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The Dexes / Lightning Report (Storm Events) / 196990

Eventdex · Lightning Report (Storm Events)

GWINNETT

196990 · 33.886, -84.105

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The record

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Event typeevent_typeLightning
NOAA NCEI event IDncei_event_id196,990
Episode IDepisode_id33,909
Begin UTCbegin_utc2009-09-16T23:28:00+00:00
End UTCend_utc2009-09-16T23:28:00+00:00
StatestateGEORGIA
County/zone typecz_typeC
County/zone namecz_nameGWINNETT
Latitudelat33.886
Longitudelon-84.105
End latitudeend_lat33.897
End longitudeend_lon-84.115
Deaths directdeaths_direct0
Deaths indirectdeaths_indirect0
Injuries directinjuries_direct0
Injuries indirectinjuries_indirect0
Damage propertydamage_property50.00K
Damage cropsdamage_crops0.00K
Weather forecast office sourcewfo_sourceNewspaper
Episode narrativeepisode_narrativeA broad cutoff upper low, which had been located over central Texas, was beginning to move very slowly east by the 16th. This upper low, in combination with unusually deep tropical moisture across the region for mid-September, began an extensive period of showers and thunderstorms with very heavy rain. The deep tropical moisture was largely the result of a persistent 850 mb flow from the Gulf of Mexico. The pattern changed very little for nearly a week as the upper low drifted very slowly east, completely cutoff from the main belt of westerlies, which were located well to the north in southern Canada. The first flash flood event of an extended period of historical and record flooding across north and central Georgia, began on the 15th in Gilmer county. A few storms became strong to marginally severe as well.||A historical, record, and catastrophic flood event began to unfolded during this period, mostly in the west central Georgia area, including the western and northwestern suburbs of Atlanta. Major flooding was noted in many other areas of north and central Georgia, including the eastern suburbs of Atlanta, northwest Georgia, and parts of central Georgia. The culprit was a very stagnant upper atmospheric pattern featuring a weak upper low that developed in early September across south Texas and slowly migrated east-northeast through September 22nd, until a more significant upper trough dropping south into the southern plains finally moved the pesky upper low northeast of Georgia. In addition, an unusually deep tropical flow was noted throughout this period. Precipitable water values exceeded 2.0 inches across the area during this time, resulting in extremely efficient rain producing cells. Persistent heavy rain showers and thunderstorms began to plague the area on the 16th, and persisted daily across parts of north and central Georgia.
Event narrativeevent_narrativeThe Atlanta Journal-Constitution reported that lightning struck a home in the 4000 block of Palace Court and a business in the 100 block of Luxomni Road. Both structures suffered minor damage from the resulting fire.
Yearyear2,009

Provenance

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GWINNETT — Lightning Report (Storm Events) — TerraPulse