Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 556

April 24, 20079 counties in Kansas; 14 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2007, 5:03 AM CDT for 9 counties in Kansas; 14 counties in Nebraska. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Apr 24, 2007, 5:03 AM CDT (10:03 UTC)
Expired
Apr 24, 2007, 6:30 AM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 23 counties

Graham County, KS, Jewell County, KS, Lincoln County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rooks County, KS, Smith County, KS, Adams County, NE, Buffalo County, NE, Clay County, NE, Dawson County, NE, Franklin County, NE, Furnas County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Kearney County, NE, Nuckolls County, NE, Phelps County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 32 km from the middle of the area, began a volume at 10:06 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, 10.1 hours before the alert went out and 179 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 2007-04-24Temperature 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 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 2007-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.1939587897Sfc1 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
1952 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
288 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
Apr 23, 8:54 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Cheyenne, Clark, Comanche and 55 more2 hr
Apr 23, 9:53 PM CDTSevere Thunderstorm WatchSPCJewell, Mitchell, Osborne, Phillips, Rooks, Smith8 hr
Apr 23, 10:41 PM CDTTornado WatchSPCCheyenne, Decatur, Graham, Norton, Rawlins, Sheridan and 2 more5 hr
Apr 24, 1:37 AM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more83 min
Apr 24, 10:04 AM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 40 more116 min
Apr 24, 10:48 AM CDTTornado WatchSPCBarber, Barton, Butler, Chase, Chautauqua, Clay and 41 more10 hr
Apr 24, 2:03 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Cherokee and 26 more87 min
Apr 24, 2:48 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Logan, Rawlins, Sheridan and 3 more117 min
Apr 24, 3:24 PM CDTTornado WatchSPCAllen, Anderson, Atchison, Bourbon, Brown, Cherokee and 24 more5 hr
Apr 24, 3:37 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Chautauqua, Clay and 33 more83 min
Apr 24, 6:13 PM CDTMesoscale DiscussionSPCButler, Chase, Chautauqua, Clay, Cloud, Cowley and 17 more62 min
Apr 24, 1:35 PM CDTMesoscale DiscussionSPCAdams, Buffalo, Butler, Cass, Clay, Custer and 34 more55 min
Apr 24, 1:48 PM CDTSevere Thunderstorm WatchSPCAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 21 more5 hr

Nearby

Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Kansas, 2007Every mesoscale discussion in 2007

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.