Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 24, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 7, 1997, 3:12 PM MST for Pima County, Arizona. It was in force for 63 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 7, 1997, 3:12 PM MST (22:12 UTC)
- Expired
- Jul 7, 1997, 4:15 PM MST
- In force
- 63 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 10.2 hours before the alert went out and 84 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
- 807 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 2117 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUS 072212 RRA SVRTUS AZC019-072315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 312 PM MST MON JUL 7 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHERN ARIZONA ...NORTHEASTERN PIMA COUNTY AT 309 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR ORO VALLEY JUST NORTH OF TUCSON MOVING EAST NORTHEAST AT 15 MPH. SOME LOCATIONS IN THE PATH OF THIS STORM ARE... CATALINA BY 322 PM MST SUMMERHAVEN BY 352 PM MST MEYER
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 7, 2:30 PM MST, 42 minutes earlier.
Area forecast discussion, Jul 7, 2:30 PM MST, 42 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST MON JUL 7 1997 WELL...THE 12Z TUS RAOBS POTENTIAL HAS HELD PRETTY WELL TDA. HI CAPES HAVE TRANSLATED THROUGH TO A FEW SEVERE CELLS. COVERAGE GENERALLY THROUGH EASTERN ZONES AND A LITTLE MORE THAN INITIALLY EXPECTED. ALL A WLY FLOW HAS MEANT THE PAST 5 DAYS IS THAT MSTR MOVG UP THRU YUMA IN THE LOW LVLS HAS MIXED INTO THE LWR PTNS OF THE FLOW AND INTO OUR AREA. WE HAVE ALSO HAD REPEATED DOSES OF A MORE DIRECT NATURE WITH OUTFLOWS FROM TSTMS IN NWRN MEX THE LAST SVRL NIGHTS. YES...WLY FLOW IS INCRG WITH SOME ENERGY TO OUR N BREAKING INTO THE RDG...BUT I THINK THAT AT LEAST FAR SE PTNS WILL HOLD ONTO SOME MSTR RIGHT ON UNTIL THE RDG REBUILDS TO OUR E WITH SLY FLOW PICKING UP MORE ACTION FOR OUR AREA. WILL GO AHEAD AND SHOW A DECRG TSTM TREND WITH ONLY ZN030 HOLDING ON TO AFTN TSTMS BY PD 4. EXTD LOOKS MORE PROMISING...BUT WE NEED TO WATCH FOR THE POSSIBILITY THAT THE MRF HAS CONTINUED TO ADVERTISE. IF THE RDG SETS UP TOO FAR E...WE COULD BE IN A DRIER THAN DESIRED SWLY FLOW ONLY ON THE WRN EDGE OF THE REAL WX PAST THE EXTD FCST PD. TUS2000. MEYER TUS...NONE
In the hours before
Special weather statement, Jul 7, 11:45 AM MST, 3 hours 27 minutes before
AZZ019-026>030-080700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST MON JUL 7 1997
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 30 30 0 0 W10
GRAHAM 20 10 0 0 W10
GREENLEE 20 0 0 0 SW15
TUCSON/ERN PIMA 30 30 0 0 W15
TOHONO OODHAM 0 0 0 0
WESTERN PIMA 0 0 0 0
SOUTHEAST PINAL 10 0 0 0 W10
SANTA CRUZ 30 30 0 0 W10
SYNOPSIS...
INFLUX OF MOISTURE AND INSTABILITY FROM NORTHERN MEXICO OVERNIGHT
ADDED TO WHAT WAS HERE HAS INCREASED THE CHANCE OF THUNDERSTORMS
TODAY AND THIS EVENING THROUGH ESPECIALLY COCHISE...SANTA CRUZ
AND EASTERN PIMA COUNTIES. SOME STORMS THIS AFTERNOON WILL HAVE
THE POTENTIAL TO GENERATE SEVERE WEATHER WITH STRONG GUSTY WINDS.
RAINFALL AMOUNTS SHOULD GENERALLY BE A TENTH OF AN INCH OR LESS
FROM ANY GIVEN STORM.
*****************************************************************
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 FROM 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/WJMSpecial weather statement, Jul 7, 11:51 AM MST, 3 hours 21 minutes before
AZZ019-026>030-080700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST MON JUL 7 1997
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 30 30 0 0 W10
GRAHAM 20 10 0 0 W10
GREENLEE 20 0 0 0 SW15
TUCSON/ERN PIMA 30 30 0 0 W15
TOHONO O'ODHAM 0 0 0 0
WESTERN PIMA 0 0 0 0
SOUTHEAST PINAL 10 0 0 0 W10
SANTA CRUZ 30 30 0 0 W10
SYNOPSIS...
INFLUX OF MOISTURE AND INSTABILITY FROM NORTHERN MEXICO OVERNIGHT
ADDED TO WHAT WAS HERE HAS INCREASED THE CHANCE OF THUNDERSTORMS
TODAY AND THIS EVENING THROUGH ESPECIALLY COCHISE...SANTA CRUZ
AND EASTERN PIMA COUNTIES. SOME STORMS THIS AFTERNOON WILL HAVE
THE POTENTIAL TO GENERATE SEVERE WEATHER WITH STRONG GUSTY WINDS.
RAINFALL AMOUNTS SHOULD GENERALLY BE A TENTH OF AN INCH OR LESS
FROM ANY GIVEN STORM.
*****************************************************************
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 FROM 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 OFN SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES.
END/WJMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 12:45 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 65 min |
| Jul 7, 1:44 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 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.