Alert archive / Arizona / Flash Flood Warnings in 1997
Flash Flood Warning 50, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Sep 13, 1997, 4:31 PM MST for Santa Cruz 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 13, 1997, 4:31 PM MST (23:31 UTC)
- Expired
- Sep 13, 1997, 5:35 PM MST
- In force
- 64 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 46 km from the middle of the area, began a volume at 23:30 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 12:00Z, 11.5 hours before the alert went out and 72 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
- 936 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1786 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 31 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 KTUS 132332 FFWTUS AZC023-140035- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 431 PM MST SAT SEP 13 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 535 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHERN ARIZONA ...EASTERN HALF OF SANTA CRUZ COUNTY AT 430 PM TUCSON DOPPLER RADAR INDICATED A SEVERE THUNDERSTLORM TWO MILES NORTH OF PATAGONIA MOVING SLOWLY NORTH. OTHER STRONG THUNDERSTORMS ARE DEVELOPING 6 MILES SOUTHWEST OF SONOITA AND NEAR THE NOGALES INTERNATIONAL AIRPORT.
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 13, 2:30 PM MST, 2 hours 1 minute earlier.
Area forecast discussion, Sep 13, 2:30 PM MST, 2 hours 1 minute before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST SAT SEP 13 1997 DRY AIR ALOFT SEEMS TO HAVED LIMITED TSTM ACTIVITY. WATER VAPOR SHOWS DRY AIR MAKING ITS WAY TOWARDS ERN ZONES AT THIS TIME. SUN... LINDA IS FORECAST TO BE W OF THE BAJA SPUR AND SHOULD BE BEGINNING TO WEAKEN OVER COOLER WATERS. THE PACIFIC TROUGH MOVES INSIDE 120W. THE UPPER HIGH MOVES NWD INTO NM AND FLOW AT ALL LEVELS BACKS TO SLY. MODELS BEGINNING TO INCREASE MID AND UPPER LEVEL MOISTURE OVER AZ. WHILE LOW LEVEL MOISTURE REMAINS QUITE HIGH THE NEXT TWO DAYS. WILL GO WITH SLIGHTLY HIGHER POPS IN THE W WHERE ETA SHOWING A VORT MAX AND 98Q SHOWING .25-.50 INCH PRECIP. SUN NIGHT...MORE MOISTURE ADVECTION WITH 70 PCT MEAN RH ACROSS THE ENTIRE STATE. WILL KEEP CLOUDS AND PRECIP ALL NIGHT. MONDAY...LINDA FORECAST TO CROSS N OF 30N AND POSSIBLY START RECURVING NEWD. WINDS FORECAST TO DROP INTO THE 60-70 KT RANGE. WILL KEEP CLOUDS/SHOWERS/TSTMS IN FORECAST WITH TRENDING POPS INTO LIKELY CATEGOTY. TUS 2556 TUS...NONE.
In the hours before
Special weather statement, Sep 13, 12:16 PM MST, 4 hours 15 minutes before
AZZ019-026>030-132300-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1145 AM MST SAT SEP 13 1997...THIS PRODUCT IS NOT UPDATED
AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 30 40 50 25 NE 10
GRAHAM 30 40 50 25 NE 10
GREENLEE 40 30 40 10 NE 10
TUCSON/ERN PIMA 30 40 40 20 NE 10
TOHONO OODHAM 30 30 30 10 NE 10
WESTERN PIMA 20 20 20 10 NE 10
SOUTHEAST PINAL 30 30 40 15 NE 10
SANTA CRUZ 30 40 50 25 NE 10
SYNOPSIS...SOUTHEAST ARIZONA REMAINS QUITE MOIST AND UNSTABLE.
THE ATMOSPHERE CAN SUPPORT STRONG THUNDERSTORMS OVER BOTH MOUNTAINS
AND VALLEYS TODAY. STRONG GUSTY WINDS AND LOCALLY HEAVY RAIN IS
POSSIBLE.
*****************************************************************
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/The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 4:31 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 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.