A strong upper ridge of high pressure built over the Mid-South from July 18th through July 22nd, 2010. Meanwhile, a surface boundary sagged south into Northeast Arkansas that allowed higher dewpoints to pool along the boundary.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MEG wrote it up.
A strong upper ridge of high pressure built over the Mid-South from July 18th through July 22nd, 2010. Meanwhile, a surface boundary sagged south into Northeast Arkansas that allowed higher dewpoints to pool along the boundary. The combination of the heat from the ridge and the higher dewpoints produced heat index readings between 105-109 degrees during this period.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Memphis, TN wrote its last area forecast discussion before the first event at Jul 18, 9:53 AM CST, 1 hour 7 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
7 heat. Local standard time, as filed.
Heat index readings ranged between 105-109 degrees during the afternoon and evening hours.
Heat index readings ranged between 105-109 degrees during the afternoon and evening hours.
Heat index readings ranged between 105-109 degrees during the afternoon and evening hours.
Heat index readings ranged between 105-109 degrees during the afternoon and evening hours.
Heat index readings ranged between 105-109 degrees during the afternoon and evening hours.
Heat index readings ranged between 105-109 degrees during the afternoon and evening hours.
Heat index readings ranged between 105-109 degrees during the afternoon and evening hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arkansas in 2010Every state in 2010This day in weather historyWarnings in Arkansas, July 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 250021, 250022, 250023, 250024, 250027, 250025, 250026.