Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS Omaha, NE

July 10, 20215 counties in Nebraska; Harrison County, Monona County, Iowa

NWS Omaha, NE issued this special weather statement at Jul 10, 2021, 1:31 PM CDT for 5 counties in Nebraska; Harrison County, Monona County, Iowa. It was in force for 74 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 10, 2021, 1:31 PM CDT (18:31 UTC)
Expired: Jul 10, 2021, 2:45 PM CDT
In force: 74 min
Issued by: NWS Omaha, NE

Counties Harrison County, IA, Monona County, IA, Dodge County, NE, Douglas County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE

The radar

The Omaha radar (KOAX), 25 km from the middle of the area, began a volume at 18:34 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 nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 6.5 hours before the alert went out and 26 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 976 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 10, 12:47 PM CDT, 44 minutes earlier.

Area forecast discussion, Jul 10, 12:47 PM CDT, 44 minutes before

Area Forecast Discussion
National Weather Service Omaha/Valley NE
1247 PM CDT Sat Jul 10 2021

...Updated Aviation Forecast Discussion...

.DISCUSSION...
Issued at 345 AM CDT Sat Jul 10 2021

After a busy evening/early morning of widespread severe storms with
damaging winds leading to widespread power outages, cooler
temperatures are expected for the remainder of the weekend with
scattered showers and thunderstorms in the forecast.

Scattered showers and thunderstorms are expected to continue
through much of the day as a mid/upper level shortwave trough
continues to dig across the area today and eventually closes off
just to our east. This positions the region in northwesterly flow
aloft keeping temperatures cooler than normal with off and on
showers through Sunday morning.

This upper system should finally eject eastward by early Monday
allowing upper flow to become more zonal as we move toward mid-
week and warms temperatures back to near-normal by mid-week. A
shortwave trough moving east across the northern Plains will give
the region the next shot of precipitation mid-week.

&&

.AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon)
Issued at 1245 PM CDT Sat Jul 10 2021

Mid-level shortwave and attendant cold core generating large area
of showers and embedded thunderstorms. Outflow ahead of convection
inducing enough cooling and boundary subsidence to lower ceilings
into MVFR categories. Prevailing thunderstorms will move into KOMA
and KLNK, and already are occurring at KOFK. Expect showers and
storms to persist bulk of the afternoon into the evening hours,
until cold core moves across the area. In the wake of
precipitation, expect MVFR and perhaps IFR ceilings to continue
for the bulk of the TAF period.

&&

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

DISCUSSION...Kern
AVIATION...Fortin

Hazardous weather outlook, Jul 10, 10:37 AM CDT, 2 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
1037 AM CDT Sat Jul 10 2021

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-110545-
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-
1037 AM CDT Sat Jul 10 2021

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

.DAY ONE...This Afternoon and Tonight

Scattered thunderstorms are possible across much of the region
today. Isolated strong to severe thunderstorms are possible
across portions of southeast Nebraska and southwest Iowa this
afternoon. Damaging winds and would be the primary hazards.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Some lingering non-severe storms are possible into Sunday. There
is another chance for thunderstorms Wednesday into Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

In the hours before

Local storm report, Jul 10, 11:32 AM CDT, 1 hour 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1132 AM CDT SAT JUL 10 2021

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

1152 PM     TSTM WND DMG     3 WSW DAYKIN            40.31N 97.35W
07/09/2021                   JEFFERSON          NE   EMERGENCY MNGR

            DELAYED REPORT. TIME ESTIMATED FROM RADAR.
            DAMAGE TO GRAIN BIN AND ROOF.

&&

Local storm report, Jul 10, 11:33 AM CDT, 1 hour 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1133 AM CDT SAT JUL 10 2021

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

1058 AM     TSTM WND DMG     1 N BANCROFT            42.02N 96.57W
07/09/2021                   CUMING             NE   LAW ENFORCEMENT

            DELAYED REPORT. TIME ESTIMATED FROM RADAR.
            FLATTENED CORN.

&&

CA

Local storm report, Jul 10, 11:48 AM CDT, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1148 AM CDT SAT JUL 10 2021

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

1053 PM     TSTM WND DMG     6 N SCHUYLER            41.53N 97.06W
07/09/2021                   COLFAX             NE   LAW ENFORCEMENT

            DELAYED REPORT. TIME ESTIMATED FROM RADAR.
            SPORADIC DAMAGE TO TREES NORTH OF SCHUYLER.

&&

CA

Local storm report, Jul 10, 11:53 AM CDT, 1 hour 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1153 AM CDT SAT JUL 10 2021

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

1113 PM     TSTM WND DMG     HARLAN                  41.65N 95.33W
07/09/2021                   SHELBY             IA   LAW ENFORCEMENT

            DELAYED REPORT. TIME ESTIMATED FROM RADAR.
            TREES DOWN.

&&

CA

Local storm report, Jul 10, 12:14 PM CDT, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1214 PM CDT SAT JUL 10 2021

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

1152 PM     TSTM WND DMG     WESTERN                 40.39N 97.20W
07/09/2021                   SALINE             NE   PUBLIC

            DELAYED REPORT. TIME ESTIMATED FROM RADAR.
            ROOF TORN OFF OF GRAIN BIN.

&&

CA

Special weather statement, Jul 10, 1:31 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
131 PM CDT Sat Jul 10 2021

IAZ043-055-069-NEZ034-044-045-051>053-101945-
Pottawattamie IA-Monona IA-Harrison IA-Saunders NE-Sarpy NE-Burt NE-
Washington NE-Douglas NE-Dodge NE-
131 PM CDT Sat Jul 10 2021

...SIGNIFICANT WEATHER ADVISORY FOR MONONA...WESTERN POTTAWATTAMIE...
HARRISON...SARPY...SOUTHERN BURT...WASHINGTON...DODGE...DOUGLAS AND
SAUNDERS COUNTIES UNTIL 245 PM CDT...

At 131 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles west of Pisgah to 7 miles east of
Nickerson to near Cedar Bluffs. Movement was southeast at 40 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Omaha, Council Bluffs, Bellevue, Fremont, Papillion, La Vista, Blair,
Ralston, Wahoo, Gretna, Onawa, Missouri Valley, Ashland, Valley,
Tekamah, Logan, Springfield, Arlington, North Bend and Yutan.

This includes the following highways...
 Interstate 29 between mile markers 43 and 107.
 Interstate 80 in Iowa between mile markers 1 and 14.
 Interstate 80 in Nebraska between mile markers 428 and 454.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4116 9578 4116 9588 4105 9588 4107 9604
      4100 9620 4105 9632 4102 9635 4102 9646
      4105 9647 4105 9660 4151 9684 4174 9651
      4190 9616 4221 9593 4221 9567 4187 9567
      4186 9556 4170 9556
TIME...MOT...LOC 1831Z 328DEG 33KT 4185 9607 4157 9632 4136 9667

CA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 9:30 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	45 min
Jul 9, 9:50 PM CDT	Special Weather Statement	OAX	Antelope, Boone	10 min
Jul 9, 10:12 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Cedar, Knox, Madison, Pierce, Stanton and 1 more	48 min
Jul 9, 10:15 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Platte	45 min
Jul 9, 10:52 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston	38 min
Jul 9, 10:56 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Dodge, Platte, Saunders	64 min
Jul 9, 11:00 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Madison, Pierce, Stanton, Wayne	45 min
Jul 9, 11:19 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Dodge	41 min
Jul 9, 11:26 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Gage, Lancaster, Saline, Saunders, Seward	64 min
Jul 9, 11:38 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Dodge, Douglas, Saunders, Washington	52 min
Jul 9, 11:41 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Cuming, Dodge, Platte, Saunders and 1 more	49 min
Jul 9, 11:46 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson	44 min
Jul 9, 11:55 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Douglas, Gage, Johnson, Lancaster, Otoe and 2 more	65 min
Jul 10, 12:11 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Pawnee	49 min
Jul 10, 12:26 AM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders, Washington	19 min
Jul 10, 12:40 AM CDT	Severe Thunderstorm Warning	OAX	Otoe	50 min
Jul 10, 12:42 AM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders, Washington	18 min
Jul 10, 12:44 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Gage, Johnson, Nemaha, Otoe, Pawnee and 1 more	61 min
Jul 10, 1:56 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Sarpy, Saunders, Washington	64 min
Jul 10, 4:18 PM CDT	Special Weather Statement	OAX	Pawnee, Richardson	27 min
Jul 9, 11:02 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	29 min
Jul 9, 11:30 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Mills, Montgomery, Pottawattamie, Shelby	45 min
Jul 10, 12:13 AM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Pottawattamie	47 min
Jul 10, 2:18 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	42 min

Nearby

Special Weather Statements in Nebraska, 2021 Special Weather Statements in Iowa, 2021 Every special weather statement in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.