Alert archive / Arizona / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 33, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 22, 1998, 2:43 PM MST for Graham County, Greenlee County, Arizona. It was in force for 62 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 22, 1998, 2:43 PM MST (21:43 UTC)
- Expired
- Jul 22, 1998, 3:45 PM MST
- In force
- 62 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
Counties Graham County, AZ, Greenlee County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 9.7 hours before the alert went out and 161 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
- 844 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1063 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
088 WUUS1 KTUS 222145 RRA SVRTUS AZC009-011-222245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 243 PM MST WED JUL 22 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN GRAHAM COUNTY IN SOUTHEASTERN ARIZONA SOUTHERN GREENLEE COUNTY IN SOUTHEASTERN ARIZONA * UNTIL 345 PM MST * AT 250 PM MST... DOPPLER RADAR INDICATED AN AREA OF SEVERE THUNDERSTORMS NEAR GUTHRIE. * THE SEVERE THUNDERSTORMS WILL BE LOCATED FROM GUTHRIE SOUTHWARD. THESE STORMS ARE MOVING TO THE WEST AT 10 MPH. THE MAIN THREAT FROM THESE STORMS IS LARGE HAIL ABOUT 1.0 INCH IN DIAMETER. MCCOLLUM
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 22, 2:30 PM MST, 13 minutes earlier.
Area forecast discussion, Jul 22, 2:30 PM MST, 13 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST WED JUL 22 1998 SYNOPSIS...SUBTROPICAL WEATHER DISTURBANCES MOVING NORTH AND WEST INTO SOUTHERN ARIZONA WILL CONTINUE TO SPREAD SHOWERS THUNDERSTORMS WITH HEAVY RAIN ACROSS PARTS OF SOUTHEAST ARIZONA INTO TONIGHT. HIGH PRESSURE WILL SLOWLY DRIFT EASTWARD TOWARD THE TEXAS PANHANDLE THIS WEEKEND. A MOIST MONSOONAL FLOW TO PERSIST WITH SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. DISCUSSION...AN EXTREMELY WET AIRMASS IS IN PLACE ACROSS MOST OF SOUTHEAST ARIZONA. THE REGION IS CAUGHT IN A "SQUEEZE PLAY" BETWEEN INVERTED TROUGHS MOVING IN FROM THE SOUTH AND EAST. WIDESPREAD CONVECTION OVER THIS MORNINGS FLASH FLOOD WATCH AREA HAS TURNED TO LIGHT TO MODERATE STRATIFORM RAIN. NEW CONVECTION CONTINUES TO DEVELOP ON THE EDGES OF THE STRATIFORM BAND. WILL HAVE TO WATCH THESE AREAS FOR ADDITIONAL FLOODING POTENTIAL INTO THE EVENING HOURS. NORMALLY ONE WOULD CONSIDER THE REST OF TONIGHT AND PROBABLY THURSDAY A DOWN PERIOD DUE TO TODAYS CONVECTION. HOWEVER THERE ARE PROBABLY MINOR DISTURBANCES IN THE SOUTHEAST FLOW ALOFT AND IT WILL NOT TAKE MUCH CLEARING IN THIS VERY MOIST AIRMASS TO FIRE UP NEW STORMS. THE ETA MODEL SHOWS ANOTHER INVERTED TROUGH MOVING INTO SOUTHERN NEW MEXICO THURSDAY MORNING. THEREFORE WILL NOT FOLLOW THE USUAL DIURNAL CYCLE THROUGH MOST OF THE SHORT TERM PERIOD. THE HIGH ALOFT DRIFTS GRADUALLY EASTWARD TOWAvRD THE TEXAS PANHANDLE THIS WEEKEND. THE ACTIVE MONSOON PATTERN CONTINUES...WITH PERHAPS A TREND TOWARD WARMER TEMPERATURES AND A MORE DIURNAL CONVECTIVE CYCLE. TUS 6544. OKULSKI .TWC...FLASH FLOOD WATCH ZONE 31 UNTIL 10 PM MST.
In the hours before
Special weather statement, Jul 22, 11:37 AM MST, 3 hours 6 minutes before
AZZ019-029>035-230700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1245 PM MST WED JUL 22 1998...THIS PRODUCT IS NOT UPDATED
*CONDITIONAL* *CONDITIONAL*
AREAL PROBABILITY RAIN GREATER THAN STORM
COUNTY COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 75 10 85 45 NW 5
GRAHAM 65 10 75 35 NW 5
GREENLEE 60 15 60 25 NW 5
TUCSON/ERN PIMA 80 10 85 45 NW 5
TOHONO OODHAM 80 10 85 45 NW 5
WESTERN PIMA 40 15 50 25 NW 5
SOUTHEAST PINAL 80 10 85 45 NW 5
SANTA CRUZ 80 10 90 50 NW 5
SYNOPSIS...***HEAVY RAIN LIKELY THROUGH TONIGHT***
AN AREA OF ORGANIZED SHOWERS AND THUNDERSTORMS WILL PERSIST FROM
NORTHERN SONORA MEXICO NORTHWESTWARD INTO SOUTHERN PINAL COUNTY.
THESE STORMS WILL CONTINUE TO PRODUCE HEAVY RAINFALL AMOUNTS IN THIS
AREA...INCLUDING THE TUCSON METROPOLITAN AREA. ONE INCH RAINFALL
AMOUNTS ARE LIKELY NEAR STORMS WITH AMOUNTS IN EXCESS OF TWO INCHES
NOT UNCOMMON. ADDITIONAL THUNDERSTORM DEVELOPMENT IS LIKELY THROUGH
TONIGHT IN THE VERY MOIST AIRMASS IN PLACE...PARTICULARLY FOR
PORTIONS OF COCHISE AND GRAHAM COUNTIES UNAFFECTED BY EARLIER
CONVECTION.
*****************************************************************
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/RJOThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 5:30 AM MST | Flash Flood Warning | TWC | Pinal | 3 hr |
| Jul 22, 9:16 AM MST | Flash Flood Warning | TWC | Pima, Pinal | 3 hr |
| Jul 22, 9:47 AM MST | Flash Flood Warning | TWC | Santa Cruz | 3 hr |
| Jul 22, 3:45 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 50 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.