Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 978

May 22, 200821 counties in Nebraska; Goshen County, Platte County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at May 22, 2008, 8:24 PM MDT for 21 counties in Nebraska; Goshen County, Platte County, Wyoming. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
May 22, 2008, 8:24 PM MDT (02:24 UTC)
Expired
May 22, 2008, 9:30 PM MDT
In force
66 min
Issued by
the Storm Prediction Center
All 23 counties

Arthur County, NE, Banner County, NE, Blaine County, NE, Box Butte County, NE, Brown County, NE, Cherry County, NE, Custer County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keya Paha County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Morrill County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Goshen County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 190 km from the middle of the area, began a volume at 02:24 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, 2.4 hours before the alert went out and 224 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 2008-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 169 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 2008-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 336 square meters per square second.19395878Sfc1 km3 km6 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
169 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
489 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
336 m²/s²
0-3 km storm-relative helicity
418 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.7

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 22, 7:16 PM MDTMesoscale DiscussionSPCAdams, Buffalo, Chase, Clay, Dawson, Deuel and 25 more29 min
May 22, 8:11 PM MDTTornado WatchSPCAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 11 more8 hr
May 22, 9:34 PM MDTMesoscale DiscussionSPCBoone, Butler, Cass, Colfax, Dodge, Douglas and 16 more56 min
May 22, 10:43 PM MDTMesoscale DiscussionSPCAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 14 more62 min
May 23, 1:01 AM MDTMesoscale DiscussionSPCJefferson, Nuckolls, Saline, Thayer89 min
May 23, 8:53 AM MDTMesoscale DiscussionSPCAdams, Arthur, Banner, Blaine, Box Butte, Buffalo and 31 more67 min
May 23, 12:13 PM MDTMesoscale DiscussionSPCKimball92 min
May 23, 12:41 PM MDTTornado WatchSPCBanner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more6 hr
May 23, 1:15 PM MDTTornado Watch PDSSPCChase, Dundy, Frontier, Furnas, Gosper, Harlan and 4 more7 hr
May 23, 4:26 PM MDTMesoscale DiscussionSPCAdams, Boone, Buffalo, Butler, Clay, Colfax and 23 more64 min
May 23, 5:02 PM MDTMesoscale DiscussionSPCBanner, Box Butte, Cheyenne, Dawes, Deuel, Kimball and 3 more58 min
May 23, 5:18 PM MDTMesoscale DiscussionSPCChase, Dundy, Frontier, Furnas, Gosper, Harlan and 4 more57 min
May 23, 5:37 PM MDTMesoscale DiscussionSPCBanner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 4 more23 min

Nearby

Mesoscale Discussions in Nebraska, 2008Mesoscale Discussions in Wyoming, 2008Every mesoscale discussion in 2008

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.