Alert archive / Arizona / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 859
The Storm Prediction Center issued this severe thunderstorm watch at Aug 14, 2003, 1:45 PM MST for 5 counties in Arizona. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 14, 2003, 1:45 PM MST (20:45 UTC)
- Expired
- Aug 14, 2003, 9:00 PM MST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
Counties Gila County, AZ, Maricopa County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ
The radar
The Phoenix radar (KIWA), 75 km from the middle of the area, began a volume at 20:45 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
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 1:49 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 41 min |
| Aug 14, 3:29 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 46 min |
| Aug 14, 4:19 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 56 min |
| Aug 14, 4:21 PM MST | Severe Thunderstorm Warning | TWC | Pima | 39 min |
| Aug 14, 4:26 PM MST | Flash Flood Warning | TWC | Pinal | 4 min |
| Aug 14, 4:48 PM MST | Flash Flood Warning | TWC | Pima | 117 min |
| Aug 14, 4:51 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 39 min |
| Aug 14, 5:10 PM MST | Flash Flood Warning | PSR | Pinal | 50 min |
| Aug 14, 5:17 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 58 min |
| Aug 14, 5:26 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila, Navajo | 49 min |
| Aug 14, 5:35 PM MST | Tornado Warning | FGZ | Coconino, Gila, Navajo | 25 min |
| Aug 14, 5:54 PM MST | Flash Flood Warning | TWC | Pima | 36 min |
| Aug 14, 6:01 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 44 min |
| Aug 14, 6:06 PM MST | Severe Thunderstorm Warning | PSR | Gila | 54 min |
| Aug 14, 6:07 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 53 min |
| Aug 14, 6:35 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 55 min |
| Aug 14, 7:15 PM MST | Flash Flood Warning | TWC | Pima | 105 min |
| Aug 14, 7:29 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 61 min |
| Aug 14, 7:33 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 57 min |
| Aug 14, 8:23 PM MST | Flash Flood Warning | PSR | Maricopa | 37 min |
| Aug 14, 8:28 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 62 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
Phoenix, AZ (KPSR), launched 12:00Z, 8.8 hours before the alert went out and 91 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
- 668 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 1519 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 67 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 |
|---|---|---|---|---|
| Aug 14, 12:44 PM MST | Mesoscale Discussion | SPC | Gila, Graham, Greenlee, Maricopa, Pinal | 2 hr |
| Aug 14, 4:06 PM MST | Mesoscale Discussion | SPC | Apache, Cochise, Gila, Graham, Maricopa, Navajo and 3 more | 84 min |
Nearby
Severe Thunderstorm Watches in Arizona, 2003Every 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.