIO THE MRF. AGREE WITH PHX THAT A STANDARD LOW GRADE MONSOON LOOKS GOOD. TUS 3233. OKULSKI TUS...NONE.
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.