Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 2100

August 24, 200417 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 24, 2004, 10:41 PM CDT for 17 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 24, 2004, 10:41 PM CDT (03:41 UTC)
Expired: Aug 25, 2004, 12:45 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Boone County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Frontier County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hayes County, NE, Holt County, NE, Howard County, NE, Lincoln County, NE, Loup County, NE, Rock County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 95 km from the middle of the area, began a volume at 03:43 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 nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.7 hours before the alert went out and 46 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: 277 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 2557 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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
Aug 24, 8:20 PM CDT	Severe Thunderstorm Watch	SPC	Gage, Jefferson, Johnson, Nemaha, Pawnee, Richardson and 1 more	7 hr
Aug 24, 11:47 PM CDT	Mesoscale Discussion	SPC	Gage, Johnson, Nemaha, Pawnee, Richardson	118 min
Aug 25, 1:44 AM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Butler, Clay and 23 more	91 min
Aug 25, 8:50 AM CDT	Severe Thunderstorm Watch	SPC	Cass, Fillmore, Gage, Jefferson, Johnson, Lancaster and 6 more	5 hr

Nearby

Mesoscale Discussions in Nebraska, 2004 Every 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.