Alert archive / Arizona / Flash Flood Warnings in 1998

Flash Flood Warning 49, NWS Tucson, AZ

August 17, 1998Pima County, Pinal County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 17, 1998, 6:29 PM MST for Pima County, Pinal County, Arizona. It was in force for 61 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 17, 1998, 6:29 PM MST (01:29 UTC)
Expired
Aug 17, 1998, 7:30 PM MST
In force
61 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, 1.5 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 1998-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 107 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 1998-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
107 J/kg
Mixed-layer CIN
-196 J/kg
Mixed-layer LCL
2013 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUS 180129
FFWTUS
AZC019-021-180230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
629 PM MST MON AUG 17 1998

  THE NATIONAL WEATHER SERVICE IN TUCSON HAS EXTENDED THE FLASH
  FLOOD WARNING FOR NORTHEASTERN PIMA AND SOUTHERN PINAL COUNTIES
  UNTIL 730 PM MST...

* AT 630... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAIN NORTHEAST PIMA COUNTY AND
  SOUTHERN PINAL COUNTIES... MOVIZNG SLOWLY NORTHEAST. STONGEST
  STORMS ARE IN THE VICINTY OF ORACLE.

  VPH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 5:00 PM MSTFlash Flood WarningTWCPima, Pinal90 min

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.