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The Dexes / Heavy Rain / 449517

Eventdex · Heavy Rain

SHERMAN

449517 · 41.280, -98.980

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The record

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Event typeevent_typeHeavy Rain
NOAA NCEI event IDncei_event_id449,517
Episode IDepisode_id73,966
Begin UTCbegin_utc2013-05-25T00:00:00+00:00
End UTCend_utc2013-05-25T12:00:00+00:00
StatestateNEBRASKA
County/zone typecz_typeC
County/zone namecz_nameSHERMAN
Latitudelat41.280
Longitudelon-98.980
End latitudeend_lat41.280
End longitudeend_lon-98.980
Deaths directdeaths_direct0
Deaths indirectdeaths_indirect0
Injuries directinjuries_direct0
Injuries indirectinjuries_indirect0
Damage propertydamage_property0.00K
Damage cropsdamage_crops0.00K
Weather forecast office sourcewfo_sourceCoCoRaHS
Episode narrativeepisode_narrativeOn this Friday, scattered thunderstorms formed over southwestern Nebraska during peak heating, from Ogallala down to Imperial. Some of these storms moved northeast, and as they did so, new thunderstorms initiated ahead of them over South Central Nebraska between 10 and 10:30 pm CDT. The two strongest storms were short line segments of multicells. The first developed and affected Sherman and Howard counties. The second was associated with the storms moving in from the west, and affected Dawson county. Severe weather was not widespread. A single report of one inch hail was received in Gothenburg. Elsewhere, trees and power lines were knocked down in Loup City in Sherman county. One inch hail was also reported in the nearby town of Ashton.||The rainfall amounts were far more impressive than the severe weather. After 11:30 pm CDT, additional thunderstorms formed, connecting the two individual storm clusters. This created a continuous line of storms oriented from west-to-east which slowly sank southeastward. Cell training occurred and resulted in widespread rainfall amounts of 2 to 3 inches from Sherman, Howard and Merrick counties across York, Adams, Clay and Thayer counties. The highest totals exceeded 4 inches, in and near Loup City in Sherman county. The synoptic and mesoscale setups were ideal for heavy, excessive rainfall. Surface high pressure was departing the region, with a stationary front extending from the Nebraska Panhandle southeast to Louisiana. An upper-level ridge was over the Plains, just east of South Central Nebraska. A 35 knot low-level jet provided a favorable environment for thunderstorms to develop, transporting increasingly warm, moist air over the front and into South Central Nebraska. Mean layer CAPE averaged around 2,000 J/kg. Precipitable water was around 1.2 inches, which was almost 2 standard deviations above normal for late May.
Event narrativeevent_narrativeA storm total rainfall of 4.01 inches was reported by a Nebraska Rainfall Assessment and Information Network Observer.
Yearyear2,013

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SHERMAN — Heavy Rain — TerraPulse