Alert archive / Arizona / Flash Flood Warnings in 1997
Flash Flood Warning 16, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Sep 8, 1997, 6:31 PM MST for Maricopa County, Arizona. It was in force for 64 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
- Sep 8, 1997, 6:31 PM MST (01:31 UTC)
- Expired
- Sep 8, 1997, 7:35 PM MST
- In force
- 64 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 01:32 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, 1.5 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
- 190 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 3366 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 67 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 KPHX 090133
FFWPHX
AZC013-090235-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD AND SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
631 PM MST MON SEP 8 1997
* FLASH FLOOD AND SEVERE THUNDERSTORM WARNING FOR
EAST CENTRAL MARICOPA COUNTY IN CENTRAL ARIZONA
* UNTIL 735 PM MST
* SOME LOCATIONS AFFECTED...
THE SALT RIVER RECREATIONAL LAKES
THE APACHE TRAIL
* AT 625 PM MST RADAR DETECTED A SEVERE STORM WITH EXTREMELY
HEAVY RAIN LOCATED NEAR APACHE LAKE. STORM MOVEMENT WAS TOWARD
THE WEST NORTHWEST AT 5 MPH. IN ADDITION...RADAR ESTIMATED
RAINFALL RATES OF 2 INCHES PER HOUR WITH THIS AND NEARBY
STORMS. THUS... FLASH FLOODING IS OCCURRING OR IMMINENT WITH
THESE STORMS.
STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM.
VASQUEZWhat 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, Sep 8, 2:42 PM MST, 3 hours 49 minutes before
AZZ020>025-CAZ030>033-091130- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST/PDT SUN SEP 7 1997 ...A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE OUTLOOK AREA THIS AFTERNOON AND TONIGHT... ISOLATED TO SCATTERED THUNDERSTORMS ARE FORECAST ACROSS THE ENTIRE OUTLOOK AREA THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK THAT SOME OF THESE THUNDERSTORMS COULD BECOME SEVERE. THIS INCLUDES THE FOLLOWING COUNTIES IN ARIZONA AND SOUTHEAST CALIFORNIA...SOUTHERN GILA...MARICOPA...NORTHWEST PINAL...LA PAZ...YUMA...IMPERIAL...AND EASTERN/CENTRAL RIVERSIDE. THE MAIN THREAT WITH THESE STORMS WILL BE LOCALLY HEAVY RAINFALL... STRONG GUSTY WINDS IN EXCESS OF 60 MPH...AND POSSIBLY BLOWING DUST. THE AIRMASS ACROSS THE OUTLOOK AREA REMAINS MOIST AND UNSTABLE TODAY...AND UPPER LEVEL WINDS WOULD TEND TO FAVOR THE DEVELOPMENT OF ISOLATED SEVERE THUNDERSTORMS ACROSS THE RISK AREA. IN ADDITION... ANY STORMS THAT FORM IN THE EASTERN PORTION OF THE OUTLOOK AREA TODAY AND TONIGHT WILL TEND TO BE RATHER SLOW MOVING...AND THIS WILL ENHANCE THE POTENTIAL FOR LOCALLY HEAVY RAINFALL AND FLASH FLOODING. .................................................................... FOR THE 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 YUMA IMPERIAL NORTHWEST PINAL LA PAZ CENTRAL AND EASTERN RIVERSIDE SOUTHERN GILA ....................................................................
Special weather statement, Sep 8, 3:13 PM MST, 3 hours 18 minutes before
AZZ020>025-CAZ030>033-091130- SEVERE WEATHER OUTLOOK...CORRECTED DATE NATIONAL WEATHER SERVICE PHOENIX AZ 245 PM MST/PDT MON SEP 8 1997 ...A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE OUTLOOK AREA THIS AFTERNOON AND TONIGHT... ISOLATED TO SCATTERED THUNDERSTORMS ARE FORECAST ACROSS THE ENTIRE OUTLOOK AREA THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK THAT SOME OF THESE THUNDERSTORMS COULD BECOME SEVERE. THIS INCLUDES THE FOLLOWING COUNTIES IN ARIZONA AND SOUTHEAST CALIFORNIA...SOUTHERN GILA...MARICOPA...NORTHWEST PINAL...LA PAZ...YUMA...IMPERIAL...AND EASTERN/CENTRAL RIVERSIDE. THE MAIN THREAT WITH THESE STORMS WILL BE LOCALLY HEAVY RAINFALL... STRONG GUSTY WINDS IN EXCESS OF 60 MPH...AND POSSIBLY BLOWING DUST. THE AIRMASS ACROSS THE OUTLOOK AREA REMAINS MOIST AND UNSTABLE TODAY...AND UPPER LEVEL WINDS WOULD TEND TO FAVOR THE DEVELOPMENT OF ISOLATED SEVERE THUNDERSTORMS ACROSS THE RISK AREA. IN ADDITION... ANY STORMS THAT FORM IN THE EASTERN PORTION OF THE OUTLOOK AREA TODAY AND TONIGHT WILL TEND TO BE RATHER SLOW MOVING...AND THIS WILL ENHANCE THE POTENTIAL FOR LOCALLY HEAVY RAINFALL AND FLASH FLOODING. .................................................................... FOR THE 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 YUMA IMPERIAL NORTHWEST PINAL LA PAZ CENTRAL AND EASTERN RIVERSIDE SOUTHERN GILA ....................................................................
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 5:29 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 61 min |
| Sep 8, 6:08 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 62 min |
| Sep 8, 6:31 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 64 min |
| Sep 9, 4:36 PM MST | Severe Thunderstorm Warning | PSR | Yuma | 64 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.