Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 68, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 13, 1997, 5:43 PM MST for Pima County, Arizona. It was in force for 47 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 13, 1997, 5:43 PM MST (00:43 UTC)
- Expired
- Aug 13, 1997, 6:30 PM MST
- In force
- 47 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 00:44 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 13, 6:23 PM MST | Thunderstorm Wind 78 | Tuscon Ryan Fld Arpt, AZ | Thunderstorm winds gusting to 78 kts snapped a power pole knocking out power to 1700 customers and toppled a tree onto a house. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 0.7 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
- 394 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 3093 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -16 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.
000 TTAA00 KTUS 140043 RRA SVRTUS AZC019-140130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 543 PM MST WED AUG 13 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHERN ARIZONA ...NORTHEASTERN PIMA COUNTY AT 542 PM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH EXTREMELY HEAVY RAINFALL 154 MILES WEST SOUTHWEST OF NORTHWEST TUCSON OR 3 MILES NORTHWEST OF RYAN FIELD MOVING EAST AT 5 MPH. SOME LOCATIONS IN THE PATH OF THIS STORM ARE... RYAN FIELD BY 553 PM MST MEYER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 5:35 PM MST | Flash Flood Warning | TWC | Graham, Greenlee | 65 min |
| Aug 13, 6:04 PM MST | Flash Flood Warning | TWC | Pima | 61 min |
| Aug 13, 6:55 PM MST | Flash Flood Warning | TWC | Pima | 90 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.