Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 93, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 30, 1997, 6:05 PM MST for Graham County, Pinal County, Arizona. It was in force for 60 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 30, 1997, 6:05 PM MST (01:05 UTC)
- Expired
- Aug 30, 1997, 7:05 PM MST
- In force
- 60 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
Counties Graham County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 106 km from the middle of the area, began a volume at 01:08 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, 1.1 hours before the alert went out and 87 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
- 565 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 2339 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 18 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 30, 2:30 PM MST, 3 hours 35 minutes earlier.
Area forecast discussion, Aug 30, 2:30 PM MST, 3 hours 35 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST SAT AUG 30 1997 THINGS GOING AS EXPECTED WITH LOTS OF TSTMS OVR FAR SE AZ...SOME HAVE DROPPED LOCALIZED HEAVY RAIN BUT THERE IS STILL NOTHING ORGANIZED YET BUT SEEMS STORMS NEAR DUG ARE DEVELOPING INTO DECENT COMPLEX. THIS SHOULD MOVE NW ACROSS TUS AREA LATE R THIS AFTN AND INTO LOW DESERT THIS AFTN GIVEN WHAT WE HAVE ALREADY SEEN WITH THESE STORMS LUKS LIKE FLASH FLOODING IS LIKELY LATER THIS AFTN. TUS DEWPOINT ALSO INCREASING GIVING US DECENT 1500+ CAPE AND THERE IS A THREAT OF SVR. WE HAVE SEEN SOME BACKING OF H3/H2 WNDS POSSIBLY IN REPONSE TO UPR LVL REMNANTS OF JIMENA WHICH IS PASSING BY TO THE NORTH. UPR LOW NR BAJA APPEARS TO BE STNRY. SO FOR SUN AND MON TROPICAL LIKE MSTR WILL STILL MOVE NWD INTO AZ. PROBLEM IS BIG DAY/DOWN DAY SCENARIO. SINCE ITS GOING GOOD TODAY MAY NOT DUE MUCH BUT RASH ON SUN. THEN MON COULD AGAIN BE A GOOD DAY. BUT THIS IS ATYPICAL PATTERN AND EACH DAY MAY BE GOOD. WHO KNOWS...BEST TO JUST KEEP IT SCT POPS. STILL...POTENTIAL FOR HEAVY RAIN EXISTS EACH DAY. TUS 6444. HOLBROOK TUS...FLASH FLOOD WATCH ALL ZONES TIL 900 PM MST.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 6:05 PM MST | Flash Flood Warning | TWC | Graham, Pinal | 60 min |
Nearby
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.