Severe Thunderstorm Warning 159, NWS Sioux Falls, SD

509 
WWUS53 KFSD 222144
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
444 PM CDT SAT AUG 22 2015

IAC193-222153-
/O.CAN.KFSD.SV.W.0159.000000T0000Z-150822T2200Z/
WOODBURY IA-
444 PM CDT SAT AUG 22 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WOODBURY COUNTY
IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR WEST CENTRAL
IOWA.

LAT...LON 4233 9561 4236 9532 4221 9533 4221 9561
TIME...MOT...LOC 2143Z 262DEG 21KT 4226 9549 

$$

IAC093-222200-
/O.CON.KFSD.SV.W.0159.000000T0000Z-150822T2200Z/
IDA IA-
444 PM CDT SAT AUG 22 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHEASTERN IDA COUNTY...

AT 443 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR IDA GROVE...
MOVING EAST AT 25 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

THIS SEVERE STORM WILL BE NEAR...
  ARTHUR AROUND 500 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR WEST CENTRAL
IOWA.

LAT...LON 4233 9561 4236 9532 4221 9533 4221 9561
TIME...MOT...LOC 2143Z 262DEG 21KT 4226 9549 

HAIL...1.00IN
WIND...60MPH
 
$$

MJF

596 
WWUS53 KFSD 222153
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
453 PM CDT SAT AUG 22 2015

IAC093-222202-
/O.EXP.KFSD.SV.W.0159.000000T0000Z-150822T2200Z/
IDA IA-
453 PM CDT SAT AUG 22 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN IDA COUNTY WILL
EXPIRE AT 500 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR WEST CENTRAL
IOWA.

LAT...LON 4233 9561 4236 9532 4221 9533 4221 9561
TIME...MOT...LOC 2150Z 268DEG 26KT 4226 9549 

$$

MJF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
248 PM CDT SAT AUG 22 2015

.SHORT TERM...(THIS EVENING THROUGH SUNDAY)
ISSUED AT 248 PM CDT SAT AUG 22 2015

COLD FRONT IS SCREAMING THROUGH THE FORECAST AREA AT THIS TIME.
CLOUDS HAVE REMAIN ENTRENCHED BOTH BEHIND AND AHEAD OF THE WIND
SHIFT. AND ALTHOUGH MOISTURE ADVECTION HAS ALLOWED FOR SOME DECENT
WARMING AHEAD OF THE FRONT...OVERALL THE ATMOSPHERE REMAINS CAPPED.
WILL HAVE TO WAIT FOR THE WIND SHIFT TO INTERACT WITH THE MAX
HEATING OF THE DAY TIMED WITH THE UPPER AIR DYNAMICS. THIS POINTS TO
THE PRIMARY SEVERE THREAT ALONG AND EAST OF A MARSHALL TO SIOUX CITY
LINE...WITH CHANCES INCREASING EAST OF THAT LINE AS THE AFTERNOON
PROGRESSES. THAT SAID...DUE TO THE RAPID TIMING OF THE WIND SHIFT...
CONVECTIVE ACTIVITY WILL LIKELY BE EAST OF OUR SOUTHEAST ZONES
BETWEEN 7 AND 8 PM THIS EVENING. TORNADIC THREAT IS
THERE...BUT MODEST IN OUR FORECAST AREA WITH 0-1KM HELICITY VALUES
FAVORING ANY THREAT FOR THAT ACTIVITY IN OUR FAR EASTERN
ZONES...WITH VALUES OF 100 TO 200. OTHERWISE THE MAIN SEVERE THREAT
IS LIKELY STRAIGHT LINE WINDS OF 60 TO 70 MPH.

WIND WISE...JUST EXPANDED THE WIND ADVISORY ONE TO TWO ROWS OF
COUNTIES EASTWARD INTO MID EVENING. THIS IS BASED ON UPSTREAM
OBSERVATIONS AND WINDS IN THE MIXED LAYER OF 30 TO 40 KNOTS. BUT AS
YOU HEAD FURTHER EAST...THE WINDS ARE FORECAST TO BECOME RELATIVELY
LIGHTER AS THE LATE AFTERNOON AND EVENING PROGRESS...COUPLED WITH A
PRESSURE GRADIENT THAT IS NOT ALL THAT OUTSTANDING. STILL...THE
PRESSURE RISES OF 4 TO 5MB IN THREE HOURS ARE FAIRLY STRONG THIS
EVENING EAST OF THE ADVISORY AREA...COUPLED WITH STRONG COLD AIR
ADVECTION. SO WIND ADVISORY OR NOT...IT WILL BE WINDY. A SECOND
SURGE OF WEAK COLD AIR ADVECTION FILTERS DOWN LATE TONIGHT INTO OUR
NORTHERN ZONES. THIS WILL KEEP THE WINDS STIRRED UP FOR THOSE AREAS
AND BRING SOME STRATOCU CLOUDS DOWN INTO THE FORECAST AREA. MIXED
LAYER WINDS STRONG SUGGEST WINDS BELOW ADVISORY CRITERIA HOWEVER.
NORTHWEST WINDS WILL BE QUITE BREEZY ON SUNDAY UNDER SUNNY SKIES.
LOWS TONIGHT WILL PRIMARILY BE IN THE 50 TO 55 DEGREE
RANGE...FOLLOWED BY WELL BELOW NORMAL TEMPERATURES OF MID 60S TO MID
70S ON SUNDAY.

.LONG TERM...(SUNDAY NIGHT THROUGH SATURDAY)
ISSUED AT 248 PM CDT SAT AUG 22 2015

THE REMAINDER OF THE SHORT-TERM...SUNDAY THROUGH TUESDAY LOOKS
TRANQUIL. A RIDGE OF HIGH PRESSURE WILL MOVE OVER CENTRAL SOUTH
DAKOTA ON SUNDAY NIGHT AND SLOWLY MOVE TO THE I-29 CORRIDOR BY
TUESDAY MORNING. FOR SUNDAY NIGHT AND MONDAY NIGHT...THIS WILL MEAN
CLEAR SKIES...LIGHT WINDS AND COOL TEMPERATURES BOTH NIGHTS.  WHILE
WE CANNOT COMPLETELY RULE OUT FOG EITHER NIGHT IN RIVER
VALLEYS...THE RELATIVELY WELL MIXED ATMOSPHERE BOTH DAYS SHOULD MIX
OUT ANY SURFACE MOISTURE SO THAT ANY MOISTURE OVERNIGHT WILL BE
RATHER SHALLOW AND MOST LIKELY TO PRODUCE DEW RATHER THAN FOG.
OTHERWISE...ON MONDAY EXPECT THAT AREAS EAST OF I29 WILL SEE WINDS
INCREASE TO 10 TO 20 MPH DURING THE AFTERNOON AS ATMOSPHERE MIXES TO
ABOVE 900 MB WHILE LIGHT WINDS EXPECTED EAST OF I29. WINDS SHOULD BE
LIGHT ACROSS MUCH OF THE AREA ON TUESDAY. HIGHS BOTH MONDAY AND
TUESDAY WILL BE BELOW NORMAL...GENERALLY FROM 70 TO 80.

WITH EXPECTED SEVERE WEATHER THIS AFTERNOON...DID NOT MAKE
SIGNIFICANT CHANGES TO EXTENDED. EXPECT TEMPERATURES TO GRADUALLY
WARM TOWARD NORMAL BY THE END OF THE WEEK. THE NEXT CHANCE OF
STORMS LOOKS TO BE FROM THURSDAY NIGHT THROUGH FRIDAY NIGHT.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY AFTERNOON)
ISSUED AT 1232 PM CDT SAT AUG 22 2015

LEADING EDGE OF VIGOROUS COLD FRONT FOR THIS TIME OF YEAR AND
ASSOCIATED STRONG WIND SHIFT IS CLOSE TO A KHON TO KMHE LINE. THE
WIND SHIFT IS A BIT FASTER THAN MOST OF THE SHORT RANGE MODELS ARE
SHOWING SO ACCOUNTED FOR THIS. AT ANY RATE...THE NORTHWEST WINDS
BEHIND THE WIND SHIFT WILL BE QUITE STRONG THIS AFTERNOON AND
EARLY EVENING...WITH A BIT OF A SECOND SURGE OF WIND COMING DOWN
AFTER MIDNIGHT AFFECTING THE KHON AND KFSD TAF SITES. THIS
AFTERNOON AND EARLY EVENING...ONE CAN EXPECT FREQUENT GUSTS OF 30
TO 35 KNOTS AT KHON...KFSD AND KSUX ONCE YOU ARE BEHIND THE WIND
SHIFT. THEN LATE TONIGHT AT KHON AND KFSD...NORTHWEST WINDS WILL
ALSO LIKELY GUST FOR A SHORT PERIOD OF TIME IN THAT RANGE. TSRA IS
A GOOD BET LOOKING INTO OUR EASTERN ZONES LATE THIS AFTERNOON AND
VERY EARLY EVENING. KSUX WILL BE ON THE EDGE OF THIS ACTIVITY AND
BEST TIMING OF TSRA FOR THEM WILL BE AROUND 4 TO 5 PM. UPPER END
MVFR TO VFR WILL PREVAIL THIS AFTERNOON ACROSS THE FORECAST AREA.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...WIND ADVISORY UNTIL 9 PM CDT THIS EVENING FOR SDZ038-039-050-
     052>055-057>061-063>066-068>070.

MN...NONE.
IA...NONE.
NE...NONE.
&&

SHORT TERM...MJ
LONG TERM...SCHUMACHER
AVIATION...MJ

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
459 AM CDT SAT AUG 22 2015

IAZ001>003-012>014-020>022-031-032-MNZ072-080-081-089-090-098-
NEZ013-014-SDZ071-231000-
LYON IA-OSCEOLA-DICKINSON-SIOUX-O'BRIEN-CLAY IA-PLYMOUTH-CHEROKEE-
BUENA VISTA-WOODBURY-IDA-LYON MN-MURRAY-COTTONWOOD-NOBLES-JACKSON-
ROCK-DIXON-DAKOTA-UNION-
459 AM CDT SAT AUG 22 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
IOWA...SOUTHWEST MINNESOTA...NORTHEAST NEBRASKA AND SOUTHEAST
SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS SHOULD BE INITIALLY ISOLATED BY MID AFTERNOON
ALONG A LINE FROM MARSHALL TO VERMILLION...BUT QUICKLY BECOME
MORE WIDESPREAD THROUGH THE LATE AFTERNOON PUSHING THROUGH
SOUTHWEST MINNESOTA AND NORTHWEST IOWA. LARGE HAIL UP TO TWO
INCHES IN DIAMETER WILL BE POSSIBLE...ALONG WITH WIND GUSTS
TO 70 MPH. A FEW TORNADOES WILL ALSO BE POSSIBLE...ESPECIALLY
ALONG AND EAST OF A SLAYTON TO SIOUX CITY LINE.

SPOTTY HEAVIER RAINFALL RATES OF 1 TO 2 INCHES PER HOUR ARE
EXPECTED WHICH COULD RESULT IN LOCALIZED PONDING ACROSS AREAS EAST
OF A WINDOM TO SIOUX CITY LINE LATE THIS AFTERNOON. HOWEVER...NO
WIDESPREAD FLASH FLOOD THREAT IS EXPECTED.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED BETWEEN 3 PM AND 8 PM.

MNZ071-097-SDZ040-056-062-066-067-069-070-231000-
LINCOLN MN-PIPESTONE-BROOKINGS-MOODY-MINNEHAHA-TURNER-LINCOLN SD-
YANKTON-CLAY SD-
459 AM CDT SAT AUG 22 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
MINNESOTA...EAST CENTRAL SOUTH DAKOTA AND SOUTHEAST SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

MID TO LATE AFTERNOON...THERE WILL BE A CHANCE FOR ISOLATED
THUNDERSTORMS.  IF ANY STORMS DO DEVELOP...THEY COULD QUICKLY
BECOME SEVERE AND PRODUCE HAIL UP TO PING PONG BALL SIZE AND WIND
GUSTS TO 65 MPH.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE BETWEEN 2 PM AND 5 PM.

SDZ039-054-055-060-061-065-068-231000-
KINGSBURY-MINER-LAKE-HANSON-MCCOOK-HUTCHINSON-BON HOMME-
459 AM CDT SAT AUG 22 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
SOUTH DAKOTA AND SOUTHEAST SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

SDZ038-050-052-053-057>059-063-064-231000-
BEADLE-GREGORY-JERAULD-SANBORN-BRULE-AURORA-DAVISON-CHARLES MIX-
DOUGLAS-
459 AM CDT SAT AUG 22 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
SOUTH DAKOTA...SOUTH CENTRAL SOUTH DAKOTA AND SOUTHEAST SOUTH
DAKOTA.

.DAY ONE...TODAY AND TONIGHT

NORTHWEST WINDS WILL INCREASE TO A GUSTY 30 TO 45 MPH THIS
AFTERNOON. STRONG WINDS ARE EXPECTED TO LINGER THROUGH EARLY
EVENING BEFORE DIMINISHING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.