Alert archive / Montana / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 546

June 19, 200315 counties in Montana

The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2003, 1:05 PM MDT for 15 counties in Montana. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 19, 2003, 1:05 PM MDT (19:05 UTC)
Expired
Jun 19, 2003, 7:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Beaverhead County, MT, Broadwater County, MT, Deer Lodge County, MT, Gallatin County, MT, Granite County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Madison County, MT, Meagher County, MT, Missoula County, MT, Park County, MT, Powell 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.

IssuedProductOfficeCountiesLasted
Jun 19, 1:46 PM MDTSevere Thunderstorm WarningMSORavalli29 min
Jun 19, 2:32 PM MDTSevere Thunderstorm WarningMSOMissoula43 min
Jun 19, 3:10 PM MDTSevere Thunderstorm WarningMSOGranite50 min
Jun 19, 3:31 PM MDTSevere Thunderstorm WarningMSOPowell44 min
Jun 19, 3:31 PM MDTSevere Thunderstorm WarningTFXLewis and Clark59 min
Jun 19, 4:25 PM MDTSevere Thunderstorm WarningTFXLewis and Clark35 min
Jun 19, 5:27 PM MDTSevere Thunderstorm WarningTFXJudith Basin33 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

Great_falls, MT (KTFX), launched 12:00Z, 7.1 hours before the alert went out and 162 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, Great_falls, MT at 12:00Z on 2003-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 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, Great_falls, MT at 12:00Z on 2003-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -115 square meters per square second.1939Sfc1 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
1981 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-115 m²/s²
0-3 km storm-relative helicity
-11 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 18, 7:17 PM MDTMesoscale DiscussionSPCFlathead, Glacier, Lake, Lewis and Clark, Lincoln, Mineral and 4 more88 min
Jun 19, 12:32 PM MDTMesoscale DiscussionSPCBeaverhead, Cascade, Deer Lodge, Flathead, Granite, Jefferson and 10 more118 min
Jun 19, 3:56 PM MDTMesoscale DiscussionSPCBeaverhead, Broadwater, Carbon, Cascade, Deer Lodge, Fergus and 21 more94 min
Jun 19, 5:46 PM MDTMesoscale DiscussionSPCCascade, Chouteau, Fergus, Hill, Judith Basin, Lewis and Clark and 6 more59 min

Nearby

Severe Thunderstorm Watches in Montana, 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.