Alert archive / Arizona / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 17, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 17, 1998, 8:09 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
- Jul 17, 1998, 8:09 PM MST (03:09 UTC)
- Expired
- Jul 17, 1998, 9:10 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 03:09 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 00:00Z, 3.2 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
- 979 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 3214 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
905 WUUS1 KTUS 180310 RRA SVRTUS AZC019-180410- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 809 PM MST FRI JUL 17 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL PIMA COUNTY IN SOUTHERN ARIZONA * UNTIL 910 PM MST * AT 806 PM MST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES SOUTHWEST OF SELLS MOVING SOUTHWEST AT 15 MPH. THIS STORM REMAINED CAPABLE OF PRODUCING 70 MPH WIND GUSTS...LARGE HAIL AND HEAVY RAIN. OKULSKI
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 17, 2:30 PM MST, 5 hours 39 minutes earlier.
Area forecast discussion, Jul 17, 2:30 PM MST, 5 hours 39 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST FRI JUL 17 1998 SYNOPSIS...AN EASTERLY AIRFLOW AROUND AN UPPER HIGH CENTERED OVER SOUTHERN NEVADA AND SOUTHWEST UTAH WILL CONTINUE TO INCREASE THE MOISTURE OVER SOUTHEAST ARIZONA FOR AN UPSWING IN THUNDERSTORM ACTIVITY THROUGH THE WEEKEND. DISCUSSION...THE AIR MASS IS A LITTLE MORE MOIST TODAY THAN YESTERDAY PER TUCSON SOUNDING THIS MORNING AND A LITTLE HIGHER SURFACE DEW POINTS. THIS MOISTENING TREND WILL CONTINUE NEXT 24 HOURS AS HIGHER MOISTURE VALUES RESIDING TO OUR EAST IN NEW MEXICO WILL BE ADVECTED INTO SOUTHEAST ARIZONA IN THE EASTERLY FLOW. MODIFIED SOUNDING SHOWS CAPE AROUND 1100J/KG THIS AFTERNOON WHICH IS A LITTLE HIGHER THAN YESTERDAY SO SHOULD SEE ANOTHER GOOD FIREWORKS SHOW THIS EVENING ON THE LOWER DESERTS AS OUTFLOWS FROM THE RIM COUNTRY PROPAGATE INTO THE LOWER DESERTS THIS EVENING AND INITIATE THUNDERSTORMS. MAIN CONCERN AGAIN WILL BE STRONG DOWNBURST WINDS DUE TO INVERTED V TYPE SOUNDING. ANOTHER THING THAT WILL HELP BEEF UP THUNDERSTORM ACTIVITY LATE THIS AFTERNOON AND EVENING IS A CYCLONIC CIRCULATION SEEN IN WATER VAPOR IMAGERY OVER WEST CENTRAL NEW MEXICO WHICH WILL ADD DYNAMICAL SUPPORT TO THUNDERSTORM FORMATION AS IT MOVES ACROSS SOUTHEAST ARIZONA THIS EVENING. SATURDAY AND SUNDAY WILL CONTINUE TO BE ACTIVE AS THIS EASTERLY FLOW CONTINUES. THIS SAME PATTERN CONTINUES THROUGH MIDWEEK. TUS 5343. COLLINS .TWC...NONE.
In the hours before
Local storm report, Jul 17, 6:10 PM MST, 1 hour 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
610 PM MST FRI JUL 17 1998
TIME(MST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
605 PM RYAN FIELD AZ WIND DAMAGE
07/17/98 PIMA 94 MPH WIND GUST
600 PM TUCSON AZ WIND DAMAGE
07/17/98 PIMA MOBILE HOME ROOF DESTROYEDLocal storm report, Jul 17, 7:00 PM MST, 1 hour 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
610 PM MST FRI JUL 17 1998
TIME(MST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
605 ZPM RYAN FIELD AZ WIND DAMAGE
07/17/98 PIMA 94 MPH WIND GUST
600 PM TUCSON AZ WIND DAMAGE
07/17/98 PIMA MOBILE HOME ROOF DESTROYEDThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 5:41 PM MST | Severe Thunderstorm Warning | TWC | Pima | 49 min |
| Jul 17, 6:25 PM MST | Severe Thunderstorm Warning | TWC | Pima | 60 min |
| Jul 17, 7:25 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Jul 17, 7:33 PM MST | Severe Thunderstorm Warning | TWC | Greenlee | 47 min |
| Jul 17, 8:17 PM MST | Severe Thunderstorm Warning | TWC | Graham | 48 min |
| Jul 17, 11:14 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 46 min |
| Jul 18, 12:15 AM MST | Severe Thunderstorm Warning | TWC | Pima | 90 min |
| Jul 18, 1:44 AM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Jul 18, 1:37 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 48 min |
| Jul 18, 2:08 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 62 min |
| Jul 18, 2:44 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Jul 18, 3:25 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 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; radar from the NEXRAD Level II archive.