Alert archive / Montana / Mesoscale Discussions in 2005

Mesoscale Discussion 1395

June 19, 20057 counties in Montana; Lawrence County, South Dakota; Crook County, Sheridan County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2005, 10:43 PM MDT for 7 counties in Montana; Lawrence County, South Dakota; Crook County, Sheridan County, Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 19, 2005, 10:43 PM MDT (04:43 UTC)
Expired
Jun 20, 2005, 12:45 AM MDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Big Horn County, MT, Carter County, MT, Custer County, MT, Powder River County, MT, Rosebud County, MT, Treasure County, MT, Yellowstone County, MT, Lawrence County, SD, Crook County, WY, Sheridan County, WY

The radar

The Billings radar (KBLX), 192 km from the middle of the area, began a volume at 04:43 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.7 hours before the alert went out and 319 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, Glasgow Intl Airport, MT at 00:00Z on 2005-06-20Temperature 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, Glasgow Intl Airport, MT at 00:00Z on 2005-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 square meters per square second.1939587897Sfc1 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
2919 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
18 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 6:55 PM MDTSevere Thunderstorm WatchSPCBig Horn, Carbon, Carter, Custer, Musselshell, Powder River and 3 more7 hr
Jun 20, 1:17 AM MDTMesoscale DiscussionSPCCarter, Custer, Dawson, Fallon, Powder River, Prairie and 3 more58 min
Jun 20, 2:00 AM MDTSevere Thunderstorm WatchSPCCarter, Custer, Fallon, Powder River, Prairie, Rosebud and 1 more5 hr
Jun 20, 3:40 AM MDTMesoscale DiscussionSPCCarter, Custer, Fallon, Prairie, Rosebud, Wibaux95 min
Jun 20, 3:09 PM MDTMesoscale DiscussionSPCBig Horn, Blaine, Broadwater, Cascade, Chouteau, Fergus and 16 more2 hr
Jun 20, 4:00 PM MDTSevere Thunderstorm WatchSPCBlaine, Cascade, Chouteau, Fergus, Garfield, Hill and 9 more7 hr
Jun 20, 4:20 AM MDTSevere Thunderstorm WatchSPCBrown, Campbell, McPherson, Marshall, Walworth5 hr
Jun 20, 6:39 AM MDTMesoscale DiscussionSPCMarshall96 min
Jun 20, 8:19 AM MDTMesoscale DiscussionSPCMarshall56 min
Jun 20, 9:42 AM MDTMesoscale DiscussionSPCMarshall63 min
Jun 20, 11:59 AM MDTMesoscale DiscussionSPCBrookings, Clark, Codington, Deuel, Grant, Hamlin and 3 more91 min
Jun 20, 12:25 PM MDTSevere Thunderstorm WatchSPCBrookings, Clark, Deuel, Hamlin, Kingsbury, Lake and 4 more7 hr
Jun 20, 1:13 PM MDTMesoscale DiscussionSPCAurora, Bennett, Brule, Buffalo, Charles Mix, Douglas and 3 more2 hr
Jun 20, 2:45 PM MDTSevere Thunderstorm WatchSPCClay, Lincoln, Union6 hr

Nearby

Mesoscale Discussions in Montana, 2005Mesoscale Discussions in Wyoming, 2005Mesoscale Discussions in South Dakota, 2005Every mesoscale discussion 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.