Alert archive / Arizona / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 62
The Storm Prediction Center issued this severe thunderstorm watch at Apr 10, 2004, 11:55 AM MST for 8 counties in Arizona. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2004, 11:55 AM MST (18:55 UTC)
- Expired
- Apr 10, 2004, 6:00 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, Maricopa County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ
The radar
The Phoenix radar (KIWA), 12 km from the middle of the area, began a volume at 18:59 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 12:15 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Navajo | 30 min |
| Apr 10, 12:50 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Navajo | 25 min |
| Apr 10, 2:33 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 57 min |
| Apr 10, 2:45 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 30 min |
| Apr 10, 4:00 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 60 min |
| Apr 10, 4:48 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 42 min |
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, 6.9 hours before the alert went out and 147 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.
- Mixed-layer CAPE
- 115 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 1950 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 11:16 AM MST | Mesoscale Discussion | SPC | Cochise, Gila, Graham, Maricopa, Pima, Pinal and 1 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Arizona, 2004Every severe thunderstorm watch in 2004
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.