Alert archive / Idaho / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 418
The Storm Prediction Center issued this severe thunderstorm watch at Jun 9, 2004, 2:40 PM MDT for 22 counties in Idaho; 10 counties in Montana. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2004, 2:40 PM MDT (20:40 UTC)
- Expired
- Jun 9, 2004, 9:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Bannock County, ID, Bingham County, ID, Blaine County, ID, Bonneville County, ID, Butte County, ID, Camas County, ID, Caribou County, ID, Cassia County, ID, Clark County, ID, Custer County, ID, Franklin County, ID, Fremont County, ID, Gooding County, ID, Jefferson County, ID, Jerome County, ID, Lemhi County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Oneida County, ID, Power County, ID, Twin Falls County, ID, Beaverhead County, MT, Broadwater County, MT, Deer Lodge County, MT, Gallatin County, MT, Granite County, MT, Jefferson County, MT, Madison County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT
The radar
The Pocatello radar (KSFX), 125 km from the middle of the area, began a volume at 20:44 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 |
|---|---|---|---|---|
| Jun 9, 4:00 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 45 min |
| Jun 9, 4:03 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham | 27 min |
| Jun 9, 4:29 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 46 min |
| Jun 9, 4:43 PM MDT | Severe Thunderstorm Warning | PIH | Fremont, Madison | 32 min |
| Jun 9, 4:56 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont | 34 min |
| Jun 9, 5:04 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 11 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 8.7 hours before the alert went out and 384 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
- 2997 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 109 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 |
|---|---|---|---|---|
| Jun 9, 2:13 PM MDT | Mesoscale Discussion | SPC | Bannock, Bear Lake, Bingham, Blaine, Bonneville, Butte and 19 more | 92 min |
| Jun 9, 5:59 PM MDT | Mesoscale Discussion | SPC | Bannock, Bingham, Blaine, Bonneville, Butte, Camas and 16 more | 91 min |
Nearby
Severe Thunderstorm Watches in Idaho, 2004Severe Thunderstorm Watches in Montana, 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.