Alert archive / Arizona / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 58, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 9, 1998, 5:40 PM MST for Cochise County, Pima County, Arizona. It was in force for 45 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 9, 1998, 5:40 PM MST (00:40 UTC)
- Expired
- Aug 9, 1998, 6:25 PM MST
- In force
- 45 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
Counties Cochise County, AZ, Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 0.7 hours before the alert went out and 24 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
- 1180 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 2132 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 61 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 9, 2:30 PM MST, 3 hours 10 minutes earlier.
Area forecast discussion, Aug 9, 2:30 PM MST, 3 hours 10 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST SUN AUG 9 1998 SYNOPSIS...THUNDERSTORM ACTIVITY WILL INCREASE THE NEXT FEW DAYS AS MOISYURE FROM FORMER TROPICAL STORM FRANK MOVES INTO ARIZONA. DISCUSSION...STORMS DEVELOPING IN MTNS THAT CLEARED FIRST. LUKS LIKE WE HAVE TWO CHANCES OF GETTING PRECIP. FIRST WILL BE WITH STORMS DEVELOPING LOCALLY THIS AFTN. SECOND WILL BE IF COMPLEX DEVELOPS DOWN IN MEX TONIGHT AND MOVES NORTHWARD. POTENTIAL IS ABOUT THE SAME WITH EITHER SCENARIO. ALMOST TROPICAL AIRMASS SO SEVERE THREAT MINIMAL BUT HEAVY PRECIP THREAT STILL THERE. HAVE DECIDED TO HOLD OFF ON ANY WATCHES IN CWA...JUST NEED TO HAVE MORE CONFIDENCE IN HOW T HIS IS GOING TO PLAY OUT. TREND SHOULD BE DECREAING THROUGH TUE BUT STILL IN A WET PERIOD FOR THE WEEK. TUS 5444. HOLBROOK .TWC...NONE.
In the hours before
Special weather statement, Aug 9, 12:45 PM MST, 4 hours 55 minutes before
AZZ019-029>035-100700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1245 PM MST SUN AUG 9 1998...THIS PRODUCT IS NOT UPDATED
*CONDITIONAL* *CONDITIONAL*
AREAL PROBABILITY RAIN GREATER THAN STORM
COUNTY COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 30 10 10 5 NW 10
GRAHAM 30 10 10 5 N 10
GREENLEE 50 10 15 10 N 10
TUCSON/ERN PIMA 50 5 30 20 NW 15
TOHONO OODHAM 60 5 60 20 NW 15
WESTERN PIMA 70 5 80 30 NW 20
SOUTHEAST PINAL 50 5 30 15 NW 15
SANTA CRUZ 60 5 45 20 NW 15
SYNOPSIS...MOISTURE FROM FORMER TROPICAL STORM FRANK WILL MOVE INTO
SOUTHERN ARIZONA TODAY. THUNDERSTORMS WILL BE NUMEROUS WEST TO
SCATTERED FAR EAST. SEVERE THREAT DIMINISHED DUE TO TROPICAL
CHARACTERISTICS OF ATMOSPHERE.
*****************************************************************
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 12:45 PM 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. CORRESPONDING GRAPHICS MAY BE FOUND ON THE NWS
TUCSON INTERNET PAGE AT
HTTP://NIMBO.WRH.NOAA.GOV/TUCSON/SWO/SWO.SHTML
END/VPHSpecial weather statement, Aug 9, 12:45 PM MST, 4 hours 55 minutes before
AZZ019-029>035-100700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1245 PM MST SUN AUG 9 1998...THIS PRODUCT IS NOT UPDATED
*CONDITIONAL* *CONDITIONAL*
AREAL PROBABILITY RAIN GREATER THAN STORM
COUNTY COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 30 10 10 5 NW 10
GRAHAM 30 10 10 5 N 10
GREENLEE 50 10 15 10 N 10
TUCSON/ERN PIMA 50 5 30 20 NW 15
TOHONO OODHAM 60 5 60 20 NW 15
WESTERN PIMA 70 5 80 30 NW 20
SOUTHEAST PINAL 50 5 30 15 NW 15
SANTA CRUZ 60 5 45 20 NW 15
SYNOPSIS...MOISTURE FROM FORMER TROPICAL STORM FRANK WILL MOVE INTO
SOUTHERN ARIZONA TODAY. THUNDERSTORMS WILL BE NUMEROUS WEST TO
SCATTERED FAR EAST. SEVERE THREAT DIMINISHED DUE TO TROPICAL
CHARACTERISTICS OF ATMOSPHERE.
*****************************************************************
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 12:45 PM 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. CORRESPONDING GRAPHICS MAY BE FOUND ON THE NWS
TUCSON INTERNET PAGE AT
HTTP://NIMBO.WRH.NOAA.GOV/TUCSON/SWO/SWO.SHTML
END/VPHThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:26 PM MST | Severe Thunderstorm Warning | TWC | Pima | 49 min |
| Aug 9, 7:14 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Aug 9, 7:31 PM MST | Flash Flood Warning | TWC | Pima | 94 min |
| Aug 10, 3:21 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 49 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1998Every severe thunderstorm warning in 1998
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.