Alert archive / Utah / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 669
The Storm Prediction Center issued this severe thunderstorm watch at Jul 27, 2004, 1:05 PM MDT for 4 counties in Colorado; 9 counties in Utah. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2004, 1:05 PM MDT (19:05 UTC)
- Expired
- Jul 27, 2004, 6:00 PM MDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Dolores County, CO, Montezuma County, CO, Montrose County, CO, San Miguel County, CO, Beaver County, UT, Garfield County, UT, Iron County, UT, Kane County, UT, Piute County, UT, San Juan County, UT, Sevier County, UT, Washington County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 134 km from the middle of the area, began a volume at 19:06 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
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 1:16 PM MDT | Severe Thunderstorm Warning | SLC | Kane | 29 min |
| Jul 27, 1:57 PM MDT | Severe Thunderstorm Warning | SLC | Kane, San Juan | 48 min |
| Jul 27, 2:44 PM MDT | Severe Thunderstorm Warning | SLC | Iron | 31 min |
| Jul 27, 2:49 PM MDT | Severe Thunderstorm Warning | SLC | Kane, San Juan | 41 min |
| Jul 27, 3:04 PM MDT | Severe Thunderstorm Warning | GJT | San Juan | 41 min |
| Jul 27, 3:17 PM MDT | Severe Thunderstorm Warning | SLC | Iron | 58 min |
| Jul 27, 3:46 PM MDT | Severe Thunderstorm Warning | GJT | San Juan | 44 min |
| Jul 27, 4:35 PM MDT | Flash Flood Warning | SLC | Garfield | 115 min |
| Jul 27, 4:41 PM MDT | Flash Flood Warning | SLC | Kane | 109 min |
| Jul 27, 5:43 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 32 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
Grand Junction, CO (KGJT), launched 12:00Z, 7.1 hours before the alert went out and 283 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1665 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 232 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 |
|---|---|---|---|---|
| Jul 27, 12:05 PM MDT | Mesoscale Discussion | SPC | Archuleta, Conejos, Delta, Dolores, Gunnison, Hinsdale and 11 more | 2 hr |
| Jul 27, 2:01 PM MDT | Mesoscale Discussion | SPC | Dolores, Montezuma, Montrose, San Miguel | 119 min |
| Jul 27, 4:10 PM MDT | Mesoscale Discussion | SPC | Baca | 3 hr |
| Jul 27, 4:52 PM MDT | Mesoscale Discussion | SPC | Washington | 53 min |
Nearby
Severe Thunderstorm Watches in Utah, 2004Severe Thunderstorm Watches in Colorado, 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.