Alert archive / Arizona / Flash Flood Warnings in 1997
Flash Flood Warning 20, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 8, 1997, 5:38 PM MST for Pinal County, Arizona. It was in force for 62 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 8, 1997, 5:38 PM MST (00:38 UTC)
- Expired
- Aug 8, 1997, 6:40 PM MST
- In force
- 62 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 00:41 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, 0.6 hours before the alert went out and 92 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
- 657 J/kg
- Mixed-layer CIN
- -196 J/kg
- Mixed-layer LCL
- 1881 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUS 090039 FFWTUS AZC021-090140- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 538 PM MST FRI AUG 8 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 640 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...EXTREME SOUTHWESTERN PINAL COUNTY AT 535 PM MST...TUCSON DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM OVER EXTREME SOUTHWEST PINAL COUNTY. THIS STORM WAS 20 MILES SOUTHWEST OF CASA GRANDE AND NEARLY STATIONARY. THIS STORMS WAS CAPABLE OF PRODUCING WINDS GUSTS TO 70 MPH AND RAINFALL ACCUMULATIONS UP TO 2 INCHES THROUGH 635 PM MST. OKULSKI
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.
NWS Tucson, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 8, 2:37 PM MST, 3 hours 1 minute earlier.
Area forecast discussion, Aug 8, 2:37 PM MST, 3 hours 1 minute before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST FRI AUG 8 1997 SCT TSTMS DVLPG THROUGHOUT SE AZ...SEVERAL SEVERE. MAINTAINED STG SFC DEWPTS WELL ABV 60 THRU AFTN WITH VERY LARGE CAPE VALUES. SHOULD SEE DVLPMT CONT THRU AFTN AND EVE. WATCH FOR WELL SUPPORTED OUTFLOWS...ESPECIALLY OFF THE RIM. HEAVY RAINFALL. ENOUGH HVY RAINFALL WITH DEBRIS CLD COULD DEPRESS ACTIVITY SOME LOCATIONS TMW. CURRENT FCST TO REFLECT TSTpMS SUSTAINED INTO THE EVE HRS WITH TEMPS AND TSTM COVERAGE DOWN A LTL FOR TMW. LOW LVL MSTR THRU EXTD. PATTERN MAY SHIFT RDG AXIS TO LESS FAVORABLE POSITION...NOTHING TO POINT AT RIGHT NOW. ANOTHER BUSY TIME. TUS 5233. MEYER TUS...NONE
In the hours before
Special weather statement, Aug 8, 11:59 AM MST, 5 hours 39 minutes before
AZZ019-026>030-082300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST FRI AUG 8 1997...THIS PRODUCT IS NOT UPDATED
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 40 30 40 20 S 8
GRAHAM 40 25 40 20 S 8
GREENLEE 40 10 40 10 S 8
TUCSON/ERN PIMA 40 40 50 25 SW 10
TOHONO OODHAM 30 40 30 15 SW 10
WESTERN PIMA 25 30 25 5 W 10
SOUTHEAST PINAL 30 30 30 10 SW 10
SANTA CRUZ 60 40 50 25 SW 10
SYNOPSIS...
ATMOSPHERE IS LOADED WITH MOISTURE. ENOUGH HEATING FOR VERY
UNSTABLE AFTERNOON AND EVENING. POTENTIAL FOR A VARIETY OF
ACTIVITY WITH HEAVY RAIN...STRONG WINDS...AND HAIL.
*****************************************************************
KEY...
AREAL COVERAGE - PERCENT OF COUNTY OR AREA THAT WILL EXPERIENCE
THUNDERSTORMS
PROB OF SEVERE - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
REACH SEVERE LEVELS (DAMAGING WIND AND/OR
LARGE HAIL)
RAIN GRTR THAN - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
PRODUCE RAIN EXCEEDING 1 INCH OR 2 INCHES IN
ANY LOCATION
STORM MOTION - GENERAL DIRECTION TO WHICH THE STORMS WILL
LIKELY MOVE AND SPEED IN MPH
NOTE...
VALID TIME IS FROM 12 NOON TO 12 MIDNIGHT OF THE DAY OF ISSUANCE
THIS PRODUCT IS NOT TO BE USED IN PLACE OF SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES.
END/MEYERThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 5:18 PM MST | Flash Flood Warning | TWC | Pima | 57 min |
| Aug 8, 5:18 PM MST | Severe Thunderstorm Warning | TWC | Pima | 57 min |
| Aug 8, 5:22 PM MST | Flash Flood Warning | TWC | Pinal | 63 min |
| Aug 8, 5:22 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 63 min |
| Aug 8, 5:38 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 62 min |
| Aug 8, 6:14 PM MST | Flash Flood Warning | TWC | Pima | 61 min |
| Aug 8, 6:23 PM MST | Severe Thunderstorm Warning | TWC | Pima | 47 min |
| Aug 8, 6:27 PM MST | Flash Flood Warning | TWC | Pinal | 63 min |
| Aug 9, 4:42 PM MST | Severe Thunderstorm Warning | TWC | Pima | 48 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.