Alert archive / Arizona / Flash Flood Warnings in 1998

Flash Flood Warning 39, NWS Tucson, AZ

August 5, 1998Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 5, 1998, 8:54 PM MST for Pima County, Arizona. It was in force for 96 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 5, 1998, 8:54 PM MST (03:54 UTC)
Expired
Aug 5, 1998, 10:30 PM MST
In force
96 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 03:56 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, 3.9 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.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 00:00Z on 1998-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.1000850700500300200100-30°-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 1998-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
7202 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
97 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 060355
FFWTUS
AZC019-060530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
854 PM MST WED AUG 5 1998

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN PIMA COUNTY IN SOUTHERN ARIZONA

* UNTIL 1030 PM MST

* AT 855 PM MST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A THUNDERSTORM WITH VERY HEAVY RAIN 25 MILES EAST OF AJO... MOVING
  SLOWLY SOUTH.



  VPH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 5:24 PM MSTFlash Flood WarningTWCPima2 hr
Aug 5, 5:43 PM MSTSevere Thunderstorm WarningTWCPima62 min
Aug 5, 6:38 PM MSTFlash Flood WarningTWCPima52 min
Aug 5, 6:38 PM MSTSevere Thunderstorm WarningTWCPima52 min
Aug 5, 7:20 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz75 min
Aug 5, 11:56 PM MSTSevere Thunderstorm WarningTWCPinal49 min
Aug 6, 2:44 AM MSTSevere Thunderstorm WarningTWCPima61 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; radar from the NEXRAD Level II archive.