Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 92, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 29, 1997, 4:57 PM MST for Greenlee 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
- Aug 29, 1997, 4:57 PM MST (23:57 UTC)
- Expired
- Aug 29, 1997, 5:45 PM MST
- In force
- 48 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Greenlee County, AZ
The radar
The Tucson radar (KEMX), 196 km from the middle of the area, began a volume at 23:57 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, 12.0 hours before the alert went out and 194 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
- 110 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 1900 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 62 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 292357 RRA SVRTUS AZC011-300045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 457 PM MST FRI AUG 29 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEASTERN ARIZONA ...NORTHERN GREENLEE COUNTY AT 455 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 14 MILES NORTH OF MORENCI MOjVING SOUTHWEST AT 5 MPH. THIS STORM WAS ALONG U.S. HIGHWAY 191 WITH POSSIBLE WIND GUSTS TO 60 MPH...3/4 INCH DIAMETER HAIL AND LOCALLY HEAVY RAIN. OKULSKI
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 29, 2:30 PM MST, 2 hours 27 minutes earlier.
Area forecast discussion, Aug 29, 2:30 PM MST, 2 hours 27 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST FRI AUG 29 1997 TODAY IS GOING LIKE EXPECTED WITH DOWN DAY ACROSS MOST OF AREA. STILL HAVE NOT SEEN BIG STORMS IN ERN ZONES EXCEPT FOR WHITES AND MSTR MAY BE TO MEAGER THERE TO GET ANY TODAY. BUT BETTER THERE THAN WEST AND WILL LEAVE POPS ALONE THO BACK OFF ON HEAVY RAIN WORDING. WITH SURGE ONGOING EXPECT SAT TO BE GOOD DAY...UPR LOW WEST OF SRN TIP OF BAJA WILL STILL PLACE SE AZ AND NRN MEX IN ZONE OF UPR LVL DIVERGENCE AND HEATING WILL BE GOOD. HAD SOME CONCERN THAT ANY STORMS DEVELOPING IN MEX TONIGHT WOULD MOVE INTO THIS AREA LATE BUT JUST LUKS TOO STABLE THERE TODAY. AS TO THE UPR LOW...ITS SITTING OVR WARM WATER AND MAY WARM FROM BELOW WITH CONVECTION. MAY ACQUIRE SOME TROPICAL CHARACTERISTICS OVR THE WEEKEND. STILL EVEN IF IT DID DEVELOP SYNPOTIC FLOW IS MUCH MORE IMPORTANT. MONSOON PATTERN STAYS WITH US THRU NEXT WEEK. TUS 2442. HOLBROOK TUS...NONE
In the hours before
Special weather statement, Aug 29, 11:45 AM MST, 5 hours 12 minutes before
AZZ019-026>030-292300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST FRI AUG 29 1997...THIS PRODUCT IS NOT UPDATED
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 50 30 40 15 NW 12
GRAHAM 30 20 30 10 NW 12
GREENLEE 40 25 20 10 NW 12
TUCSON/ERN PIMA 20 15 25 15 NW 12
TOHONO OODHAM 15 10 25 15 N 10
WESTERN PIMA 15 10 25 10 N 10
SOUTHEAST PINAL 15 10 25 10 NW 12
SANTA CRUZ 30 20 30 20 NW 12
SYNOPSIS...A RAIN COOLED LOWER ATMOSPHERE IS EXPECTED TO HELP
STABILIZE THE AIRMASS AND RETARD THUNDERSTORMS TODAY OVER WESTERN
PORTIONS OF THE AREA WHILE EASTERN ZONES WILL SEE AN INCREASE IN
ACTIVITY. SEVERE STORMS WITH HEAVY RAINFALL AND LOCALIZED
FLOODING IS A CONCERN IN THE AREA FROM SIERRA VISTA TO WILLCOX TO
DOUGLAS.
*****************************************************************
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/HOLBROOKThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 5:00 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Aug 28, 5:00 PM MST | Severe Thunderstorm Warning | TWC | Pima | 2 hr |
| Aug 28, 5:58 PM MST | Flash Flood Warning | TWC | Pima | 92 min |
| Aug 28, 5:58 PM MST | Severe Thunderstorm Warning | TWC | Pima | 92 min |
| Aug 28, 7:29 PM MST | Flash Flood Warning | TWC | Pima | 91 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.