Alert archive / Arizona / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 805

July 26, 20037 counties in Arizona

The Storm Prediction Center issued this severe thunderstorm watch at Jul 26, 2003, 3:05 PM MST for 7 counties in Arizona. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 26, 2003, 3:05 PM MST (22:05 UTC)
Expired: Jul 26, 2003, 9:00 PM MST
In force: 6 hr
Issued by: the Storm Prediction Center

Counties Cochise County, AZ, Gila County, AZ, Graham County, AZ, Greenlee County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ

The radar

The Phoenix radar (KIWA), 91 km from the middle of the area, began a volume at 22:05 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

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

Issued	Product	Office	Counties	Lasted
Jul 26, 4:12 PM MST	Severe Thunderstorm Warning	TWC	Cochise	33 min
Jul 26, 4:27 PM MST	Severe Thunderstorm Warning	FGZ	Gila	33 min
Jul 26, 4:43 PM MST	Severe Thunderstorm Warning	TWC	Cochise	47 min
Jul 26, 4:59 PM MST	Severe Thunderstorm Warning	PSR	Gila	61 min
Jul 26, 5:06 PM MST	Flash Flood Warning	TWC	Cochise	24 min
Jul 26, 5:31 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	59 min
Jul 26, 5:40 PM MST	Severe Thunderstorm Warning	FGZ	Gila	35 min
Jul 26, 6:13 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Jul 26, 6:19 PM MST	Severe Thunderstorm Warning	FGZ	Gila	31 min
Jul 26, 7:04 PM MST	Severe Thunderstorm Warning	PSR	Gila	56 min
Jul 26, 7:37 PM MST	Flash Flood Warning	TWC	Cochise	23 min
Jul 26, 8:30 PM MST	Flash Flood Warning	TWC	Cochise	2 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 10.1 hours before the alert went out and 55 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 344 J/kg
Mixed-layer CIN: -291 J/kg
Mixed-layer LCL: 1707 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 26, 1:21 PM MST	Mesoscale Discussion	SPC	Cochise, Gila, Graham, Pinal	114 min

Nearby

Severe Thunderstorm Watches in Arizona, 2003 Every severe thunderstorm watch in 2003

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.