Alert archive / Montana / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 512

June 22, 200526 counties in Montana

The Storm Prediction Center issued this severe thunderstorm watch at Jun 22, 2005, 3:50 PM MDT for 26 counties in Montana. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 22, 2005, 3:50 PM MDT (21:50 UTC)
Expired
Jun 22, 2005, 11:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
All 26 counties

Blaine County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Daniels County, MT, Fergus County, MT, Gallatin County, MT, Garfield County, MT, Golden Valley County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, McCone County, MT, Meagher County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Roosevelt County, MT, Sheridan County, MT, Silver Bow County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Valley County, MT, Wheatland County, MT, Yellowstone County, MT

The radar

The Billings radar (KBLX), 140 km from the middle of the area, began a volume at 21:54 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

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

IssuedProductOfficeCountiesLasted
Jun 22, 4:00 PM MDTSevere Thunderstorm WarningBYZGolden Valley, Musselshell54 min
Jun 22, 4:17 PM MDTSevere Thunderstorm WarningTFXCascade58 min
Jun 22, 4:28 PM MDTTornado WarningTFXCascade, Meagher32 min
Jun 22, 5:16 PM MDTSevere Thunderstorm WarningTFXCascade, Chouteau, Judith Basin59 min
Jun 22, 5:47 PM MDTSevere Thunderstorm WarningBYZMusselshell41 min
Jun 22, 6:16 PM MDTSevere Thunderstorm WarningTFXChouteau, Hill60 min
Jun 22, 7:05 PM MDTSevere Thunderstorm WarningGGWGarfield55 min
Jun 22, 7:05 PM MDTSevere Thunderstorm WarningTFXBlaine73 min
Jun 22, 8:10 PM MDTSevere Thunderstorm WarningGGWPhillips65 min
Jun 22, 9:13 PM MDTSevere Thunderstorm WarningGGWPhillips, Valley62 min
Jun 22, 10:14 PM MDTSevere Thunderstorm WarningGGWValley61 min
Jun 22, 10:50 PM MDTSevere Thunderstorm WarningGGWDaniels55 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, 9.8 hours before the alert went out and 97 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 2005-06-22Temperature 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, Great_falls, MT at 12:00Z on 2005-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.19395878Sfc1 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
2428 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
81 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 21, 6:32 PM MDTMesoscale DiscussionSPCCuster, Garfield, McCone, Petroleum, Phillips, Prairie and 2 more88 min
Jun 21, 7:00 PM MDTSevere Thunderstorm WatchSPCCuster, Daniels, Dawson, Fallon, Garfield, McCone and 11 more7 hr
Jun 21, 9:32 PM MDTMesoscale DiscussionSPCCascade, Chouteau, Hill, Lewis and Clark, Liberty, Pondera and 3 more58 min
Jun 21, 10:26 PM MDTMesoscale DiscussionSPCCuster, Daniels, Dawson, Fallon, Garfield, McCone and 9 more64 min
Jun 22, 1:15 AM MDTMesoscale DiscussionSPCCarter, Custer, Daniels, Dawson, Fallon, Garfield and 14 more60 min
Jun 22, 2:50 PM MDTMesoscale DiscussionSPCBlaine, Broadwater, Cascade, Chouteau, Fergus, Gallatin and 15 more115 min

Nearby

Severe Thunderstorm Watches in Montana, 2005Every severe thunderstorm watch in 2005

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.