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The Dexes / Funnel Cloud / 248347

Eventdex · Funnel Cloud

BUTLER

248347 · 42.660, -92.910

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The record

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Event typeevent_typeFunnel Cloud
NOAA NCEI event IDncei_event_id248,347
Episode IDepisode_id42,570
Begin UTCbegin_utc2010-09-07T00:16:00+00:00
End UTCend_utc2010-09-07T00:16:00+00:00
StatestateIOWA
County/zone typecz_typeC
County/zone namecz_nameBUTLER
Latitudelat42.660
Longitudelon-92.910
End latitudeend_lat42.660
End longitudeend_lon-92.910
Deaths directdeaths_direct0
Deaths indirectdeaths_indirect0
Injuries directinjuries_direct0
Injuries indirectinjuries_indirect0
Damage propertydamage_property0.00K
Damage cropsdamage_crops0.00K
Weather forecast office sourcewfo_sourceTrained Spotter
Episode narrativeepisode_narrativeA dynamic system rolled through the upper Midwest during the day on the 6th into the evening hours. A strong upper level system, combined with a sharp cold front, moved through Iowa during the evening hours of the 7th. The atmosphere was capped during the day with elevated showers moving across the state. During the late afternoon, the mid level cap broke down. Instability was sufficient with nearly 2000 J/kg of CAPE available, and lifted indices in the -5 to -9 C range. CAPE in the -10 to -30 C layer of the atmosphere was around 600 J/kg and downdraft CAPE values were under 1000 J/kg. Temperatures during the day were in the low to mid 80s, combined with dew points in the mid to upper 60s just ahead of the cold front. The system was somewhat moisture starved with precipitable water values in the 1.25 to 1.6 inch range. The freezing level was quite high for early September, around 14,000 feet. A narrow line of thunderstorms formed just ahead of the cold front by late afternoon. The storms raced east-northeast at 55 to 60 MPH. A small section of the line became severe over parts of north central into northeast Iowa. One funnel cloud was reported in Butler County with the storms. Spotty reports of hail of penny to quarter size were received. High winds blew out a porch window in Butler County. Earlier, thunderstorms produced 60 MPH winds in the Lake Mills area, overturning a trailer and snapping a power poll off at the top.
Event narrativeevent_narrativeA spotter reported a brief funnel that dissipated quickly.
Yearyear2,010

Provenance

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BUTLER — Funnel Cloud — TerraPulse