Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 100, NWS Omaha, NE

May 30, 2016Harrison County, Shelby County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at May 30, 2016, 11:19 PM CDT for Harrison County, Shelby County, Iowa. 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: May 30, 2016, 11:19 PM CDT (04:19 UTC)
Expired: May 30, 2016, 11:45 PM CDT
In force: 26 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Harrison County, IA, Shelby County, IA

The radar

The Omaha radar (KOAX), 78 km from the middle of the area, began a volume at 04:21 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, 4.3 hours before the alert went out and 78 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: 609 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1720 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

Open this sounding in Storm Lab

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 May 30, 6:19 PM CDT, 5 hours earlier.

Area forecast discussion, May 30, 6:19 PM CDT, 5 hours before

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Hazardous weather outlook, May 30, 5:31 PM CDT, 5 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
531 PM CDT MON MAY 30 2016

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-088>090-092-311245-
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-JEFFERSON-GAGE-
JOHNSON-PAWNEE-
531 PM CDT MON MAY 30 2016

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 TUESDAY

SCATTERED THUNDERSTORMS ARE POSSIBLE IN THE LATE AFTERNOON TO
EARLY EVENING HOURS TODAY. SOME OF THESE STORMS MAY BE
STRONG...WITH SMALL HAIL AND GUSTY WINDS.

THERE IS A SLIGHT CHANCE OF SEVERE STORMS ACROSS PORTIONS OF
EASTERN NEBRASKA LATE THIS EVENING AND TONIGHT INTO TUESDAY
MORNING ALONG A SOUTHEASTWARD MOVING COLD FRONT. LARGE
HAIL...DAMAGING WINDS...AND HEAVY RAIN WILL BE THE PRIMARY
HAZARDS.

.DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH MONDAY

THERE IS A CHANCE OF THUNDERSTORMS ON FRIDAY EVENING AND FRIDAY
NIGHT...INCLUDING A POTENTIAL FOR STRONG THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT OR TUESDAY.

NEZ078-091-093-311245-
SALINE-NEMAHA-RICHARDSON-
531 PM CDT MON MAY 30 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
NEBRASKA.

.DAY ONE...TONIGHT AND TUESDAY

MINOR FLOODING WILL CONTINUE IN THE BIG BLUE RIVER BASIN AND ALSO
ALONG THE MISSOURI RIVER FROM BROWNVILLE TO RULO.

SCATTERED THUNDERSTORMS ARE POSSIBLE IN THE LATE AFTERNOON TO
EARLY EVENING HOURS TODAY. SOME OF THESE STORMS MAY BE
STRONG...WITH SMALL HAIL AND GUSTY WINDS.

THERE IS A SLIGHT CHANCE OF SEVERE STORMS ACROSS PORTIONS OF
EASTERN NEBRASKA LATE THIS EVENING AND TONIGHT INTO TUESDAY
MORNING ALONG A SOUTHEASTWARD MOVING COLD FRONT. LARGE
HAIL...DAMAGING WINDS...AND HEAVY RAIN WILL BE THE PRIMARY
HAZARDS.

.DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH MONDAY

THERE IS A CHANCE OF THUNDERSTORMS ON FRIDAY EVENING AND FRIDAY
NIGHT...INCLUDING A POTENTIAL FOR STRONG THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT OR TUESDAY.

MAYES

In the hours before

Special weather statement, May 30, 5:41 PM CDT, 5 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
541 PM CDT MON MAY 30 2016

IAZ091-302315-
PAGE IA-
541 PM CDT MON MAY 30 2016

...SPECIAL WEATHER STATEMENT...

AT 541 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
BLANCHARD...OR 14 MILES NORTHEAST OF TARKIO...MOVING NORTHEAST AT 15
MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
CLARINDA...COIN...BLANCHARD...COLLEGE SPRINGS...SHAMBAUGH...
BRADDYVILLE...YORKTOWN AND HEPBURN.

LAT...LON 4058 9525 4086 9518 4086 9493 4073 9493
      4073 9491 4057 9492
TIME...MOT...LOC 2241Z 235DEG 12KT 4060 9519

KG

Special weather statement, May 30, 5:44 PM CDT, 5 hours 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
544 PM CDT MON MAY 30 2016

IAZ043-055-302315-
HARRISON IA-MONONA IA-
544 PM CDT MON MAY 30 2016

...SPECIAL WEATHER STATEMENT...

AT 544 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 6
MILES NORTH OF LOGAN...OR 30 MILES SOUTHWEST OF DENISON...MOVING
NORTHEAST AT 15 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
LOGAN...WOODBINE...MAGNOLIA AND WILLOW LAKE RECREATION AREA.

LAT...LON 4165 9578 4172 9594 4188 9584 4182 9570
      4175 9560
TIME...MOT...LOC 2244Z 218DEG 13KT 4174 9580

KG

Local storm report, May 30, 5:55 PM CDT, 5 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
555 PM CDT MON MAY 30 2016

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

0555 PM     HAIL             CLARINDA                40.74N 95.04W
05/30/2016  E0.88 INCH       PAGE               IA   CO-OP OBSERVER

&&

BMAYES

Special weather statement, May 30, 6:12 PM CDT, 5 hours 7 minutes before

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Local storm report, May 30, 6:26 PM CDT, 4 hours 53 minutes before

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Local storm report, May 30, 6:40 PM CDT, 4 hours 39 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 30, 7:56 PM CDT	Special Weather Statement	OAX	Douglas	49 min
May 30, 8:02 PM CDT	Special Weather Statement	OAX	Fremont	43 min
May 30, 9:18 PM CDT	Special Weather Statement	OAX	Fremont	42 min
May 30, 10:12 PM CDT	Special Weather Statement	OAX	Mills	48 min
May 30, 10:56 PM CDT	Special Weather Statement	OAX	Harrison	49 min
May 30, 11:43 PM CDT	Special Weather Statement	OAX	Shelby	32 min
May 30, 7:07 PM CDT	Special Weather Statement	OAX	Atchison	23 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2016 Every severe thunderstorm warning 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.