Weather System Update

.WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
NOON CST MONDAY…

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A WINTER
WEATHER ADVISORY FOR LIGHT FREEZING RAIN…DRIZZLE…SLEET AND
SNOW…WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO NOON CST
MONDAY.

* TIMING…LIGHT FREEZING RAIN..,.FREEZING DRIZZLE…SLEET AND SNOW
WILL DEVELOP THIS EVENING…THEN GRADUALLY CHANGE OVER TO MAINLY
SNOWFALL MONDAY MORNING. LIGHT SNOW WILL DIMINISH LATE MONDAY
MORNING AND BEGIN MIXING WITH LIGHT RAIN.

* ACCUMULATIONS…UP TO FIVE HUNDREDTHS OF AN INCH OF ICE
ACCUMULATION IS POSSIBLE TONIGHT. STORM TOTAL SNOW ACCUMULATIONS
WILL BE 1 TO 3 INCHES ACROSS THE AREA.

* WIND…SOUTHEASTERLY WINDS OF 15 TO 20 MPH WILL DECREASE TO 10 TO
15 MPH LATE TONIGHT…THEN BECOME LIGHT ON MONDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW…SLEET…OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES…AND USE CAUTION WHILE
DRIVING.

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A mix of light rain, freezing rain, drizzle, sleet and snow will develop this evening across the area. Precipitation will turn to snow overnight in Southwest Minnesota and the Iowa Great Lakes, and will continue through Monday Night. Snow may be moderate to heavy at times in this area, with storm total accumulations around 2 to 6 inches. Elsewhere, the wintry mix tonight with gradually become light snowfall late, then diminish by Monday afternoon. Accumulation will generally be 2 inches or less, with some minor ice accumulations possible. Travel may become hazardous at times on untreated road surfaces.

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

.DAY ONE…TODAY AND TONIGHT

WINTER WEATHER…
LIGHT RAIN WILL MOVE THROUGH AREAS MAINLY NORTH OF INTERSTATE 90
LATE THIS AFTERNOON AND EARLY THIS EVENING. AS TEMPERATURES COOL
THIS EVENING LIGHT RAIN MAY FREEZE ON SURFACES AND COULD CAUSE
SLICK DRIVING CONDITIONS. ADDITIONALLY…LIGHT FREEZING DRIZZLE
MAY ALSO DEVELOP ACROSS THE AREA LATE TONIGHT INTO MONDAY MORNING
ALLOWING SLICK CONDITIONS TO CONTINUE THROUGH THE MORNING. THIS
RAIN SHOULD CHANGE OVER TO SNOW ALONG HIGHWAY 14 INTO SOUTHWEST
MINNESOTA AFTER ABOUT MIDNIGHT WITH 1 TO 3 INCHES POSSIBLE BY
SUNRISE.

.DAYS TWO THROUGH SEVEN…MONDAY THROUGH SATURDAY

THE THREAT FOR ACCUMULATING SNOW WILL CONTINUE MAINLY NORTH AND
EAST OF A HURON TO STORM LAKE LINE. TOTAL SNOWFALL ACCUMULATIONS
OF 3 TO 6 INCHES WILL BE POSSIBLE NORTH AND EAST OF A BROOKINGS
TO SPENCER IOWA LINE WHILE 1 TO 3 INCHES WILL BE POSSIBLE FROM
AROUND HURON THROUGH SIOUX FALLS TO STORM LAKE. SOME LIGHT ICING
WILL CONTINUE TO BE A THREAT ON MONDAY BUT COLDER AIR WILL MOVE
IN WITH THE MAIN THREAT GRADUALLY CHANGING TO SNOW THROUGH THE
EVENING.

MONDAY NIGHT INTO TUESDAY STRONG NORTHWEST WINDS WILL DEVELOP
WITH GUSTS TO AROUND 40 MPH POSSIBLE. THE STRONGEST WINDS SHOULD
OCCUR FROM THE JAMES RIVER VALLEY THROUGH THE MISSOURI RIVER
VALLEY CORRIDOR. SOME BLOWING SNOW WILL BE POSSIBLE ON TUESDAY
OVER MAINLY SOUTHWEST MINNESOTA IF ENOUGH SNOW FALLS.

Updated: March 3, 2013 — 22:48
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