Alert archive / North Dakota / Mesoscale Discussions in 2004

Mesoscale Discussion 1615

July 11, 200414 counties in Montana; 23 counties in North Dakota; Harding County, Perkins County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2004, 11:48 AM MDT for 14 counties in Montana; 23 counties in North Dakota; Harding County, Perkins County, South Dakota. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Jul 11, 2004, 11:48 AM MDT (17:48 UTC)
Expired
Jul 11, 2004, 1:45 PM MDT
In force
117 min
Issued by
the Storm Prediction Center
All 39 counties

Blaine County, MT, Carter County, MT, Custer County, MT, Daniels County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Phillips County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Renville County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Williams County, ND, Harding County, SD, Perkins County, SD

The radar

The Glasgow radar (KGGW), 208 km from the middle of the area, began a volume at 17:51 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 12:00Z, 5.8 hours before the alert went out and 208 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 12:00Z on 2004-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 98 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, Glasgow Intl Airport, MT at 12:00Z on 2004-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
98 J/kg
Mixed-layer CIN
-523 J/kg
Mixed-layer LCL
1856 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
221 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
Jul 10, 6:56 PM MDTMesoscale DiscussionSPCBlaine, Carter, Cascade, Chouteau, Custer, Dawson and 21 more94 min
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, 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 North Dakota, 2004Mesoscale Discussions in Montana, 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.