Severe Thunderstorm Warning 165, NWS Sioux Falls, SD

362 
WWUS53 KFSD 080845
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
345 AM CDT TUE SEP 8 2015

IAC035-149-193-080915-
/O.CON.KFSD.SV.W.0165.000000T0000Z-150908T0915Z/
WOODBURY IA-CHEROKEE IA-PLYMOUTH IA-
345 AM CDT TUE SEP 8 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 AM CDT
FOR NORTH CENTRAL WOODBURY...CHEROKEE AND SOUTHEASTERN PLYMOUTH
COUNTIES...

AT 344 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES NORTHWEST
OF WASHTA...OR 13 MILES SOUTHWEST OF CHEROKEE...MOVING NORTHEAST AT
45 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

THIS SEVERE STORM WILL BE NEAR...
  QUIMBY AROUND 350 AM CDT.
  CLEGHORN AROUND 355 AM CDT.
  CHEROKEE AROUND 405 AM CDT.
  LARRABEE AROUND 410 AM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE MERIDEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4261 9611 4291 9559 4267 9539 4256 9571
      4256 9574 4255 9574 4248 9600
TIME...MOT...LOC 0844Z 236DEG 40KT 4267 9580 

HAIL...<.75IN
WIND...60MPH
 
$$

MJF

433 
WWUS53 KFSD 080859
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
359 AM CDT TUE SEP 8 2015

IAC035-149-193-080909-
/O.CAN.KFSD.SV.W.0165.000000T0000Z-150908T0915Z/
WOODBURY IA-CHEROKEE IA-PLYMOUTH IA-
359 AM CDT TUE SEP 8 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WOODBURY...
CHEROKEE AND SOUTHEASTERN PLYMOUTH COUNTIES IS CANCELLED...
                
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 HAS BEEN CANCELLED.  HOWEVER GUSTY WINDS ARE
STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4261 9611 4291 9559 4267 9539 4256 9571
      4256 9574 4255 9574 4248 9600
TIME...MOT...LOC 0857Z 236DEG 40KT 4275 9563 

$$

MJF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1239 AM CDT TUE SEP 8 2015

.UPDATE...
ISSUED AT 920 PM CDT MON SEP 7 2015

IMPRESSIVE LITTLE SHORTWAVE MOVING THROUGH PORTIONS OF SOUTH
DAKOTA/NEBRASKA LATE THIS EVENING. GENERAL UPTICK IN CONVECTION
HAS TAKEN PLACE AS RIGHT ENTRANCE REGION OF UPR JET STREAK MOVES
BY. INSTABILITY IN THE SOUTHWESTERN THIRD OF THE CWA REMAIN AOA
1500-2000 J/KG...AND EFFECTIVE SHEAR AOA 40 KNOTS WOULD CONTINUE
TO SUPPORT MID-LVL ROTATION AND A RISK OF A COUPLE ELEVATED
HAILERS OVER THE NEXT 1-3 HOURS. RATHER WEAKLY STABILIZED BOUNDARY
LAYER...AND MID-LVL DRY AIR INTRUSION COULD SUPPORT SOME LOCALIZED
WIND THREAT.

LAPSE RATES DO BEGIN TO FALL OFF AS WE REACH MIDNIGHT...EFFECTIVE
SHEAR DECREASES...AND MUCAPE VALUES ALSO FALL...WHICH SHOULD
TEMPER THE SVR RISK INTO EARLY TUESDAY. HOWEVER...WOULD EXPECT A
FURTHER UPTICK IN CONVECTION OVER THE SOUTHERN HALF OF THE FA AS
THIS WAVE MOVES THROUGH. HAVE BUMPED UP POPS FOR MOST AREAS INTO
EARLY TUESDAY.

&&

.SHORT TERM...(THIS EVENING THROUGH TUESDAY)
ISSUED AT 355 PM CDT MON SEP 7 2015

SPOTTY MAINLY HIGH BASED SHOWERS CONTINUE TO STREAM NORTHEAST ACROSS
THE FORECAST AREA AS A MID LEVEL THERMAL BOUNDARY AND MOISTURE
CONVERGENCE SETS UP NEAR THE MISSOURI RIVER. MUCH OF THIS ACTIVITY
IS NOT REACHING THE SURFACE...BUT A FEW LOCATIONS HAVE REPORTED SOME
LIGHT RAINFALL THIS AFTERNOON. THIS SCATTERED SHOWERS ACTIVITY WILL
CONTINUE INTO THE EARLY TO MID EVENING...WITH A LIGHTNING STRIKES
ALSO POSSIBLE.

SHORTWAVE TROUGH CURRENTLY LIFTING INTO SOUTHWEST NEBRASKA WILL BE
THE MAIN FOCUS FOR CONVECTION THIS EVENING AND TONIGHT. THIS WAVE
LIFTS INTO EASTERN NEBRASKA AROUND MIDNIGHT AND ACROSS IOWA AND
SOUTHERN MINNESOTA OVERNIGHT. AN ADDITIONAL ROUND OF SCATTERED
SHOWERS AND STORMS ARE EXPECTED WITH THIS WAVE MAINLY IN NORTHWEST
IOWA AND ADJACENT AREAS. HOWEVER THE HEAVY RAINFALL AND SEVERE
THREAT WILL REMAIN CLOSER TO THE I80 CORRIDOR. LOWS TONIGHT WILL
REACH THE LOWER 50S TO MID 60S.

QUASIZONAL FLOW ON TUESDAY WILL KEEP MOIST AND UNSETTLED CONDITIONS
IN PLACE. A WEAK SHORTWAVE SKIRTS SOUTH CENTRAL SD AND THE MISSOURI
VALLEY THROUGH MIDDAY. COULD SEE A FEW STRAY SHOWERS POP DURING THE
DAY...BUT GENERALLY CLOUDY SKIES IN THE MORNING WILL GRADUALLY
IMPROVE IN THE AFTERNOON. HIGHS WILL BE IN THE 70S.

.LONG TERM...(TUESDAY NIGHT THROUGH MONDAY)
ISSUED AT 355 PM CDT MON SEP 7 2015

FORECAST IS TRANSITIONING TOWARDS A COOLER PATTERN THIS WEEK AS
UPPER LEVEL LOW ACROSS CENTRAL CANADA IS EXPECTED TO MOVE INTO INTO
THE HUDSON BAY REGION.  THIS WILL PLACE THE NORTHERN PLAINS IN A
NORTHWEST FLOW REGIME WITH A SERIES OF FRONTS MOVING THROUGH THIS
WEEK KNOCKING TEMPERATURES BACK INTO THE BELOW NORMAL RANGE TOWARD
THE END OF THE WEEK.

ON TUESDAY NIGHT...SURFACE RIDGE IS EXPECTED TO MOVE ACROSS THE AREA
LEADING TO GOOD RADIATIONAL COOLING. WITH RELATIVELY DRY AIRMASS
ACROSS THE AREA...WILL SEE TEMPERATURES FALL INTO THE UPPER 40S AND
LOWER 50S.

SOUTHWEST FLOW SETS UP ON WEDNESDAY AHEAD OF A COLD FRONT THAT MOVES
THROUGH THE REGION WEDNESDAY NIGHT.  NOT A LOT OF TIME FOR MOISTURE
TO RETURN...THUS ATMOSPHERE IS ONLY WEAKLY UNSTABLE AS THE FRONT
MOVES THROUGH.  HAVE THEREFORE KEPT MENTION OF SHOWERS WITH ISOLATED
THUNDER.

COOLER AIR BEGINS TO FILTER INTO THE REGION ON THURSDAY...BUT WILL
BE MORE NOTICEABLE ON FRIDAY AS NORTHEAST FLOW SETS UP ORIGINATING
FROM THE HUDSON BAY LOW.  925 HPA TEMPS TUMBLE INTO THE MID TO LOWER
TEENS...AND WITH POOR MIXING DIRECTION...WILL BE A STRUGGLE TO CLIMB
OUT OF THE 60S.

TEMPERATURES WILL CONTINUE TO WARM THROUGH THE WEEKEND....AS TROUGH
DEEPENS ACROSS THE EASTERN HALF OF THE US AND RIDGE BUILDS ACROSS
THE WEST.  STILL SOME DISAGREEMENT ON HOW DEEP THE TROUGH WILL BE
ACROSS THE EAST WHICH WILL INFLUENCE HOW QUICKLY THE RIDGE BUILDS
EASTWARD.  FOR NOW...HAVE NUDGED TEMPERATURES UPWARDS ACROSS CENTRAL
SOUTH DAKOTA...BUT LEFT CONSENSUS FURTHER TO THE EAST.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z TUESDAY NIGHT)
ISSUED AT 1239 AM CDT TUE SEP 8 2015 SCATTERED TO NUMEROUS TSRA
ALO9NG AND SOUTH OF INTERSTATE 90 AND IN SOUTHWEST MN WILL
DECREASE FROM WEST TO EAST AND SHOULD END BY 14Z...ENDING LAST IN
NORTHWEST IOWA. ISOLATED -SHRA MAY PERSIST THROUGH 18Z AFTER
THUNDERSTORMS END. AREAS OF CEILINGS 1-3K FEET THROUGH 15Z ALONG
AND SOUTH OF INTERSTATE 90...AND ALSO IN TSRA. AFTER 15Z VFR OVER
AREA THROUGH 09/06Z.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
MN...NONE.
IA...NONE.
NE...NONE.
&&

UPDATE...DUX
SHORT TERM...
LONG TERM...
AVIATION...

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
123 AM CDT TUE SEP 8 2015

MNZ071-072-097-SDZ038>040-050-052>061-063>065-068-090630-
LINCOLN MN-LYON MN-PIPESTONE-BEADLE-KINGSBURY-BROOKINGS-GREGORY-
JERAULD-SANBORN-MINER-LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON-
MCCOOK-CHARLES MIX-DOUGLAS-HUTCHINSON-BON HOMME-
123 AM CDT TUE SEP 8 2015

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

.DAY ONE...REST OF TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

IAZ001>003-012>014-020>022-031-032-MNZ080-081-089-090-098-NEZ013-
014-SDZ062-066-067-069>071-090630-
LYON IA-OSCEOLA-DICKINSON-SIOUX-O'BRIEN-CLAY IA-PLYMOUTH-CHEROKEE-
BUENA VISTA-WOODBURY-IDA-MURRAY-COTTONWOOD-NOBLES-JACKSON-ROCK-
DIXON-DAKOTA-MINNEHAHA-TURNER-LINCOLN SD-YANKTON-CLAY SD-UNION-
123 AM CDT TUE SEP 8 2015

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

.DAY ONE...REST OF TONIGHT

A COMPLEX OF SHOWERS AND THUNDERSTORMS WILL MOVE EASTWARD FOR THE
REMAINDER OF THE NIGHT. THE ENTIRE COMPLEX SHOULD BE EAST OF A
WINDOM MINNESOTA TO STORM LAKE IOWA LINE BY 5 AM CDT AS THE RAIN
ENDS FROM WEST TO EAST. RAINFALL RATES OF ONE TO ONE AND A HALF
INCHES PER HOUR CAN OCCUR IN THE HEAVIEST CELLS...BUT THE STORMS
ARE PROGRESSIVE AND NOT REMAINING OVER ONE LOCATION. THEREFORE THE
FLASH FLOODING THREAT SHOULD BE LIMITED TO THE POOREST DRAINAGE
AREAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1027 PM CDT MON SEP 7 2015

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1025 PM     HAIL             8 NE GREGORY            43.31N 99.31W
09/07/2015  E1.00 INCH       GREGORY            SD   TRAINED SPOTTER

            WIND GUST ESTIMATED TO 50 MPH.

&&

NWS SIOUX FALLS SD
IRIS SYSTEM

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
151 AM CDT TUE SEP 8 2015

SDZ066-067-069>071-080800-
TURNER-LINCOLN SD-YANKTON-CLAY SD-UNION-
INCLUDING THE CITIES OF...PARKER...CENTERVILLE...MARION...
VIBORG...HURLEY...CHANCELLOR...CANTON...LENNOX...TEA...
HARRISBURG...YANKTON...VERMILLION...NORTH SIOUX CITY...
BERESFORD...ELK POINT...ALCESTER...JEFFERSON
151 AM CDT TUE SEP 8 2015

...SPECIAL WEATHER STATEMENT...

JUST BEFORE 2 AM CDT...NATIONAL WEATHER SERVICE RADAR IS SHOWING
THUNDERSTORMS MOVING EASTWARD AT ABOUT 30 MPH IN EXTREME SOUTHEAST
SOUTH DAKOTA. SURFACE OBSERVATIONS ARE SHOWING 40 TO 55 MPH WIND
GUSTS JUST BEHIND THESE STORMS WHICH OCCURRED AT LOCATIONS CLOSE
TO TYNDALL AND TRIPP SOUTH DAKOTA. THEREFORE SOME OF THESE WIND
GUSTS CAN BE EXPECTED BEFORE 245 AM IN EXTREME EASTERN YANKTON
COUNTY...EXTREME SOUTHERN TURNER...EXTREME SOUTHERN LINCOLN...AS
WELL AS CLAY AND UNION COUNTIES IN SOUTH DAKOTA. THESE TRENDS WILL
BE MONITORED FOR STRENGTHENING.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
235 AM CDT TUE SEP 8 2015

IAZ012-020-080845-
SIOUX-PLYMOUTH-
INCLUDING THE CITIES OF...ORANGE CITY...SIOUX CENTER...LE MARS
235 AM CDT TUE SEP 8 2015

...SPECIAL WEATHER STATEMENT...

AT 230 AM...A THUNDERSTORM CELL IS MOVING EASTWARD AT 30 MPH IN
EXTREME SOUTHEAST SOUTH DAKOTA. LOCAL OBSERVATIONS ARE SHOWING
THAT THIS CELL IS PRODUCING 50 TO 55 MPH WIND GUSTS FOR A SHORT
PERIOD OF TIME. THEREFORE SOUTHERN SIOUX AND NORTHERN PLYMOUTH
COUNTIES IN NORTHWEST IOWA CAN EXPECT THIS SORT OF WIND OFF AND ON
THROUGH 315 AM CDT. TRENDS ARE BEING MONITORED VERY CLOSELY FOR
SEVERE WIND POTENTIAL.