South Dakota, 2001

Hail in South Dakota, August 20, 2001

August 20, 2001 · NWS UNR · 2 events in 1 county or zone

2 hail, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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.

What forecasters said that day

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 Rapid City, SD wrote its last area forecast discussion before the first event at Aug 20, 1:04 PM MST, 2 hours 42 minutes earlier.

Area forecast discussion, Aug 20, 1:04 PM MST, 2 hours 42 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
205 PM MON AUG 20 2001

LEE TROF STILL LOCATED ALG WY-SD BORDER. TROF IS EXPECTED TO PASS
THRU CWA OVERNIGHT. AS TROF PASSES AND S/W NOW NEAR KRKS MOVES
THRU...EXPECT TSMS NOW SHOWING UP IN ERN WY ON RADAR TO SPREAD E
THRU EVENING HOURS. BEST THETA-E ADV OVR S-CTRL COUNTIES AS WL AS
BEST PVA.  COULD SEE A SEVERE STORM OR TWO...BUT DO NOT EXPECT
WIDESPREAD STORMS. OTHERWISE...PTLY CLDY SKIES WITH GENERALLY LIGHT
WINDS EXPECTED. LOWS SHLD GENERALLY BE IN THE UPR 50S TO MID 60S.
MOS TEMPS LK GD HERE.

TMRW...STRONG NVA OVR NRN TWO-THIRDS OF CWA. SRN AREAS WL HAVE SOME
UPR LVL DIV AND H70 OMEGA. HAVE GONE WITH 20 POPS THERE WITH DRY
ELSEWHERE. TEMPS WL BE SIMILAR TO TDY...MAYBE JUST A TAD COOLER WITH
A WEAK NE WIND. BY TUE NIGHT...ANOTHER WAVE WL PUSH THRU CWA WITH A
LARGER AREA OF COVERAGE THAN TONIGHT. NORTHERN COUNTIES AGAIN HAVE
LOWEST POPS WITH CHC POPS ACROSS SOUTH. SAME WAVE WL REMAIN OVR AREA
INTO WED AFTN WITH A CONTINUED CHC FOR TSMS. ETA MAY BE A LTL FAST
MVG THIS FEATURE THRU CWA GIVEN THE WEAK H50 FLOW. NOT REAL
CONFIDENT WITH THIS WAVE AND HAVE JUST GONE WITH 20 POPS EVERYWHERE.
TEMPS WL BE A BIT COOLER AS H70 TEMPS COOL DOWN TO +8 DEG C.

IN THE EXTENDED...ANOTHER TROF/FRONT TO MOV THRU THU AND BRING A CHC
FOR TSMS TO REGION. WEAK RIDGE MOVES OVR AREA FOR FRI TO KEEP IT DRY
AND SEASONABLE. SAT THRU MON WL HAVE THE RIDGE STRENGTHENING OVER
CTRL US WITH A COUPLE OF WAVES MVG THRU SRN HALF OF CWA IN SW FLOW.

.UNR...NONE.

JMG

The radar

The Rapid City radar (KUDX), 59 km away, was scanning. The volume nearest the first event began at 22:47 UTC.

Open the radar archive at this moment

Event by event

2 hail. Local standard time, as filed.

Hail, Lawrence

When
August 20, 3:46 PM MST to 3:52 PM MST
Where
Lawrence County, 4 mi NW of Nemo
Measured
0.88 in hail
Reported by
TRAINED SPOTTER
Coordinates
44.233, -103.550

Hail, Lawrence

When
August 20, 4:45 PM MST
Where
Lawrence County, 4 mi N of Nemo
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
44.250, -103.500

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in South Dakota in 2001Every state in 2001This day in weather historyWarnings in South Dakota, August 2001

Sources

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 2026-09-24. Each event’s entry at NCEI: 5265943, 5265944.