A landspout was observed and photographed near Mayfield in Yankton County in southeast South Dakota on the afternoon of May 8th. No damage was reported.
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The episode as NWS FSD wrote it up.
A landspout was observed and photographed near Mayfield in Yankton County in southeast South Dakota on the afternoon of May 8th. No damage was reported.
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 Sioux Falls, SD wrote its last area forecast discussion before the first event at May 8, 2:26 PM CST, 1 hour 34 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 326 PM CDT WED MAY 8 2013 .SHORT TERM...(THIS EVENING THROUGH THURSDAY) ISSUED AT 325 PM CDT WED MAY 8 2013 AS OF 20Z...THE UPPER LEVEL LOW CONTINUES TO ROTATE NEAR KMHE. THIS SYSTEM IS EXPECTED TO MAKE A SLOW PROGRESSION TO THE EAST...AND WITH THE LOSS OF DIURNAL HEATING...SHOWER ACTIVITY SHOULD GRADUALLY WANE THROUGH THE EVENING. UPPER LEVEL SUPPORT LINGERS EAST OF I-29 THROUGH THE OVERNIGHT AND HAVE LEFT SOME LOW CHANCE POPS ESPECIALLY ACROSS SOUTHWEST MINNESOTA INTO NORTHWEST IOWA. FORECAST SOUNDINGS SUGGEST A FAIR AMOUNT OF LOW LEVEL SATURATION...SO COULD SEE THE POTENTIAL FOR DRIZZLE AND FOG...THOUGH THINK FAIRLY EXTENSIVE CLOUD COVER WILL HELP KEEP TEMPERATURES UP. HAVE RAISED FORECAST LOWS SLIGHTLY...AND LEFT MENTION OF FOG OUT OF THE FORECAST FOR NOW. ON THURSDAY...MODEL SOUNDINGS SUGGEST THE POTENTIAL FOR SHOWERS REDEVELOPING ACROSS THE AREA WITH DAYTIME HEATING ESPECIALLY EAST OF A LINE FROM TYNDALL SD TO MARSHALL MN. ON THE BACK SIDE OF THE UPPER LOW...EXPECT BREEZY NORTH WINDS TO DEVELOP ACROSS THE AREA WHICH WILL GRADUALLY SUBSIDE THURSDAY EVENING. WITH 900 MB TEMPS FALLING INTO THE UPPER SINGLE DIGITS...HIGH TEMPERATURES ARE EXPECTED TO REMAIN BELOW NORMAL IN THE LOWER 60S. .LONG TERM...(THURSDAY NIGHT THROUGH WEDNESDAY) ISSUED AT 325 PM CDT WED MAY 8 2013 ANY LINGERING SHOWERS AND THUNDERSTORMS OVER FAR SOUTHEAST CWA SHOULD END EARLY THURSDAY EVENING AS THE SHORT WAVE MOVES OFF TOWARDS THE GREAT LAKES REGION. SURFACE HIGH WILL SETTLE OVER THE CWA LATER THURSDAY NIGHT AND FRIDAY WHICH SHOULD HELP TO CLEAR SKIES OUT. WARMER AIR ALOFT WILL SPREAD EAST ACROSS THE CWA ON FRIDAY WITH THE WARMEST TEMPERATURES ACROSS THE WEST. HIGHS ON FRIDAY WILL BE NEAR NORMAL OR SLIGHTLY BELOW ACROSS THE EAST AND A FEW DEGREES ABOVE NORMAL WEST. THE WARMING WILL BE OF SHORT DURATION AS A FAIRLY STRONG COLD FRONT WILL DROP SOUTH ACROSS CWA FRIDAY NIGHT. A FEW SHOWERS WILL BE POSSIBLE ALONG AND JUST BEHIND THE FRONT FRIDAY NIGHT...WITH MOSTLY SUNNY...WINDY AND COLDER CONDITIONS ON SATURDAY. HIGHS ON SATURDAY WILL BE A GOOD 10 TO 15 DEGREES BELOW NORMAL WITH HIGHS ON IN THE 50S. ADD IN NORTH WINDS OF 15 TO 30 MPH...AND IT WILL FEEL COLDER. COOL HIGH PRESSURE WILL SETTLE OVER CWA SATURDAY NIGHT AND SUNDAY WITH THE POTENTIAL FOR AT LEAST PATCHY FROST. OVERNIGHT LOWS WILL DROP INTO THE 30S. LIGHTER WINDS ON SUNDAY BUT WILL STILL REMAIN RELATIVELY COOL ESPECIALLY OVER THE EAST. STRONG WARM AIR ADVECTION BOTH MONDAY AND TUESDAY AHEAD OF NEXT COLD FRONT. WILL SEE HIGHS IN THE 70S AND 80S...WITH THE WARMEST DAY BEING TUESDAY. COLD FRONT WILL DROP THROUGH CWA TUESDAY AFTERNOON AND NIGHT. NOT EXPECTING ANY THUNDERSTORMS AHEAD OF THE FRONT...BUT COULD SEE A FEW LATER TUESDAY NIGHT AND WEDNESDAY AS FRONT STALLS SOUTH OF CWA WITH WEAK WAVES MOVING EAST ACROSS THE NORTHERN PLAINS. SO WILL KEEP 20% CHANCE OF THUNDERSTORMS FOR TUESDAY NIGHT AND WEDNESDAY. TEMPERATURES WILL NOT BE MUCH COOLER ON WEDNESDAY AS AIR BEHIND THE FRONT WILL BE MODIFIED PACIFIC AIR && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z THURSDAY AFTERNOON) ISSUED AT 108 PM CDT WED MAY 8 2013 UPPER LEVEL LOW CONTINUES TO SPIN ACROSS THE AREA. CONFIDENCE IN TIMING OF SCATTERED SHOWERS...AND TEMPOPRARY REDUCTIONS TO MVFR AND IFR CEILINGS CAN BE EXPECTED THROUGH THE AFTERNOON. MOST WIDESPREAD RAIN WILL BE MAINLY EAST OF I-29 THIS AFTERNOON INTO THIS EVENING....BEFORE GRADUALLY SHIFTING EAST OVERNIGHT. LEFT MENTION IN OF FOG OVERNIGHT...BUT CONFIDENCE IS LOW. WITH MINIMAL SURFACE HEATING ON THURSDAY...APPEAR THAT TALL CUMULUS IF NOT ADDITIONAL SHOWERS ARE POSSIBLE ON THURSDAY. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM... LONG TERM... AVIATION...
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 856 AM CDT WED MAY 08 2013 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-091200- AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA- CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE- DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON- IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN- LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN- OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN- SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON- 856 AM CDT WED MAY 08 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... SHOWERS AND ISOLATED THUNDERSTORMS...MAINLY EAST OF THE JAMES RIVER...WILL CONTINUE THROUGH THE DAY TODAY...WITH COVERAGE DECREASING TONIGHT. NO SEVERE WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A FEW SHOWERS AND THUNDERSTORMS MAY DEVELOP ANYTIME FROM LATE THURSDAY MORNING INTO THE AFTERNOON...MAINLY SOUTHEAST OF A WINDOM TO SIOUX FALLS TO YANKTON LINE. THIS ACTIVITY IS NOT EXPECTED TO BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
The Sioux Falls radar (KFSD), 74 km away, was scanning. The volume nearest the first event began at 22:00 UTC.
1 tornado. Local standard time, as filed.
A brief landspout caused no reported damage. The tornado was recorded with video equipment.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2013Every state in 2013This day in weather historyThe tornado archive for South Dakota, 2013Warnings in South Dakota, May 2013
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: 451149.