A line of thunderstorms developed during the late morning hours of May 17th across northwestern Nebraska. As this activity tracked east into north central Nebraska, it became severe as it approached Brown and Keya Paha Counties during the early afternoon hours.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LBF wrote it up.
A line of thunderstorms developed during the late morning hours of May 17th across northwestern Nebraska. As this activity tracked east into north central Nebraska, it became severe as it approached Brown and Keya Paha Counties during the early afternoon hours. This line of strong to severe thunderstorms tracked further east, impacting Rock, Boyd and Holt Counties before exiting the area. Thunderstorm wind gusts to 77 MPH and wind damage to a convenience store were reported with the strongest storms.
The local office's own words before the first event, 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 the first event at May 17, 11:36 AM CST, 24 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service North Platte NE 1236 PM CDT Sun May 17 2026 .KEY MESSAGES... - Severe weather appears likely again Sunday with an Enhanced Risk (level 3 of 5) in place for much of north central Nebraska. - Precipitation will continue into Monday, including some thunderstorm threat in the east and cooling temperatures in the west potentially leading to a brief rain/snow mix. - Much of next week will be on the cooler side with highs in the 60s before warming up for late week into the following weekend. && .SHORT TERM /THROUGH TONIGHT/... Issued at 308 AM CDT Sun May 17 2026 The main concern in the short term will be the convection overnight and again Sunday afternoon/evening. The strengthening LLJ tonight will become the focus for additional development overnight into early Sunday morning. Storms that develop will generally be elevated in nature overnight, and although most storms should remain below severe criteria, an isolated strong to severe thunderstorm can't be ruled out with strong winds and hail being the main concern. A few of the CAMs do suggest the potential for thunderstorms lingering into the mid-morning across the northern Sandhills, however confidence is low at this time in thunderstorms continuing in the morning after sunrise. Attention turns to Sunday afternoon and early evening. There is some uncertainty on thunderstorm coverage and severity for Sunday, as it is dependent on where the front sets up tomorrow. Current thinking is the front will be situated on the eastern portion of the forecast warning area by afternoon, generally east of HWY 83. However exactly how far east will determine how much of the area will see the potential for sfc based thunderstorm development ahead of the front, however elevated convection will be possible behind the front. The latest CAMs have trended with a quicker eastern progression of the front with the greatest threat for sfc based storm development across far north central Nebraska, generally from a line from Butte to Dunning and eastward, where the main hazards will be strong damaging winds, large hail and even an isolated tornado can't be ruled out. Although there will still be the potential to see some elevated thunderstorms west of the line, where hail will be the main concern. Will need to continue to monitor as thunderstorm development is conditional upon the frontal setup, the environment will be favorable for supercell development as MU CAPE values will range from around 1500 to 2000 J/kg across western and north central Nebraska, with greater than 2000 J/kg generally east of HWY 83 in the afternoon. 0 to 6 km shear increases in the afternoon to around 50 kts or greater. Mid level lapse rates will remain steep through the afternoon into early evening. The greatest timeframe for strong to severe thunderstorms at this time would be early afternoon progressing eastward, with most of the severe threat for convection out of the forecast area by early evening. && .LONG TERM /MONDAY THROUGH SATURDAY/... Issued at 308 AM CDT Sun May 17 2026 Monday...parent upper-trough will begin to depart the Great Basin and cross the Central Rockies early in the day. Strong synoptic lift will promote lee cyclogenesis over southeast Colorado. This will draw a strong cold front south into western Kansas and promote cold air advection across much of western Nebraska. Daytime temperatures continue to fall with consecutive forecasts with highs only reaching the lower 40s to middle 50s now. Though squarely on the cooler side of the advancing cold front, steep lapse rates remain in place across portions of central Nebraska and this will promote elevated instability within a strongly sheared environment. This fails to close the door on any threat for a strong/severe thunderstorm in our eastern zones but does limit the threat considerably. The latest SPC Outlook keeps only general thunder in the area with a sharp gradient of Marginal to Slight to Enhanced Risk levels not far to the east. The NAM12 solution depicts rapid thunderstorm development within northerly flow of northeast Nebraska, not far from Garfield/Wheeler/Holt Counties. Folks should continue to monitor the forecast for the latest details regarding any thunderstorm threat late in the day. Further west across the Sandhills into the Panhandle, more persistent precipitation is likely to occur due to strong synoptics in the area, notable the previously mentioned height falls, increasing divergence aloft, and DCVA will lead to a broad shield of light to moderate precipitation. Temperatures at h85 will fall to around 0C with lows falling into the upper 20s to lower 30s. This will support some potential for a brief transition to snow. The duration of this should remain short enough to preclude greater impacts though. This is supported by < 10% potential for seeing measureable snow in the local area. Even so, late May snow is fairly uncommon and folks should continue to monitor the forecast, should this outlook remain consistent, for potential minor impacts. Tuesday and beyond...trough axis will clear the region by late Monday with mid-level heights expected to build in fairly quick. Relative zonal flow will become established by midweek with low amplitude ridging upstream eventually supporting quasi-northwest flow. High pressure will work in towards Wednesday and will maintain cooler temperatures. Southerly flow on the backside of this feature will draw in some moisture and set the stage for some light precipitation potential. The late week setup will be fairly active with recurring Chance PoPs (up to 35%) for Thursday through the weekend. While PoPs suggest reasonable rain potential, moisture will likely be stymied by a surface front impeding some northerly moisture advection. This suggests light rain events, not any particularly wetting event, with lack of any real moisture source. Temperatures will moderate some, with a return to seasonable levels by Friday and slightly above normal temperatures by the following weekend. && .AVIATION /18Z TAFS THROUGH 18Z MONDAY/... Issued at 1236 PM CDT Sun May 17 2026 Degraded aviation conditions are likely over the next 24 hours due to widespread low stratus and periods of rain and thunderstorms. Currently, thunderstorms are impacting the KVTN terminal with heavy rainfall, gusty winds, and frequent lightning. This activity will move east of the terminal over the next couple of hours, though another round of thunderstorms may develop later this afternoon. Near the KLBF terminal, IFR to LIFR conditions should gradually improve over the next few hours, though isolated showers remain possible. Later tonight, another area of thunderstorms may approach from the southwest, though most guidance weakens this activity before it reaches the terminal. Toward the end of the TAF period, drier conditions are expected to return across much of the area. && .LBF WATCHES/WARNINGS/ADVISORIES... None. && SHORT TERM...Gomez LONG TERM...NMJ AVIATION...Labenz
Hazardous Weather Outlook National Weather Service North Platte NE 515 AM CDT Sun May 17 2026 NEZ004>010-022>029-035>038-056>059-069>071-094-181015- 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- 515 AM CDT Sun May 17 2026 /415 AM MDT Sun May 17 2026/ This Hazardous Weather Outlook is for portions of western and north central Nebraska. .DAY ONE...Today and tonight. Severe thunderstorms are likely across portions of western and central Nebraska. This will likely occur in two regimes: one with storms moving into southwest Nebraska from Colorado and two, along a frontal boundary around central and eastern Nebraska. The overall environment will be supportive of very large hail (2"+), damaging wind gusts (75+ mph), and a tornado or two. Timing will favor the late afternoon into the evening. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Isolated showers and a few thunderstorms are possible on Monday across central Nebraska. The threat for severe weather appears low. Falling temperatures Monday night may lead to a brief transition from rain to a rain/snow mix. At this time, any impacts are expected to remain minor. Beyond Monday, the potential for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed.
Special Weather Statement
National Weather Service North Platte NE
1137 AM CDT Sun May 17 2026
NEZ005-094-171700-
Eastern Cherry NE-Western Cherry NE-
1137 AM CDT Sun May 17 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN CHERRY COUNTY
THROUGH NOON CDT...
At 1136 AM CDT, Doppler radar was tracking a strong thunderstorm 19
miles west of Brownlee, or 22 miles north of Mullen, moving northeast
at 40 mph.
HAZARD...Wind gusts up to 40 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Highway 97 crossing the North Loup River, Marsh Flat, and Highway 97
crossing Big Creek.
This includes Highway 97 between mile markers 82 and 109.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4224 10103 4244 10116 4262 10076 4235 10055
TIME...MOT...LOC 1636Z 243DEG 33KT 4237 10099
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH
TaylorSpecial Weather Statement
National Weather Service North Platte NE
1230 PM CDT Sun May 17 2026
NEZ005-006-008-171815-
Brown NE-Eastern Cherry NE-Keya Paha NE-
1230 PM CDT Sun May 17 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN CHERRY...
NORTHWESTERN BROWN AND WESTERN KEYA PAHA COUNTIES THROUGH 115 PM
CDT...
At 1230 PM CDT, Doppler radar was tracking a strong thunderstorm 12
miles northwest of Johnstown, or 20 miles southeast of Valentine,
moving northeast at 50 mph.
HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Springview, Norden, Wood Lake, Burton, Nets Peak, Smith Falls State
Park, Meadville, North River Trail, and Sparks.
This includes the following highways...
Highway 183 between mile markers 213 and 225.
Highway 20 between mile markers 210 and 213, and between mile
markers 219 and 228.
Highway 12 between mile markers 17 and 64.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4256 10015 4276 10042 4300 10024 4299 9946
TIME...MOT...LOC 1730Z 219DEG 45KT 4270 10021
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH
TaylorThe North Platte radar (KLNX), 133 km away, was scanning. The volume nearest the first event began at 17:58 UTC.
7 thunderstorm wind. Local standard time, as filed.
A thunderstorm wind gust of 60 MPH was reported at this location.
A trained spotter reported a thunderstorm wind gust of 60 MPH at this location.
Thunderstorm wind gusts up to 60 MPH combined with nickel sized hail, led to shredded tree leaves and damage to the siding of a residence at this location.
Trained spotter estimates 60 MPH thunderstorm wind gusts at this location.
Measured by a personal weather station.
Measured wind gust of 77 MPH reported at this location.
Wind gust measured at 67 MPH, partially blew off the roof of a convenience store. Several large tree branches down in Spencer.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2026Every state in 2026This day in weather historyWarnings in Nebraska, May 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1332773, 1332774, 1332775, 1332776, 1332777, 1332778, 1332779.