Alert archive / Arizona / Flash Flood Warnings in 1997
Flash Flood Warning 45, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Sep 1, 1997, 6:57 PM MST for Pima County, Arizona. It was in force for 118 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 1, 1997, 6:57 PM MST (01:57 UTC)
- Expired
- Sep 1, 1997, 8:55 PM MST
- In force
- 118 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 01:59 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, 2.0 hours before the alert went out and 84 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
- 907 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 1919 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUS 020158 FFWTUS AZC019-020355- BULLETIN FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 657 PM MST MON SEP 1 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 855 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHERN ARIZONA ...SOUTHEASTERN PIMA COUNTY AT 650 PM A SPOTTER IN ARIVACA REPORTED 2.5 INCHES OF RAIN IN THE PAST 15 MINUTES. FLOODING OF LOW SPOTS ALONG ARIVACA ROAD AND ALONG HIGHWAY $286 BETWEEN THREE POINTS AND SASABE IS LIKELY AND WILL CONTINUE UNTIL 900 PM. WASHES IN THIS AREA WILL ALSO BE RUNNING WITH WATER AND OVERFLOWING OF SOME WASHES IS LIKELY. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! COLLINS
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 Sep 1, 2:30 PM MST, 4 hours 27 minutes earlier.
Area forecast discussion, Sep 1, 2:30 PM MST, 4 hours 27 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST MON SEP 1 1997 DRIER AIR MOVG INTO SE AZ AT MID LVLS FM THE E THIS AFTN. DEW PTS IN THE MID TO UPR 40S DEGREES F IN SW NM. TS SCT TO ISOLD...BUT SOME ARE SUPRISINGLY INTENSE. DRY MID LVL AIR TO MAKE FOR A FAIRLY QUIET TUE FOR MOST OF SE AZ. DP MSTR STILL ACRS WRN AZ. H5 HI TO LIFT INTO ERN CO AND BACK THE FLOW ALF TO A E TO SE DIRECTION NEXT TWO DAYS WHICH SHOULD LIMIT THE SEEMINGLY NON STOP FLOW OF TROP MSTR INTO THE CWA. DRY AIR IS ERODED BY THE SURROUNDING H7 MSTR WED FOR A RETURN TO A MORE TYPICAL MONSOONAL PATTERN. MED RNG MODELS DIVERGE ON THE STRENGTH OF A GULF OF AK TROF POISED TO MOV INTO THE WRN U.S. BY NEXT WEEKEND. MRF FCSTS PERSISTANCE FOR SE AZ WHILE THE EURO MODELS...SPCLLY THE UKMET WANT TO MAKE THIS FEATURE THE THE POTENTIAL MONSOON ENDER. AGREE WITH PHX THAT MRF LOOKS LIKE THE BETTER MODEL SINCE THE TREND HAS BEEN THIS SUMMER FOR THESE SYSTEMS TO SHEAR THEMSELVES APART WHEN THEY HIT THE MEAN RDG POSTN. TUS 3232. OKULSKI TUS...NONE
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.