Alert archive / Montana / Mesoscale Discussions in 2004

Mesoscale Discussion 1606

July 10, 200427 counties in Montana; 5 counties in North Dakota; Harding County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2004, 6:56 PM MDT for 27 counties in Montana; 5 counties in North Dakota; Harding County, South Dakota. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Jul 10, 2004, 6:56 PM MDT (00:56 UTC)
Expired
Jul 10, 2004, 8:30 PM MDT
In force
94 min
Issued by
the Storm Prediction Center
All 33 counties

Blaine County, MT, Carter County, MT, Cascade County, MT, Chouteau County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Fergus County, MT, Garfield County, MT, Hill County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Pondera County, MT, Powder River County, MT, Powell County, MT, Prairie County, MT, Richland County, MT, Rosebud County, MT, Teton County, MT, Toole County, MT, Treasure County, MT, Wibaux County, MT, Billings County, ND, Bowman County, ND, Golden Valley County, ND, McKenzie County, ND, Slope County, ND, Harding County, SD

The radar

The Billings radar (KBLX), 146 km from the middle of the area, began a volume at 00:58 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 nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 0.9 hours before the alert went out and 128 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 00:00Z on 2004-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 50 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 00:00Z on 2004-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
50 J/kg
Mixed-layer CIN
-180 J/kg
Mixed-layer LCL
2812 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.6

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
Jul 10, 9:40 PM MDTMesoscale DiscussionSPCDawson, Prairie, Wibaux2 hr
Jul 10, 11:40 PM MDTMesoscale DiscussionSPCCuster, Dawson, Fallon, Garfield, Prairie, Rosebud and 1 more35 min
Jul 11, 11:48 AM MDTMesoscale DiscussionSPCBlaine, Carter, Custer, Daniels, Dawson, Fallon and 8 more117 min
Jul 11, 1:52 PM MDTMesoscale DiscussionSPCBig Horn, Blaine, Carbon, Carter, Chouteau, Custer and 19 more83 min
Jul 11, 2:40 PM MDTSevere Thunderstorm WatchSPCBig Horn, Carter, Custer, Daniels, Dawson, Fallon and 12 more6 hr
Jul 11, 5:34 PM MDTMesoscale DiscussionSPCBig Horn, Carter, Custer, Daniels, Dawson, Fallon and 14 more86 min
Jul 10, 7:51 PM MDTMesoscale DiscussionSPCBarnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more54 min
Jul 10, 8:10 PM MDTSevere Thunderstorm WatchSPCCass, Ransom, Richland, Sargent, Steele, Traill6 hr
Jul 10, 10:19 PM MDTMesoscale DiscussionSPCRichland116 min
Jul 10, 8:02 PM MDTMesoscale DiscussionSPCAurora, Beadle, Brule, Buffalo, Clark, Davison and 12 more118 min
Jul 11, 12:43 PM MDTMesoscale DiscussionSPCBennett, Butte, Custer, Fall River, Haakon, Jackson and 5 more2 hr

Nearby

Mesoscale Discussions in Montana, 2004Mesoscale Discussions in North Dakota, 2004Mesoscale Discussions in South Dakota, 2004Every mesoscale discussion in 2004

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.