Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 107, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 20, 1997, 2:17 PM MST for Cochise County, Arizona. It was in force for 48 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 20, 1997, 2:17 PM MST (21:17 UTC)
- Expired
- Sep 20, 1997, 3:05 PM MST
- In force
- 48 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 83 km from the middle of the area, began a volume at 21:20 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, 9.3 hours before the alert went out and 113 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
- 100 J/kg
- Mixed-layer CIN
- -309 J/kg
- Mixed-layer LCL
- 2339 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
741 WUUS1 KTUS 202118 RRA SVRTUS AZC003-202205- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 217 PM MST SAT SEP 20 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 305 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEASTERN ARIZONA ...NORTHWESTERN COCHISE COUNTY AT 215 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES NORTH NORTHWEST OF BENSON MOVING NORTHEAST AT 15 MPH. THIS IS A REMOTE AREA ON THE EAST SIDE OF THE RINCON MOUNTAINS.
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 20, 9:00 AM MST, 5 hours 17 minutes earlier.
Area forecast discussion, Sep 20, 9:00 AM MST, 5 hours 17 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 900 AM MST SAT SEP 20 1997 SHWRS AND ISOLD TSTMS CONT STREAMING UP THRU FAR SE COCHISE COUNTY. WK AREA OF CONVERGENCE PIVOTING INTO MORE POSITIVE TILT...SOME LWR LVL MANIFESTATION OF IT MAY BE ABLE SO SNEAK A LTL WWD TDA BFR INFLUENCE OF TROF IS MORE DOMINANT IN LOW LVLS. WE ARE ALSO SHOWING SOME COOLING ALREADY EVIDENT IN THE MID LVLS. STILL...BEST CHC OF TSTM ACTIVITY SHOULD REMAIN IN ERN ZNS FOR NOW. STGR SWLY FLOW DVLPG WITH TROF OVR GRT BASIN. FINAL REMAINS OF LINDA BEING DRAWN UP INTO LOW THRU SRN CA AND WRN/NRN AZ ATTM. TROF IS BEGINNING TO HELP ERN PAC AREAS SW OF AZ TO DRY OUT A BIT...BUT STILL A FEW POCKETS OF MSTR THERE BLO H7 AS PER GOES PW ESTIMATES. I LIKE MDL ADVERTISEMENT OF TIGHT MSTR GRAD ACRS ERN AZ...WITH DRY W OF TUS AND INCRG MSTR E OF TUS. BEST INFLUENCE OF TROF SHOULD REMAIN N OF US...BUT SOME PVA MOVG IN NXT TWO DAYS MAY INCR CHC TSTM ACTIVITY THRU OTHER PORTIONS OF OUR CWFA. THEN THERES NORA. NORA...NORA...NORA. NORA. CURRENT FCST REFLECTS ALL THE PREVIOUSLY MENTIONED STUFF PRETTY WELL. NO UPDATES PLANNED BUT IM NOT MAKING ANY PROMISES. TUS 223. MEYER TUS...NONE
In the hours before
Special weather statement, Sep 20, 11:26 AM MST, 2 hours 51 minutes before
AZZ019-026>030-202300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST SAT SEP 20 1997...THIS PRODUCT IS NOT UPDATED
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 35 20 35 0 NE 12
GRAHAM 30 20 30 0 NE 15
GREENLEE 40 20 30 0 NE 15
TUCSON/ERN PIMA 30 25 30 0 NE 15
TOHONO OODHAM 15 25 15 0 NE 18
WESTERN PIMA 10 30 15 0 NE 18
SOUTHEAST PINAL 20 25 25 0 NE 18
SANTA CRUZ 25 25 30 0 NE 15
SYNOPSIS...MOISTURE REMAINS SCARCE IN WESTERN AREAS TODAY WITH A
BETTER CHANCE OF THUNDERSTORMS AS YOU MOVE INTO EASTERN PORTIONS.
THE DIVIDING LINE APPEARS TO BE NEAR TUCSON. STRONG WINDS ALOFT WILL
KEEP STORMS MOVING FAIRLY RAPIDLY WITH INDIVIDUAL STORMS PRODUCING
LESS THAN .75 OF AN INCH...BUT TODAY LOOKS LIKE A DAY FOR SOME
TRAINING EFFECTS. THIS MEANS THAT IF YOU GET ONE STORM...YOU HAVE A
GOOD CHANCE TO GET MORE. TOTAL RAINFALL AMOUNTS COULD APPROACH AN
INCH OR MORE FROM MULTIPLE STORMS IN SOME LOCATIONS...GENERALLY FROM
TUCSON EASTWARD. WATCH FOR GUSTY WINDS.
*****************************************************************
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/MEYERThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 3:42 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 48 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.