Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 11, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Jul 9, 1997, 7:35 PM MST for Maricopa County, Arizona. It was in force for 25 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
- Jul 9, 1997, 7:35 PM MST (02:35 UTC)
- Expired
- Jul 9, 1997, 8:00 PM MST
- In force
- 25 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 7:45 PM MST | Thunderstorm Wind 57 | Mesa, AZ | A weather spotter at McKellips and Mesa Drive reported a ham radio tower had blown down and his neighbours' television antennas had either blown down or buckled from the strong winds. He also reported blown-down fences in his neighbourhood. |
| Jul 9, 7:50 PM MST | Thunderstorm Wind 61 | Tempe, AZ | A weather service employee near Broadway Road and Rural Road reported shingles ripped off his home. His neighbour reported a eucalyptus tree was sheared off at the top. |
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
Phoenix, AZ (KPHX), launched 00:00Z, 2.6 hours before the alert went out and 49 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
- 557 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 3547 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -10 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.
In the hours before
Special weather statement, Jul 9, 3:07 PM MST, 4 hours 28 minutes before
AZZ020>025-CAZ030>033-100130- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 310 PM MST/PDT WED JUL 9 1997 ...ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED IN THE OUTLOOK AREA THIS AFTERNOON AND TONIGHT... LOWER LEVEL MOISTURE INCREASED THROUGHOUT SOUTHWEST ARIZONA AND SOUTHEAST CALIFORNIA DURING THE LAST 24 HOURS. ADDITIONALLY...AN UPPER LEVEL SYSTEM WAS LOCATED WEST OF YUMA...WHICH WILL HELP TRIGGER ISOLATED THUNDERSTORMS LATE THIS AFTERNOON AND THIS EVENING...FROM ABOUT GILA BEND...TO PHOENIX AND EASTWARD TO THE GLOBE/MIAMI AREA. LITTLE OR NO RAINFALL IS EXPECTED...HOWEVER THE MAIN THREAT WILL BE VERY STRONG AND GUSTY WINDS WITH AREAS OF BLOWING DUST. MOTORISTS ARE URGED TO SLOW DOWN AND DRIVE WITH EXTRA CARE THIS EVENING. VISIBILITIES COULD BE LESS THAN 1/4 MILE AT TIMES AND ISOLATED WIND GUSTS TO NEAR 60 MPH. ........................................................................ THE OUTLOOK AREA INCLUDES THE FOLLOWING COUNTIES... IN ARIZONA IN CALIFORNIA MARICOPA YUMA IMPERIAL SOUTHERN GILA LA PAZ CENTRAL/EASTERN RIVERSIDE NORTHWEST PINAL
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 5:26 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 2 hr |
| Jul 9, 6:22 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 68 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.