Alert archive / Montana / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 505

June 10, 2003Clearwater County, Shoshone County, Idaho; 15 counties in Montana

The Storm Prediction Center issued this severe thunderstorm watch at Jun 10, 2003, 1:15 PM PDT for Clearwater County, Shoshone County, Idaho; 15 counties in Montana. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 10, 2003, 1:15 PM PDT (20:15 UTC)
Expired
Jun 10, 2003, 8:00 PM PDT
In force
7 hr
Issued by
the Storm Prediction Center

Counties Clearwater County, ID, Shoshone County, ID, Deer Lodge County, MT, Flathead County, MT, Glacier County, MT, Granite County, MT, Jefferson County, MT, Lake County, MT, Lewis and Clark County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Pondera County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Teton County, MT

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 10, 1:46 PM PDTSevere Thunderstorm WarningTFXPondera, Toole59 min
Jun 10, 2:34 PM PDTSevere Thunderstorm WarningTFXPondera, Teton56 min
Jun 10, 2:40 PM PDTSevere Thunderstorm WarningMSOLake50 min
Jun 10, 3:51 PM PDTSevere Thunderstorm WarningMSOPowell39 min
Jun 10, 4:35 PM PDTSevere Thunderstorm WarningTFXLewis and Clark55 min
Jun 10, 6:53 PM PDTSevere Thunderstorm WarningMSOLake52 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

Spokane, WA (KOTX), launched 12:00Z, 8.3 hours before the alert went out and 202 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-pSkew-T log-p diagram, Spokane, WA at 12:00Z on 2003-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2003-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1304 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
46 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.

IssuedProductOfficeCountiesLasted
Jun 10, 11:12 AM PDTMesoscale DiscussionSPCBroadwater, Cascade, Chouteau, Deer Lodge, Granite, Jefferson and 6 more2 hr

Nearby

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