Severe thunderstorms, along with a few supercell thunderstorms, continually developed across the eastern slopes of the Black Hills and moved slowly southeastward onto the southwest South Dakota plains. Very large hail fell across parts of central Pennington County, eastern Custer County, northeastern Fall River County, and Shannon County.

Hail in PENNINGTON, SOUTH DAKOTA
From 17-JUL-03 13:50:00 to 17-JUL-03 13:50:00 (MST)
Location: JOHNSON SIDING
Magnitude: 1.50 
Property damage: 0
Crop damage: 0
Reported by: LAW ENFORCEMENT

Hail in CUSTER, SOUTH DAKOTA
From 17-JUL-03 16:09:00 to 17-JUL-03 16:09:00 (MST)
Location: FAIRBURN
Magnitude: 2.00 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC

Hail in CUSTER, SOUTH DAKOTA
From 17-JUL-03 16:30:00 to 17-JUL-03 16:30:00 (MST)
Location: BUFFALO GAP
Magnitude: 1.75 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC

Hail in OGLALA LAKOTA, SOUTH DAKOTA
From 17-JUL-03 16:45:00 to 17-JUL-03 16:45:00 (MST)
Location: RED SHIRT
Magnitude: 1.75 
Property damage: 0
Crop damage: 0
Reported by: TRAINED SPOTTER

Thunderstorm Wind in FALL RIVER, SOUTH DAKOTA
From 17-JUL-03 16:43:00 to 17-JUL-03 16:43:00 (MST)
Location: ORAL
Magnitude: 52 EG
Property damage: 0
Crop damage: 0
Reported by: TRAINED SPOTTER

Hail in CUSTER, SOUTH DAKOTA
From 17-JUL-03 17:25:00 to 17-JUL-03 17:25:00 (MST)
Location: BLUE BELL
Magnitude: 0.88 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC

Hail in OGLALA LAKOTA, SOUTH DAKOTA
From 17-JUL-03 17:45:00 to 17-JUL-03 17:45:00 (MST)
Location: PORCUPINE
Magnitude: 0.75 
Property damage: 0
Crop damage: 0
Reported by: BROADCAST MEDIA

Hail in BENNETT, SOUTH DAKOTA
From 17-JUL-03 18:00:00 to 17-JUL-03 18:00:00 (MST)
Location: SWETT
Magnitude: 0.88 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC

Hail in FALL RIVER, SOUTH DAKOTA
From 17-JUL-03 16:43:00 to 17-JUL-03 16:43:00 (MST)
Location: ORAL
Magnitude: 3.00 
Property damage: 10K
Crop damage: 0
Reported by: TRAINED SPOTTER

Large tree limbs were blown down. Large hail also broke windows and damaged the roof of a house.

Hail in CUSTER, SOUTH DAKOTA
From 17-JUL-03 16:53:00 to 17-JUL-03 17:00:00 (MST)
Location: CUSTER
Magnitude: 1.25 
Property damage: 0
Crop damage: 0
Reported by: TRAINED SPOTTER

Hail in PENNINGTON, SOUTH DAKOTA
From 17-JUL-03 16:54:00 to 17-JUL-03 16:54:00 (MST)
Location: SHERIDAN LAKE
Magnitude: 1.75 
Property damage: 0
Crop damage: 0
Reported by: NWS EMPLOYEE(OFF DUTY)

Hail in CUSTER, SOUTH DAKOTA
From 17-JUL-03 15:06:00 to 17-JUL-03 15:06:00 (MST)
Location: HERMOSA
Magnitude: 2.50 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC

Hail in CUSTER, SOUTH DAKOTA
From 17-JUL-03 15:20:00 to 17-JUL-03 15:40:00 (MST)
Location: FAIRBURN
Magnitude: 1.50 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC

Hail in PENNINGTON, SOUTH DAKOTA
From 17-JUL-03 14:10:00 to 17-JUL-03 14:10:00 (MST)
Location: PACTOLA RESERVOIR
Magnitude: 1.50 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC

Hail in PENNINGTON, SOUTH DAKOTA
From 17-JUL-03 14:12:00 to 17-JUL-03 14:12:00 (MST)
Location: RAPID CITY
Magnitude: 0.75 
Property damage: 0
Crop damage: 0
Reported by: NWS EMPLOYEE(OFF DUTY)

Hail in PENNINGTON, SOUTH DAKOTA
From 17-JUL-03 14:50:00 to 17-JUL-03 14:50:00 (MST)
Location: KEYSTONE
Magnitude: 1.75 
Property damage: 0
Crop damage: 0
Reported by: TRAINED SPOTTER

Hail in PENNINGTON, SOUTH DAKOTA
From 17-JUL-03 15:04:00 to 17-JUL-03 15:04:00 (MST)
Location: MT RUSHMORE
Magnitude: 1.75 
Property damage: 20K
Crop damage: 0
Reported by: TRAINED SPOTTER

Large hail broke automobile windows.

Hail in CUSTER, SOUTH DAKOTA
From 17-JUL-03 16:00:00 to 17-JUL-03 16:00:00 (MST)
Location: HERMOSA
Magnitude: 1.00 
Property damage: 0
Crop damage: 0
Reported by: GENERAL PUBLIC