Alert archive / Nebraska / Mesoscale Discussions in 2020

Mesoscale Discussion 805

June 3, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2020, 8:54 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 3, 2020, 8:54 PM CDT (01:54 UTC)
Expired
Jun 3, 2020, 11:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 246
All 44 counties

Fremont County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Doniphan County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Phillips County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Smith County, KS, Washington County, KS, Atchison County, MO, Holt County, MO, Adams County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Richardson County, NE, Saline County, NE, Seward County, NE, Thayer County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 75 km from the middle of the area, began a volume at 01:58 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.9 hours before the alert went out and 174 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2020-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 195 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2020-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -49 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
195 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
2702 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-49 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.8

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.

IssuedProductOfficeCountiesLasted
Jun 3, 10:44 PM CDTMesoscale DiscussionSPCFremont2 hr
Jun 4, 12:59 PM CDTMesoscale DiscussionSPCAudubon, Benton, Black Hawk, Boone, Buchanan, Buena Vista and 29 more61 min
Jun 4, 5:14 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 61 more91 min
Jun 3, 9:38 PM CDTSevere Thunderstorm WatchSPCAnderson, Atchison, Brown, Clay, Cloud, Coffey and 22 more6 hr
Jun 4, 12:54 AM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Butler and 32 more96 min
Jun 4, 2:07 AM CDTSevere Thunderstorm WatchSPCAllen, Bourbon, Cherokee, Crawford, Labette, Linn and 4 more5 hr
Jun 4, 3:32 AM CDTMesoscale DiscussionSPCAllen, Bourbon, Cherokee, Crawford, Linn, Neosho and 2 more88 min
Jun 4, 5:23 PM CDTMesoscale DiscussionSPCDecatur, Rawlins, Sheridan, Thomas2 hr
Jun 4, 5:44 AM CDTMesoscale DiscussionSPCBarry, Christian, Stone, Taney61 min
Jun 4, 2:42 PM CDTMesoscale DiscussionSPCMississippi, Scott2 hr
Jun 4, 2:25 PM CDTMesoscale DiscussionSPCBoyd, Brown, Cherry, Keya Paha, Rock95 min
Jun 4, 6:55 PM CDTMesoscale DiscussionSPCKeya Paha95 min

Nearby

Mesoscale Discussions in Nebraska, 2020Mesoscale Discussions in Kansas, 2020Mesoscale Discussions in Missouri, 2020Every mesoscale discussion in 2020

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.