A flash flood happened in Cedar County.
Every event with a place to put it. Tap one for its entry below.
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.
A flash flood happened in Cedar 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 Omaha, NE wrote its last area forecast discussion before the first event at Jul 18, 6:15 PM CST, 1 hour 35 minutes earlier.
Area Forecast Discussion National Weather Service Omaha/Valley NE 715 PM CDT Wed Jul 18 2018 .SHORT TERM...(Tonight through Saturday) Issued at 403 PM CDT Wed Jul 18 2018 Main forecast problem is severe weather overnight. Closed upper low is forecast to move southeast into the Mid Mississippi Valley tonight. Airmass is unstable south of a northwest-southeast warm front. Latest ML CAPE values were between 1000 to 1500 J/Kg. A north-south oriented surface trough over north central Nebraska is forecast to move slowly eastward during the evening. 0-6 Km bulk shear at 20Z is 35 to 50 knots over eastern Nebraska. Believe the scenario will be isolated storms, most likely Supercells, to occur in northeast Nebraska during the early evening. Damaging winds and an isolated tornado is possible. Then later on this evening, a complex of severe thunderstorms with damaging wind threat is expected to develop over northeast Nebraska after 03Z and move southeast across eastern Nebraska and southwest Iowa. HRRR model forecasts that the complex will be through eastern Nebraska and southwest Iowa by 11 to 12Z. After this complex moves through, dry weather is forecast through Saturday as high pressure moves in. .LONG TERM...(Saturday night through Wednesday) Issued at 403 PM CDT Wed Jul 18 2018 Below normal temperatures, with highs in the lower 80s is forecast. Another chance of thunderstorms is on Sunday night into Monday morning as a weak cold front moves southeast. This may only affect western portions of our CWA. The next system with more widespread thunderstorm activity will be next Wednesday as another cold front moves southeast in northwest upper flow. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 715 PM CDT Wed Jul 18 2018 Main aviation concern during the TAF period is the coverage and evolution of strong to severe thunderstorms that currently are ongoing northwest of KOFK. Isolated convection is expected to congeal into linear cluster of severe storms and then spread southeast across eastern Nebraska late evening and overnight. Timing into KOFK around 03z, with potential impact through 07z. Right now, looks like storms will not arrive in vicinity of KOMA until 07-08z, and will persist through 10-11 UTC. Timing into Lincoln 08-09z, with impact through 12z. Ceilings with storms will drop to low VFR or high end MVFR. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None. && SHORT TERM...Smith LONG TERM...Smith AVIATION...Fortin
Hazardous Weather Outlook National Weather Service Omaha/Valley NE 655 PM CDT Wed Jul 18 2018 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-191400- 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- 655 PM CDT Wed Jul 18 2018 This Hazardous Weather Outlook is for portions of southwest Iowa...west central Iowa...east central Nebraska...northeast Nebraska and southeast Nebraska. .DAY ONE...Tonight and Thursday Severe thunderstorms will continue moving southeast across northeast Nebraska this evening. Isolated tornadoes, large hail and damaging thunderstorms are possible. This activity is expected to continue moving southeast into east central Nebraska later tonightwhere damaging thunderstorm winds and large hail will be the primary hazards. Locally heavy rainfall may also accompany the severe storms. Minor flooding will continue on the Missouri River from Nebraska City downstream to Rulo. .DAYS TWO THROUGH SEVEN...Thursday night through Wednesday Isolated thunderstorms may linger into Thursday morning in eastern parts of the area, then on and off again chances remain for Sunday through Tuesday. Minor flooding will continue along the Missouri River from Nebraska City downstream to Rulo. .SPOTTER INFORMATION STATEMENT... Spotter activation will be needed across portions of northeast Nebraska this evening.
Special Weather Statement
National Weather Service Omaha/Valley Nebraska
626 PM CDT WED JUL 18 2018
NEZ011-012-190000-
Cedar NE-Knox NE-
626 PM CDT WED JUL 18 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KNOX AND WEST
CENTRAL CEDAR COUNTIES UNTIL 700 PM CDT...
At 626 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles northeast of Bloomfield, or 11 miles south of Lewis And Clark
State Recreation Area, moving southeast at 15 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Bloomfield, Wausa, Crofton and Pleasant Valley.
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.
&&
A Tornado Watch remains in effect until 1100 PM CDT for northeastern
Nebraska.
LAT...LON 4281 9755 4258 9725 4244 9752 4244 9754
4268 9772
TIME...MOT...LOC 2326Z 313DEG 13KT 4270 9757
KERNPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
719 PM CDT WED JUL 18 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0711 PM HAIL 7 SSW FORDYCE 42.61N 97.43W
07/18/2018 E0.25 INCH CEDAR NE EMERGENCY MNGR
&&
DEWALDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
724 PM CDT WED JUL 18 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0711 PM HAIL 7 SSW FORDYCE 42.61N 97.43W
07/18/2018 E1.00 INCH CEDAR NE EMERGENCY MNGR
CORRECTS PREVIOUS HAIL REPORT FROM 7 SSW
FORDYCE.
&&
DEWALDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
751 PM CDT WED JUL 18 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0740 PM HAIL 7 WSW HARTINGTON 42.57N 97.39W
07/18/2018 E1.00 INCH CEDAR NE PUBLIC
SHREDDED CROPS AND TREES.
&&
DEWALDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
831 PM CDT WED JUL 18 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0825 PM FUNNEL CLOUD 2 S COLERIDGE 42.48N 97.21W
07/18/2018 CEDAR NE TRAINED SPOTTER
&&
DEWALDSpecial Weather Statement
National Weather Service Omaha/Valley Nebraska
835 PM CDT WED JUL 18 2018
NEZ011-016-190215-
Knox NE-Antelope NE-
835 PM CDT WED JUL 18 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ANTELOPE AND
SOUTHWESTERN KNOX COUNTIES UNTIL 915 PM CDT...
At 835 PM CDT, Doppler radar was tracking a strong thunderstorm 13
miles south of Lynch, or 13 miles northeast of O'Neill, moving
southeast at 20 mph.
Nickel size hail will be possible with this storm.
Locations impacted include...
Verdigre, Orchard, The Highway 14 And 59 Junction and Ashfall Fossil
Beds State Historical Park.
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.
&&
A Tornado Watch remains in effect until 1100 PM CDT for northeastern
Nebraska.
LAT...LON 4268 9830 4257 9793 4229 9819 4236 9830
4264 9831
TIME...MOT...LOC 0135Z 297DEG 19KT 4264 9853
KERNThe Sioux Falls radar (KFSD), 126 km away, was scanning. The volume nearest the first event began at 01:48 UTC.
1 flash flood. Local standard time, as filed.
Up to three inches of rain caused water to go over Cedar County Roads 561 and 876.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2018Every state in 2018This day in weather historyWarnings in Nebraska, July 2018
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: 769665.