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The Dexes / Heavy Rain / 171589

Eventdex · Heavy Rain

EMMET

171589 · 43.400, -94.850

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The record

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

Event typeevent_typeHeavy Rain
NOAA NCEI event IDncei_event_id171,589
Episode IDepisode_id29,241
Begin UTCbegin_utc2009-07-15T01:00:00+00:00
End UTCend_utc2009-07-15T01:00:00+00:00
StatestateIOWA
County/zone typecz_typeC
County/zone namecz_nameEMMET
Latitudelat43.400
Longitudelon-94.850
End latitudeend_lat43.400
End longitudeend_lon-94.850
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 complicated weather situation unfolded during the day on the 14th into the evening. A mesoscale convective system moved through the state during the previous night and left a considerable amount of debris cloudiness during the afternoon of the 14th. In addition, a cap developed over the state during the afternoon. A cold front approached Iowa from the northwest and had entered the northwest part of the state by evening. The atmosphere became unstable during the late afternoon hours with most unstable CAPE near 4000 J/kg and lifted indices in the -9 to -12 C range. There was considerable downdraft CAPE available, in excess of 1000 J/kg. The CAPE in the -10 to -30 C layer of the atmosphere was in the 1000 to 1400 J/kg range by evening. Shear values were in the 30 kt range initially. Thunderstorms were slow to develop, but did eventually develop just ahead of the cold front in northwest Iowa. A broken squall line developed by the early evening hours, and translated southeast into the state. The primary mode of severe weather with this event was in the form of hail in spite of the freezing level approaching 15,000 feet. Spotty wind reports of around 60 MPH wind were received in north central and parts of central Iowa. The storms produced hail in many locations. For the most part, the hail was on the order of an inch or so in diameter. The storms moved through Polk County shortly before midnight and produced very large hail. Hail up to 3 inches in diameter was reported to the north and east of Johnston. Considerable damage was done to cars with damaged wind shields and denting. Damage also occurred to roofs.
Event narrativeevent_narrativeSpotter reported very heavy rain with minor flooding in and around Estherville. Several inches of water on some roads along with penny size hail.
Yearyear2,009

Provenance

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EMMET — Heavy Rain — TerraPulse