Alert archive / Utah / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 689
The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 2004, 2:25 PM MDT for 10 counties in Utah. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2004, 2:25 PM MDT (20:25 UTC)
- Expired
- Aug 2, 2004, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
Counties Cache County, UT, Davis County, UT, Duchesne County, UT, Morgan County, UT, Rich County, UT, Salt Lake County, UT, Summit County, UT, Utah County, UT, Wasatch County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 77 km from the middle of the area, began a volume at 20:27 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
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 3:55 PM MDT | Flash Flood Warning | SLC | Davis | 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
Elko, NV (KLKN), launched 12:00Z, 8.4 hours before the alert went out and 226 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
- 2045 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 35 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 2, 12:31 PM MDT | Mesoscale Discussion | SPC | Box Elder, Cache, Daggett, Davis, Duchesne, Juab and 10 more | 2 hr |
| Aug 2, 4:27 PM MDT | Mesoscale Discussion | SPC | Cache, Davis, Duchesne, Morgan, Rich, Salt Lake and 4 more | 63 min |
Nearby
Severe Thunderstorm Watches in Utah, 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.