Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 37, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 4, 1997, 3:22 PM MST for Pinal County, Arizona. It was in force for 33 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 4, 1997, 3:22 PM MST (22:22 UTC)
- Expired
- Aug 4, 1997, 3:55 PM MST
- In force
- 33 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 22:22 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, 10.4 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
- 481 J/kg
- Mixed-layer CIN
- -166 J/kg
- Mixed-layer LCL
- 1666 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 68 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 042225 RRA SVRTUS AZC021-042255- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 322 PM MST MON AUG 4 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 355 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...SOUTHEASTERN PINAL COUNTY AT 320 PM MST...DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 20 MILES WEST OF DUDLEYVILLE SOUTHWEST TO ELOY MOVING NORTHWEST AT 15 MPH. GLUECK
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 4, 2:33 PM MST, 49 minutes earlier.
Area forecast discussion, Aug 4, 2:33 PM MST, 49 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
230 PM MST MON AUG 4 1997
STORMS DEVELOPING OVER SOUTHEAST ARIZONA THIS AFTERNOON WORKING WITH
GOOD CAPE AND HAVE ALREADY PRODUCED LARGE HAIL AND DAMAGE SOUTH
TUCSON. WILL KEEP FLASH FLOOD WATCH IN PLACE ALTHOUGH THE STORMS
HAVE BEEN MOVING ENOUGH THAT SO FAR RAIN HAS NOT BEEN EXCESSIVE.
DEVELOPMENT HAS OCCURRED ON THE DEFORMATION AXIS AHEAD OF ELY WAVE
OVER MEXICO AND SHORT WAVE PROPAGATING THRU NW ARIZONA. MAY SEE
SOME REDEVELOPMENT IN THE TUCSON AREA YET THIS AFTERNOON WITH HEAVY
RAIN...THO SVR STORMS LIKELY TO PROPAGATE TO THE NORTH..NORTHWEST
AWAY FROM TUS.
COMPLEX OVER MEXICO CONTINUES TO WORK NORTHWARD AND WILL LIKELY BECOME
A PLAYER TOMORROW...IF NOT TONIGHT. WILL BASICALLY GO WITH CLIMO
TOMORROW AND WEDNESDAY AND TAKE IT DAY BY DAY. TUS 4353. DRB
TUS...FLASH FLOOD WATCH UNTIL 8 PM EASTERN PIMA...SANTA CRUZ...PINAL
...WESTERN COCHISE...WESTERN GRAHAM COUNTIES ZONES 27>30.In the hours before
Special weather statement, Aug 4, 11:56 AM MST, 3 hours 26 minutes before
AZZ019-026>030-042300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST MON AUG 4 1997...THIS PRODUCT IS NOT UPDATED.
...THERE IS A MODERATE RISK OVER SEVERE THUNDERSTORMS WITH HEAVY RAIN
OVER PARTS OF SOUTHEAST ARIZONA THIS AFTERNOON...
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 40 30 50 20 NW 12
GRAHAM 40 35 60 30 NW 10
GREENLEE 50 20 50 25 NW 8
TUCSON/ERN PIMA 40 50 70 40 NW 10
TOHONO OODHAM 35 40 70 40 NW 7
WESTERN PIMA 25 15 40 20 NW 4
SOUTHEAST PINAL 35 45 70 40 NW 10
SANTA CRUZ 50 50 70 40 NW 10
SYNOPSIS...
ABUNDANT SUNSHINE...LOW LEVEL MOISTURE...AND MODERATE INSTABILITY
WILL PRODUCE STRONG AND LOCALLY SEVERE CONVECTION OVER SOUTHEAST
ARIZONA THIS AFTERNOON. DEVELOPMENT SHOULD OCCUR OVER THE HIGHER
TERRAIN FROM AROUND BISBEE TOWARD SAFFORD AND PROPAGATE WESTWARD
DURING THE LATE AFTERNOON. DUE TO THE HIGH LOW LEVEL MOISTURE AND
RELATIVELY SLOW MOVEMENT OF THE STORMS LOCALLY HEAVY RAINFALL IS
LIKELY. SOME STORMS WILL LIKELY PRODUCE SEVERE WIND.
*****************************************************************
KEY...
AREAL COVERAGE - PERCENT OF COUNTY OR AREA THAT WILL EXPERIENCE
THUNDERSTORMS
PROB OF SEVERE - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
REACH SEVERE LEVELS (DAMAGING WIND AND/OR
LARGE HAIL)
RAIN GRTR THAN - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
PRODUCE RAIN EXCEEDING 1 INCH OR 2 INCHES IN
ANY LOCATION
STORM MOTION - GENERAL DIRECTION TO WHICH THE STORMS WILL
LIKELY MOVE AND SPEED IN MPH
NOTE...
VALID TIME IS FROM 12 NOON TO 12 MIDNIGHT OF THE DAY OF ISSUANCE
THIS PRODUCT IS NOT TO BE USED IN PLACE OF SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES.
END/BRIGHTSpecial weather statement, Aug 4, 12:32 PM MST, 2 hours 50 minutes before
AZZ019-026>030-042300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST MON AUG 4 1997...THIS PRODUCT IS NOT UPDATED...RETRAN
...THERE IS A MODERATE RISK OVER SEVERE THUNDERSTORMS WITH HEAVY RAIN
OVER PARTS OF SOUTHEAST ARIZONA THIS AFTERNOON...
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 40 30 50 20 NW 12
GRAHAM 40 35 60 30 NW 10
GREENLEE 50 20 50 25 NW 8
TUCSON/ERN PIMA 40 50 70 40 NW 10
TOHONO OODHAM 35 40 70 40 NW 7
WESTERN PIMA 25 15 40 20 NW 4
SOUTHEAST PINAL 35 45 70 40 NW 10
SANTA CRUZ 50 50 70 40 NW 10
SYNOPSIS...
ABUNDANT SUNSHINE...LOW LEVEL MOISTURE...AND MODERATE INSTABILITY
WILL PRODUCE STRONG AND LOCALLY SEVERE CONVECTION OVER SOUTHEAST
ARIZONA THIS AFTERNOON. DEVELOPMENT SHOULD OCCUR OVER THE HIGHER
TERRAIN FROM AROUND BISBEE TOWARD SAFFORD AND PROPAGATE WESTWARD
DURING THE LATE AFTERNOON. DUE TO THE HIGH LOW LEVEL MOISTURE AND
RELATIVELY SLOW MOVEMENT OF THE STORMS LOCALLY HEAVY RAINFALL IS
LIKELY. SOME STORMS WILL LIKELY PRODUCE SEVERE WIND.
*****************************************************************
KEY...
AREAL COVERAGE - PERCENT OF COUNTY OR AREA THAT WILL EXPERIENCE
THUNDERSTORMS
PROB OF SEVERE - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
REACH SEVERE LEVELS (DAMAGING WIND AND/OR
LARGE HAIL)
RAIN GRTR THAN - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
PRODUCE RAIN EXCEEDING 1 INCH OR 2 INCHES IN
ANY LOCATION
STORM MOTION - GENERAL DIRECTION TO WHICH THE STORMS WILL
LIKELY MOVE AND SPEED IN MPH
NOTE...
VALID TIME IS FROM 12 NOON TO 12 MIDNIGHT OF THE DAY OF ISSUANCE
THIS PRODUCT IS NOT TO BE USED IN PLACE OF SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES.
END/BRIGHTThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 5:20 PM MST | Flash Flood Warning | TWC | Cochise | 55 min |
| Aug 3, 5:20 PM MST | Flash Flood Warning | TWC | Cochise | 85 min |
| Aug 4, 1:02 PM MST | Severe Thunderstorm Warning | TWC | Pima | 48 min |
| Aug 4, 1:39 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 51 min |
| Aug 4, 2:06 PM MST | Severe Thunderstorm Warning | TWC | Pima | 44 min |
| Aug 4, 2:39 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 46 min |
| Aug 4, 4:17 PM MST | Severe Thunderstorm Warning | TWC | Pima | 63 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.