An unorganized group of storms merged and surged across far eastern Nebraska and into western Iowa and produced widespread wind damage.
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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 OAX wrote it up.
An unorganized group of storms merged and surged across far eastern Nebraska and into western Iowa and produced widespread wind damage.
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 Omaha, NE wrote its last area forecast discussion before the first event at Jun 29, 5:24 AM CST, 1 hour 11 minutes earlier.
Area Forecast Discussion National Weather Service Omaha/Valley NE 624 AM CDT Thu Jun 29 2023 ...Updated Aviation Forecast Discussion... .DISCUSSION... Issued at 141 AM CDT Thu Jun 29 2023 Key Messages: - Potential MCS to roll through the southern portion of the forecast area this morning bringing possible damaging winds and localized heavy rainfall to the area. - Periodic showers and thunderstorms Friday with more widespread chances Saturday. - Mostly dry and warm Sunday through Independence Day. Focus this morning is on the convection rolling across southern Nebraska. This complex is forecast to become more of an MCS and is forecast to push into our southeastern Nebraska counties over the next few hours per latest CAMs. Damaging wind and localized heavy rainfall will be the primary hazards as it quickly moves east through the forecast area. Storms will be moving into a favorable environment with plenty of deep layer shear as well as an axis of high 0-3km shear along the Kansas/Nebraska border. The storms will also be moving into a very unstable airmass where MUCAPE values are on the order of 3000-4000 J/kg to sustain updrafts. This complex will likely continue to roll through southern Iowa through the morning. An active weather pattern will continue through the holiday weekend as a mid-level trough over the western U.S. advances eastward and eventually into the central Plains on Saturday. Ahead of this, a series of shortwaves will move east in a belt of enhanced mid- level flow across Nebraska and Iowa. A surface boundary is forecast to remain draped across Kansas and Missouri and finally pushed out of the area as the mid- level trough moves across eastern Nebraska/western Iowa on Saturday. Periodic chances for showers and thunderstorms will be on the high side as plenty of moisture resides overhead with PWATs near 100-150% of normal through this time. The best chance for heaviest and more widespread rainfall looks to be Friday night through Saturday in advance of the approaching mid-level trough. Periodic strong to severe storms will also be possible through this time with large hail and locally heavy rainfall as the primary hazards. Friday highs are forecast in the upper 80s to low 90s with cooler highs on Saturday in the upper 70s to low 80s with the passage of the upper trough on Saturday. Heights will build over the region with the passage of the above mentioned upper trough by Sunday which should push temperatures back into the upper 80s after a bit of a reprieve with the trough passage on Saturday. By Monday, highs return to the 90s for most areas with slightly warmer readings and continued dry conditions for Independence Day. && .AVIATION...(For the 12Z TAFS through 12Z Friday morning) Issued at 613 AM CDT Thu Jun 29 2023 VFR conditions are expected at the TAF sites today with the exception of early morning showers and thunderstorms passing over KLNK and KOMA in the first few hours of the TAF which could drop conditions down to MVFR. Think KOFK should mainly stay dry. Another round of showers and thunderstorms are possible overnight, generally after 09z. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None. && DISCUSSION...Kern AVIATION...Kern
Hazardous Weather Outlook National Weather Service Omaha/Valley NE 337 AM CDT Thu Jun 29 2023 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-292245- Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont- Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison- Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler- Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline- Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson- 337 AM CDT Thu Jun 29 2023 This Hazardous Weather Outlook is for portions of southwest Iowa...west central Iowa...east central Nebraska...northeast Nebraska and southeast Nebraska. .DAY ONE...Today and Tonight Severe storms are possible early this morning, mainly along and south of a line from Seward to Lincoln to Plattsmouth. Damaging wind gusts are the main hazards with this activity. Strong to severe storms developing over western and central parts of Nebraska this afternoon and evening could move into the area late tonight into Friday morning. Large hail, damaging winds, and localized flooding are all possible. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Another round of potentially strong storms appears possible late Friday night. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected today or tonight.
Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
456 AM CDT Thu Jun 29 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0455 AM Hail 1 NNW Fairbury 40.15N 97.18W
06/29/2023 E2.00 inch Jefferson NE Emergency Mngr
&&Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
500 AM CDT Thu Jun 29 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0457 AM Hail 1 NW Fairbury 40.15N 97.19W
06/29/2023 M1.00 inch Jefferson NE Public
&&Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
503 AM CDT Thu Jun 29 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0458 AM Hail 1 WNW Fairbury 40.15N 97.20W
06/29/2023 E2.50 inch Jefferson NE Emergency Mngr
&&Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
616 AM CDT Thu Jun 29 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0525 AM Hail Virginia 40.25N 96.50W
06/29/2023 E1.00 inch Gage NE Trained Spotter
Large tree uprooted.
&&Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
644 AM CDT Thu Jun 29 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0632 AM Tstm Wnd Gst 3 WSW Nemaha 40.32N 95.73W
06/29/2023 M59 MPH Nemaha NE Public
A personal weather station measured a peak
wind gust of 59 mph.
&&
PFPreliminary Local Storm Report
National Weather Service Omaha/Valley NE
708 AM CDT Thu Jun 29 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0658 AM Tstm Wnd Dmg 3 SE Sterling 40.43N 96.35W
06/29/2023 Johnson NE Public
Report from mPING: 1-inch tree limbs broken;
Shingles blown off.
&&
PFThe Omaha radar (KOAX), 76 km away, was scanning. The volume nearest the first event began at 12:33 UTC.
2 thunderstorm wind. Local standard time, as filed.
Emergency management relayed photos of numerous downed trees and branches in Thurman.
A personal weather station measured a peak wind gust of 62 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2023Every state in 2023This day in weather historyWarnings in Iowa, June 2023
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: 1107740, 1107741.