Alert archive / Arizona / Flash Flood Warnings in 1997
Flash Flood Warning 10, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 28, 1997, 7:46 PM MST for Maricopa County, Arizona. It was in force for 59 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 28, 1997, 7:46 PM MST (02:46 UTC)
- Expired
- Aug 28, 1997, 8:45 PM MST
- In force
- 59 min
- Issued by
- NWS Phoenix, AZ
- Area
- Whole counties
County Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 02:48 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, 2.8 hours before the alert went out and 198 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2698 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -135 m²/s²
- 0-3 km storm-relative helicity
- -49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 flash flood 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, Aug 28, 2:38 PM MST, 5 hours 8 minutes before
AZZ020>025-CAZ030>033-291130- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST/PDT THU AUG 28 1997 ...A MODERATE RISK OF SEVERE WEATHER ACROSS MARICOPA AND NORTHWEST PINAL COUNTY THIS AFTERNOON AND TONIGHT... ...A SLIGHT RISK OF SEVERE WEATHER ACROSS THE FOLLOWING COUNTIES THIS AFTERNOON AND TONIGHT: SOUTHERN GILA...LA PAZ...YUMA...EASTERN RIVERSIDE...AND IMPERIAL. THE AIRMASS ACROSS THE ENTIRE OUTLOOK AREA IS VERY MOIST AND UNSTABLE THIS AFTERNOON...AS A SOUTHERLY FLOW OF AIR CONTINUES ACROSS THE REGION. AN UPPER LEVEL DISTURBANCE WAS CURRENTLY MOVING NORTHWARD INTO FAR SOUTH-CENTRAL ARIZONA THIS AFTERNOON...AND THIS DISTURBANCE WAS CURRENTLY ENHANCING THUNDERSTORM DEVELOPMENT AROUND TUCSON AND NOGALES. THIS DISTURBANCE IS EXPECTED TO TRACK NORTHWARD LATER THIS AFTERNOON AND TONIGHT. WITH THE UPPER LEVEL DISTURBANCE TRACKING NORTHWARD...THERE WILL BE A MODERATE RISK OF SEVERE WEATHER ACROSS MARICOPA AND NORTHWEST PINAL COUNTIES THIS AFTERNOON AND TONIGHT. ACROSS THE REST OF THE COUNTY WARNING AREA...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORM DEVELOPMENT. DAMAGING WINDS IN EXCESS OF AROUND 60 MPH MAY OCCUR WITH SOME THUNDERSTORMS IN THE RISK AREA THIS AFTERNOON AND TONIGHT...ALONG WITH HAIL UP TO 1 INCH IN DIAMETER. HEAVY RAINFALL WILL ALSO BE A CONCERN...AS STORMS THAT FORM TODAY AND TONIGHT WILL TEND TO BE VERY MOISTURE-LADEN AND RATHER SLOW MOVING. THIS COULD POTENTIALLY RESULT IN THE FLOODING OF ROADWAYS AND NORMALLY DRY WASHES. .................................................................... FOR PURPOSES OF THIS OUTLOOK...SEVERE WEATHER REFERS TO ANY OF THE FOLLOWING...DAMAGING WINDS IN EXCESS OF 57 MPH...HAIL 3/4 INCH IN DIAMETER OR LARGER...AND LOCALLY HEAVY RAINFALL WHICH RESULTS IN RUNNING WASHES OR FLOODING. THE OUTLOOK AREA INCLUDES THE FOLLOWING COUNTIES... IN ARIZONA IN CALIFORNIA MARICOPA IMPERIAL SOUTHERN GILA CENTRAL/EASTERN RIVERSIDE NORTHWEST PINAL YUMA LA PAZ ....................................................................
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 7:46 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 59 min |
| Aug 28, 9:51 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 54 min |
Nearby
Flash Flood Warnings in Arizona, 1997Every flash flood 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.