Alert archive / Arizona / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 6, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 1, 1998, 4:00 PM MST for Greenlee County, Arizona. It was in force for 50 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
- Jul 1, 1998, 4:00 PM MST (23:00 UTC)
- Expired
- Jul 1, 1998, 4:50 PM MST
- In force
- 50 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Greenlee County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 11.0 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 4463 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
978 WUUS1 KTUS 012302 SVRTUS AZC011-012350- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 400 PM MST WED JUL 1 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN GREENLEE COUNTY IN SOUTHEASTERN ARIZONA * UNTIL 450 PM MST * AT 358 PM MST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR SHELDON MOVING NORTH-NORTHEAST AT 5 MPH. THIS SEVERE THUNDERSTORM WILL BE AFFECTING THE SHELDON AREAS THROUGH 430 PM. JRG
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 1, 2:30 PM MST, 1 hour 30 minutes earlier.
Area forecast discussion, Jul 1, 2:30 PM MST, 1 hour 30 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST WED JUL 1 1998 SYNOPSIS...A LOW PRESSURE SYSTEM IN MEXICO HAS INJECTED SOME MOISTURE INTO FAR SOUTHEAST ARIZONA. A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS WILL CONTINUE OVER FAR SOUTHEAST ARIZONA THROUGH FRIDAY. ELSEWHERE SKIES WILL REMAIN MOSTLY SUNNY. DISCUSSION...BIG BEND WAVE AND EASTERLY WINDS IN NEW MEXICO HAS PUSHED MOISTURE INTO FAR SOUTHEASTERN ARIZONA. SURFACE DEW POINTS AT DOUGLAS AND SAFFORD HAVE RISEN TO MID-UPPER 40S AND PRECIPITABLE WATER VALUES IN WESTERN NEW MEXICO AROUND 1 INCH. HEALTHY THUNDERSTORMS HAVE DEVELOPED IN EASTERN COCHISE COUNTY. A LINE OF THUNDERSTORMS IN WESTERN NEW MEXICO MAY PRODUCE OUTFLOWS LATER ON FOR SLIGHT CHANCE THROUGH THIS EVENING. CLEAR ELSEWHERE. THURSDAY...WAVE MOVES SLIGHTLY WEST WITH EASTERLY WIND FLOW INTO FAR SOUTHEAST AGAIN. MODELS MAINTAIN MOISTURE AT 850 AND 700 MB. SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS IN GRAHAM...COCHISE AND GREENLEE COUNTIES. FRIDAY...PACIFIC TROUGH MOVES INTO CALFORNIA. LOW LEVEL WIND FLOW BECOMES WEST OR LIGHT. MAY BE ENOUGH MOISTURE STILL AROUND FOR SLIGHT CHANCE OF THUNDERSTORMS IN COCHISE COUNTY. BUT ELSEWHERE WESTERLY WINDS WILL KEEP THE ATMOSPHERE DRY. TUS 000. .TWC...NONE.
In the hours before
Special weather statement, Jul 1, 12:45 PM MST, 3 hours 15 minutes before
AZZ019-026>030-020700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1245 PM MST WED JUL 01 1998...THIS PRODUCT IS NOT UPDATED
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 10 0 10 5
GRAHAM 10 0 10 5
GREENLEE 10 0 10 5
TUCSON/ERN PIMA 0 0 0 0
TOHONO O'ODHAM 0 0 0 0
WESTERN PIMA 0 0 0 0
SOUTHEAST PINAL 0 0 0 0
SANTA CRUZ 0 0 0 0
SYNOPSIS...
SOME MOISTURE HAS MOVED INTO FAR SOUTHEASTERN ARIZONA FROM NEW
MEXICO. A SLIGHT CHANCE OF MOUNTAIN THUNDERSTORMS IS POSSIBLE IN
GRAHAM...GREENLEE AND COCHISE COUNTIES. LITTLE OR NO PRECIPITATION
IS EXPECTED.
*****************************************************************
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/hSWO/SWO.SHTML
END/Special weather statement, Jul 1, 12:45 PM MST, 3 hours 15 minutes before
AZZ019-026>030-020700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1245 PM MST WED JUL 01 1998...THIS PRODUCT IS NOT UPDATED
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 10 0 10 5
GRAHAM 10 0 10 5
GREENLEE 10 0 10 5
TUCSON/ERN PIMA 0 0 0 0
TOHONO O'ODHAM 0 0 0 0
WESTERN PIMA 0 0 0 0
SOUTHEAST PINAL 0 0 0 0
SANTA CRUZ 0 0 0 0
SYNOPSIS...
SOME MOISTURE HAS MOVED INTO FAR SOUTHEASTERN ARIZONA FROM NEW
MEXICO. A SLIGHT CHANCE OF MOUNTAIN THUNDERSTORMS IS POSSIBLE IN
GRAHAM...GREENLEE AND COCHISE COUNTIES. LITTLE OR NO PRECIPITATION
IS EXPECTED.
*****************************************************************
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/hSWO/SWO.SHTML
END/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.