A well-organized upper level low moved east from the central Plains into the Mid Missouri Valley during the day. Very strong winds aloft accompanied this system. A streak of very strong mid level winds punched northeast from the Arklatex region into the Lower Ohio Valley during the afternoon. A low level jet from 50 to 60 knots over the Lower Mississippi Valley nosed into the Lower Ohio Valley. At the surface, a low pressure center tracked from north central Arkansas to near St. Louis by late afternoon. Though surface dew points climbed into the lower to mid 60's, extensive cloudcover along and ahead of a warm front limited instability. The instability was generally weak, characterized by cape values below 1000 j/kg. Most of the damage was the result of a line of thunderstorms that suddenly accelerated northeast from New Madrid and Mississippi Counties.

Thunderstorm Wind in NEW MADRID, MISSOURI
From 24-APR-10 12:00:00 to 24-APR-10 12:00:00 (CST-6)
Location: HOWARDVILLE
Magnitude: 56.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A new farmer's market and flea market structure was destroyed. The structure was an open structure with no solid walls. A temporary booth-like structure used for auctions was blown over. The damage was near the 44-mile marker on Interstate 55.

Thunderstorm Wind in MISSISSIPPI, MISSOURI
From 24-APR-10 12:18:00 to 24-APR-10 12:28:00 (CST-6)
Location: EAST PRAIRIE
Magnitude: 104.00 EG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A macroburst approximately eight miles long and three miles wide struck the East Prairie area with winds up to 120 mph. The origins of the macroburst were in New Madrid County, but the vast majority of the event occurred in Mississippi County. The highest concentration of damage was in East Prairie. On County Road 535 on the outskirts of East Prairie, two mobile homes were demolished. A single-wide mobile home was completely separated from the frame, which was blown 100 yards until it struck a brick house. The sole occupant of the mobile home was a young adult who received only numerous minor abrasions that did not require hospitalization. A second nearby single-wide mobile home was blown a very short distance into trees and destroyed. This mobile home had been vacant for years. Both mobile homes were tied down. A nearby house lost most of the roof, and a large section of the windward-facing exterior wall was blown in. In the city of East Prairie, three industrial buildings were heavily damaged or destroyed. A large industrial block building was partially unroofed, a wood frame metal building was destroyed, and a wooden industrial shop was destroyed. The roof of the police department was damaged.  Numerous trees were blown down in and near East Prairie, some damaging homes. Several farm buildings received minor to major damage southwest of town. Outside of town, several irrigation pivots were blown over, a barn was damaged, and a travel trailer was overturned. An empty grain bin was blown away. The peak wind of 120 mph was supported by damage to several structures, including the industrial buildings in East Prairie and the house and mobile homes on the outskirts of town. This was among the strongest downbursts ever documented in southeast Missouri.

Thunderstorm Wind in NEW MADRID, MISSOURI
From 24-APR-10 12:16:00 to 24-APR-10 12:18:00 (CST-6)
Location: HENDERSON MOUND
Magnitude: 100.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This intense macroburst began in northeast New Madrid County, but the vast majority of the damage was in Mississippi County. Winds estimated near 115 mph heavily damaged a house under construction off Route OO. There was extensive damage to walls and the roof. A nearby 30-by-40 foot shed was blown away. A 14-foot boat was thrown about one-half mile. Most of the path was over very sparsely populated cropland. Tin and small metal frames were visible in fields off Highway BB, most likely debris from barns and sheds. Small tree limbs were down near tree lines that separated farm fields.

Thunderstorm Wind in MISSISSIPPI, MISSOURI
From 24-APR-10 12:51:00 to 24-APR-10 12:54:00 (CST-6)
Location: CHARLESTON
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

About 20 percent of the metal was blown off a barn roof on Highway 105 south of Charleston. An interstate highway sign supported by two poles was blown down along Interstate 57 at exit 12, which is the U.S. Highway 60 exit.