Alert archive / Arizona / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 508

July 13, 20028 counties in Arizona; Imperial County, California

The Storm Prediction Center issued this severe thunderstorm watch at Jul 13, 2002, 4:45 PM MST for 8 counties in Arizona; Imperial County, California. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 13, 2002, 4:45 PM MST (23:45 UTC)
Expired
Jul 13, 2002, 10:00 PM MST
In force
5 hr
Issued by
the Storm Prediction Center

Counties Gila County, AZ, La Paz County, AZ, Maricopa County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ, Yavapai County, AZ, Yuma County, AZ, Imperial County, CA

The radar

The Yuma radar (KYUX), 190 km from the middle of the area, began a volume at 23:47 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.

Warnings issued inside it

6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 13, 4:51 PM MSTSevere Thunderstorm WarningFGZYavapai24 min
Jul 13, 5:18 PM MSTSevere Thunderstorm WarningFGZYavapai27 min
Jul 13, 5:19 PM MSTSevere Thunderstorm WarningTWCPinal26 min
Jul 13, 5:44 PM MSTSevere Thunderstorm WarningTWCPinal31 min
Jul 13, 5:48 PM MSTSevere Thunderstorm WarningFGZYavapai27 min
Jul 13, 6:08 PM MSTSevere Thunderstorm WarningPSRMaricopa52 min

The nearest sounding before it

Phoenix, AZ (KPSR), launched 12:00Z, 11.8 hours before the alert went out and 164 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, Phoenix, AZ at 12:00Z on 2002-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 187 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, Phoenix, AZ at 12:00Z on 2002-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
187 J/kg
Mixed-layer CIN
-501 J/kg
Mixed-layer LCL
3324 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

Nearby

Severe Thunderstorm Watches in Arizona, 2002Severe Thunderstorm Watches in California, 2002Every severe thunderstorm watch in 2002

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.