Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 25, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 9, 1997, 2:16 PM MST for Pima County, Arizona. It was in force for 49 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 9, 1997, 2:16 PM MST (21:16 UTC)
- Expired
- Jul 9, 1997, 3:05 PM MST
- In force
- 49 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 21:15 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 3:00 PM MST | Thunderstorm Wind 60 | San Xavier, AZ | Thunderstorm winds were estimated to 60 mph. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 9.3 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
- 18 J/kg
- Mixed-layer CIN
- -333 J/kg
- Mixed-layer LCL
- 3368 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 17 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 092118 RRA SVRTUS AZC019-092205- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 216 PM MST WED JUL 9 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 SOUTHERN ARIZONA ...EASTERN PIMA COUNTY AT 214 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES SOUTH SOUTHWEST OF SOUTHWEST nTUCSON OR 7 MILES NORTHWEST OF SAHUARITA MOVING NORTH NORTHEAST AT 10 MPH. MEYER
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 Jul 9, 9:30 AM MST, 4 hours 46 minutes earlier.
Area forecast discussion, Jul 9, 9:30 AM MST, 4 hours 46 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 930 AM MST WED JUL 9 1997 LOW LVLS IN DESERT HAVE SHOW MORE MSTR SINCE TUE. GBN IS UP 6C AND YUM IS UP 3C. YUM ALSO SHOWING SSE WNDS THROUGH 16K AND THIS MAY PROMPT MORE SRLY FLOW IN CNTRL AND ERN AZ DURG THE DAY TODAY. SAT DATA SHOWS H8 DEWPOINTS UP SOME BUT NOT AS MUCH AS SFC. SEEMS THAT WE HAVE HAD SOME LOW LVL MSTR WORK INTO THE DESERT FROM TSTMS OR UP GULF OF CA. STILL NOT ENUF MSTR TO GET TSTMS TOO FAR OFF THE MTNS YET BUT WITH SRLY FLOW ALOFT THERE IS A THREAT OF GETTING STORMS INTO THE VALLEYS. HOLDING ONLY A 40 DEWPOINT THIS AFTN GIVES US A CAPE OVR 1000. THE THREAT FOR STORMS SEEMS TO BE BEST FROM CGZ TO SELLS AND EAST. H2 SHOWS SOME DIVERGENCE ALSO. COLD AIR ALOFT AND INVERTED V SOUNDINGS POINT TO BOTH DOWNBURST AND SMALL HAIL EVENT. MODELS BEGIN PUSHING UPR LOW EWD TONIGHT. THIS WILL ALSO KEEP STORMS GOING WELL INTO THE NIGHT. NEW MODEL RUN ALSO DRYS US OUT AS THIS SYSTEM MOVES NEWD OUT OF AREA AND TROF TO THE NORTH INCREASES SWRLY FLOW. SO THERE MAY BE A DOWN TREND IN THE MONSOON FRI AND SAT. EVERYTHING IS KIND OF IFFY SO WONT CHANGE PRESENT FCST AND WILL WATCH TRENDS DURING THE DAY. TUS 002. HOLBROOK TUS...NONE
In the hours before
Special weather statement, Jul 9, 11:45 AM MST, 2 hours 31 minutes before
AZZ019-026>030-100700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST WED JUL 9 1997
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 25 0 0 0 N10
GRAHAM 20 0 0 0 N10
GREENLEE 20 0 0 0 N10
TUCSON/ERN PIMA 20 10 0 0 N10
TOHONO OODHAM 25 10 0 0 N15
WESTERN PIMA 25 10 0 0 N15
SOUTHEAST PINAL 15 10 0 0 N10
SANTA CRUZ 30 10 0 0 N10
SYNOPSIS...
LOW LEVEL MOISTURE HAS MOVED INTO CENTRAL AND WESTERN PIMA COUNTY
FROM GULF OF CALIFORNIA. THIS MOISTURE COMBINED WITH COLD AIR
ALOFT ASSOCIATED WITH AN UPPER LEVEL LOW NEAR MEXICALI WILL
GENERATE THUNDERSTORMS OVER MOST OF SOUTHERN ARIZONA THIS
AFTERNOON. SOME THUNDERSTORMS MAY APPROACH SEVERE LEVELS AND ARE
CAPABLE OF PRODUCING STRONG WINDS AND SMALL HAIL. THUNDERSTORMS
MAY LINGER ACROSS THE AREA THROUGH ABOUT MIDNIGHT.
*****************************************************************
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 FROM 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/VPHSpecial weather statement, Jul 9, 11:59 AM MST, 2 hours 17 minutes before
AZZ019-026>030-100700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1200 AM MST WED JUL 9 1997
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 25 0 0 0 N10
GRAHAM 20 0 0 0 N10
GREENLEE 20 0 0 0 N10
TUCSON/ERN PIMA 20 10 0 0 N10
TOHONO O'ODHAM 25 10 0 0 N15
WESTERN PIMA 25 10 0 0 N15
SOUTHEAST PINAL 15 10 0 0 N10
SANTA CRUZ 30 10 0 0 N10
SYNOPSIS...
LOW LEVEL MOISTURE HAS MOVED INTO CENTRAL AND WESTERN PIMA COUNTY
FROM GULF OF CALIFORNIA. THIS MOISTURE COMBINED WITH COLD AIR
ALOFT ASSOCIATED WITH AN UPPER LEVEL LOW NEAR MEXICALI WILL
GENERATE THUNDERSTORMS OVER MOST OF SOUTHERN ARIZONA THIS
AFTERNOON. SOME THUNDERSTORMS MAY APPROACH SEVERE LEVELS AND ARE
CAPABLE OF PRODUCING STRONG WINDS AND SMALL HAIL. THUNDERSTORMS
MAY LINGER ACROSS THE AREA THROUGH ABOUT MIDNIGHT.
*****************************************************************
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 FROM 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 4USED IN PLACE OF SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES.
END/VPHSpecial weather statement, Jul 9, 12:00 PM MST, 2 hours 16 minutes before
AZZ019-026>030-100700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ...CORRECTION FOR STORM MOTION
1200 PM MST WED JUL 9 1997
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 25 0 0 0 S10
GRAHAM 20 0 0 0 S10
GREENLEE 20 0 0 0 S10
TUCSON/ERN PIMA 20 10 0 0 S10
TOHONO OODHAM 25 10 0 0 S15
WESTERN PIMA 25 10 0 0 S15
SOUTHEAST PINAL 15 10 0 0 S10
SANTA CRUZ 30 10 0 0 S10
SYNOPSIS...
LOW LEVEL MOISTURE HAS MOVED INTO CENTRAL AND WESTERN PIMA COUNTY
FROM GULF OF CALIFORNIA. THIS MOISTURE COMBINED WITH COLD AIR
ALOFT ASSOCIATED WITH AN UPPER LEVEL LOW NEAR MEXICALI WILL
GENERATE THUNDERSTORMS OVER MOST OF SOUTHERN ARIZONA THIS
AFTERNOON. SOME THUNDERSTORMS MAY APPROACH SEVERE LEVELS AND ARE
CAPABLE OF PRODUCING STRONG WINDS AND SMALL HAIL. THUNDERSTORMS
MAY LINGER ACROSS THE AREA THROUGH ABOUT MIDNIGHT.
*****************************************************************
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 FROM 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/VPHSpecial weather statement, Jul 9, 12:15 PM MST, 2 hours 1 minute before
AZZ019-026>030-100700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST WED JUL 9 1997
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 25 0 0 0 N10
GRAHAM 20 0 0 0 N10
GREENLEE 20 0 0 0 N10
TUCSON/ERN PIMA 20 10 0 0 N10
TOHONO O'ODHAM 25 10 0 0 N15
WESTERN PIMA 25 10 0 0 N15
SOUTHEAST PINAL 15 10 0 0 N10
SANTA CRUZ 30 10 0 0 N10
SYNOPSIS...
LOW LEVEL MOISTURE HAS MOVED INTO CENTRAL AND WESTERN PIMA COUNTY
FROM GULF OF CALIFORNIA. THIS MOISTURE COMBINED WITH COLD AIR
ALOFT ASSOCIATED WITH AN UPPER LEVEL LOW NEAR MEXICALI WILL
GENERATE THUNDERSTORMS OVER MOST OF SOUTHERN ARIZONA THIS
AFTERNOON. SOME THUNDERSTORMS MAY APPROACH SEVERE LEVELS AND ARE
CAPABLE OF PRODUCING STRONG WINDS AND SMALL HAIL. THUNDERSTORMS
MAY LINGER ACROSS THE AREA THROUGH ABOUT MIDNIGHT.
*****************************************************************
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 FROM 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/VPHSpecial weather statement, Jul 9, 12:26 PM MST, 1 hour 50 minutes before
AZZ019-026>030-100700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ...CORRECTION FOR STORM MOTION
1200 PM MST WED JUL 9 1997
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 25 0 0 0 S10
GRAHAM 20 0 0 0 S10
GREENLEE 20 0 0 0 S10
TUCSON/ERN PIMA 20 10 0 0 S10
TOHONO O'ODHAM 25 10 0 0 S15
WESTERN PIMA 25 10 0 0 S15
SOUTHEAST PINAL 15 10 0 0 S10
SANTA CRUZ 30 10 0 0 S10
SYNOPSIS...
LOW LEVEL MOISTURE HAS MOVED INTO CENTRAL AND WESTERN PIMA COUNTY
FROM GULF OF CALIFORNIA. THIS MOISTURE COMBINED WITH COLD AIR
ALOFT ASSOCIATED WITH AN UPPER LEVEL LOW NEAR MEXICALI WILL
GENERATE THUNDERSTORMS OVER MOST OF SOUTHERN ARIZONA THIS
AFTERNOON. SOME THUNDERSTORMS MAY APPROACH SEVERE LEVELS AND ARE
CAPABLE OF PRODUCING STRONG WINDS AND SMALL HAIL. THUNDERSTORMS
MAY LINGER ACROSS THE AREA THROUGH ABOUT MIDNIGHT.
*****************************************************************
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 FROM WHICH THE STORMS WILL
LIKELY MOVE AND SPEED IN MPH
NOTE...
VALID TIME IS FROM 12 NOON TO 12 MIDNIGHT OF THE DAY OF ISSUvANCE
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/VPHNearby
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.