Alert archive / Arizona / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 21, NWS Tucson, AZ

June 12, 1997Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jun 12, 1997, 12:17 PM MST for Pinal County, Arizona. It was in force for 58 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
Jun 12, 1997, 12:17 PM MST (19:17 UTC)
Expired
Jun 12, 1997, 1:15 PM MST
In force
58 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 19:19 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 12:00Z, 7.3 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.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 1997-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 750 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 1997-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
750 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1789 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

307 
WUUS1 KTUS 121918 RRA
SVRTUS
AZC021-122015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1217 PM MST THU JUN 12 1997

THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL ARIZONA

   ...EASTERN PINAL COUNTY
 
AT 1211 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ABOUT
7 MILES NORTH OF ORACLE MOVING NORTHEAST AT 30 MPH. VERY STRONG
WINDS OVER 60 MPH AND LARGE HAIL NEAR ONE INCH DIAMETER ARE POSSIBLE
WITH THIS STORM.

SOME LOCATIONS IN THE PATH OF THIS STORM ARE...
MAMMOTH                 BY 1227 PM MST

THIS WARNING EXTENDS THE PREVIOUS WARNING FOR EASTERN PINAL COUNTY
THAT EXPIRED AT 1215 PM MST. THUNDERSTORMS CONTINUE TO DEVELOP FROM
20 MILES NORTHWEST OF ORACLE JUNCTION SOUTH TO NEAR MARANA.
MOVEMENT OF THESE STORMS IS TO THE NORTHEAST AROUND 15 TO 25 MPH.

GLUECK

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 11:24 AM MSTSevere Thunderstorm WarningTWCPinal51 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.