Alert archive / Nebraska / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 101, NWS North Platte, NE

June 20, 2026Grant County, Hooker County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 20, 2026, 6:40 PM MDT for Grant County, Hooker County, Nebraska. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 20, 2026, 6:40 PM MDT (00:40 UTC)
Expired
Jun 20, 2026, 7:06 PM MDT
In force
26 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Grant County, NE, Hooker County, NE

The radar

The North Platte radar (KLNX), 87 km from the middle of the area, began a volume at 00:39 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.7 hours before the alert went out and 125 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 2026-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 314 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 2026-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 302 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
314 J/kg
Mixed-layer CIN
-317 J/kg
Mixed-layer LCL
686 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
302 m²/s²
0-3 km storm-relative helicity
816 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.0

Open this sounding in Storm Lab

The text

As transmitted.

487 
WUUS53 KLBF 210040
SVRLBF
NEC075-091-210130-
/O.NEW.KLBF.SV.W.0101.260621T0040Z-260621T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
640 PM MDT Sat Jun 20 2026

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northeastern Grant County in west central Nebraska...
  Northwestern Hooker County in west central Nebraska...

* Until 730 PM MDT.

* At 640 PM MDT, a severe thunderstorm was located near Ashby, or 30
  miles northwest of Arthur, moving east at 40 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Hyannis, Whitman, Carr Lake, Pratt Lake, Duluth, and Weir.

This includes the following highways...
 Highway 2 between mile markers 140 and 174.
 Highway 61 between mile markers 147 and 165.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4187 10188 4209 10189 4209 10124 4185 10124
TIME...MOT...LOC 0040Z 267DEG 36KT 4195 10198 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brown
2 follow-up statements
167 
WWUS53 KLBF 210100
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
700 PM MDT Sat Jun 20 2026

NEC075-091-210130-
/O.CON.KLBF.SV.W.0101.000000T0000Z-260621T0130Z/
Grant NE-Hooker NE-
700 PM MDT Sat Jun 20 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT
FOR NORTHEASTERN GRANT AND NORTHWESTERN HOOKER COUNTIES...

At 700 PM MDT, a severe thunderstorm was located over Hyannis, or 28
miles north of Arthur, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Hyannis, Whitman, Carr Lake, Pratt Lake, Duluth, and Weir.

This includes the following highways...
 Highway 2 between mile markers 140 and 174.
 Highway 61 between mile markers 147 and 165.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4187 10188 4209 10189 4209 10124 4185 10124
TIME...MOT...LOC 0100Z 262DEG 35KT 4198 10172 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brown
739 
WWUS53 KLBF 210106
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
706 PM MDT Sat Jun 20 2026

NEC075-091-210116-
/O.CAN.KLBF.SV.W.0101.000000T0000Z-260621T0130Z/
Grant NE-Hooker NE-
706 PM MDT Sat Jun 20 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRANT AND
NORTHWESTERN HOOKER COUNTIES IS CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight MDT for
west central Nebraska.

LAT...LON 4187 10188 4209 10189 4209 10124 4185 10124
TIME...MOT...LOC 0104Z 267DEG 36KT 4198 10164 

$$

Brown

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 5:42 PM MDT, 58 minutes earlier. Its key messages:

  • Widespread thunderstorms are expected across across western to north central Nebraska through Saturday evening. A few storms could be severe, with large to very large hail, severe winds (some 75+ mph), locally heavy rainfall, and a tornado or two could be possible.
  • Isolated to scattered thunderstorms will again be possible Sunday afternoon and evening across western and north central Nebraska. A few storms could be severe with large hail and a brief tornado or two being the primary concerns.
  • Near-daily thunderstorm chances continue into the week but severe potential remains uncertain at this time.
Area forecast discussion, Jun 20, 5:42 PM MDT, 58 minutes before
Area Forecast Discussion
National Weather Service North Platte NE
Issued by National Weather Service Quad Cities IA IL
642 PM CDT Sat Jun 20 2026

.KEY MESSAGES...

- Widespread thunderstorms are expected across across western
  to north central Nebraska through Saturday evening. A few
  storms could be severe, with large to very large hail, severe
  winds (some 75+ mph), locally heavy rainfall, and a tornado or
  two could be possible.

- Isolated to scattered thunderstorms will again be possible Sunday
afternoon and evening across western and north central Nebraska. A
few storms could be severe with large hail and a brief tornado or
two being the primary concerns.

- Near-daily thunderstorm chances continue into the week but
  severe potential remains uncertain at this time.

&&

.SHORT TERM /THROUGH SUNDAY NIGHT/...
Issued at 325 PM CDT Sat Jun 20 2026

A warm front has been nudging in from southwest Nebraska, promoting
easterly flow and scattered thunderstorm throughout the morning.
Later on in the day, a shortwave trough is trekking eastward across
the Utah/Idaho border, at the same time, southeasterly low level
winds are feeding warm, moist air into the area. As low level clouds
and fog continue to burn off through the late afternoon, the region
will be primed for the development of widespread strong to severe
thunderstorms late afternoon into the early evening. The environment
is conducive for a persistent threat for clusters of severe storms.
Ensembles have a swathe of MUCAPE in the 1500 to 2500 J/kg along
with sufficient 0-6 km bulk shear of 50 - 60 kts blanketing western
and north central Nebraska which would be a conducive environment
for the potential of large hail. Models have been a little
disagreeable for how far north storms will develop, but show
moderate to high agreement for storms developing along and south of
I-80, where clustering of storms will move across and become more
upscale. Confidence remains lower on how organized storms could be
further north where some models have it being widespread where
others are nonexistent. A tornado threat cannot be ruled out
especially over far southwest Nebraska where low clouds have
already started to clear out. Additionally, a threat of
localized flooding is developing with PWAT values remaining high
and a growing number of models suggesting a swath of 2 - 4" of
QPF across central Nebraska through tonight, a flood advisory
has been issued for Custer county to highlight this concern.

Transitioning to Sunday, strong to severe thunderstorms remain
likely across western and into north central Nebraska. Storms look
to start out discrete, supercellular in nature. 30 - 40 kts
bulk shear combined with ample instability will make the
environment conducive for storms having large to very large
hail. A tornado or two also remains a possibility, especially
when the low level jet strengthens during the early evening
through the overnight hours. This is all dependent of the
progression and location of the frontal boundary so this will
continue to be monitored closely for any changes.

&&

.LONG TERM /MONDAY THROUGH SATURDAY/...
Issued at 325 PM CDT Sat Jun 20 2026

Active weather continues to be the tune for much of the week with
near-daily thunderstorm chances. Numerous small shortwaves move
through Nebraska until an upper level trough moves into the early
Friday. As such, while severe weather potential remains uncertain at
this time, confidence is increasing that it could be a rainy week
regardless. Confidence is moderate to high that localized
flooding will be a growing concern for portions of central
Nebraska. With soils already being likely saturated from the
weekend rains and rain rates possibly being 0.5 to 1 inch per
hour, flooding over roadways, low lying areas, and small streams
will be a potential threat to keep an eye out to monitor for
over the next forecast packages. Other than thunderstorm and
flooding concerns, the week looks to remain mild with highs
remaining in the mid 70s until next weekend where near normal
highs return.

&&

.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 621 PM CDT Sat Jun 20 2026

KLBF- Dense low stratus will remain overhead through the night
and into tomorrow. Currently, cigs are sitting around 1500 ft.
Between 02-06z, we will see a potential line of storms move
through the area. As this moves through, cigs will drop between
500-1000 ft with vis as low as 4 SM. Some uncertainty remains
on when this will finally move out, but roughly around 06z we
should see much of the activity moving east of the area. This
will leave us with overcast skies and IFR cigs. 10z and beyond,
cigs are expected to decrease even more, becoming overcast
around 500 ft. These conditions will remain through much of the
morning.

Winds will remain gusty and out of the east-southeast until
around 06z, with gusts upwards to 25 KTs. As the line of storms
move through between 02-06z, gusty winds may result. Thus, opted
to include VRB winds with gusts upwards to 40 KTs in the PROB30
group for when this comes through. After 06z, winds will
gradually decrease and generally become light and variable by
10z.

KVTN- Dense low stratus deck will remain draped over the area
through tonight and much of Sunday. Currently, cigs have been
hovering around 1000 ft and should continue through the start
of the TAF period. Between 00-04z, we will have the chance for
isolated-scattered showers/storms, which can drop cigs to
around 800 ft and vis to 5 SM. 12z Sunday, the low stratus will
remain overhead and around 500 ft. Another round of isolated-
scattered showers/storms will move through after 15z Sunday,
which may result in even lower cigs. Confidence is lower at this
time. Thus, opted to message through a PROB30 group.

Gusty winds will remain through the start of the TAF period,
with southeasterly winds between 10-15 KTs gusting upwards to 25
KTs. Wind speeds will gradually decrease through the night,
becoming light and southeasterly after 12z Sunday.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
None.

&&

SHORT TERM...MRS
LONG TERM...MRS
AVIATION...Gunkel
Hazardous weather outlook, Jun 20, 2:06 PM MDT, 4 hours 34 minutes before
Hazardous Weather Outlook
National Weather Service North Platte NE
306 PM CDT Sat Jun 20 2026

NEZ004>010-022>029-035>038-056>059-069>071-094-212015-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-Grant-
Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-Logan-
Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
306 PM CDT Sat Jun 20 2026 /206 PM MDT Sat Jun 20 2026/

This Hazardous Weather Outlook is for portions of western and north
central Nebraska.

.DAY ONE...This afternoon and tonight.

The threat for thunderstorms will increase this afternoon into
tonight. Severe storms will be possible with very large hail,
damaging winds, and a few tornadoes being the main threats. There
will also be the potential for heavy rainfall this evening into
Sunday morning. A tornado watch has been issued for portions of
southwest Nebraska through 10 pm CDT and a flood watch has been
issued for Custer County from 7pm to 7am CDT.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Strong to severe thunderstorms are possible Sunday afternoon and
evening with hail and strong winds being the main threats.

Thunderstorms will continue to be possible through Friday. At this
time the severe threat is uncertain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 6:09 PM MDTSevere Thunderstorm WarningLBFGarden, Grant, Sheridan51 min
Jun 20, 7:33 PM MDTAreal Flood AdvisoryLBFGarfield, Loup7 hr
Jun 20, 8:40 PM MDTSevere Thunderstorm WarningLBFGarden50 min
Jun 21, 12:55 PM MDTSevere Thunderstorm WarningLBFGarden50 min
Jun 21, 1:19 PM MDTSpecial Weather StatementLBFChase, Perkins56 min
Jun 21, 1:28 PM MDTSevere Thunderstorm Warning Considerable damage threatLBFGarden41 min
Jun 21, 1:42 PM MDTSevere Thunderstorm WarningLBFChase48 min
Jun 21, 1:48 PM MDTSevere Thunderstorm WarningLBFArthur42 min
Jun 21, 1:56 PM MDTSevere Thunderstorm WarningLBFChase64 min
Jun 21, 2:22 PM MDTSevere Thunderstorm Warning Considerable damage threatLBFArthur, Keith38 min
Jun 21, 2:44 PM MDTSevere Thunderstorm Warning Considerable damage threatLBFHayes16 min
Jun 21, 3:02 PM MDTSevere Thunderstorm WarningLBFSheridan43 min
Jun 21, 3:08 PM MDTSevere Thunderstorm WarningLBFKeith, Lincoln, Perkins52 min
Jun 21, 3:21 PM MDTSpecial Weather StatementLBFGrant24 min
Jun 21, 3:40 PM MDTSevere Thunderstorm WarningLBFFrontier, Hayes, Lincoln, Perkins65 min
Jun 21, 3:48 PM MDTSpecial Weather StatementLBFGrant27 min
Jun 21, 4:10 PM MDTSpecial Weather StatementLBFSheridan35 min
Jun 21, 4:16 PM MDTSevere Thunderstorm WarningLBFCherry, Garden, Grant, Sheridan44 min
Jun 21, 4:42 PM MDTSevere Thunderstorm WarningLBFCherry, Garden, Grant, Sheridan48 min
Jun 21, 5:20 PM MDTSevere Thunderstorm WarningLBFArthur, Keith40 min
Jun 21, 5:39 PM MDTSevere Thunderstorm WarningLBFArthur, Keith40 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2026Every severe thunderstorm warning in 2026

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.