Alert archive / Iowa / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 9, NWS Omaha, NE

June 12, 1987Cass County, Nebraska; Fremont County, Mills County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jun 12, 1987, 3:56 PM CDT for Cass County, Nebraska; Fremont County, Mills County, Iowa. It was in force for 64 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 12, 1987, 3:56 PM CDT (20:56 UTC)
Expired: Jun 12, 1987, 5:00 PM CDT
In force: 64 min
Issued by: NWS Omaha, NE
Area: Whole counties

Counties Fremont County, IA, Mills County, IA, Cass County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jun 12, 4:30 PM CDT	Thunderstorm Wind 50	Fremont, IA
Jun 12, 5:05 PM CDT	Thunderstorm Wind 50	Fremont, IA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.9 hours before the alert went out and 68 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: 3585 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Jun 12, 2:16 PM CDT, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
215 PM CDT FRI JUN 12 1987

...STRONG THUNDERSTORMS DEVELOPING RAPIDLY IN EAST CENTRAL NEBRASKA...

AT 215 PM CDT STRONG THUNDERSTORMS WERE DEVELOPING IN EAST CENTRAL
NEBRASKA.  THE STRONGEST STORM WAS LOCATED JUST NORTHEAST OF FREMONT
IN SOUTWEST WASHINGTON COUNTY...25 MILES NORTHWEST OF OMAHA.  THIS
STORM WILL LIKELY PRODUCE STRONG WIND GUSTS TO 45 MPH...HEAVY RAIN
AND SOME SMALL HAIL AS IT MOVES SOUTHEAST ACROSS SOUTHERN WASHINGTON
AND NORTHERN DOUGLAS COUNTY NEBRASKA UNTIL 315 PM CDT.

THE STORMS WERE MOVING EAST TO SOUTHEAST AT 15 MPH.

LISTEN FOR LATER STATEMENTS BE PREPARED TO SEEK A PLACE OF SAFETY
SHOULD SEVERE WEATHER DEVELOP.

BYRD

Local storm report, Jun 12, 2:47 PM CDT, 1 hour 9 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE OMAHA NE
245 PM CDT FRI MAY 12 1987

240 PM CDT  AT FREMONT...PEA TO MARBLE SIZE HAIL...WINDS 35 TO 45
            MPH...REPORTED BY SHERIFF.
245 PM CDT  NICKERSON NE...SMALL HAIL...RAINFALL 1.11 IN LESS THAN
            1 HOUR.

BYRD

Local storm report, Jun 12, 2:48 PM CDT, 1 hour 8 minutes before

STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE OMAHA NE
245 PM CDT FRI JUN 12 1987

240 PM CDT  AT FREMONT...PEA TO MARBLE SIZE HAIL...WINDS 35 TO 45
            MPH...REPORTED BY SHERIFF.
245 PM CDT  NICKERSON NE...SMALL HAIL...RAINFALL 1.11 IN LESS THAN
            1 HOUR.

BYRD

Local storm report, Jun 12, 3:08 PM CDT, 48 minutes before

STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE OMAHA NE
310 PM CDT FRI JUN 12 1987

307 PM CDT  AT FREMONT...GOLF TO SOFTBALL SIZE HAIL...
            REPORTED BY SHERIFF.

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 2:55 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Washington	65 min
Jun 12, 2:55 PM CDT	Severe Thunderstorm Warning	OAX	Saunders	65 min
Jun 12, 3:56 PM CDT	Severe Thunderstorm Warning	OAX	Douglas	64 min
Jun 12, 4:56 PM CDT	Severe Thunderstorm Warning	OAX	Otoe	64 min
Jun 12, 5:12 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	23 min
Jun 12, 5:34 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Richardson	56 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1987 Severe Thunderstorm Warnings in Nebraska, 1987 Every severe thunderstorm warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.