Mesoscale Discussion 1021

Issued

Jun 7, 2026, 8:15 PM MDT (02:15 UTC)

Expired

Jun 7, 2026, 9:15 PM MDT

In force

60 min

Issued by

the Storm Prediction Center

Concerning

Severe potential...watch unlikely

Chance of a watch

20%

Counties Arthur County, NE, Cheyenne County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Morrill County, NE

The North Platte radar (KLNX), 182 km from the middle of the area, began a volume at 02:15 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.

957 
ACUS11 KWNS 080216
SWOMCD
SPC MCD 080215 
NEZ000-COZ000-080315-

Mesoscale Discussion 1021
NWS Storm Prediction Center Norman OK
0915 PM CDT Sun Jun 07 2026

Areas affected...portions of western Nebraska and far northeastern
Colorado

Concerning...Severe potential...Watch unlikely 

Valid 080215Z - 080315Z

Probability of Watch Issuance...20 percent

SUMMARY...A cluster of storms may produce a few severe gusts and
large hail this evening across portions of western Nebraska and far
northeastern Colorado. A watch is not likely at this time.

DISCUSSION...Storms are ongoing across western Nebraska this evening
south of a mid-level jet and associated surface low, situated across
southwestern South Dakota. The 00Z LBF RAOB showed generally weak
winds through the depth of the column but generally steep lapse
rates. Relatively low boundary-layer relative humidity may
contribute to a threat for severe gusts, and the steep lapse rates
may result in a threat for large hail, though modest deep-layer
shear may limit this threat. Storm coverage should generally decline
with loss of diurnal heating and associated increase in inhibition.
However, moist south-southeasterlies and the development of a
low-level jet with boundary-layer decoupling may allow the cluster
of storms to persist for a couple hours after sunset. Due to the
short duration and localized nature of this threat, a watch is
unlikely at this time.

..Supinie/Gleason.. 06/08/2026

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...LBF...BOU...CYS...

LAT...LON   41150361 41480353 41870306 42030219 42050159 41660129
            41300178 41030226 40910283 40900331 41150361 

MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN

Mesoscale Discussions in Nebraska, 2026Every mesoscale discussion in 2026

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.