Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 114, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Sep 21, 1997, 12:56 PM MST for Cochise County, Arizona. It was in force for 94 min. 2 reports 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
- Sep 21, 1997, 12:56 PM MST (19:56 UTC)
- Expired
- Sep 21, 1997, 2:30 PM MST
- In force
- 94 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 83 km from the middle of the area, began a volume at 19:57 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 |
|---|---|---|---|
| Sep 21, 1:00 PM MST | Hail 1.5 | Sierra Vista, AZ | |
| Sep 21, 2:10 PM MST | Hail 1.75 | Douglas, AZ |
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 12:00Z, 7.9 hours before the alert went out and 113 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
- 393 J/kg
- Mixed-layer CIN
- -206 J/kg
- Mixed-layer LCL
- 1697 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.3
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 Sep 21, 9:16 AM MST, 3 hours 40 minutes earlier.
Area forecast discussion, Sep 21, 9:16 AM MST, 3 hours 40 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 900 AM MST SUN SEP 21 1997 MOST REPORTS OF RAINFALL OVER NIGHT HAVE BEEN LESS THAN .5 INCH...BUT BISBEE REPORTED 1.4 AND ALPINE REPORTED 2.00 INCHES. GAGES ON THE UPPER GILA RIVER SHOWING SOME RISES ALSO. RADAR STILL SHOWING LOTS OF ECHOS IN ERN ZONES... BUT LOOKS LIKE LAST OF THE LINE IS MOVING THROUGH COCHISE COUNTY AT THIS TIME. 12Z TUS SOUNDING SHOWS LOTS OF LOW LEVEL COOLING. BUT CLOUDS CLEARING OUT OF TUS AREA AT THIS TIME. AND DIURNAL HEATING ENOUGH FOR MORE TSTMS THIS AFTERNOON. LIKELY STARTING LATE IN THE AFTERNOON THOUGH. GOES 9 SOUNDER DEW POINTS PUT THE DEEPEST MOISTURE FROM ABOUT TUS EWD. WILL LIKELY NEE`D TO UPDATE ZONES LATER THIS MORNING. TUS 552. TUS...NONE.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 2:08 AM MST | Severe Thunderstorm Warning | TWC | Pima | 42 min |
| Sep 21, 4:03 AM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 67 min |
| Sep 21, 4:39 AM MST | Severe Thunderstorm Warning | TWC | Graham | 61 min |
| Sep 21, 7:35 AM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 30 min |
| Sep 21, 12:56 PM MST | Flash Flood Warning | TWC | Cochise | 94 min |
| Sep 21, 2:16 PM MST | Flash Flood Warning | TWC | Cochise | 64 min |
| Sep 21, 2:16 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 64 min |
| Sep 21, 2:28 PM MST | Flash Flood Warning | TWC | Cochise, Graham | 62 min |
| Sep 21, 2:28 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 62 min |
| Sep 21, 3:33 PM MST | Flash Flood Warning | TWC | Cochise | 62 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.