Alert archive / Idaho / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 441

May 30, 200318 counties in Idaho; 9 counties in Montana

The Storm Prediction Center issued this severe thunderstorm watch at May 30, 2003, 12:35 PM MDT for 18 counties in Idaho; 9 counties in Montana. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: May 30, 2003, 12:35 PM MDT (18:35 UTC)
Expired: May 30, 2003, 7:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 27 counties

Bingham County, ID, Blaine County, ID, Boise County, ID, Butte County, ID, Camas County, ID, Cassia County, ID, Clark County, ID, Custer County, ID, Elmore County, ID, Gooding County, ID, Jefferson County, ID, Jerome County, ID, Lemhi County, ID, Lincoln County, ID, Minidoka County, ID, Owyhee 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, Ravalli County, MT, Silver Bow County, MT

Warnings issued inside it

7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 30, 1:12 PM MDT	Severe Thunderstorm Warning	MSO	Lemhi	48 min
May 30, 1:28 PM MDT	Severe Thunderstorm Warning	BOI	Owyhee	62 min
May 30, 2:16 PM MDT	Severe Thunderstorm Warning	PIH	Bingham	44 min
May 30, 2:27 PM MDT	Severe Thunderstorm Warning	BOI	Elmore, Owyhee	33 min
May 30, 3:11 PM MDT	Severe Thunderstorm Warning	MSO	Silver Bow	49 min
May 30, 4:59 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin	46 min
May 30, 5:20 PM MDT	Severe Thunderstorm Warning	MSO	Lemhi	40 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

Boise Airport, ID (KBOI), launched 12:00Z, 6.6 hours before the alert went out and 151 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1493 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 382 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 29, 8:25 PM MDT	Mesoscale Discussion	SPC	Bonneville, Caribou, Fremont, Madison, Teton	65 min
May 30, 8:29 AM MDT	Mesoscale Discussion	SPC	Bannock, Bingham, Blaine, Bonneville, Butte, Camas and 13 more	2 hr
May 30, 9:00 AM MDT	Severe Thunderstorm Watch	SPC	Ada, Blaine, Boise, Camas, Canyon, Cassia and 10 more	5 hr
May 30, 11:46 AM MDT	Mesoscale Discussion	SPC	Bannock, Bingham, Blaine, Butte, Camas, Cassia and 12 more	119 min
May 30, 1:06 PM MDT	Mesoscale Discussion	SPC	Bannock, Bear Lake, Bingham, Blaine, Butte, Camas and 10 more	2 hr
May 30, 2:18 PM MDT	Mesoscale Discussion	SPC	Bingham, Butte, Cassia, Jefferson, Jerome, Minidoka and 2 more	117 min
May 30, 5:28 PM MDT	Mesoscale Discussion	SPC	Ada, Bingham, Blaine, Boise, Butte, Camas and 13 more	92 min

Nearby

Severe Thunderstorm Watches in Idaho, 2003 Severe Thunderstorm Watches in Montana, 2003 Every 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.