A low pressure system deepened rapidly as it moved from southwest Kansas to southwest Missouri to southern Illinois. Strong to severe storms that developed over northern Oklahoma and central Kansas around midnight on the 17th pushed eastward into southeast Kansas and western Missouri by daybreak. Several of these storms produced hail to the size of quarters and wind gusts over 60 mph during the early morning.
After the morning storms dissipated, with the loss of support from the nocturnal low level jet,  residual outflow boundaries and increasing lift from the approaching upper level low led to another round of intense storms that developed over northwest Arkansas and northeast Oklahoma during the mid afternoon and moved northeastward across southwest Missouri through the evening. These storms produced a few tornadoes over Barry and Stone Counties and hail up to 2 inches in diameter.

Hail in LAWRENCE, MISSOURI
From 17-MAR-21 17:16:00 to 17-MAR-21 17:16:00 (CST-6)
Location: MT VERNON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail was reported.

Hail in CHRISTIAN, MISSOURI
From 17-MAR-21 17:58:00 to 17-MAR-21 17:58:00 (CST-6)
Location: NIXA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter sized hail was reported.

Hail in LAWRENCE, MISSOURI
From 17-MAR-21 17:06:00 to 17-MAR-21 17:06:00 (CST-6)
Location: MT VERNON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported via MPing.

Hail in CHRISTIAN, MISSOURI
From 17-MAR-21 17:56:00 to 17-MAR-21 17:56:00 (CST-6)
Location: BOAZ
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported.

Hail in CHRISTIAN, MISSOURI
From 17-MAR-21 18:10:00 to 17-MAR-21 18:10:00 (CST-6)
Location: OZARK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported.

Hail in CHRISTIAN, MISSOURI
From 17-MAR-21 18:10:00 to 17-MAR-21 18:10:00 (CST-6)
Location: OZARK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickle sized hail was reported.

Hail in GREENE, MISSOURI
From 17-MAR-21 18:30:00 to 17-MAR-21 18:30:00 (CST-6)
Location: SPRINGFIELD BAR H AR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Nickle sized hail was reported.

Hail in WEBSTER, MISSOURI
From 17-MAR-21 18:58:00 to 17-MAR-21 18:58:00 (CST-6)
Location: SEYMOUR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in WRIGHT, MISSOURI
From 17-MAR-21 19:35:00 to 17-MAR-21 19:35:00 (CST-6)
Location: LORING
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Nickle sized hail was reported.

Hail in LAWRENCE, MISSOURI
From 17-MAR-21 16:43:00 to 17-MAR-21 16:43:00 (CST-6)
Location: BOWERS MILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported.

Flash Flood in STONE, MISSOURI
From 17-MAR-21 19:15:00 to 18-MAR-21 00:00:00 (CST-6)
Location: JAMESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway U was closed at the Silver Lake Branch where high water made the road impassable.

Flash Flood in HICKORY, MISSOURI
From 17-MAR-21 21:58:00 to 18-MAR-21 02:00:00 (CST-6)
Location: NEMO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Highway D south of Preston was closed at Crane Creek due to flooding.

Flash Flood in HICKORY, MISSOURI
From 17-MAR-21 22:00:00 to 18-MAR-21 04:00:00 (CST-6)
Location: JORDAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Highway P was closed at the low water bridge on the Little Niangua River due to flooding.

Flash Flood in HICKORY, MISSOURI
From 17-MAR-21 22:06:00 to 18-MAR-21 04:00:00 (CST-6)
Location: WHEATLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Highway B in Wheaton was closed due to flooding of a low water area.

Thunderstorm Wind in JASPER, MISSOURI
From 17-MAR-21 05:30:00 to 17-MAR-21 05:30:00 (CST-6)
Location: JASPER
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Minor damage was reported to the roof of a trailer home.

Thunderstorm Wind in LAWRENCE, MISSOURI
From 17-MAR-21 17:06:00 to 17-MAR-21 17:06:00 (CST-6)
Location: HOBERG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Several large trees were reported down.

Thunderstorm Wind in BARRY, MISSOURI
From 17-MAR-21 16:54:00 to 17-MAR-21 16:54:00 (CST-6)
Location: FLAT CREEK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree was reported down across Highway 76 blocking traffic.

Thunderstorm Wind in BARRY, MISSOURI
From 17-MAR-21 17:10:00 to 17-MAR-21 17:10:00 (CST-6)
Location: WIGHTMAN
Magnitude: 50.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Public

Significant damage occurred to a barn and nearby garage. A trampoline was lofted and impaled into the side of a home causing minor damage.

Thunderstorm Wind in STONE, MISSOURI
From 17-MAR-21 17:53:00 to 17-MAR-21 17:53:00 (CST-6)
Location: JAMESVILLE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Winds were estimated at 65 to 70 mph.

Thunderstorm Wind in STONE, MISSOURI
From 17-MAR-21 17:27:00 to 17-MAR-21 17:27:00 (CST-6)
Location: ELSEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Many trees were reported down near the intersection of Highway 413 and Wheeler Branch Road. Some were blocking traffic.

Thunderstorm Wind in STONE, MISSOURI
From 17-MAR-21 17:42:00 to 17-MAR-21 17:42:00 (CST-6)
Location: JAMESVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large trees were reported down blocking Highway U near Lack Branch Road.

Thunderstorm Wind in STONE, MISSOURI
From 17-MAR-21 17:37:00 to 17-MAR-21 17:37:00 (CST-6)
Location: ELSEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees wee reported down blocking Highway 413.

Hail in JASPER, MISSOURI
From 17-MAR-21 05:25:00 to 17-MAR-21 05:25:00 (CST-6)
Location: ORONOGO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Penny sized hail was reported.

Hail in BENTON, MISSOURI
From 17-MAR-21 06:08:00 to 17-MAR-21 06:08:00 (CST-6)
Location: EDMONSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny sized hail was reported via MPing.

Hail in BARTON, MISSOURI
From 17-MAR-21 04:20:00 to 17-MAR-21 04:20:00 (CST-6)
Location: MILFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported.

Hail in BARTON, MISSOURI
From 17-MAR-21 05:28:00 to 17-MAR-21 05:28:00 (CST-6)
Location: LAMAR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny sized hail was reported.

Hail in MCDONALD, MISSOURI
From 17-MAR-21 14:45:00 to 17-MAR-21 14:45:00 (CST-6)
Location: ELK SPGS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Half dollar sized hail was reported.

Hail in MCDONALD, MISSOURI
From 17-MAR-21 14:54:00 to 17-MAR-21 14:54:00 (CST-6)
Location: ANDERSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in MCDONALD, MISSOURI
From 17-MAR-21 14:57:00 to 17-MAR-21 14:57:00 (CST-6)
Location: SPLITLOG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Quarter sized hail was reported.

Hail in MCDONALD, MISSOURI
From 17-MAR-21 14:59:00 to 17-MAR-21 14:59:00 (CST-6)
Location: PINEVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail was reported.

Hail in NEWTON, MISSOURI
From 17-MAR-21 15:23:00 to 17-MAR-21 15:23:00 (CST-6)
Location: BOULDER CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported.

Hail in NEWTON, MISSOURI
From 17-MAR-21 16:05:00 to 17-MAR-21 16:05:00 (CST-6)
Location: STELLA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in BARRY, MISSOURI
From 17-MAR-21 16:21:00 to 17-MAR-21 16:21:00 (CST-6)
Location: CASSVILLE FLDS ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter sized hail was reported.

Hail in BARRY, MISSOURI
From 17-MAR-21 16:30:00 to 17-MAR-21 16:30:00 (CST-6)
Location: EAGLE ROCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Quarter sized hail was reported.

Hail in BARRY, MISSOURI
From 17-MAR-21 16:42:00 to 17-MAR-21 16:42:00 (CST-6)
Location: MONETT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Quarter sized hail was reported.

Hail in CHRISTIAN, MISSOURI
From 17-MAR-21 18:00:00 to 17-MAR-21 18:00:00 (CST-6)
Location: HIGHLANDVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Ping pong ball sized hail was reported in a mostly rural area.

Hail in MCDONALD, MISSOURI
From 17-MAR-21 14:55:00 to 17-MAR-21 14:55:00 (CST-6)
Location: PINEVILLE
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf  ball sized hail was reported. Minor roof and vehicle damage occurred.

Hail in MCDONALD, MISSOURI
From 17-MAR-21 14:58:00 to 17-MAR-21 14:58:00 (CST-6)
Location: ANDERSON
Magnitude: 1.75 
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball sized hail was reported in the down town Anderson area. Several vehicles suffered minor hail damage.

Hail in MCDONALD, MISSOURI
From 17-MAR-21 15:01:00 to 17-MAR-21 15:01:00 (CST-6)
Location: ANDERSON
Magnitude: 2.00 
Property damage: 55.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hen egg size hail was reported in Anderson. Numerous cars suffered hail damage and a few vehicles had significant window damage.

Hail in BARRY, MISSOURI
From 17-MAR-21 16:18:00 to 17-MAR-21 16:18:00 (CST-6)
Location: SELIGMAN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Half dollar sized hail was reported.

Tornado in BARRY, MISSOURI
From 17-MAR-21 16:30:00 to 17-MAR-21 17:19:00 (CST-6)
Location: EAGLE ROCK
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A storm survey determined that a tornado with a maximum of EF-1 strength winds touched down initially five miles northeast of Eagle Rock and continued along an intermittent path of damage 25 miles long as it moved to the northeast. The majority of the damage path, 20 miles, was in Barry County before the tornado crossed into Stone County. Along its path the tornado topped or uprooted several hard and soft wood trees and damaged several outbuildings. The tornado crossed into Stone County along Farm Road 1250. The very rugged terrain precluded a full survey and lead to the intermittent designation.

Tornado in STONE, MISSOURI
From 17-MAR-21 17:19:00 to 17-MAR-21 17:30:00 (CST-6)
Location: ELSEY
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A survey determined that a tornado with maximum strength of EF-1 touched down in Barry county and continued into Stone county. The tornado crossed into Stone County along Farm Road 1250 where a trailer home suffered minor roof damage. Several hard wood trees were uprooted or topped as the tornado moves northeast with some downed trees blocking Highways 413 and FF. The tornado then lifted three miles south of Hurley or just north of Elsey.

Hail in BARRY, MISSOURI
From 17-MAR-21 16:34:00 to 17-MAR-21 16:34:00 (CST-6)
Location: EAGLE ROCK
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Half dollar sized hail was reported.

Hail in BARRY, MISSOURI
From 17-MAR-21 16:36:00 to 17-MAR-21 16:36:00 (CST-6)
Location: EAST PURDY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Half dollar sized hail was reported.

Hail in BARRY, MISSOURI
From 17-MAR-21 16:52:00 to 17-MAR-21 16:52:00 (CST-6)
Location: EAGLE ROCK
Magnitude: 2.00 
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Public

Hen egg sized hail was reported. Some minor vehicle and camper damage occurred in the park.

Hail in LAWRENCE, MISSOURI
From 17-MAR-21 17:04:00 to 17-MAR-21 17:04:00 (CST-6)
Location: MT VERNON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Half dollar sized hail was reported.

Hail in LAWRENCE, MISSOURI
From 17-MAR-21 17:06:00 to 17-MAR-21 17:06:00 (CST-6)
Location: MT VERNON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Golf ball sized hail was reported in a generally rural area south of town.

Hail in BARRY, MISSOURI
From 17-MAR-21 17:27:00 to 17-MAR-21 17:27:00 (CST-6)
Location: SCHOLTEN
Magnitude: 2.00 
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Public

Hen egg sized hail was reported with minor roof and vehicle damage.