Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 1463

July 12, 20077 counties in Colorado; 46 counties in Nebraska; 4 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2007, 5:36 PM MDT for 7 counties in Colorado; 46 counties in Nebraska; 4 counties in Wyoming. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Jul 12, 2007, 5:36 PM MDT (23:36 UTC)
Expired
Jul 12, 2007, 6:30 PM MDT
In force
54 min
Issued by
the Storm Prediction Center
All 57 counties

Boulder County, CO, Larimer County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Weld County, CO, Adams County, NE, Arthur County, NE, Banner County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Chase County, NE, Cheyenne County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Fillmore County, NE, Frontier County, NE, Garden County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Hayes County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Morrill County, NE, Nance County, NE, Perkins County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Scotts Bluff County, NE, Seward County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE, York County, NE, Albany County, WY, Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Goodland radar (KGLD), 152 km from the middle of the area, began a volume at 23:36 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.6 hours before the alert went out and 116 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, N. Platte/Lee Bi, NE at 12:00Z on 2007-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 213 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, N. Platte/Lee Bi, NE at 12:00Z on 2007-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
213 J/kg
Mixed-layer CIN
-205 J/kg
Mixed-layer LCL
1092 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 11, 6:12 PM MDTTornado WatchSPCAdams, Arapahoe, Cheyenne, Kit Carson, Logan, Morgan and 5 more6 hr
Jul 11, 8:38 PM MDTMesoscale DiscussionSPCCheyenne, Kit Carson, Logan, Morgan, Phillips, Washington and 2 more97 min
Jul 11, 9:17 PM MDTMesoscale DiscussionSPCBaca, Bent, Crowley, Elbert, El Paso, Huerfano and 7 more88 min
Jul 12, 12:36 PM MDTMesoscale DiscussionSPCLogan, Phillips, Sedgwick, Weld84 min
Jul 12, 1:03 PM MDTSevere Thunderstorm WatchSPCBoulder, Larimer, Logan, Morgan, Phillips, Sedgwick and 2 more7 hr
Jul 12, 3:55 PM MDTMesoscale DiscussionSPCCheyenne, Elbert, Kit Carson, Lincoln, Washington, Yuma95 min
Jul 12, 4:19 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Cheyenne, Elbert, Kit Carson, Lincoln and 1 more7 hr

Nearby

Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Colorado, 2007Mesoscale Discussions in Wyoming, 2007Every mesoscale discussion in 2007

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.