3:27 PM CDT FRI MAY 17 2013/NWS Des Moines

SATURDAY THROUGH THURSDAY…PERIODS OF THUNDERSTORMS ARE FORECAST SATURDAY NIGHT THROUGH TUESDAY. THERE IS A THREAT FOR SEVERE WEATHER SATURDAY NIGHT THROUGH MONDAY WITH THE MOST SIGNIFICANT POTENTIAL SUNDAY AFTERNOON AND EVENING. VERY LARGE HAIL…DAMAGING WINDS AND A FEW TORNADOES ARE POSSIBLE SUNDAY.

.SPOTTER INFORMATION STATEMENT…

SPOTTER ACTIVATION MAY BE NEEDED SUNDAY AFTERNOON AND EVENING.

The National Weather Service is still cautioning residents about the likelihood of severe storms this weekend. Scattered thunderstorms are possible across northern Iowa today before ending this evening. A few storms may produce locally heavy rainfall. Saturday will be mild and dry with highs in the 80s. Thunderstorm chances return by Saturday night with a few severe storms possible.

The greatest threat for severe weather arrives on Sunday as low pressure lifts into eastern Nebraska and west central Iowa. Severe storms are likely to occur across the state, especially during the afternoon and evening. A few storms may produce very large hail and tornadoes along with a damaging wind threat.

Stay up to date and informed with future forecast regarding the severe weather potential on Sunday! Thunderstorm chances will continue on Monday with a few severe storms possible again.

The Freese-Notis (podcast) weather forecast for Atlantic and the KJAN listening area and weather data for Atlantic….

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(Updated 4:28-a.m.)

Today: Partly sunny, with a high near 83. South wind 6 to 11 mph.
Tonight: Partly cloudy, with a low around 62. South southeast wind 7 to 11 mph.

Saturday: Mostly sunny, with a high near 86. Breezy, with a south southeast wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67. Breezy, with a southeast wind 10 to 17 mph, with gusts as high as 26 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Showers and thunderstorms likely. Mostly cloudy, with a high near 82. Breezy, with a south southeast wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.

Tuesday: Partly sunny, with a high near 70.

MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT COUNTIES….    1128 AM CDT THU MAY 16 2013

THIS AFTERNOON AND TONIGHT…

ISOLATED SEVERE STORMS ARE POSSIBLE DURING THE AFTERNOON AND
POSSIBLY TONIGHT WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY
HAZARDS.

   FRIDAY THROUGH WEDNESDAY…

THERE IS ANOTHER CHANCE FOR THUNDERSTORMS ACROSS THE REGION
SATURDAY NIGHT. THE STRONGEST STORMS LOOK TO BE ON SUNDAY
AFTERNOON AND NIGHT.

POTTAWATTAMIE IA-
1118 AM CDT THU MAY 16 2013

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A SMALL STREAM FLOOD ADVISORY FOR…SOUTHEASTERN POTTAWATTAMIE COUNTY UNTIL 215 PM CDT

* AT 1113 AM CDT…DOPPLER RADAR INDICATED HEAVY RAIN DUE TO
THUNDERSTORMS. THIS WILL CAUSE SMALL STREAM FLOODING IN THE
ADVISORY AREA. UP TO 3 INCHES OF RAIN HAS FALLEN IN THE PAST HOUR.

* MINOR FLOODING WILL REMAIN OVER MAINLY RURAL AREAS OF          SOUTHEASTERN POTTAWATTAMIE COUNTY. THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES…WALNUT CREEK… FARM CREEK…SPRING CREEK…CLARKS BRANCH…INDIAN CREEK…GRAYBILL CREEK…CRABAPPLE CREEK…WEST NISHNABOTNA RIVER…JORDAN CREEK AND EAST NISHNABOTNA RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS…AS WELL AS FARM AND COUNTRY ROADS. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE  POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

The National Weather Service in Des Moines says scattered thunderstorms are possible today over far southern and western Iowa. The focus for thunderstorms will shift to northern Iowa overnight before ending on Friday. Saturday will be mostly sunny and warm ahead of a system that will impact the state Sunday and Monday. Strong to severe thunderstorms are expected to develop Sunday afternoon into Monday. Large hail, damaging winds and even a few tornadoes will be possible with this activity. Wednesday set the Iowa tornado free consecutive day streak with 356 straight days.

The Freese-Notis (podcast) weather forecast for Atlantic & the KJAN listening area, and weather data for Atlantic….

Podcast: Play in new window | Download (1,016.9KB)

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400 AM CDT THU MAY 16 2013

EARLY THIS MORNING…MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF THUNDERSTORMS. EAST WIND AROUND 5 MPH.

TODAY…MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF THUNDERSTORMS. HIGH AROUND 80. SOUTHEAST WIND 5 TO 10 MPH.

TONIGHT...PARTLY CLOUDY WITH A 30 PERCENT CHANCE OF THUNDERSTORMS. LOW AROUND 60. SOUTHEAST WIND 5 TO 10 MPH.

FRIDAY…PARTLY SUNNY. A 20 PERCENT CHANCE OF THUNDERSTORMS IN THE MORNING. HIGH IN THE LOWER 80S. SOUTH WIND 5 TO 15 MPH.

FRIDAY NIGHT AND SATURDAY…PARTLY CLOUDY. BREEZY. LOW IN THE LOWER 60S. HIGH IN THE MID 80S. SOUTHEAST WIND 5 TO 20 MPH.

SATURDAY NIGHT…MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF THUNDERSTORMS. LOW IN THE MID 60S.

SUNDAY AND SUNDAY NIGHT…THUNDERSTORMS LIKELY. HIGH AROUND 80. LOW IN THE LOWER 60S. CHANCE OF THUNDERSTORMS 60 PERCENT.

MONDAY…MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF THUNDERSTORMS. HIGH IN THE MID 70S.