Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 97, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 4, 1997, 2:44 PM MST for Pima County, Arizona. It was in force for 91 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
- Sep 4, 1997, 2:44 PM MST (21:44 UTC)
- Expired
- Sep 4, 1997, 4:15 PM MST
- In force
- 91 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 9.7 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
- 69 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 2446 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- 1 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 042146 RRA SVRTUS AZC019-042315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 244 PM MST THU SEP 4 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 ...CENTRAL AND WESTERN PIMA COUNTY AT 238 PM MST...DOPPLER RADAR INDICATED A PAIR OF SEVERE THUNDERSTORMS...ONE 5 MILES NORTHWEST OF SELLS AND THE SECOND ONE 5 MILES NORTH OF ORGAN PIPE NATIONAL MONUMENT. MOVEMENT OF THESE STORMS IS TO THE NORTHWEST AROUND 5 TO 10 MPH. THESE STORMS ARE CAPABLE OF PRODUCING WIND GUSTS IN EXCESS OF 60 MPH...BRIEF HEAVY RAIN. LOCAL AREAS OF BLOWING DUST IS LIKELY ON HIGHWAY 85 BETWEEN AJO AND LUKEVILLE AND ALSO ON HIGHWAY 86 NORTHWEST OF SELLS. GLUECK/TOWLE
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 Sep 4, 2:30 PM MST, 14 minutes earlier.
Area forecast discussion, Sep 4, 2:30 PM MST, 14 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST THU SEP 4 1997 ISOLD TSTMS DVLPG ACRS PARTS OF CWFA THIS AFTN..MNLY W OF TUS WHERE THE DEEPEST MSTR IS AT..BUT NOT AS IMPRSV AS I THOUGHT THEY WOULD BE EARLIER THIS MRNG ACRS ERN ZONES. BUT TIME WL TELL. SEEMS THAT ERN ZONES STILL FIGHTING WITH DRY LOW-LVLS ALTHO THEY ARE MORE MOIST THAN PAST SVRL DAYS. ALL SIGNS THOU POINT TO AN INCR IN ACTVTY..ESPCLY E OF TUS..WHICH HAS BEEN RATHER CVNTN FREE PAST 3-4 DAYS. DEFINETELY TWO DIFFERENT THREATS TO DEAL WITH TNGT. PW VALUES W OF TUS(LOOKING AT YUM/PHX 12Z SNDGS) ABT 50% MORE THAN FM TUS E (LOOKING AT 12Z TUS/EPZ SNDGS). STGST STORMS AS OF 2130Z IS W OF TUS WHERE THE DEEPEST MSTR IS AT. SOMEWHAT DRIER AMS FM TUS E...WITH INVERTED-V SNDG LIKELY ON 00Z RELEASE WITH POTENTIAL FOR DAMAGING DOWNBURSTS WINDS. LCLY HVY RNFL THE MAIN CULPRIT W OF TUS. WL WORD ZNS THIS WAY. 12Z H5 PLOT SHOWS COOL POOL ACRS MOST OF NM..WHICH MAY MOVE WWD INTO ERN AZ TNGT THUS DSTBLZG AMS EVEN FURTHER. FAIRLY DEEP E-SELY WL ALLOW TSTMS TO PROPAGATE WWD..BUT HOW FAR WEST? WL KP ACTVTY GOING WRN ZN26 TIL THE EARLY MRNG HRS. WL GO WITH STANDARD MONSOON FCSTS FRI/SAT WITH TEMPS A TAD COOLR DUE TO MORE CLDS/MSTR. TUS 4232. GLUECK TUS...NONE
In the hours before
Special weather statement, Sep 4, 11:47 AM MST, 2 hours 57 minutes before
AZZ019-026>030-042300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST THU SEP 4 1997...THIS PRODUCT IS NOT UPDATED
...MODERATE RISK FOR SEVERE THUNDERSTORMS IN EASTERN COUNTIES
THIS AFTERNOON AND EVENING...
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 30 50 30 0 W 15
GRAHAM 30 50 30 0 NW 15
GREENLEE 35 40 30 0 W 12
TUCSON/ERN PIMA 25 50 25 0 NW 15
TOHONO OODHAM 30 35 45 15 NW 12
WESTERN PIMA 25 25 40 15 NW 12
SOUTHEAST PINAL 25 35 35 10 NW 15
SANTA CRUZ 30 50 30 10 NW 15
SYNOPSIS...A SLOW INCREASE IN MOISTURE FROM THE EAST WILL LEAD
TO AN INCREASE IN THUNDERSTORMS FOR EASTERN AREAS TODAY. SOME OF
THESE STORMS WILL BECOME QUITE STRONG WITH THE POTENTIAL FOR
DAMAGING WINDS AND HAIL. RAINFALL AMOUNTS WILL NOT BE AS MUCH OF
A PROBLEM WITH TOTALS GENERALLY REMAINING BELOW .75 OF AN INCH.
SOME THUNDERSTORMS WILL ALSO BE NOTED IN WESTERN PORTIONS
TODAY...AND WHILE THESE STORMS ARE NOT EXPECTED TO BE QUITE AS
STRONG ON THE WHOLE...THEY MAY HAVE A LITTLE MORE RAINFALL
ASSOCIATED WITH THEM.
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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/GLUECKNearby
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.