Alert archive / Nebraska / Mesoscale Discussions in 2022

Mesoscale Discussion 737

May 12, 202217 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 12, 2022, 2:42 PM CDT for 17 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 12, 2022, 2:42 PM CDT (19:42 UTC)
Expired: May 12, 2022, 4:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 206

Counties Antelope County, NE, Boone County, NE, Cedar County, NE, Garfield County, NE, Greeley County, NE, Howard County, NE, Knox County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Sherman County, NE, Stanton County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE

The radar

The Grand Island radar (KUEX), 158 km from the middle of the area, began a volume at 19:43 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

Omaha, NE (KOAX), launched 12:00Z, 7.7 hours before the alert went out and 166 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: 1555 J/kg
Mixed-layer CIN: -323 J/kg
Mixed-layer LCL: 1486 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: -52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
May 11, 11:50 PM CDT	Mesoscale Discussion	SPC	Boyd, Keya Paha, Rock	115 min
May 12, 1:39 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Cedar and 27 more	3 hr
May 12, 2:14 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Burt and 52 more	8 hr
May 12, 3:27 PM CDT	Severe Thunderstorm Watch PDS	SPC	Dakota, Dixon	7 hr
May 12, 4:32 PM CDT	Mesoscale Discussion	SPC	Cedar, Dixon	58 min
May 12, 5:07 PM CDT	Mesoscale Discussion	SPC	Butler, Cass, Clay, Colfax, Dodge, Douglas and 17 more	53 min
May 12, 5:43 PM CDT	Mesoscale Discussion	SPC	Franklin, Furnas, Gosper, Harlan, Kearney, Phelps	62 min
May 12, 6:12 PM CDT	Mesoscale Discussion	SPC	Burt, Butler, Colfax, Cuming, Dakota, Dodge and 7 more	63 min

Nearby

Mesoscale Discussions in Nebraska, 2022 Every mesoscale discussion in 2022

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.