Alert archive / Arizona / Flash Flood Warnings in 1998

Flash Flood Warning 16, NWS Tucson, AZ

July 7, 1998Pima County, Pinal County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 7, 1998, 7:51 PM MST for Pima County, Pinal County, Arizona. It was in force for 69 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
Jul 7, 1998, 7:51 PM MST (02:51 UTC)
Expired
Jul 7, 1998, 9:00 PM MST
In force
69 min
Issued by
NWS Tucson, AZ
Area
Whole counties

Counties Pima County, AZ, Pinal County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 2.9 hours before the alert went out and 73 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.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 00:00Z on 1998-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 672 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 00:00Z on 1998-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
672 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1802 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTUS 080253
FFWTUS
AZC019-021-080900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
751 PM MST TUE JUL 7 1998

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN AND EASTERN PIMA COUNTY IN SOUTHERN ARIZONA
  SOUTHEASTERN PINAL COUNTY IN SOUTH CENTRAL ARIZONA

  THIS INCLUDES THE TUCSON METRO AREA.

* UNTIL 900 PM MST

* AT 750 PM MST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH HEAVY RAIN IN SOUTHEAST PINAL...NORTHEAST AND
  EASTERN PIMA COUNTIES... MOVING SOUTHWEST 10 TO 15 MPH.
  SPOTTERS OVER EASTERN TUCSON AND VAIL HAVE REPORTED 1 TO 3 INCHES
  OF RAIN SINCE ABOUT 5 PM. ADDITIONAL RAINFALL WILL CONTINUE TO
  CAUSE FLOODING OF STREETS AND WASHES.


  T

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 Jul 7, 2:25 PM MST, 5 hours 26 minutes earlier.

Area forecast discussion, Jul 7, 2:25 PM MST, 5 hours 26 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
225 PM MST TUE JUL 7 1998

SYNOPSIS...MONSOONAL FLOW WILL CONTINUE ACROSS SOUTHEAST ARIZONA
OVER THE NEXT FEW DAYS. HIGH PRESSURE WILL BUILD IN BY THE END OF
THE WEEK RESULTING IN WARMER AFTERNOON TEMPERATURES.

DISCUSSION...I JUST CANT FIND ANY REASON TO DRY US OUT. AT LEAST THE
TREND FOR THE NOCTURNAL STORMS APPEARS OVER. BUT WE DONT NEED MUCH
HEATING FOR TODAY TO GET STORMS GOING AND WITH NORTHERRLY FLOW ALOFT
STORMS FORMING ON THE RIM SHOULD MOVE DOWN HERE. HI PW VALUES WILL
LIKELY LEAD TO HEAVY RAINFALL WITH STORMS THIS AFTERNOON/EVENING AND
EARLIER ISSUED FLASH FLOOD WATCH FOR SE PINAL...CENTRAL AND EASTERN
PIMA...AND SANTA CRUZ COUNTIES UNTIL 6 PM MST/01Z. MAYBE A LITTLE
MID LVL DRYING AS TROF DROPS DOWN ALONG WEST COAST IN NEXT 48 HRS.
THIS MAY PUT US IN AN UP DAY DOWN DAY SCENARIO FOR LOW DESERTS BUT
EXPECT MTNS TO BE ACTIVE EACH DAY. FARTHER DOWN THE RORAD PATTERN
LUKS FAVORABLE FOR MONSOON CONDITIONS TO CONTINUE.

TUS 6343. HOLBROOK/GLUECK

.TWC...FLASH FLOOD WATCH UNTIL 01Z/6PM MST FOR ZONES 29...32>34.

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 7, 5:53 PM MSTFlash Flood WarningTWCPima, Pinal2 hr

Nearby

Flash Flood Warnings in Arizona, 1998Every flash flood warning in 1998

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.