One product issued by NWS for:
Hazardous Weather Outlook
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 602 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- 602 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 AN AREA OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO BECOME MORE PREVALENT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE BETWEEN THE JAMES AND INTERSTATE 29 CORRIDOR...AND LIKELY EAST OF INTERSTATE 29...BETWEEN 300 PM AND 900 PM CDT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK. $$