Alert archive / Nebraska / Mesoscale Discussions in 2024

Mesoscale Discussion 862

May 20, 2024Yuma County, Colorado; Cheyenne County, Kansas; 5 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 20, 2024, 9:59 PM MDT for Yuma County, Colorado; Cheyenne County, Kansas; 5 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 20, 2024, 9:59 PM MDT (03:59 UTC)
Expired
May 21, 2024, 12:00 AM MDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Tornado watch 269...273

Counties Yuma County, CO, Cheyenne County, KS, Chase County, NE, Dundy County, NE, Hayes County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 101 km from the middle of the area, began a volume at 03:59 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, 4.0 hours before the alert went out and 133 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 2024-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 248 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 2024-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939587897117Sfc1 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
248 J/kg
Mixed-layer CIN
-191 J/kg
Mixed-layer LCL
1142 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
296 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.0

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 20, 6:13 PM MDTMesoscale DiscussionSPCPhillips, Washington, Yuma2 hr
May 20, 8:01 PM MDTTornado WatchSPCYuma6 hr
May 20, 7:25 PM MDTMesoscale DiscussionSPCCheyenne, Decatur, Norton, Rawlins95 min
May 20, 10:33 PM MDTSevere Thunderstorm WatchSPCPhillips, Smith9 hr
May 21, 12:29 AM MDTMesoscale DiscussionSPCCheyenne, Decatur, Rawlins61 min
May 21, 1:04 AM MDTMesoscale DiscussionSPCNorton116 min
May 21, 1:15 PM MDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Cherokee, Crawford, Douglas and 11 more2 hr
May 21, 1:40 PM MDTTornado WatchSPCAllen, Anderson, Atchison, Bourbon, Cherokee, Crawford and 11 more7 hr
May 20, 9:01 PM MDTMesoscale DiscussionSPCCass, Dodge, Douglas, Sarpy, Saunders, Seward and 1 more119 min
May 21, 3:08 AM MDTMesoscale DiscussionSPCAdams, Burt, Butler, Cass, Clay, Colfax and 20 more2 hr
May 21, 4:51 AM MDTMesoscale DiscussionSPCBurt, Cass, Cuming, Dodge, Douglas, Lancaster and 5 more114 min
May 21, 9:27 AM MDTMesoscale DiscussionSPCBurt, Cass, Cuming, Dakota, Dodge, Douglas and 11 more2 hr
May 21, 10:10 AM MDTTornado WatchSPCBurt, Butler, Cass, Cedar, Colfax, Cuming and 19 more5 hr

Nearby

Mesoscale Discussions in Nebraska, 2024Mesoscale Discussions in Colorado, 2024Mesoscale Discussions in Kansas, 2024Every mesoscale discussion in 2024

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.