Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 32, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 1, 1997, 4:49 PM MST for Pima 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, 4:49 PM MST (23:49 UTC)
- Expired
- Aug 1, 1997, 5:50 PM MST
- In force
- 61 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 23:51 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, 11.8 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
- 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 2:30 PM MST, 2 hours 19 minutes earlier.
Area forecast discussion, Aug 1, 2:30 PM MST, 2 hours 19 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST FRI AUG 1 1997 TSTMS BEGAN SHORTLY BEFORE NOON IN COCHISE COUNTY WHERE THE LOW LEVEL MOISTURE WAS THE GREATEST. DEVELOPMENT WAS MUCH MORE RAPID THAN YESTERDAY WITH ECHO TOPS UP TO 54K FT. HAVE HAD ONE SPOTTER REPORT OF 1.5 INCH OF RAIN. ETA SHOWING POTENTIAL FOR CONVECTIVE COMPLEX OVER NWRN MEXICO TO POSSIBLY ADD MORE LOW LEVEL MOISTURE TONIGHT. MM5 INCREASING PRECIP WATER TO 1.5 INCHES TONIGHT. MODELS CONTINUING TO MOVE UPPER HIGH WESTWARD TO CO BY SUN. WITH SELY FLOW...MOISTURE AT 700 AND 500 MB TO MAINTAIN OR INCREASE. MOVEMENT OF HIGH CENTER MAY PRODUCE WIND PROFILE MORE FAVORABLE TO SEVERE WEATHER...BUT THAT IS TOO FAR AHEAD. ETA KEEPS RELATIVLY DRIER AIR OVER FAR SW AZ FOR A VERY STRONG MOISTURE GRADIENT THAT AREA ON SAT. WILL THIS BE A FOCUSING MECHANISM... TUS 4343 TUS...NONE
In the hours before
Special weather statement, Aug 1, 11:47 AM MST, 5 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/Special weather statement, Aug 1, 2:49 PM MST, 2 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 249 PM MST FRI AUG 1 1997 AZZ028-020355- ...DUST DEVILS NEAR GREEN VALLEY... A FEW STRONG DUST DEVILS ARE OCCURING SOUTH OF TUCSON IN THE GREEN VALLEY AREA. DUST DEVILS ARE CAPABLE OF WINDS TO 40 MPH. EXPECT BLOWING DUST AND FLYING DEBRIS NEAR THESE DUST DEVILS.
Special weather statement, Aug 1, 2:50 PM MST, 1 hour 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 249 PM MST FRI AUG 1 1997 AZZ028-020355- ...DUST DEVILS NEAR GREEN VALLEY... A FEW STRONG DUST DEVILS ARE OCCURING SOUTH OF TUCSON IN THDE GREEN VALLEY AREA. DUST DEVILS ARE CAPABLE OF WINDS TO 40 MPH. EXPECT BLOWING DUST AND FLYING DEBRIS NEAR THESE DUST DEVILS.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 1:49 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 61 min |
| 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 |
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.