Hail, Lyman
- When
- August 13, 3:48 PM CST
- Where
- Lyman County, 3.09 mi ENE of Iona
- Measured
- 0.75 in hail
- Reported by
- Public
- Coordinates
- 43.540, -99.370
Hail in South Dakota, August 13, 2007
A severe thunderstorm brought penny hail to far southeast Lyman county.
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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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 happened
The episode as NWS ABR wrote it up.
A severe thunderstorm brought penny hail to far southeast Lyman county.
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 Aberdeen, SD wrote its last area forecast discussion before the first event at Aug 13, 2:19 PM CST, 1 hour 29 minutes earlier.
Area forecast discussion, Aug 13, 2:19 PM CST, 1 hour 29 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ABERDEEN SD 319 PM CDT MON AUG 13 2007 .SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT THE MAIN FORECAST QUANDARY REMAINS PCPN CHANCES THROUGH THE ENTIRE TIME PERIOD. LOW LEVEL BOUNDARY CONTINUES TO PROGRESS ACROSS THE CWA LATE THIS AFTERNOON. DEWPOINTS HAVE SURGED TOWARD 70 ACROSS MUCH OF THE CWA AHEAD OF THE FRONT. HOWEVER...18Z SOUNDING REVEALED THAT MUCH OF THE CWA REMAINS FIRMLY CAPPED. THUS... DESPITE EXTREME LEVELS OF SFC BASED CAPE AND PRESENCE OF ACCAS FROM NEAR KPIR NORTHEAST TO KETH...WILL KEEP FORECAST DRY OVER MOST OF THE EASTERN CWA. THE OTHER CONCERN FOR TONIGHT IS SOME ENERGY COMING THROUGH THE RIDGE LATE. MODELS HAVE BEEN SOMEWHAT CONSISTENT IN BRINGING LIGHT PCPN TO THE WESTERN AND SOUTHERN PART OF STATE. HAVE DECIDED TO FOLLOW ADJACENT OFFICES AND THROW OUT A SMALL POP. FOR TUESDAY AND TUESDAY NIGHT SFC HIGH CONTINUES TO SINK SOUTH AND BRINGS LOW LEVEL EASTERLY FLOW TO THE CWA...WITH SOME UPSLOPE COMPONENT OVER WESTERN AND SOUTHERN SOUTH DAKOTA JUST TO THE NORTH OF STALLED OUT SURFACE BOUNDARY. THIS BOUNDARY COULD PROVE FAIRLY ACTIVE COME LATE TUESDAY AND TUESDAY NIGHT. MODELS HAVE TRENDED MORE AGGRESSIVE WITH MOISTURE RETURN TUESDAY NIGHT VIA LOW LEVEL JET. GFS PROGS H85 DEWPOINTS APPROACHING +12C AS FAR NORTH AS KMBG. YET...THE LLJ REMAINS MAINLY FOCUSED OVER SOUTHERN SOUTH DAKOTA SO WILL KEEP HIGHEST POPS OVER THIS PART OF THE CWA. HOWEVER...DID BUMP UP THE NORTHERN CWA TO SLIGHT RISK POPS. AS FOR TEMPERATURES...A MIX OF OLD GRIDS AND NEW MOS GUIDANCE WAS USED TO COME UP WITH THE NUMBERS. WENT A BIT UNDER GUIDANCE FOR TUESDAY BASED ON EASTERLY SURFACE FLOW. .LONG TERM...WEDNESDAY THROUGH MONDAY WEDNESDAY STARTS OFF WITH A FRONTAL BOUNDARY LOCATED SOUTH OF THE AREA SO HAVE LEFT FORECAST DRY AT THIS TIME. MAY BE POTENTIAL FOR SLIGHT CHANCE POPS ACROSS THE SOUTHERN CWA BUT WITH THE LOCATION OF THE BOUNDARY INTO NEBRASKA...HAVE OPTED TO KEEP THINGS DRY FOR NOW. FOR THURSDAY INTO FRIDAY...HIGH PRESSURE SLIDES SOUTH OUT OF CANADA AND INTO MN. STUCK WITH THE IDEA THAT HIGH TEMPS WILL PROBABLY LOWER INTO THE 70S ACROSS THE EASTERN CWA BOTH THURSDAY AND FRIDAY AS 850 MB TEMPS DROP INTO THE TEENS. 12Z GFS SHOWING 850 MB TEMPS AS LOW AS 9 C ACROSS TRAVERSE COUNTY BY 18Z FRIDAY. HEADING INTO THE WEEKEND...MODELS HAVE BEEN CONSISTENT IN BRINGING A FAIRLY STRONG WAVE ACROSS SOUTH DAKOTA AND NEBRASKA AREA FRIDAY NIGHT THROUGH SATURDAY AFTERNOON. LEFT CHANCE POPS AROUND 40/50 PERCENT ACROSS THE SOUTHERN AND EASTERN CWA...WHICH MAY NEED TO BE RAISED IN COMING DAYS IF MODELS CONTINUE THEIR DECENT AGREEMENT WITH ONE ANOTHER. && .AVIATION... VFR CONDITIONS EXPECTED AT ALL TAF SITES THROUGH TONIGHT. THE TAF SITES BEING KABR/KATY/KPIR/KMBG. && .ABR WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. && SHORT TERM...TDK LONG TERM...TMT AVIATION...TDK
Hazardous weather outlook, Aug 13, 10:46 AM CST, 5 hours 2 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE ABERDEEN SD 1146 AM CDT MON AUG 13 2007 MNZ039-046-SDZ007-008-011-020>023-141700- TRAVERSE-BIG STONE-MARSHALL-ROBERTS-DAY-CODINGTON-GRANT-HAMLIN- DEUEL- 1146 AM CDT MON AUG 13 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED STORMS MAY EITHER MOVE INTO...OR DEVELOP ACROSS THE REGION THIS AFTERNOON AND EVENING. A FEW SEVERE STORMS ARE POSSIBLE WITH HAIL AND STRONG WINDS THE MAIN THREATS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ISOLATED THUNDERSTORMS ARE POSSIBLE THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY. SDZ003>006-009-010-015>019-033>037-045-048-051-141700- CORSON-CAMPBELL-MCPHERSON-BROWN-WALWORTH-EDMUNDS-DEWEY-POTTER- FAULK-SPINK-CLARK-STANLEY-SULLY-HUGHES-HYDE-HAND-JONES-LYMAN- BUFFALO- 1146 AM CDT MON AUG 13 2007 /1046 AM MDT MON AUG 13 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND NORTHEAST SOUTH DAKOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT HEAT INDICES WILL RISE INTO THE 95 TO 105 DEGREE RANGE THIS AFTERNOON AND EARLY EVENING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ISOLATED THUNDERSTORMS ARE POSSIBLE THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. TDK
The radar
The North Platte radar (KLNX), 202 km away, was scanning. The volume nearest the first event began at 21:47 UTC.
Event by event
1 hail. Local standard time, as filed.
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
- Hail and Damaging Winds in Wisconsin, August 13, 2007
- Heat in Alabama, August 13, 2007
- Lightning Strike in Florida, August 13, 2007
- Damaging Winds in Arizona, August 13, 2007
- Flash Flood and Hail in Minnesota, August 13 to 14, 2007
- Hail and Damaging Wind in North Dakota, August 13, 2007
- Damaging Wind and Lightning Strike in Arizona, August 13, 2007
- Hail and Damaging Winds in Arkansas, August 13, 2007
- Damaging Winds in Georgia, August 13, 2007
- Damaging Winds in Wisconsin, August 13 to 14, 2007
- Hail and Damaging Winds in Tennessee, August 13, 2007
- Tornadoes and Hail in North Dakota, August 13, 2007
More
Every storm in South Dakota in 2007Every state in 2007This day in weather historyWarnings in South Dakota, August 2007
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: 58833.