Flash Flood Warning 5, NWS Omaha, NE

262 
WGUS73 KOAX 190207
FFSOAX

Flash Flood Statement
National Weather Service Omaha/Valley Nebraska
907 PM CDT Thu Jun 18 2020

NEC067-097-109-131-190215-
/O.EXP.KOAX.FF.W.0005.000000T0000Z-200619T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lancaster NE-Johnson NE-Otoe NE-Gage NE-
907 PM CDT Thu Jun 18 2020

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN LANCASTER...WESTERN
JOHNSON...SOUTHWESTERN OTOE AND NORTHEASTERN GAGE COUNTIES WILL
EXPIRE AT 915 PM CDT...

The heavy rain has ended and any flood waters were likely receding. 
Flash flooding is no longer expected to pose a threat at this time. 
Additional thunderstorms will be possible overnight. Please continue 
to heed any remaining road closures.

LAT...LON 4064 9629 4032 9631 4027 9680 4053 9657

$$

DEWALD

Area Forecast Discussion
National Weather Service Omaha/Valley NE
638 PM CDT Thu Jun 18 2020

...Updated Aviation Forecast Discussion...

.DISCUSSION...
Issued at 209 PM CDT Thu Jun 18 2020

Thursday - Thursday night:

Surface observations currently show an approaching cold front
draped from northeast Nebraska to the southwest through Columbus
Nebraska. This front will be the focus of developing thunderstorms
this afternoon. A few of these storms could be strong to severe.
Ample CAPE values of 2000+ j/Kg is currently situated across
eastern Nebraska and western Iowa. Shear, however will be a
limiting factor this afternoon. 0-6 km bulk shear values will only
be around 20 knots ahead of this front. This should limit much
potential of any longer duration sustainable storm. Expect storms
this afternoon to pulse up quickly, then quickly pulse down
leading to a brief damaging wind threat. Hail potential will be
quite limited today with very high freezing levels ~14,000 AGL.
Heavy rain will be another hazard with storms this afternoon. This
mornings sounding showed precipitable water values of 1.30".
Model soundings show this increasing through the afternoon as
moistures advects into the advects into the area. 1-2" will be
possible by the time storms come to an end Thursday night.

Friday - Friday night:

Most storms are expected to come to an end
by Friday morning, however, showers and thunderstorms may linger
near the Kansas and Missouri borders. This will be enhanced by an
approaching shortwave moving through Friday evening. Severe
weather is not expected, however, heavy rain may be possible again
across southeast Nebraska with 0.5-1.00" possible. As far as
temperatures go, expect much cooler conditions with most places
remaining around 80 or below.

Saturday and beyond:

The pattern will remain wet through Monday with
on and off chances of showers and thunderstorms as a series of
waves slide through the area. By the end of the weekend, some
locations could see up to 4" of rain including any rain that falls
tonight. For now, any flooding looks minimal as rain will fall
over a longer period, but we will keep an eye on this in the
coming days. Temperatures will remain at to below normal for the
next few days, topping out in the mid to lower 80s. Dryer
conditions should return by Tuesday, however long range models
continue to indicate some additional chances into next week.

&&

.AVIATION...(For the 00Z TAFS through 00Z Friday evening)
Issued at 640 PM CDT Thu Jun 18 2020

Scattered thunderstorms continue over southeast Nebraska and may
continue in the vicinity of KLNK and KOMA. KOFK is likely to
remain dry going forward this evening. MVFR conditions will
persist there.

Threat of severe storms at KLNK and KOMA is greatest through 03Z
Friday, but occasional weaker storms are possible all the way
through about 11Z. Cigs as low as 1500 feet are possible at times
at KLNK and KOMA. Generally MVFR conditions to prevail at through
the TAF period there with only temporary cig improvements.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...None.
IA...None.
&&

DISCUSSION...HB
AVIATION...Nicolaisen

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
357 PM CDT Thu Jun 18 2020

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-191100-
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-
357 PM CDT Thu Jun 18 2020

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 Friday

There is a marginal risk for severe weather today. A cold front
will slowly move through the area leading to rain, and possibly
some isolated strong storms. Heavy rain and strong winds are the
most likely threats. The time frame for severe weather will be
from now through 10pm.

.DAYS TWO THROUGH SEVEN...Friday night through Thursday

There are several chances for rain through the weekend which
could lead to elevated stream levels and a risk for flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
617 PM CDT THU JUN 18 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 PM     HAIL             3 N FAIRBURY            40.19N 97.18W
06/18/2020  M1.00 INCH       JEFFERSON          NE   TRAINED SPOTTER

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
646 PM CDT THU JUN 18 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0645 PM     FLASH FLOOD      1 WNW HICKMAN           40.63N 96.65W
06/18/2020                   LANCASTER          NE   EMERGENCY MNGR

            WATER CRESTING AT ROADWAY.

0630 PM     FLASH FLOOD      3 N PANAMA              40.64N 96.50W
06/18/2020                   LANCASTER          NE   EMERGENCY MNGR

            WATER OVER ROADWAY.

0630 PM     FLASH FLOOD      3 NNW FIRTH             40.57N 96.63W
06/18/2020                   LANCASTER          NE   EMERGENCY MNGR

            WATER OVER ROAD.

&&

TSN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
649 PM CDT THU JUN 18 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0602 PM     FLOOD            PALMYRA                 40.70N 96.39W
06/18/2020                   OTOE               NE   PUBLIC

            REPORT FROM MPING: CREEK/RIVER OVERFLOWING;
            CROPLAND/YARD/BASEMENT FLOODING.

&&

TSN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
659 PM CDT THU JUN 18 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0125 PM     TSTM WND DMG     5 E LINCOLN             40.84N 96.60W
06/18/2020                   LANCASTER          NE   PUBLIC

            REPORT FROM MPING: TREES UPROOTED OR
            SNAPPED.

&&

TSN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
702 PM CDT THU JUN 18 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0625 PM     HAIL             JANSEN                  40.19N 97.08W
06/18/2020  E1.00 INCH       JEFFERSON          NE   TRAINED SPOTTER

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
707 PM CDT THU JUN 18 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0635 PM     HAIL             HARBINE                 40.19N 96.97W
06/18/2020  E1.00 INCH       JEFFERSON          NE   PUBLIC

&&