Scattered thunderstorms moved through southwest Nebraska the afternoon of July 6 and produced damaging winds in Lincoln County and flooding in Custer County.
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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.
Scattered thunderstorms moved through southwest Nebraska the afternoon of July 6 and produced damaging winds in Lincoln County and flooding in Custer County.
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 Jul 6, 5:26 AM CST, 5 hours 23 minutes earlier.
Area Forecast Discussion National Weather Service North Platte NE 626 AM CDT Tue Jul 6 2021 .SHORT TERM...(Today through Wednesday) Issued at 357 AM CDT Tue Jul 6 2021 The main concern in the short term was with high temperatures today as that front passes across the forecast area and precipitation chances. Kept temperatures cooler across the northern Sandhills as the front will pass through that area this morning bringing a little bit of a cooler air mass with 850 temps in the lower to mid 20s. Did keep the eastern portion of the CWA in the mid to upper 80s as the front is not expected to pass through that area until later in the afternoon, allowing temperatures to rise during peak heating, temperatures aloft at 850 will be in the mid 20s. As the front passes through there will be a wind shift from the northwest to the northeast, however winds are not expected to increase drastically with the frontal passage, an increase of less than 5 mph is expected with strongest wind gust around 20 to 25 mph. Winds aloft are not really strong themselves only around 20 to 30 mph through the mid levels. As far as precipitation chances go, showers and thunderstorms are expected to develop as the front moves through the forecast area. For severe weather potential, the pre-frontal environment is marginally favorable for a little more robust thunderstorm development. Ahead of the front dewpoints will be in the upper 60s and CAPE values will range from 2000 to near 2500 J/kg extending from north central Nebraska back towards southwest Nebraska, while areas of western Nebraska into the western/northern Sandhills will only see CAPE around 1500 J/kg. If a strong to severe storm were to develop the mostly likely location would generally be along and east of a line from Naper to Tryon to Imperial. If storms reach severe potential the mostly likely impact would be large hail, however a strong wind gust can't be ruled out, along with the heavy rain potential, please see hydrology section for more info. .LONG TERM...(Wednesday night through Monday) Issued at 357 AM CDT Tue Jul 6 2021 Upper level high pressure develops across the southwest CONUS Wednesday moving eastward Thursday into portions of the western High Plains. Temperatures warm into the mid to upper 90s across western Nebraska on Thursday, a few locations could hit the century mark. Another front moves through Friday bringing the next chance for widespread thunderstorms to the area. Temperatures will also cool considerable across northern Nebraska with highs only in the low to mid 70s for Saturday. A ridge develops back into the area early next week with highs bouncing back into the mid to upper 80s on Monday. && .AVIATION...(For the 12Z TAFS through 12Z Wednesday morning) Issued at 614 AM CDT Tue Jul 6 2021 Cold front is working its way across the region this morning. Expect frontal passage at KVTN around 14Z and KLBF around 16Z. Expect winds to shift to the NW and become gusty behind the front. However, the front will have waves of low pressure rippling along the boundary that will slow the progression of the front and keep showers/thunder around through the afternoon. Due to uncertainty with timing/location of convective elements will use VCTS and amend when storms declare their intentions. Outside of storms, expect mainly VFR conditions until lower clouds can push down from the northeast later in the valid period. && .HYDROLOGY... Issued at 357 AM CDT Tue Jul 6 2021 Some models are hinting at the frontal boundary stalling across the eastern portion of the forecast area, or around north central Nebraska into central Nebraska. Leaning towards the front stalling and am expecting the movement of thunderstorms to be slower and more organized cluster of storms once it reaches north central/central Nebraska. Have placed higher qpfs across this location as the environment is favorable for high precipitation thunderstorms, pwats across this corridor are greater than 1.5 inches with a narrow corridor of 2 inches, across far north central Nebraska. This has been consistent with previous model runs. At this time widespread flooding issues are not expected, however there is the potential of localized flooding occurring as storm motion is expected to be relatively slow. A marginal risk for excessive rainfall is possible for the far eastern portions of the forecast area. Generally along and east of a line from Gross to Broken Bow to Wallace would be the heaviest rainfall. && .LBF WATCHES/WARNINGS/ADVISORIES... None. && SHORT TERM...Gomez LONG TERM...Gomez AVIATION...MBS HYDROLOGY...Gomez
Hazardous Weather Outlook...UPDATED National Weather Service North Platte NE 1106 AM CDT Tue Jul 6 2021 NEZ004>010-022>029-035>038-056>059-069>071-094-071615- 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- 1106 AM CDT Tue Jul 6 2021 /1006 AM MDT Tue Jul 6 2021/ This Hazardous Weather Outlook is for portions of western and north central Nebraska. .DAY ONE...THIS AFTERNOON AND TONIGHT. Scattered thunderstorms are possible into this evening mainly east of a line from Hayes Center through North Platte and Bassett. A few storms may become severe with large hail, damaging wind, and locally heavy rainfall the main threats. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. Additional thunderstorms will be possible Thursday through Saturday, with the strongest storms Friday into Friday night. At this time, the threat for widespread severe weather is low during this period. .SPOTTER INFORMATION STATEMENT... Please relay any information about observed severe weather to the NWS. && More information at www.weather.gov/northplatte
Special Weather Statement National Weather Service North Platte NE 1142 AM CDT Tue Jul 6 2021 NEZ059-061715- Lincoln NE- 1142 AM CDT Tue Jul 6 2021 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LINCOLN COUNTY UNTIL 1215 PM CDT... At 1142 AM CDT, Doppler radar was tracking a strong thunderstorm near Brady, or 21 miles north of Curtis, moving east at 30 mph. Nickel size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Vroman and Jeffrey Canyon State Wildlife Management Area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4088 10052 4098 10057 4103 10023 4082 10022 TIME...MOT...LOC 1642Z 262DEG 28KT 4093 10039 Roberg
The North Platte radar (KLNX), 106 km away, was scanning. The volume nearest the first event began at 16:49 UTC.
1 thunderstorm wind, 1 flood. Local standard time, as filed.
A trained weather spotter reported large tree limbs downed in Brady.
Emergency management reported most roads were covered with water in Sargent.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2021Every state in 2021This day in weather historyWarnings in Nebraska, July 2021
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: 967236, 967237.