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000
FLUS43 KFSD 191027
HWOFSD

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
526 AM CDT SUN MAY 19 2013

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-201200-
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-
526 AM CDT SUN MAY 19 2013

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

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS...
RAPID DEVELOPMENT OF THUNDERSTORMS IS EXPECTED BY EARLY TO MID
AFTERNOON IN LOCATIONS FROM NORTHEAST NEBRASKA AND FAR SOUTHEAST
SOUTH DAKOTA SOUTHWARD THROUGH EASTERN NEBRASKA. THESE STORMS
WILL MOVE NORTH AND NORTHEAST THROUGH THE AFTERNOON. INITIAL
STORMS WILL BE CAPABLE OF PRODUCING HAIL UP TO GOLF BALL SIZE AND
WIND GUSTS TO 70 MPH...WITH LESSER WIND AND HAIL EXPECTED WITH
STORMS MOVING NORTH OF INTERSTATE 90. WHILE FAIRLY UNLIKELY...AN
ISOLATED TORNADO WILL BE POSSIBLE TOWARD THE LOWER MISSOURI
VALLEY AND EAST THROUGH NORTHWEST IOWA. AN ISOLATED SEVERE STORM
WILL BE POSSIBLE ANYWHERE EAST OF THE JAMES VALLEY LATER THIS
AFTERNOON AND EARLY EVENING...BUT THE GREATEST THREAT WILL OCCUR
BETWEEN 3 PM AND 8 PM SOUTHEAST OF A LINE FROM VERMILLION TO ROCK
RAPIDS TO WINDOM.

FLOODING...
AREAS OF HEAVY RAINFALL LATER THIS AFTERNOON AND EARLY THIS
EVENING COULD LEAD TO A SPOTTY FLASH FLOODING THREAT FOR
NORTHWEST IOWA AND PORTIONS OF SOUTHWEST MINNESOTA NEAR AND EAST
OF HIGHWAY 60. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE
POSSIBLE IN MORE INTENSE THUNDERSTORMS...AND AREAS WHICH HAVE
RECEIVED HEAVY RAINFALL IN THE LAST FEW DAYS WILL BE MORE
SUSCEPTIBLE TO SIGNIFICANT PONDING AND FLASH FLOODING OF SMALLER
STREAMS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

AN ISOLATED THUNDERSTORM ON LATER MONDAY AFTERNOON OR EARLY
MONDAY EVENING COULD PRODUCE MARGINALLY LARGE HAIL EAST OF A
STORM LAKE TO MARSHALL LINE.

SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN DURING THE DAY ON
TUESDAY. HOWEVER...THE ENVIRONMENT ON TUESDAY APPEARS TO BE
FAVORABLE FOR DEVELOPMENT OF QUICK TORNADIC SPIN UPS DURING THE
DEVELOPING PHASE OF SHOWERS AND THUNDERSTORMS ALONG AND EAST OF
INTERSTATE 29. THE MOST LIKELY TIME FOR ANY TORNADIC DEVELOPMENT
WILL BE FROM NOON TO 4 PM AS A AREA OF SHOWERS AND THUNDERSTORMS
IS EXPECTED TO BECOME MORE PREVALENT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE LIKELY BETWEEN 300 PM AND 900 PM EAST
OF THE JAMES VALLEY.

&&

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

$$