Severe Thunderstorm Warning 13, NWS Omaha, NE

179 
WWUS53 KOAX 132327
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
627 PM CDT FRI APR 13 2018

NEC147-132336-
/O.CAN.KOAX.SV.W.0013.000000T0000Z-180413T2345Z/
Richardson NE-
627 PM CDT FRI APR 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RICHARDSON COUNTY
IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 900 PM CDT for southeastern
Nebraska.

LAT...LON 4000 9552 4012 9553 4019 9548 4016 9543
      4013 9543 4012 9540 4007 9540 4006 9542
      4003 9540 4003 9536 4000 9531
TIME...MOT...LOC 2325Z 209DEG 49KT 4025 9532 

$$

MEAD

Area Forecast Discussion
National Weather Service Omaha/Valley NE
359 PM CDT Fri Apr 13 2018

.SHORT TERM...(Tonight through Monday)
Issued at 340 PM CDT Fri Apr 13 2018

...BLIZZARD CONDITIONS EXPECTED LATER TONIGHT INTO SATURDAY...

The overall forecast is playing about as expected, with blizzard
conditions developing in northeast NE later tonight. Meanwhile,
severe storms have developed in western IA this afternoon, just
north of a warm front that extends from a surface low that
currently exists between Lincoln and Omaha. Meanwhile severe storms
firing along the dry line in eastern KS will move into southeast
NE within the next 45 minutes. A tornado watch remains in effect
for western IA and extreme southeast NE until 02z.

Regarding headlines, we did expand the blizzard warning a little
further east and south, to include areas northwest of a line from
Seward to Columbus to Thurston, NE. Further east, either winter
storm warnings or winter weather advisories were issued where
winds may lower and snowfall amounts may be lighter. Headlines
remain in effect until 7 pm Saturday. At that time, snow amounts
and winds will winding down. We may have to eventually extend some
of these winter headlines a little further into Saturday evening.
A few snow showers could linger across western IA Sunday morning,
but essentially the event is over by that time.

Regarding snowfall amounts, they did trend up just slightly,
looking for 8 to 15 inches in northeast NE, transitioning to 1
to 2 inches along I80, and an inch or less in extreme southeast NE
and southwest IA. With the strong winds gusting to 45 mph or
higher for much of the area, getting an accurate measurement may
become quite difficult. And along I80, amounts may tend to melt on
treated roads. There could be a light glazing with wet untreated roads
as temps drop below freezing, but overall not expecting
significant icing with this system.

Regarding visibility, where the blizzard warning is in effect, we
are expecting widespread visibility 1/4 or less with whiteout
conditions, especially in open areas. This will create significant
blowing and drifting snow. Travel may become impossible in parts
of central through northeast NE. Reports from central NE suggest
this is already occurring, and it should move eastward overnight.
Opted to expand the blizzard warning southward to include I80
eastward up to Seward.

Dry weather on Monday.

.LONG TERM...(Monday night through Friday)
Issued at 340 PM CDT Fri Apr 13 2018

Given the immediate short term weather concerns, did not have a
lot of time to spend on this period. Model blends suggest another
chance of mostly rain Tuesday afternoon into early Wednesday, and
another chance of rain next Friday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1256 PM CDT Fri Apr 13 2018

Variable ceilings and surface winds at KOMA/KLNK with the warm
front in the vicinity/just to the south. Thunderstorms possible
near KOMA this afternoon and think storms may remain east of
KLNK, but included showers there. Will need to metwatch and adjust
as needed as convection develops.  IFR/LIFR conditions at KOFK
with showers and isolated thunderstorms possible with ra/sn around
06Z changing to all snow/blsn around 08Z. Northeast to north winds
will increase 20-30kts with gusts 30 to 38kts.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...Winter Weather Advisory from 9 AM to 7 PM CDT Saturday for
     NEZ045-052-053-066-067-078-088-089.

     Blizzard Warning from 4 AM to 7 PM CDT Saturday for NEZ015-033-
     043-050-065.

     Winter Storm Warning from 7 AM to 7 PM CDT Saturday for NEZ034-
     044-051.

     Blizzard Warning from 1 AM to 7 PM CDT Saturday for NEZ018-032-
     042.

     Blizzard Warning from 10 PM this evening to 7 PM CDT Saturday
     for NEZ012-017-030-031.

     Blizzard Warning from 7 PM this evening to 7 PM CDT Saturday for
     NEZ011-016.

IA...Winter Weather Advisory from 9 AM to 7 PM CDT Saturday for
     IAZ055-056.

     Winter Storm Warning from 7 AM to 7 PM CDT Saturday for IAZ043.

&&

SHORT TERM...DeWald
LONG TERM...DeWald
AVIATION...Zapotocny

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
510 PM CDT Fri Apr 13 2018

NEZ011-012-015>018-030>033-042>044-050-065-141215-
Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-Stanton-
Cuming-Platte-Colfax-Dodge-Butler-Seward-
510 PM CDT Fri Apr 13 2018

This Hazardous Weather Outlook is for portions of east central
Nebraska...northeast Nebraska and southeast Nebraska.

.DAY ONE...Tonight and Saturday

Rain will change over to snow tonight, with blizzard conditions
developing. North or northwest winds will increase into the 25 to
35 mph range with gusts to 45 t0 50 mph possible. Storm total
snowfall could range from 3 to 7 inches from Seward, NE to
Thurston, NE, to as much as 8 to 15 inches in northeast NE north
of a line from Neligh to Hartington. Whiteout conditions will
develop through the night. Significant blowing and drifting of
snow is possible, and travel may become extremely difficult if not
impossible later tonight into Saturday.

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

Snow and wind taper off Saturday evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed tonight, but spotters are
encouraged to report snowfall amounts if possible.

IAZ043-055-056-NEZ034-045-051>053-066-067-078-088-089-141215-
Monona-Harrison-Shelby-Burt-Washington-Saunders-Douglas-Sarpy-
Lancaster-Cass-Saline-Jefferson-Gage-
510 PM CDT Fri Apr 13 2018

This Hazardous Weather Outlook is for portions of southwest
Iowa...west central Iowa...east central Nebraska and southeast
Nebraska.

.DAY ONE...Tonight and Saturday

While an isolated thunderstorm will be possible this evening,
severe storms are not expected. The main focus is the development
of wintry weather as rain develops tonight, then changes to snow
from northwest to southeast. As the snow develops, winds will also
be increasing to 25 to 35 with higher gusts, which will create
areas of blowing snow and possible some drifting. Snow amounts of
2 to 4 inches are forecast.

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

Snow and blowing snow will continue Saturday evening, but will
taper off before daybreak Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will probably not be needed tonight.

IAZ069-079-080-090-091-NEZ068-090>093-141215-
Pottawattamie-Mills-Montgomery-Fremont-Page-Otoe-Johnson-Nemaha-
Pawnee-Richardson-
510 PM CDT Fri Apr 13 2018

This Hazardous Weather Outlook is for portions of southwest Iowa
and southeast Nebraska.

.DAY ONE...Tonight and Saturday

Severe thunderstorms will still be possible through 9 pm this
evening. A tornado watch remains in effect for extreme southeast
NE and southwest IA, with large hail, damaging winds, and isolated
tornadoes still possible.

Rain develops late tonight or early Saturday, then changes to snow
Saturday afternoon. Snow amounts will generally range around an
inch or less, or slightly more in some areas.

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

Snow and blowing snow continues Saturday night, but should taper
early early Sunday morning.

.SPOTTER INFORMATION STATEMENT...

Ongoing warnings remain in effect in some locations. Thus, spotter
activation will still be needed through early evening.

DeWald

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
408 PM CDT FRI APR 13 2018

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

0404 PM     HAIL             2 S OAKLAND             41.28N 95.40W
04/13/2018  E1.75 INCH       POTTAWATTAMIE      IA   STORM CHASER

&&

SFORTIN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
413 PM CDT FRI APR 13 2018

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

0409 PM     HAIL             2 S HENDERSON           41.11N 95.43W
04/13/2018  E1.75 INCH       MILLS              IA   STORM CHASER

            NICKEL TO QUARTER SIZED HAIL ALSO REPORTED

&&

SFORTIN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
429 PM CDT FRI APR 13 2018

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

0411 PM     HAIL             5 E HENDERSON           41.14N 95.33W
04/13/2018  M2.00 INCH       MONTGOMERY         IA   PUBLIC

            PICTURED SHARED VIA SM

&&

SFORTIN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
444 PM CDT FRI APR 13 2018

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

0442 PM     HAIL             AUBURN                  40.39N 95.84W
04/13/2018  E0.88 INCH       NEMAHA             NE   EMERGENCY MNGR

&&

SFORTIN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
505 PM CDT FRI APR 13 2018

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

0455 PM     TSTM WND GST     5 S NEBRASKA CITY       40.61N 95.87W
04/13/2018  M62 MPH          OTOE               NE   AWOS

&&

CZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
528 PM CDT FRI APR 13 2018

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

0415 PM     HAIL             WALNUT                  41.48N 95.22W
04/13/2018  M1.00 INCH       POTTAWATTAMIE      IA   PUBLIC

            DELAYED REPORT. RELAYED BY WFO DMX.

&&

CZ