Alert archive / Nebraska / Mesoscale Discussions in 2019

Mesoscale Discussion 554

May 6, 20198 counties in Kansas; 19 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 6, 2019, 1:16 PM CDT for 8 counties in Kansas; 19 counties in Nebraska. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: May 6, 2019, 1:16 PM CDT (18:16 UTC)
Expired: May 6, 2019, 3:15 PM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 27 counties

Cloud County, KS, Jewell County, KS, Mitchell County, KS, Osborne County, KS, Phillips County, KS, Republic County, KS, Smith County, KS, Washington County, KS, Adams County, NE, Buffalo County, NE, Clay County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Jefferson County, NE, Kearney County, NE, Nuckolls County, NE, Phelps County, NE, Saline County, NE, Thayer County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 7 km from the middle of the area, began a volume at 18:16 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 139May 6, 3:50 PM CDT

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 6.3 hours before the alert went out and 275 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1527 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 72 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 5, 7:17 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Edwards, Ford and 15 more	58 min
May 5, 9:18 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 14 more	57 min
May 5, 9:19 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Elk, Montgomery, Wilson	56 min
May 5, 9:41 PM CDT	Severe Thunderstorm Watch	SPC	Chautauqua, Elk, Greenwood, Montgomery, Wilson	6 hr
May 6, 3:47 PM CDT	Mesoscale Discussion	SPC	Barton, Dickinson, Ellsworth, Finney, Hodgeman, Lane and 7 more	88 min
May 6, 3:49 PM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Clay, Dickinson, Doniphan, Geary and 14 more	5 hr
May 6, 5:08 PM CDT	Mesoscale Discussion	SPC	Anderson, Atchison, Brown, Chase, Clay, Coffey and 24 more	97 min
May 6, 5:13 PM CDT	Tornado Watch	SPC	Allen, Anderson, Barton, Butler, Chase, Coffey and 22 more	7 hr
May 6, 5:48 PM CDT	Mesoscale Discussion	SPC	Clark, Finney, Ford, Grant, Gray, Hamilton and 9 more	87 min
May 6, 6:46 PM CDT	Tornado Watch	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 19 more	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2019 Mesoscale Discussions in Kansas, 2019 Every mesoscale discussion in 2019

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.