Alert archive / Nebraska / Mesoscale Discussions in 2013

Mesoscale Discussion 843

May 28, 20134 states

The Storm Prediction Center issued this mesoscale discussion at May 28, 2013, 5:05 PM MDT for 4 states. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
May 28, 2013, 5:05 PM MDT (23:05 UTC)
Expired
May 28, 2013, 7:00 PM MDT
In force
115 min
Issued by
the Storm Prediction Center
All 30 counties

Adams County, CO, Elbert County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Sherman County, KS, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD

The radar

The Cheyenne radar (KCYS), 146 km from the middle of the area, began a volume at 23:05 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

Denver, CO (KDNR), launched 12:00Z, 11.1 hours before the alert went out and 122 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, Denver, CO at 12:00Z on 2013-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2013-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
2778 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 2:08 PM MDTMesoscale DiscussionSPCCheyenne, Kiowa, Kit Carson, Logan, Morgan, Phillips and 3 more2 hr
May 28, 2:51 PM MDTSevere Thunderstorm WatchSPCLogan, Morgan, Phillips, Sedgwick, Washington, Yuma9 hr
May 27, 7:18 PM MDTMesoscale DiscussionSPCClay, Cloud, Dickinson, Ellsworth, Geary, Jewell and 10 more117 min
May 27, 8:07 PM MDTMesoscale DiscussionSPCAtchison, Brown, Clay, Cloud, Dickinson, Doniphan and 21 more53 min
May 27, 8:31 PM MDTSevere Thunderstorm WatchSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Johnson and 3 more7 hr
May 27, 9:23 PM MDTMesoscale DiscussionSPCBrown, Marshall, Nemaha, Pottawatomie, Riley, Washington67 min
May 27, 10:19 PM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 3 more116 min
May 28, 12:37 PM MDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Chase and 32 more113 min
May 28, 1:23 PM MDTTornado WatchSPCAtchison, Barton, Brown, Clay, Cloud, Coffey and 29 more8 hr
May 28, 1:28 PM MDTMesoscale DiscussionSPCBarber, Clark, Comanche, Kiowa, Pratt62 min
May 28, 1:55 PM MDTSevere Thunderstorm WatchSPCBarber, Clark, Comanche, Edwards, Ford, Kiowa and 5 more9 hr
May 28, 4:52 PM MDTMesoscale DiscussionSPCAtchison, Brown, Clay, Dickinson, Doniphan, Geary and 11 more83 min
May 27, 7:39 PM MDTMesoscale DiscussionSPCBlaine, Brown, Custer, Dawson, Frontier, Lincoln and 3 more96 min
May 27, 6:11 PM MDTMesoscale DiscussionSPCBennett, Custer, Dewey, Fall River, Haakon, Hughes and 12 more94 min

Nearby

Mesoscale Discussions in Nebraska, 2013Mesoscale Discussions in Colorado, 2013Mesoscale Discussions in Kansas, 2013Every mesoscale discussion in 2013

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.