Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 31, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 1, 1997, 1:49 PM MST for Cochise County, Arizona. It was in force for 61 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 1, 1997, 1:49 PM MST (20:49 UTC)
- Expired
- Aug 1, 1997, 2:50 PM MST
- In force
- 61 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 20:52 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, 8.8 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
- 470 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 2151 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 8 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 012050 RRA SVRTUS AZC003-012150- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 149 PM MST FRI AUG 1 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 250 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEASTERN ARIZONA ...CENTRAL COCHISE COUNTY AT 147 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES NORTH NORTHEAST OF ELFRIDA APPROACHING HWY 191. ANOTHER STORM WAS ABOUT 10 MILES FARTHER NORTH APPRAOCHING HWY 181. THE STORMS WERE MOVING NORTHWEST AT 10 MPH. THIS STORM MAY PRODUCE WIND SPEEDS IN EXCESS OF 60 MPH...DANGEROUS LIGHTNING AND VERY HEAVY RAINFALL.
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 1, 9:28 AM MST, 4 hours 21 minutes earlier.
Area forecast discussion, Aug 1, 9:28 AM MST, 4 hours 21 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 830 AM MST FRI AUG 1 1997 12Z TUS SOUNDING SHOWING WARMING AT LOW AND MID LEVELS AND COOLING AT UPPER LEVELS...GOOD FOR SOME DESTABILIZATION. CONSIDERABLE MOISTURE INCREASE IN THE PAST 24 HOURS AT MID AND UPPER LEVELS AND SOME AT LOW LEVELS. K INDEX A BIG 40 AND PRECIP WATER UP TO 1.3 INCHES. WITH MOISTURE AS DEEP AS 500 MB...EXPECT LESS MIXING THIS AFTERNOON WITH DEW POINTS PROBABLY DROPPING TO MID 50S. THIS POINTS TO A MORE ACTIVE DAY THAN YESTERDAY WITH SOME HEAVY RAIN POTENTIAL. BUT SOUNDING DOES HAVE A SIGNIFICANT INVERSION ABOVE 500 MB TO OVERCOME. SHEAR PROFILE NOT THE BEST FOR TSTM ORGANIZATION...BUT AT LEAST THERE IS NO 50 KT WIND TO BLOW THE TOPS OFF. MORNING PLOT FILES SHOWING MORE WESTWARD MOVEMENT OF THE UPPER HIGH WITH A 595 500 MB HEIGHT OVER ABQ...AND A 700 MB HIGH CENTER NEAR THE 4 CORNERS. WELL DEFINED ELY WAVE OVER SRN GULFCA. TUS 343. TUS...NONE
In the hours before
Special weather statement, Aug 1, 11:47 AM MST, 2 hours 2 minutes before
AZZ019-026>030-012300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST FRI AUG 1 1997...THIS PRODUCT IS NOT UPDATED.
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 40 20 20 10 NW 15
GRAHAM 40 20 20 10 NW 15
GREENLEE 40 10 20 10 NW 15
TUCSON/ERN PIMA 40 10 20 10 NW 15
TOHONO OODHAM 30 10 10 10 NW 15
WESTERN PIMA 30 10 10 10 NW 15
SOUTHEAST PINAL 30 10 15 10 NW 15
SANTA CRUZ 40 20 20 10 NW 15
SYNOPSIS...
OUTFLOWS FROM LAST NIGHTS THUNDERSTORMS HAVE INCREASED AND
DEEPENED THE MOISTURE OVER THE AREA. THE ATMOSPHERE IS ALSO MORE
UNSTABLE THAN YESTERDAY. THE POTENTIAL FOR BOTH MOUNTAIN AND
VALLEY THUNDERSTORMS IS BETTER THAN YESTERDAY. BRIEF HEAVY RAINS
CAN BE EXPECTED WITH THESE STORMS. A FEW STORMS MAY PRODUCE
RAINFALL ACCUMULATIONS OVER 1.00 INCH.
*****************************************************************
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/The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 3:15 PM MST | Flash Flood Warning | TWC | Cochise | 65 min |
| Aug 1, 4:49 PM MST | Flash Flood Warning | TWC | Pima | 61 min |
| Aug 1, 4:49 PM MST | Severe Thunderstorm Warning | TWC | Pima | 61 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.