POLK

235119 · 41.640, -93.660

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The record

Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.

Event typeevent_type	Lightning
NOAA NCEI event IDncei_event_id	235,119
Episode IDepisode_id	40,412
Begin UTCbegin_utc	2010-07-24T03:25:00+00:00
End UTCend_utc	2010-07-24T03:25:00+00:00
Statestate	IOWA
County/zone typecz_type	C
County/zone namecz_name	POLK
Latitudelat	41.640
Longitudelon	-93.660
End latitudeend_lat	41.640
End longitudeend_lon	-93.660
Deaths directdeaths_direct	0
Deaths indirectdeaths_indirect	0
Injuries directinjuries_direct	0
Injuries indirectinjuries_indirect	0
Damage propertydamage_property	1.00K
Damage cropsdamage_crops	0.00K
Weather forecast office sourcewfo_source	Trained Spotter
Episode narrativeepisode_narrative	A very unstable airmass was in place over Iowa ahead of an approaching cold front and short wave. The cold front itself was over South Dakota, and set off a line of severe thunderstorms in front of it. Over central into south central Iowa, extending into the northeast counties, strong to severe thunderstorms broke out shortly after peak heating. Daytime highs reached the mid 80s to mid 90s across the state with dew points in the upper 70s to low 80s. Precipitable water values increased to between 1.8 and 2.3 inches across the central counties. CAPE increased to 4000-5000 J/kg with lifted indices falling to the -8 to -11 C range. The atmosphere was moderately sheared with 35 to 50 kts of shear available. The LCL was a relatively low 500 to 1000 meters. Downdraft CAPE was 1000 to 1700 J/kg, with 700-1000 J/kg of CAPE in the -10 to -30 C layer of the atmosphere. The freezing level was between 15,000 and 15,500 feet. Thunderstorms fired in central Iowa and became severe quite quickly. One storm produced two tornadoes in the Indianola area of Warren County. One hit to the west of Indianola. Several houses were damaged near Euclid St and Y Street. Houses and barns were damaged at the intersection of R63 and Hover Street. The total number of homes damages was 22 with 5 sustaining major damage. The major damage included wall damage to homes, collapsed walls on garages, and uplift of decks and roofs. The wind speed was around 100 MPH. The second one touched down just east of the main part of town and caused building damage. Damage included inward and outward collapse of overhead doors to a garage and metal outbuildings. It was on the ground for less than one half mile and produced winds around 90 MPH. The storms went on to produce wind gusts in excess of 60 MPH in Marion and Jasper Counties. Damage was reported to farmsteads, as well as to trees and power lines. The storms were heavy rain producers. Heavy rain fell, with 2 to 3 inches of rain falling in about an hour over Warren County. Reports of 1 to 2 feet of flowing water over Highway 92 were received. Water stranded people in a trailer court west of Highway 65/60 south of Indianola. Attention turned to storms forming closer to the cold front. Strong to severe thunderstorms moved into northwest Iowa and produced severe weather after midnight in north central Iowa. Wind damage was reported in the Mason City area shortly after midnight. Heavy rainfall continued over north central Iowa. Parts of the area around Waterloo and Dewar received between 4 and 9 inches of rain over the previous 48 hours, 2 to 5 of which fell just prior to the flash flooding. The flooding closed roads in the area. Lightning struck a house north of Des Moines during the evening. Damage was limited, but circuits were blown out.
Event narrativeevent_narrative	Lightning hit a house and caused some blown circuits.
Yearyear	2,010

Provenance

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