Alert archive / Arizona / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 29, NWS Tucson, AZ

July 28, 1997Santa Cruz County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 28, 1997, 7:16 PM MST for Santa Cruz County, Arizona. It was in force for 29 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 28, 1997, 7:16 PM MST (02:16 UTC)
Expired
Jul 28, 1997, 7:45 PM MST
In force
29 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 46 km from the middle of the area, began a volume at 02:18 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, 2.3 hours before the alert went out and 72 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 00:00Z on 1997-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 728 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 00:00Z on 1997-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.193958Sfc1 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
728 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2568 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUS 290216 RRA
SVRTUS
AZC023-290245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
716 PM MST MON JUL 28 1997

THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHERN ARIZONA

   ...NORTHERN SANTA CRUZ COUNTY
 
AT 710 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12
MILES NORTHWEST OF PATAGONI@A OR 9 MILES EAST NORTHEAST OF TUBAC
MOVING EAST NORTHEAST AT 10 MPH. THIS STORM WAS CAPABLE OF
PRODUCING WIND GUSTS TO 60 MPH AND ONE INCH HAIL.

OKULSKI

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 Jul 28, 5:17 PM MST, 1 hour 59 minutes earlier.

Area forecast discussion, Jul 28, 5:17 PM MST, 1 hour 59 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION...RETRANSMISSION
NATIONAL WEATHER SERVICE TUCSON AZ
230 PM MST MON JUL 28 1997

STORMS DEVELOPED ON WRN EDGE OF DEEP MSTR AND MOVG NE. BEST
REFLECTIVTY NEAR THE STORM BASE AND WE HAVE SEEN AN INCH OR SO
WITH HEAVIEST STORMS. WRN AND CNTRL PIMA AND ALL BUT EXTREME ERN
PINAL ARE DRY AND XCPT FOR A MTN TSTM OR TWO WILL NOT SEE MUCH.
TUS AND REST OF AREA WILL SEE STORMS THRU EARLY EVENING. THERE
STILL HAVING TROUBLE GETTING AWAY FROM MTNS WITH ANY KIND OF
PRECIP BUT AS AFTN WEARS ON WE MAY BE ABLE TO GET VALLEYS WET.

WITH CA LOW MOVG NWD RIDGE BUILDS BACK IN QUICKLY. XPCT ERN ZONES
TO REMAIN FAIRLY ACTIVE ON TUE BUT BACK TO MORE ACTIVE MONSOON BY
WED. MAY EVEN SEE AN UPSWING IN ACTIVITY TUE EVENING IN ZN 28.
THERE IS STILL THE PROBLEM OF TO MANY MID CLOUDS IN THE AREA ON
WED BUT IF MSTR FCST BY ETA RATHER THAN NGM VERIFIES THEN TSTM
POTENTIAL INCREASES.

TEMPS SHOULD BE  UP A LITTLE ON WTUE AND DOWN SOME ON
WED...ALL CLOUD COVER DEPENDENT. TUS 3234. HOLBROOK.

TUS...NONE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 4:00 PM MSTFlash Flood WarningTWCSanta Cruz90 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.