Page:2024 Greenfield Tornado Finalized Report.pdf/2

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Event Tornado
-- Scale EFU
-- Length 0.13 Miles
-- Width 90 Yards
State IOWA
County/Area TAYLOR
WFO DMX
Report Source NWS Storm Survey
NCEI Data Source CSV
Begin Date 2024-05-21 13:59 CST-6
Begin Location 3N GUSS
Begin Lat/Lon 40.8996/-94.9285
End Date 2024-05-21 14:00 CST-6
End Location 4N GUSS
End Lat/Lon 40.9007/-94.9265
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 0.00K
Episode Narrative PLEASE NOTE, for hail, wind, heavy rain and flooding, please see separate Storm Data entry for May 20-22.

Numerous tornadoes occurred on this day with numerous injuries and four fatalities at Greenfield in Adair County.

Multiple rounds of thunderstorms brought torrential rainfall, damaging winds, hail and destructive tornadoes to the state. These thunderstorms were the result of a low pressure system which lifted north into the area on the night of May 20th, 2024, producing slow moving storms that dropped 2 to 4 inches of rainfall. This resulted in flash flooding over portions of northern and central Iowa through the morning of May 21st, 2024.

Following the heavy rainfall through the morning, skies cleared out ahead of an approaching cold front. By the afternoon hours of May 21st, 2024, this cold front produced a line of strong thunderstorms which produced multiple strong tornadoes throughout the state, including one which led to significant damage in the town of Greenfield, IA, among other locations. This line of storms also produced damaging winds, leading to widespread tree damage and power outages throughout the forecast area.

Event Narrative This tornado moved from Page County into Taylor County. The path was very short in Taylor County only catching the extreme northwest corner of the county. No impacts to damage indicators occurred along the path, hence the EFU rating for this portion of the path.