Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1697

July 15, 200410 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2004, 5:08 PM MDT for 10 counties in Nebraska. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 15, 2004, 5:08 PM MDT (23:08 UTC)
Expired: Jul 15, 2004, 6:45 PM MDT
In force: 97 min
Issued by: the Storm Prediction Center

Counties Chase County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Hayes County, NE, Hitchcock County, NE, Perkins County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 151 km from the middle of the area, began a volume at 23:08 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.

Severe Thunderstorm Watch 644Jul 15, 5:25 PM MDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.1 hours before the alert went out and 66 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: 1600 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 1216 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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
Jul 14, 6:49 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Kimball and 3 more	86 min
Jul 15, 8:32 AM MDT	Mesoscale Discussion	SPC	Dakota, Dixon	118 min
Jul 15, 10:55 AM MDT	Mesoscale Discussion	SPC	Antelope, Boyd, Burt, Butler, Cass, Cedar and 26 more	2 hr
Jul 15, 1:03 PM MDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Boyd, Brown, Cedar and 22 more	2 hr
Jul 15, 1:53 PM MDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 12 more	3 hr
Jul 15, 2:00 PM MDT	Tornado Watch	SPC	Antelope, Boone, Boyd, Buffalo, Butler, Cedar and 23 more	6 hr
Jul 15, 4:04 PM MDT	Mesoscale Discussion	SPC	Dundy	86 min
Jul 15, 5:25 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Chase, Dawson, Deuel, Dundy and 15 more	7 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.