Alert archive / Arizona / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 5, NWS Phoenix, AZ

March 6, 1998Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Mar 6, 1998, 7:35 PM MST for Maricopa County, Arizona. It was in force for 30 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
Mar 6, 1998, 7:35 PM MST (02:35 UTC)
Expired
Mar 6, 1998, 8:05 PM MST
In force
30 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Maricopa County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 2.6 hours before the alert went out and 198 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 1998-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 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 1998-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939587897Sfc1 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
18 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
2139 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

375 
WUUS1 KPHX 070237 RRA
SVRPHX
AZC013-070305-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
735 PM MST FRI MAR 6 1998

*  SEVERE THUNDERSTORM WARNING FOR
   NORTH CENTRAL AND EAST CENTRAL MARICOPA COUNTY IN CENTRAL ARIZONA

*  UNTIL 805 PM MST

*  SOME LOCATIONS AFFECTED
   
   NORTH SCOTTSDALE
   CAVE CREEK
   CHANDLER
   GILBERT
   EAST MESA
 
*  AT 735 PM MST RADAR INDICATED SEVERE THUNDERSTORMS IN NORTH
SCOTTSDALE AND CHANDLER. MOVEMENT WAS TO THE NORTH-NORTHEAST 35
MPH.

STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM.

Nearby

Severe Thunderstorm Warnings in Arizona, 1998Every severe thunderstorm 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.