Alert archive / Nebraska / River Flood Warnings in 2018
River Flood Warning 35, NWS Omaha, NE
NWS Omaha, NE issued this river flood warning at Sep 4, 2018, 6:42 AM CDT for Cass County, Nebraska. It took effect at Sep 4, 2018, 6:55 AM CDT. It was in force for 23 hr.
The area
The counties it named.
The facts
- Issued
- Sep 4, 2018, 6:42 AM CDT (11:42 UTC)
- In effect from
- Sep 4, 2018, 6:55 AM CDT
- Expired
- Sep 5, 2018, 5:52 AM CDT
- In force
- 23 hr
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Flood severity
- Minor
County Cass County, NE
The radar
The Omaha radar (KOAX), 49 km from the middle of the area, began a volume at 11:43 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.
The river
Written for the forecast point Salt Creek near Greenwood (GRNN1). The gauge peaked at 21.44 ft at Sep 4, 2018, 7:00 PM CDT.
- Action stage
- 18 ft
- Minor stage
- 20 ft
- Moderate stage
- 24 ft
- Major stage
- 31 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 06803555, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
What forecasters said that day
The local office's own words before this river flood warning went out, 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 this river flood warning went out at Sep 4, 6:24 AM CDT, 18 minutes earlier.
Area forecast discussion, Sep 4, 6:24 AM CDT, 18 minutes before
Area Forecast Discussion
National Weather Service Omaha/Valley NE
624 AM CDT Tue Sep 4 2018
.UPDATE...
Issued at 620 AM CDT Tue Sep 4 2018
Counties added to Flash Flood Watch which is now in effect through
this evening.
&&
.SHORT TERM...(Today through Thursday)
Issued at 326 AM CDT Tue Sep 4 2018
WV/IR imagery this morning showing near meridional flow over the
central and southern Plains resulting in a northward trajectory of
precip extending southward from the CWA all the way into OK.
Meanwhile GOES imagery was revealing the continuous influx of
moisture has pushed PWAT values close to 200 percent of normal over
eastern KS and most of the CWA.
Unfortunately precip chances remain in play over the next couple
days prompting WPC to include most of eastern Nebraska and southwest
Iowa in a slight risk for excessive rainfall today through
Wednesday.
Models advertise near meridional flow with embedded impulses
remaining in place over the central and southern Plains through
today. Radar mosaic the last several hours suggest area of precip
currently lifting out of northeast KS will take a slight turn to
the west through this morning with additional accumulation focused
over areas already in a Flash Flood
Watch...Seward/Butler/Jefferson/Lancaster/Gage counties. Given
this have opted to extend the Watch up through early afternoon.
Fast westerlies with a series of embedded impulses coupled with a
very moisture rich environment will mean prolonged periods of
additional rainfall will be possible then the next couple days.
Precip activity will continue tonight via persistent moist 315k
isentropic upglide. Wednesday morning a cold front is progged push
into the northern CWA. As the boundary drift farther south models
show focus for rain accumulations shifting to areas along and
south of the I-80 corridor Wednesday evening through Thursday
night. And as of now total accumulations per WPC suggest amounts
ranging 2 to 3 inches could be realized by early Friday morning.
.LONG TERM...(Thursday night through Monday)
Issued at 326 AM CDT Tue Sep 4 2018
Medium range models in rather good agreement showing rather
progressive large scale pattern through the extended periods along
with a series of embedded shortwave trofs crossing the region. And
with ample moisture expected to be in place additional rounds of
precip activity will be possible next weekend into early next week.
Below normal highs on Saturday in the lower/mid 70s. Warming
trend beginning Sunday then bringing highs to near normal in the
mid/upper 70s.
&&
.AVIATION...(For the 12Z TAFS through 12Z Wednesday morning)
Issued at 600 AM CDT Tue Sep 4 2018
Messy aviation forecast with MVFR to IFR conditions at KOFK much
of the forecast period. Conditions are mostly VFR in the KOMA and
KLNK areas for now, but will likely see deterioration of ceilings
down to MVFR or lower. IFR ceilings possible at KOMA and KLNK
mainly after 00Z. Winds will start out mainly from the south or
southeast but shift to west and then to northwest behind a weak
cold front that will be moving through the region.
&&
.OAX WATCHES/WARNINGS/ADVISORIES...
NE...Flash Flood Watch through this evening for NEZ051-053-065>068-
078-088>090-092.
IA...None.
&&
UPDATE...DEE
SHORT TERM...DEE
LONG TERM...DEE
AVIATION...MillerHazardous weather outlook, Sep 4, 6:27 AM CDT, 15 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Omaha/Valley NE 627 AM CDT Tue Sep 4 2018 NEZ051-053-065>068-078-088>090-092-050130- Saunders-Sarpy-Seward-Lancaster-Cass-Otoe-Saline-Jefferson-Gage- Johnson-Pawnee- 627 AM CDT Tue Sep 4 2018 This Hazardous Weather Outlook is for portions of east central Nebraska and southeast Nebraska. .DAY ONE...Today and Tonight Additional rounds of thunderstorms lifting out of eastern Kansas may be accompanied by heavy rainfall into the early evening hours. Because of the increasing chance for localized flooding a Flash Flood Watch is in effect through this evening. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Thunderstorms accompanied by locally heavy rain will be possible through Wednesday night. Thunderstorm chances will continue into early next week. With potential for heavy rain the next few days, additional river flooding could develop. Minor flooding should continue along the Missouri River upstream of Lewis and Clark Lake in northwest Knox county and along the Missouri River south of Brownville. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight. However, spotters are encouraged to report rainfall amounts over two inches to the National Weather Service at Omaha. IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050-052-091-093-050130- Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont- Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison- Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler-Douglas- Nemaha-Richardson- 627 AM CDT Tue Sep 4 2018 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 Additional rounds of thunderstorms lifting out of eastern Kansas may be accompanied by heavy rainfall into the early evening hours. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Thunderstorms accompanied by locally heavy rain will be possible through Wednesday night. Thunderstorm chances will continue into early next week. With potential for heavy rain the next few days, additional river flooding could develop. Minor flooding should continue along the Missouri River upstream of Lewis and Clark Lake in northwest Knox county and along the Missouri River south of Brownville. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight. However, spotters are encouraged to report rainfall amounts over two inches to the National Weather Service at Omaha.
In the hours before
Local storm report, Sep 4, 4:03 AM CDT, 2 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
403 AM CDT TUE SEP 4 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0150 AM FLASH FLOOD LINCOLN 40.82N 96.69W
09/04/2018 LANCASTER NE LAW ENFORCEMENT
FLASH FLOODING NEAR 73RD AND O STREETS, PARTIES HAD TO BE
RESCUED FROM A FLOODED VEHICLE. TIME FROM DISPATCH. ALSO
REPORTED VIA SOCIAL MEDIA.
&&Local storm report, Sep 4, 4:45 AM CDT, 1 hour 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
445 AM CDT TUE SEP 4 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0425 AM FLASH FLOOD 6 NNE LINCOLN 40.89N 96.65W
09/04/2018 LANCASTER NE LAW ENFORCEMENT
WATER INUNDATED THIS AREA. WATER WAS 3 TO 4 FEET DEEP
COVERING 75 TO 100 FOOT SECTION OF THE ROAD. AT THE TIME
OF THE REPORT, THE WATER WAS NOT FLOWING MUCH. REPORT
FROM LINCOLN PD.
&&Local storm report, Sep 4, 4:47 AM CDT, 1 hour 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
447 AM CDT TUE SEP 4 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 AM FLOOD MURDOCK 40.93N 96.28W
09/04/2018 CASS NE LAW ENFORCEMENT
MINOR FLOODING REPORTED IN THE MURDOCK AREA, ALSO ON THE
NORTHWEST SIDE OF LOUISVILLE LAKES AREA.
&&Local storm report, Sep 4, 5:09 AM CDT, 1 hour 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
509 AM CDT TUE SEP 4 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 AM FLOOD WEEPING WATER 40.87N 96.14W
09/04/2018 CASS NE LAW ENFORCEMENT
MINOR FLOODING IN WEEPING WATER CAMPGROUND AREA, ON THE
LOWER LEVEL.
&&Local storm report, Sep 4, 6:21 AM CDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
621 AM CDT TUE SEP 4 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 AM HEAVY RAIN DOUGLAS 40.59N 96.39W
09/04/2018 M3.50 INCH OTOE NE TRAINED SPOTTER
3.5 INCHS OF RAIN SINCE 6 PM LAST EVENING. BEFORE THAT
THE RAIN AMOUNT FOR THIS EVENT WAS 3 INCHES, SO THAT PUTS
THEIR STORM TOTAL UP TO 6.5 INCHES.
0605 AM HEAVY RAIN DOUGLAS 40.59N 96.39W
09/04/2018 M3.50 INCH OTOE NE TRAINED SPOTTER
3.5 INCHES OF RAIN SINCE 6 PM LAST EVENING. BEFORE THAT
THEY HAD ABOUT 3 INCHES. THIS PUTS STORM TOTAL FOR THE
PAST SEVERAL DAYS TO 6.5 INCHES.
&&The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 10:28 PM CDT | Areal Flood Advisory | OAX | Gage, Jefferson | 6 hr |
| Sep 4, 1:55 AM CDT | Areal Flood Advisory | OAX | Cass, Gage, Jefferson, Johnson, Lancaster, Otoe and 1 more | 7 hr |
| Sep 4, 2:21 AM CDT | Flash Flood Warning | OAX | Cass, Gage, Lancaster, Otoe | 3 hr |
| Sep 4, 2:57 AM CDT | Areal Flood Advisory | OAX | Douglas, Sarpy, Saunders | 6 hr |
| Sep 4, 3:38 AM CDT | Flash Flood Warning | OAX | Cass, Otoe, Sarpy | 2 hr |
| Sep 4, 6:22 AM CDT | Flash Flood Watch | OAX | Johnson, Pawnee | 28 hr |
| Sep 4, 6:42 AM CDT | River Flood Warning | OAX | Saunders | 25 hr |
| Sep 4, 7:36 AM CDT | Areal Flood Warning | OAX | Cass, Lancaster, Otoe, Saunders | 6 hr |
| Sep 4, 8:02 AM CDT | River Flood Warning | OAX | Gage | 36 hr |
| Sep 4, 9:45 AM CDT | River Flood Warning | OAX | Gage | 45 hr |
| Sep 4, 10:02 AM CDT | River Flood Warning | OAX | Otoe | 7 days |
| Sep 4, 12:28 PM CDT | Areal Flood Advisory | OAX | Gage, Jefferson, Lancaster, Saline, Saunders, Seward | 4 hr |
| Sep 4, 1:47 PM CDT | River Flood Warning | OAX | Cass | 4 days |
| Sep 4, 2:46 PM CDT | River Flood Warning | OAX | Saline | 54 hr |
| Sep 4, 3:39 PM CDT | River Flood Warning | OAX | Saunders | 24 hr |
| Sep 4, 3:39 PM CDT | River Flood Warning | OAX | Saunders | 22 hr |
Nearby
River Flood Warnings in Nebraska, 2018Every river flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.