Alert archive / Nebraska / Mesoscale Discussions in 2017

Mesoscale Discussion 678

May 10, 20174 states

The Storm Prediction Center issued this mesoscale discussion at May 10, 2017, 1:29 AM CDT for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
May 10, 2017, 1:29 AM CDT (06:29 UTC)
Expired
May 10, 2017, 2:30 AM CDT
In force
61 min
Issued by
the Storm Prediction Center
All 67 counties

Fremont County, IA, Mills County, IA, Cheyenne County, KS, Decatur County, KS, Ellis County, KS, Gove County, KS, Graham County, KS, Jewell County, KS, Marshall County, KS, Nemaha County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rawlins County, KS, Republic County, KS, Rooks County, KS, Sheridan County, KS, Smith County, KS, Trego County, KS, Washington County, KS, Atchison County, MO, Adams County, NE, Buffalo County, NE, Butler County, NE, Cass County, NE, Chase County, NE, Clay County, NE, Dawson County, NE, Douglas County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Lincoln County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Perkins County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 41 km from the middle of the area, began a volume at 06:29 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, 6.5 hours before the alert went out and 167 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, N. Platte/Lee Bi, NE at 00:00Z on 2017-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, N. Platte/Lee Bi, NE at 00:00Z on 2017-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1700 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
178 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.

IssuedProductOfficeCountiesLasted
May 10, 12:05 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Des Moines, Henry, Jefferson, Keokuk and 10 more2 hr
May 10, 12:59 PM CDTSevere Thunderstorm WatchSPCAppanoose, Clarke, Davis, Decatur, Des Moines, Henry and 15 more7 hr
May 10, 3:48 PM CDTMesoscale DiscussionSPCLee87 min
May 9, 7:15 PM CDTMesoscale DiscussionSPCCloud, Jewell, Marshall, Mitchell, Osborne, Phillips and 4 more2 hr
May 9, 9:32 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Gove, Graham, Grant and 16 more58 min
May 10, 6:04 AM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman116 min
May 10, 12:39 PM CDTMesoscale DiscussionSPCBourbon, Franklin, Johnson, Leavenworth, Linn, Miami and 1 more3 hr
May 10, 3:11 PM CDTMesoscale DiscussionSPCGrant, Haskell, Morton, Seward, Stevens94 min
May 10, 3:37 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 10 more113 min
May 10, 6:30 PM CDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford2 hr

Nearby

Mesoscale Discussions in Nebraska, 2017Mesoscale Discussions in Kansas, 2017Mesoscale Discussions in Iowa, 2017Every mesoscale discussion in 2017

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.