Alert archive / Nebraska / Mesoscale Discussions in 2023

Mesoscale Discussion 1839

August 4, 20236 counties in Kansas; 22 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2023, 9:09 PM CDT for 6 counties in Kansas; 22 counties in Nebraska. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Aug 4, 2023, 9:09 PM CDT (02:09 UTC)
Expired: Aug 4, 2023, 10:45 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 586

All 28 counties

Decatur County, KS, Graham County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Smith County, KS, Blaine County, NE, Brown County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Harlan County, NE, Hitchcock County, NE, Holt County, NE, Kearney County, NE, Loup County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 138 km from the middle of the area, began a volume at 02:09 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, 2.2 hours before the alert went out and 62 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: 1434 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1596 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 4, 11:40 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Finney, Gove, Graham, Grant and 17 more	2 hr
Aug 5, 4:11 AM CDT	Mesoscale Discussion	SPC	Barber, Butler, Chautauqua, Comanche, Cowley, Elk and 9 more	2 hr
Aug 5, 4:25 AM CDT	Severe Thunderstorm Watch	SPC	Butler, Chautauqua, Cowley, Elk, Greenwood, Harper and 7 more	5 hr
Aug 5, 7:43 AM CDT	Mesoscale Discussion	SPC	Chautauqua, Cherokee, Crawford, Elk, Labette, Montgomery and 2 more	2 hr
Aug 5, 5:22 PM CDT	Mesoscale Discussion	SPC	Finney, Gove, Graham, Grant, Gray, Greeley and 12 more	83 min
Aug 5, 5:47 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Cheyenne, Clark, Comanche, Decatur, Edwards and 40 more	7 hr
Aug 5, 2:10 PM CDT	Mesoscale Discussion	SPC	Burt, Cass, Cedar, Cuming, Dakota, Dixon and 9 more	95 min
Aug 5, 3:01 PM CDT	Tornado Watch	SPC	Antelope, Burt, Cedar, Colfax, Cuming, Dakota and 10 more	7 hr

Nearby

Mesoscale Discussions in Nebraska, 2023 Mesoscale Discussions in Kansas, 2023 Every mesoscale discussion in 2023

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.