Alert archive / Arizona / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 126, NWS Tucson, AZ

November 11, 1997Pinal County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Nov 11, 1997, 3:20 PM MST for Pinal County, Arizona. It was in force for 65 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
Nov 11, 1997, 3:20 PM MST (22:20 UTC)
Expired
Nov 11, 1997, 4:25 PM MST
In force
65 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Pinal County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 10.3 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 1997-11-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 150 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 1997-11-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 square meters per square second.1939587897117136Sfc1 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
150 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1093 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

846 
WUUS1 KTUS 112221 RRA
SVRTUS
AZC021-112325-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
320 PM MST TUE NOV 11 1997


THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 425 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL ARIZONA

   ...NORTHEASTERN PINAL COUNTY


AT 319 PM MST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
9 MILES WEST OF KELVIN MOVING EAST AT 15 MPH.

SOME LOCATIONS IN THE PATH OF THIS STORM ARE...
KELVIN                  BY 348 PM MST
KEARNY                  BY 402 PM MST

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 Nov 11, 2:47 PM MST, 33 minutes earlier.

Area forecast discussion, Nov 11, 2:47 PM MST, 33 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
230 AM MST TUE NOV 11 1997

COLD AIR STORMS POPPED UP THIS AFTN SHOULD GO AWAY AT SUNSET.

PWATER SAT PIX SHOWS MSTR ADVECTING IN FROM SOUTH IN FRONT OF NEXT
SYS. MODELS WAY OFF ON STRENGTH AND ONLY MODEL THAT SEEMS CLOSE TO
REALITY IS EMCWF. THIS WOULD BE A COLDER WETTER STORM FOR NOT ONLY
SE AZ BUT POSSIBLY REST OF STATE. TONIGHTS MODEL RUNS MAY BE BETTER
AS SYS GETS CLOSE TO COAST BUT WE PUBLISH NOW SO WILL GO WITH
STRONGER STORM SCENARIO.

WILL HOLD OFF ON ANY WSW FOR NOW BUT COULD GET QUITE INTERESTING
LATE ON WED AS COLD AIR ALOFT MOVES IN. BUT MID LVLS SHOULD WARM
SOME TONIGHT AND MOST OF THE DAY WED AS WARM AIR ADVECTS IN FROM
SOUTH.  MM5 SHOWED +2C DEWPOINTS AT H7 BY 12Z AND THINK SNOW ON OUR
MTNS UNLIKELY UNTIL LATE WED. THIS MAY LIMIT HOW MUCH SNOW FALLS
SINCE SYS MAY NOT HANG AROUND LONG ENUF FOR BIG DUMPER. EXPECT IT TO
BE OUT OF STATE BY THU AM. NEXT SYS LINED UP FOR THU NIGHT AND FRI.
GIVEN MODELS PERFORMANCE ON LAST TWO SYS BELIEVE IT WILL ALSO
PRODUCE RAIN AND BE STRONGER THAN NOW FCST BY MODELS.

ALSO ADDED HEAVY PRECIP POTENTIAL FOR ZONE 30...COULD ALSO OCCUR IN
OTHER ZONES. POTENTIAL FOR AN INCH OR SO IN MTNS. VALLEYS SHOULD
SEE UP TO HALF INCH WITH MAYBE ANOTHER QUARTER INCH WED NIGHT.

ENDED ALL PRECIP FOR DAY THU BUT MAY GET SOME INSTABILITY SHOWERS
LIKE TODAY. GUESSING...ERR FORECASTING THIS WONT HAPPEN FOR NOW.
TUS 2770. HOLBROOK

TUS...NONE YET.

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.