Alert archive / Nebraska / Mesoscale Discussions in 2024

Mesoscale Discussion 1349

June 20, 20246 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2024, 6:33 PM CDT for 6 counties in Nebraska. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jun 20, 2024, 6:33 PM CDT (23:33 UTC)
Expired: Jun 20, 2024, 8:00 PM CDT
In force: 87 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 440

Counties Brown County, NE, Cherry County, NE, Grant County, NE, Morrill County, NE, Rock County, NE, Sheridan County, NE

The radar

The North Platte radar (KLNX), 67 km from the middle of the area, began a volume at 23:34 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 12:00Z, 11.6 hours before the alert went out and 131 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: 457 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 269 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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
Jun 20, 1:43 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cherry, Cheyenne, Dawes and 12 more	92 min
Jun 20, 2:23 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more	6 hr
Jun 20, 4:42 PM CDT	Mesoscale Discussion	SPC	Boyd, Brown, Holt, Keya Paha, Loup, Rock	93 min
Jun 20, 4:57 PM CDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Boyd, Brown, Cherry, Garfield and 10 more	7 hr
Jun 20, 5:15 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Garden, Kimball, Morrill and 2 more	90 min

Nearby

Mesoscale Discussions in Nebraska, 2024 Every mesoscale discussion in 2024

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.