Alert archive / Nebraska / Special Weather Statements in 2016

Special Weather Statement, NWS Omaha, NE

May 9, 2016Sarpy County, Nebraska

NWS Omaha, NE issued this special weather statement at May 9, 2016, 1:57 AM CDT for Sarpy County, Nebraska. It was in force for 33 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: May 9, 2016, 1:57 AM CDT (06:57 UTC)
Expired: May 9, 2016, 2:30 AM CDT
In force: 33 min
Issued by: NWS Omaha, NE

County Sarpy County, NE

The radar

The Omaha radar (KOAX), 59 km from the middle of the area, began a volume at 06:59 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 00:00Z, 7.0 hours before the alert went out and 59 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: 104 J/kg
Mixed-layer CIN: -194 J/kg
Mixed-layer LCL: 1219 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 73 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 May 8, 11:43 PM CDT, 2 hours 14 minutes earlier.

Area forecast discussion, May 8, 11:43 PM CDT, 2 hours 14 minutes before

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Hazardous weather outlook, May 8, 4:04 PM CDT, 9 hours 53 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
404 PM CDT SUN MAY 8 2016

IAZ069-079-080-090-091-NEZ030-042>045-050>053-065>068-078-088>093-
091115-
POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE-BOONE-PLATTE-COLFAX-
DODGE-WASHINGTON-BUTLER-SAUNDERS-DOUGLAS-SARPY-SEWARD-LANCASTER-
CASS-OTOE-SALINE-JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON-
404 PM CDT SUN MAY 8 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...EAST CENTRAL NEBRASKA...NORTHEAST NEBRASKA AND SOUTHEAST
NEBRASKA.

.DAY ONE...TONIGHT AND MONDAY

THUNDERSTORMS DEVELOPING ACROSS PORTIONS OF WESTERN KANSAS AND
SOUTHERN NEBRASKA ARE EXPECTED MOVE INTO EASTERN NEBRASKA AFTER 8
PM. THE STRONGEST STORMS WILL BE CAPABLE OF LARGE HAIL...DAMAGING
WINDS AND HEAVY RAINFALL AS THEY SHIFT EWD ACROSS EAST-CENTRAL AND
SOUTHEAST NEBRASKA AND SOUTHWEST IOWA LATE THIS EVENING THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SUNDAY

THUNDERSTORMS ARE POSSIBLE AGAIN ON MONDAY AFTERNOON AND EVENING.
SOME OF THESE STORMS MAY STRONG TO SEVERE...WITH HAIL AND GUSTY
WINDS POSSIBLE.

ISOLATED THUNDERSTORMS WILL REMAIN POSSIBLE ON MONDAY NIGHT THROUGH
TUESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

IAZ043-055-056-NEZ011-012-015>018-031>034-091115-
MONONA-HARRISON-SHELBY-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-
MADISON-STANTON-CUMING-BURT-
404 PM CDT SUN MAY 8 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA AND NORTHEAST
NEBRASKA.

.DAY ONE...TONIGHT AND MONDAY

THUNDERSTORMS DEVELOPING ACROSS PORTIONS OF WESTERN KANSAS AND
SOUTHERN NEBRASKA ARE EXPECTED MOVE INTO EASTERN NEBRASKA AFTER 8
PM. THE GREATEST SEVERE WEATHER THREAT IS EXPECTED SOUTH OF THE
AREA. HOWEVER...THE STRONGEST STORMS WILL BE CAPABLE OF LARGE
HAIL...LOCALLY STRONG WIND GUSTS AND HEAVY RAINFALL AS THEY SHIFT
EWD ACROSS NORTHEAST NEBRASKA AND WEST CENTRAL IOWA LATE THIS
EVENING THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SUNDAY

THUNDERSTORMS ARE POSSIBLE AGAIN ON MONDAY AFTERNOON AND EVENING.
SOME OF THESE STORMS MAY STRONG...WITH HAIL AND GUSTY WINDS
POSSIBLE.

ISOLATED THUNDERSTORMS WILL REMAIN POSSIBLE ON MONDAY NIGHT
THROUGH TUESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR MONDAY.

In the hours before

Special weather statement, May 8, 11:38 PM CDT, 2 hours 19 minutes before

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Special weather statement, May 9, 12:09 AM CDT, 1 hour 48 minutes before

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Special weather statement, May 9, 12:22 AM CDT, 1 hour 35 minutes before

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Special weather statement, May 9, 12:45 AM CDT, 1 hour 12 minutes before

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Special weather statement, May 9, 1:05 AM CDT, 52 minutes before

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Special weather statement, May 9, 1:57 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 10:08 PM CDT	Special Weather Statement	OAX	Gage, Jefferson, Johnson, Nemaha, Pawnee, Richardson and 1 more	52 min
May 8, 10:22 PM CDT	Special Weather Statement	OAX	Antelope, Boone	38 min
May 8, 11:11 PM CDT	Special Weather Statement	OAX	Jefferson	49 min
May 8, 11:20 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	25 min
May 8, 11:25 PM CDT	Special Weather Statement	OAX	Seward	50 min
May 8, 11:30 PM CDT	Special Weather Statement	OAX	Madison, Platte	45 min
May 8, 11:38 PM CDT	Special Weather Statement	OAX	Cass	52 min
May 9, 12:09 AM CDT	Special Weather Statement	OAX	Johnson	51 min
May 9, 12:22 AM CDT	Special Weather Statement	OAX	Colfax, Stanton	53 min
May 9, 12:45 AM CDT	Special Weather Statement	OAX	Sarpy	45 min
May 9, 1:05 AM CDT	Special Weather Statement	OAX	Jefferson	40 min
May 9, 2:38 AM CDT	Special Weather Statement	OAX	Jefferson	37 min
May 9, 3:00 AM CDT	Special Weather Statement	OAX	Gage	30 min
May 9, 10:37 AM CDT	Special Weather Statement	OAX	Butler	23 min
May 9, 11:08 AM CDT	Special Weather Statement	OAX	Platte	37 min
May 9, 1:27 PM CDT	Special Weather Statement	OAX	Knox	33 min
May 9, 2:39 PM CDT	Special Weather Statement	OAX	Burt	36 min
May 9, 3:32 PM CDT	Special Weather Statement	OAX	Lancaster	43 min
May 9, 3:56 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	34 min
May 9, 4:25 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	35 min
May 9, 4:29 PM CDT	Special Weather Statement	OAX	Gage	46 min
May 9, 4:32 PM CDT	Tornado Warning Tornado observed	OAX	Lancaster	28 min
May 9, 4:50 PM CDT	Tornado Warning	OAX	Lancaster	25 min
May 9, 4:53 PM CDT	Special Weather Statement	OAX	Richardson	37 min
May 9, 4:57 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	33 min
May 9, 5:02 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Richardson	28 min
May 9, 5:11 PM CDT	Tornado Warning	OAX	Lancaster	34 min
May 9, 5:20 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	25 min
May 9, 5:24 PM CDT	Flash Flood Warning	OAX	Lancaster	3 hr
May 9, 5:36 PM CDT	Severe Thunderstorm Warning	OAX	Cass	24 min
May 9, 5:39 PM CDT	Tornado Warning	OAX	Cass, Lancaster, Otoe	36 min
May 9, 5:43 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	32 min
May 9, 5:49 PM CDT	Tornado Warning	OAX	Cass	26 min
May 9, 5:54 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	36 min
May 9, 5:59 PM CDT	Severe Thunderstorm Warning	OAX	Cass	31 min
May 9, 6:01 PM CDT	Special Weather Statement	OAX	Saline	44 min
May 9, 6:10 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Otoe	35 min
May 9, 6:14 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline	31 min
May 9, 6:14 PM CDT	Tornado Warning Tornado observed	OAX	Cass	16 min
May 9, 6:18 PM CDT	Special Weather Statement	OAX	Lancaster	42 min
May 9, 6:28 PM CDT	Severe Thunderstorm Warning	OAX	Cass	32 min
May 9, 6:41 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline	34 min
May 9, 6:44 PM CDT	Special Weather Statement	OAX	Otoe	46 min
May 9, 6:48 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Otoe	42 min
May 9, 6:51 PM CDT	Special Weather Statement	OAX	Jefferson	39 min
May 9, 6:56 PM CDT	Special Weather Statement	OAX	Cedar	64 min
May 9, 6:43 PM CDT	Special Weather Statement	OAX	Fremont	32 min

Nearby

Special Weather Statements in Nebraska, 2016 Every special weather statement in 2016

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.