Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 265, NWS Omaha, NE

September 1, 20184 counties in Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Sep 1, 2018, 9:19 PM CDT for 4 counties in Nebraska. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 1, 2018, 9:19 PM CDT (02:19 UTC)
Expired
Sep 1, 2018, 9:45 PM CDT
In force
26 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
0.75 in
Wind
80.0 mph

Counties Cass County, NE, Lancaster County, NE, Otoe County, NE, Saunders County, NE

The radar

The Omaha radar (KOAX), 48 km from the middle of the area, began a volume at 02:17 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 1, 4:47 PM CDTSevere Thunderstorm WatchSPC6 hr
Sep 1, 8:20 PM CDTSevere Thunderstorm WatchSPC5 hr

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Sep 1, 6:08 PM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, Sep 1, 6:08 PM CDT, 3 hours 11 minutes before
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Hazardous weather outlook, Sep 1, 4:58 PM CDT, 4 hours 21 minutes before
Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
458 PM CDT Sat Sep 1 2018

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-021200-
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-
458 PM CDT Sat Sep 1 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 Sunday

Severe thunderstorms are expected through much of the evening,
especially along and south of Interstate 80. The best timing for
severe weather will from around 6 to 7 pm, through about 3 to 5
am. A few storms could approach severe limits with winds 60 mph
or higher, hail of 1 to 2 inches in diameter, and 1 to 2 inches
of rain. Those with outdoor plans this evening should remain
weather aware and be ready to implement a severe weather plan at a
moments notice.

There could be flash flooding tonight, especially if several
rounds of storms move over the same locations.

Minor flooding will continue along the Missouri River upstream of
Lewis and Clark Lake in northwest Knox county.

.DAYS TWO THROUGH SEVEN...Sunday night through Saturday

Scattered thunderstorms remain in the forecast for Sunday through
Monday. Some strong storms and areas of locally heavy rain will be
possible, especially from late Sunday afternoon into Monday
morning. Some flash flooding could develop. Total rainfall
through Monday could reach 3 to 5 inches in some spots across east
central Nebraska and western Iowa.

The weather pattern should remain active through at least mid
week, with a continued chance for thunderstorms just about every
day.

Minor flooding will continue along the Missouri River upstream of
Lewis and Clark Lake in northwest Knox county. With the expected
heavy rains through the remainder of the Labor Day weekend,
additional river flooding could develop.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed in some areas tonight, primarily
across southeast Nebraska and southwest Iowa.

Pearson

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 1, 7:15 PM CDTSevere Thunderstorm WarningOAXCass, Lancaster, Otoe45 min
Sep 1, 7:49 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Saline41 min
Sep 1, 7:55 PM CDTSevere Thunderstorm WarningOAXCass, Otoe50 min
Sep 1, 8:07 PM CDTAreal Flood AdvisoryOAXCass, Lancaster, Otoe5 hr
Sep 1, 8:29 PM CDTSevere Thunderstorm WarningOAXCass, Otoe46 min
Sep 1, 8:33 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Saline42 min
Sep 1, 8:38 PM CDTSpecial Weather StatementOAXLancaster22 min
Sep 1, 8:59 PM CDTSevere Thunderstorm WarningOAXGage, Lancaster, Saline, Seward46 min
Sep 1, 9:23 PM CDTAreal Flood AdvisoryOAXCass, Otoe5 hr
Sep 1, 9:23 PM CDTSevere Thunderstorm WarningOAXCass, Lancaster, Otoe37 min
Sep 1, 9:26 PM CDTAreal Flood AdvisoryOAXLancaster5 hr
Sep 1, 9:44 PM CDTSevere Thunderstorm WarningOAXCass, Douglas, Sarpy, Saunders31 min
Sep 1, 9:56 PM CDTSevere Thunderstorm WarningOAXCass, Nemaha, Otoe34 min
Sep 2, 2:39 AM CDTSpecial Weather StatementOAXSarpy36 min
Sep 2, 3:45 AM CDTAreal Flood WarningOAXCass, Lancaster, Otoe6 hr
Sep 2, 4:13 AM CDTAreal Flood WarningOAXGage, Lancaster, Saline6 hr
Sep 2, 4:21 AM CDTAreal Flood WarningOAXCass, Otoe6 hr
Sep 2, 9:42 AM CDTRiver Flood WarningOAXNemaha74 days
Sep 2, 9:42 AM CDTRiver Flood WarningOAXRichardson12 days
Sep 1, 9:08 PM CDTSevere Thunderstorm WarningOAXFremont, Mills, Montgomery, Page, Pottawattamie52 min
Sep 1, 10:26 PM CDTSevere Thunderstorm WarningOAXFremont, Montgomery, Page34 min
Sep 1, 10:35 PM CDTSpecial Weather StatementOAXShelby25 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2018Every severe thunderstorm 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.