Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 337

March 24, 20074 counties in Colorado; 11 counties in Kansas; 18 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Mar 24, 2007, 4:42 PM MDT for 4 counties in Colorado; 11 counties in Kansas; 18 counties in Nebraska. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Mar 24, 2007, 4:42 PM MDT (22:42 UTC)
Expired: Mar 24, 2007, 6:15 PM MDT
In force: 93 min
Issued by: the Storm Prediction Center

All 33 counties

Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Graham County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Thomas County, KS, Adams County, NE, Buffalo County, NE, Chase County, NE, Dawson County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Kearney County, NE, Lincoln County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Webster County, NE

The radar

The Goodland radar (KGLD), 117 km from the middle of the area, began a volume at 22:45 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.7 hours before the alert went out and 110 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1024 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 116 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.

Issued	Product	Office	Counties	Lasted
Mar 23, 6:29 PM MDT	Mesoscale Discussion	SPC	Adams, Logan, Morgan, Phillips, Sedgwick, Washington and 2 more	2 hr
Mar 23, 7:09 PM MDT	Severe Thunderstorm Watch	SPC	Barton, Ellsworth, Harvey, Kingman, Lincoln, McPherson and 4 more	4 hr
Mar 23, 7:19 PM MDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Edwards, Finney and 14 more	116 min
Mar 23, 10:04 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Ellis, Gove, Graham, Logan and 10 more	2 hr
Mar 24, 1:14 AM MDT	Mesoscale Discussion	SPC	Jewell, Republic, Smith, Washington	91 min
Mar 24, 5:15 PM MDT	Tornado Watch	SPC	Cheyenne, Decatur, Norton, Rawlins	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2007 Mesoscale Discussions in Kansas, 2007 Mesoscale Discussions in Colorado, 2007 Every 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.