AREA COUNTIES: MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE.   429 AM CDT SUN MAY 11 2014

A MODERATE RISK OF SEVERE STORMS WILL EXIST ACROSS MUCH OF THE REGION TODAY AND TONIGHT.  SEVERE THUNDERSTORMS WILL BE POSSIBLE IN SOUTHEAST NEBRASKA AND A SMALL PORTION OF SOUTHWEST IOWA THIS MORNING. LARGE HAIL UP TO GOLF BALL SIZE AND DAMAGING WINDS COULD OCCUR WITH THE STRONGER STORMS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 AM FOR THIS AREA. THESE STORMS ARE DEVELOPING NORTH OF A WARM FRONT IN RESPONSE TO A STRENGTHENING LOW LEVEL JET AS A LARGE UPPER LEVEL LOW ORGANIZES ACROSS THE SOUTHWESTERN UNITED STATES.

THE NORTHWARD LIFTING WARM FRONT SHOULD BECOME THE FOCUS FOR ADDITIONAL SEVERE STORMS BY NOON AND BEYOND. THE FRONT AT THAT TIME COULD LIFT TO A CRETE NEBRASKA TO RED OAK IOWA LINE. STORMS SHOULD FORM ALONG THE WARM FRONT DURING THE AFTERNOON. SHEAR PROFILES ARE SUFFICIENT FOR ALL MODES OF SEVERE WEATHER INCLUDING VERY LARGE HAIL…DAMAGING WINDS AND TORNADOES.

THE BEST AREA FOR THE SEVERE STORM DEVELOPMENT APPEARS TO BE ABOUT 10 TO 25 MILES EITHER SIDE OF THE WARM FRONT AS IT LIFTS THROUGH AND ALONG THE I80 CORRIDOR BY EARLY AFTERNOON…THEN LIFTING NORTH TOWARD THE PLATTE RIVER VALLEY AND INTO NORTHWEST IOWA LATE IN THE AFTERNOON. A LINE OF SEVERE THUNDERSTORMS SHOULD ALSO DEVELOP SOUTHWESTWARD LATE THIS AFTERNOON FROM A TRIPLE POINT WHICH COULD BE BETWEEN COLUMBUS AND LINCOLN…THEN MOVE EASTWARD ACROSS THE REGION THROUGH THE EVENING.

IN ADDITION TO THE SEVERE WEATHER THREAT…DEEPER MOISTURE RETURNING TO THE REGION…COMBINED WITH STORMS REPEATEDLY TRACKING ACROSS THE SAME LOCATIONS COULD BRING AREAS OF HEAVY RAIN. WHILE 3 HOURLY FLASH FLOOD GUIDANCE VALUES REMAIN FAIRLY HIGH…MULTIPLE STORMS MOVING ACROSS THE SAME AREAS COULD TRIGGER ISOLATED FLASH FLOODING BY LATE AFTERNOON AND EVENING AS WELL.

• Today ** Severe Thunderstorm Watch until 10-a.m. for Fremont, Mills & Pottawattamie Counties** Showers and thunderstorms likely, mainly after 4pm. Some storms could be severe, with large hail, damaging winds, and heavy rain. Mostly cloudy, with a high near 80. Breezy, with an east wind 7 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
• Tonight Showers and thunderstorms. Some of the storms could be severe. Low around 57. Breezy, with a south southeast wind 8 to 17 mph becoming southwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
• Monday A 50 percent chance of showers and thunderstorms. Cloudy, with a temperature falling to around 56 by 10am. Breezy, with a west northwest wind 7 to 16 mph, with gusts as high as 22 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
• Monday Night A 20 percent chance of showers and thunderstorms before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 42. Breezy, with a west northwest wind 11 to 16 mph, with gusts as high as 23 mph.
• Tuesday Mostly sunny, with a high near 61. Breezy, with a west northwest wind 11 to 17 mph, with gusts as high as 25 mph.
• Tuesday Night Partly cloudy, with a low around 42.
• Wednesday A 20 percent chance of showers. Mostly sunny, with a high near 62.

258 AM CDT SUN MAY 11 2014

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 140 IN EFFECT UNTIL 10 AM CDT THIS MORNING FOR THE FOLLOWING AREAS…IN IOWA THIS WATCH INCLUDES 3 COUNTIES:  FREMONT-MILLS-POTTAWATTAMIE.

THIS INCLUDES THE CITIES OF…COUNCIL BLUFFS… FARRAGUT… GLENWOOD… HAMBURG… SIDNEY…and..TABOR.

SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 137

NWS STORM PREDICTION CENTER NORMAN OK 623 PM CDT SAT MAY 10 2014

SEVERE THUNDERSTORM WATCH 137 REMAINS IN EFFECT UNTIL 1000 PM CDT FOR THE FOLLOWING LOCATIONS:

IOWA COUNTIES INCLUDED ARE: ADAMS DECATUR RINGGOLD TAYLOR UNION.

4:21-p.m. 1-inch diameter hail (quarter-size) 3 miles north of Greenfield in Adair County. (Adair County Emergency Management report)

3:37-p.m. 1-inch diameter hail 1 mile northwest of Gravity, in Taylor County. (Trained spotter)

3:22-p.m. Marble-sized hail in Atlantic (.50″) on 17th Street and near Redwood Drive (southeast part of town). Report from Atlantic Fire Chief Mark McNees and KJAN GM Jim Field. Earlier report of pea-sized hail on the south side of town.   (Rainfall at KJAN .09″)

BULLETIN – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
426 PM CDT SAT MAY 10 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…
SOUTH CENTRAL DALLAS COUNTY IN CENTRAL IOWA…
NORTHWESTERN MADISON COUNTY IN SOUTH CENTRAL IOWA…
NORTHEASTERN ADAIR COUNTY IN SOUTHWEST IOWA…

* UNTIL 515 PM CDT

* AT 426 PM CDT…A SEVERE THUNDERSTORM WAS LOCATED NEAR
GREENFIELD…MOVING EAST AT 25 MPH.

HAZARD…60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE…RADAR INDICATED.

IMPACT…HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE
TO ROOFS…SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE…
WINTERSET…GREENFIELD…STUART…EARLHAM…DEXTER…GREENFIELD
MUNICIPAL AIRPORT…WINTERSET-MADISON COUNTY AIRPORT AND NODAWAY
PARK.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 93 AND 108.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE DES MOINES IA

407 PM CDT SAT MAY 10 2014

…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR SOUTHWESTERN GUTHRIE AND NORTHERN ADAIR COUNTIES…

AT 407 PM CDT…A SEVERE THUNDERSTORM WAS LOCATED 7 MILES NORTHWEST OF GREENFIELD…MOVING EAST AT 25 MPH.

HAZARD…60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE…RADAR INDICATED.

IMPACT…HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TOROOFS…SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE…

GREENFIELD…GUTHRIE CENTER…ADAIR…FONTANELLE…CASEY…GREENFIELDMUNICIPAL AIRPORT AND NODAWAY PARK.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 74 AND 87.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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

BUILDING.

BULLETIN – IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE DES MOINES IA

341 PM CDT SAT MAY 10 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR…

EASTERN CASS COUNTY IN SOUTHWEST IOWA…

SOUTHEASTERN AUDUBON COUNTY IN WEST CENTRAL IOWA…

SOUTHWESTERN GUTHRIE COUNTY IN WEST CENTRAL IOWA…

NORTHERN ADAIR COUNTY IN SOUTHWEST IOWA…

* UNTIL 430 PM CDT

* AT 340 PM CDT…A SEVERE THUNDERSTORM WAS LOCATED 10 MILES EAST OF

ATLANTIC…MOVING EAST AT 30 MPH. A SECOND SEVERE THUNDERSTORM WAS

LOCATED BETWEEN CUMBERLAND AND MASSENA MOVING EAST AT 30 MPH.

HAZARD…60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE…RADAR INDICATED.

IMPACT…HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE

TO ROOFS…SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE…

GREENFIELD…GUTHRIE CENTER…ANITA…ADAIR…FONTANELLE…CASEY…

MASSENA…CUMBERLAND…BRIDGEWATER…WIOTA…NODAWAY PARK…LAKE

ANITA STATE PARK…GREENFIELD MUNICIPAL AIRPORT AND ANITA MUNICIPAL

AIRPORT.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 61 AND 87.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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

BUILDING.

CASS IA-ADAIR IA-
312 PM CDT SAT MAY 10 2014

…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR CASS AND WESTERN ADAIR COUNTIES…

AT 312 PM CDT…A SEVERE THUNDERSTORM WAS LOCATED OVER ATLANTIC…
MOVING EAST AT 35 MPH. A SECOND STRONG THUNDERSTORM WAS LOCATED
SOUTHEAST OF GRISWOLD AND MAY CONTAIN PENNY SIZE HAIL.

HAZARD…60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE…RADAR INDICATED.

IMPACT…HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
ROOFS…SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE…
ATLANTIC…GRISWOLD…ANITA…FONTANELLE…LEWIS…MASSENA…
CUMBERLAND…BRIDGEWATER…WIOTA…GRISWOLD PARK…LAKE ANITA STATE
PARK…ATLANTIC MUNICIPAL AIRPORT…ANITA MUNICIPAL AIRPORT AND COLD
SPRINGS STATE PARK.

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 79 AND 82.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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

246 PM CDT SAT MAY 10 2014
**Severe Thunderstorm Watch until 10-p.m. for Adams, Fremont, Mills, Mongtomery, Page, Ringgold Taylor and Union Counties**
LATE THIS AFTERNOON…PARTLY SUNNY WITH SCATTERED THUNDERSTORMS. BREEZY. SOUTH WIND 15 TO 20 MPH. CHANCE OF THUNDERSTORMS 40 PERCENT.

TONIGHT…MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY BEFORE MIDNIGHT AND EARLY MORNING THEN BECOMING MOSTLY CLOUDY. SCATTERED THUNDERSTORMS IN THE EVENING…THEN ISOLATED THUNDERSTORMS BEFORE MIDNIGHT. SCATTERED THUNDERSTORMS EARLY IN THE MORNING. LOW IN THE MID 50S. SOUTHEAST WIND NEAR 10 MPH. CHANCE OF THUNDERSTORMS 50 PERCENT.

SUNDAY…THUNDERSTORMS UNTIL LATE AFTERNOON…THEN THUNDERSTORMS LIKELY LATE IN THE AFTERNOON. BREEZY. SOME THUNDERSTORMS MAY BE SEVERE WITH HEAVY RAINFALL LATE IN THE AFTERNOON. HIGH IN THE UPPER 70S. SOUTHEAST WIND 10 TO 20 MPH. CHANCE OF THUNDERSTORMS 80 PERCENT.

SUNDAY NIGHT…THUNDERSTORMS. SOME THUNDERSTORMS MAY BE SEVERE WITH HEAVY RAINFALL…THEN SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL AFTER MIDNIGHT. LOW IN THE UPPER 50S. NORTHEAST WIND 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT. CHANCE OF THUNDERSTORMS NEAR 100 PERCENT.

MONDAY…SHOWERS LIKELY AND ISOLATED THUNDERSTORMS. COOLER. HIGH IN THE MID 60S. NORTHWEST WIND NEAR 10 MPH INCREASING TO 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH IN THE AFTERNOON. CHANCE OF PRECIPITATION 60 PERCENT.

MONDAY NIGHT…MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS THROUGH MIDNIGHT…THEN PARTLY CLOUDY AFTER MIDNIGHT. COLDER. LOW IN THE LOWER 40S. NORTHWEST WIND 5 TO 15 MPH. CHANCE OF PRECIPITATION 20 PERCENT.

TUESDAY AND TUESDAY NIGHT…PARTLY CLOUDY. BREEZY. HIGH IN THE UPPER 50S. LOW IN THE LOWER 40S.