701 PM CDT SUN AUG 31 2014

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A SEVERE THUNDERSTORM WARNING FOR…NORTHWESTERN POTTAWATTAMIE COUNTY IN SOUTHWEST IOWA…SOUTHERN HARRISON COUNTY IN SOUTHWEST IOWA…SOUTHEASTERN WASHINGTON COUNTY IN EAST CENTRAL NEBRASKA… UNTIL 745 PM CDT

* AT 700 PM CDT…A SEVERE THUNDERSTORM WAS LOCATED OVER FORT CALHOUN…OR 15 MILES NORTH OF OMAHA…MOVING EAST AT 30 MPH.

HAZARD…60 MPH WIND GUSTS.

SOURCE…RADAR INDICATED.

IMPACT…EXPECT DAMAGE TO ROOFS…SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE…

BLAIR…MISSOURI VALLEY…LOGAN…FORT CALHOUN…NEOLA…DESOTO BEND NATIONAL WILDLIFE REFUGE…HISTORICAL VILLAGE WELCOME CENTER…WILSON ISLAND STATE PARK…ARROWHEAD PARK AND HITCHCOCK NATURE CENTER.

THIS INCLUDES THE FOLLOWING HIGHWAYS…

HIGHWAY 30 IN IOWA BETWEEN MILE MARKERS 1 AND 5. HIGHWAY 30 IN NEBRASKA NEAR MILE MARKER 450. HIGHWAY 75 IN NEBRASKA BETWEEN MILE MARKERS 102 AND 111. INTERSTATE 29 BETWEEN MILE MARKERS 66 AND 79. INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 20 AND 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR

SOUTHWEST IOWA AND EASTERN NEBRASKA.

HARRISON IA-POTTAWATTAMIE IA-WASHINGTON NE-

657 PM CDT SUN AUG 31 2014

SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN POTTAWATTAMIE…SOUTHERN HARRISON AND SOUTHEASTERN WASHINGTON COUNTIES UNTIL 745 PMCDT…

AT 657 PM CDT…DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR FORT CALHOUN…OR 16 MILES NORTH OF OMAHA…MOVING EAST AT 30 MPH. WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE…

BLAIR…MISSOURI VALLEY…LOGAN…FORT CALHOUN…PERSIA…MODALE…

DESOTO BEND NATIONAL WILDLIFE REFUGE…HISTORICAL VILLAGE WELCOME

CENTER AND WILSON ISLAND STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM…AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. THIS STORM MAY INTENSIFY…SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS…AS WELL AS LOCAL CABLE TV OUTLETS…FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

654 PM CDT SUN AUG 31 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING FOR…CRAWFORD COUNTY IN WEST CENTRAL IOWA…WESTERN CARROLL COUNTY IN WEST CENTRAL IOWA…* UNTIL 1245 AM CDT

* AT 652 PM CDT…DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. LAW ENFORCEMENT HAS REPORTED THAT WATER IS OVER HIGHWAY 141 BETWEEN DENISON AND CHARTER OAK. RAINFALL AMOUNTS NEAR 2 INCHES HAVE OCCURRED WITH AN ADDITIONAL ONE TO TWO INCHES POSSIBLE IN CRAWFORD COUNTY. THIS ACTIVITY WILL SPREAD EAST INTO CARROLL COUNTY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE… CARROLL…DENISON…MANNING…SCHLESWIG…MANILLA…DOW CITY…CHARTER OAK…ARCADIA…BREDA…VAIL…TEMPLETON…WESTSIDE…KIRON…DEDHAM…DELOIT…HALBUR…RICKETTS…ARION…BUCK GROVEAND ASPINWALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. TURN AROUND…DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES.

MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-
PAGE COUNTIES IN IA; KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-BUTLER-
SAUNDERS-DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE-JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON COUNTIES IN NE….
410 PM CDT SUN AUG 31 2014

TONIGHT AND MONDAY…

THUNDERSTORM COVERAGE AND STRENGTH WILL INCREASE ACROSS THE AREA LATE THIS AFTERNOON INTO THIS EVENING. SEVERE THUNDERSTORMS ARE LIKELY WITH ISOLATED TORNADOES POSSIBLE THROUGH 700 PM. THE PRIMARY HAZARDS WITH MOST STORMS WILL BE LARGE HAIL AND DAMAGING WINDS AS STORMS CONSOLIDATE INTO A LINE CONFIGURATION BY EARLY THIS EVENING.

MINOR FLOODING SHOULD CONTINUE ALONG SOME SMALL STREAMS IN SOUTHEAST NEBRASKA. THAT FLOODING MAY BE AGGRAVATED OR NEW FLOODING COULD DEVELOP TONIGHT DUE TO LOCALLY HEAVY RAIN.

THE THUNDERSTORMS ARE THE RESULT OF A COLD FRONT PUSHING INTO EASTERN NEBRASKA LATE THIS AFTERNOON.

MONDAY NIGHT THROUGH SUNDAY…

THERE IS A CHANCE FOR THUNDERSTORMS MONDAY NIGHT FOR NORTHERN PARTS OF THE AREA AND FOR THE SOUTH TUESDAY NIGHT. MORE WIDESPREAD STORMS ARE POSSIBLE THURSDAY NIGHT INTO FRIDAY AS ANOTHER COLD FRONT MOVES THROUGH THE REGION.

.SPOTTER INFORMATION STATEMENT…

STORM SPOTTERS WILL BE NEEDED DURING THE LATE AFTERNOON AND THIS EVENING.

CRAWFORD-CARROLL-GREENE-BOONE-STORY-AUDUBON-GUTHRIE-DALLAS-CASS-
ADAIR-MADISON-WARREN-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD-DECATUR-
407 PM CDT SUN AUG 31 2014

THIS AFTERNOON AND TONIGHT…A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA. THUNDERSTORMS ARE EXPECTED THIS EVENING ACROSS THE AREA. THE PRIMARY SEVERE THREATS ARE LARGE HAIL AND HIGH WINDS…WITH AN ISOLATED TORNADO POSSIBLE. HEAVY RAINFALL IS POSSIBLE WITH SOME STORMS PRODUCING RAINFALL TOTALS OF 1 TO 3 INCHES.

MONDAY THROUGH SATURDAY…

THUNDERSTORMS WILL LINGER INTO MONDAY MORNING. ADDITIONAL ROUNDS OF THUNDERSTORMS ARE EXPECTED LATE TUESDAY NIGHT THROUGH FRIDAY. THE PROBABILITY OF SEVERE WEATHER IS LOW…WITH THE BEST CHANCE FOR SEVERE THUNDERSTORMS THURSDAY INTO FRIDAY.

.SPOTTER INFORMATION STATEMENT…

SPOTTER ACTIVATION IS LIKELY THIS EVENING INTO TONIGHT.

343 PM CDT SUN AUG 31 2014

…THUNDERSTORMS WITH HEAVY RAIN LIKELY TONIGHT…

Flash Flood Watch (Counties in green); Tornado Watch (Counties in yellow)

THUNDERSTORMS ARE EXPECTED TO BECOME WIDESPREAD THIS EVENING. THE STORMS WILL HAVE THE POTENTIAL TO PRODUCE HEAVY RAINFALL OVER A SHORT PERIOD OF TIME. IN ADDITION…SEVERAL STORMS MAY TRACK ACROSS SIMILAR AREAS AND FURTHER ENHANCE THE HEAVY RAIN THREAT.

IOWA COUNTIES: CRAWFORD-CARROLL-GREENE-BOONE-STORY-AUDUBON-GUTHRIE-DALLAS-POLK-CASS-ADAIR-MADISON-WARREN-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD-DECATUR-

FLASH FLOOD WATCH IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH MONDAY MORNING…

WIDESPREAD HEAVY RAINFALL OVER THE PAST WEEK HAS RESULTED IN SATURATED SOILS AND FAVORABLE CONDITIONS FOR SIGNIFICANT RUNOFF. HEAVY RAINFALL IS POSSIBLE TONIGHT WITH THE POTENTIAL FOR WIDESPREAD 1 TO 2 INCHES OF RAIN. HEAVIER RAINFALL AMOUNTS IN EXCESS OF 3 INCHES MAY OCCUR.

FLASH FLOODING IS POSSIBLE ACROSS THE REGION. SIGNIFICANT PONDING IN URBAN AREAS IS POSSIBLE. IN ADDITION…SMALL STREAMS MAY RISE ABOVE THEIR BANKS AND CAUSE FLOODING OF LOW LYING AREAS INCLUDING ROADWAYS. FLASH FLOODING AT NIGHT IS EXTREMELY DANGEROUS. IN ADDITION…THESE RAINFALL AMOUNTS WILL CAUSE A FEW LARGER STREAMS TO NEAR FLOOD STAGE OVER THE NEXT FEW DAYS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED.

335 PM CDT SUN AUG 31 2014

TORNADO WATCH 479 IS IN EFFECT UNTIL 900 PM CDT FOR THE FOLLOWING LOCATIONS

IOWA COUNTIES INCLUDED ARE: BUENA VISTA CHEROKEE CLAY CRAWFORD DICKINSON EMMET HARRISON IDA MILLS MONONA O’BRIEN OSCEOLA PALO ALTO PLYMOUTH POCAHONTAS POTTAWATTAMIE SAC SHELBY SIOUX WOODBURY.

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 335 PM UNTIL 900 PM CDT.

* PRIMARY THREATS INCLUDE…A FEW TORNADOES POSSIBLE; SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER POSSIBLE; SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG. AND 60 STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHWEST OF SPENCER IOWA TO 45 MILES SOUTHWEST OF CONCORDIA KANSAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

REMEMBER…A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

1130 AM CDT SUN AUG 31 2014

REST OF TODAY...PARTLY SUNNY. ISOLATED THUNDERSTORMS EARLY IN THE AFTERNOON…THEN SCATTERED THUNDERSTORMS LATE IN THE AFTERNOON. BREEZY. HIGH IN THE UPPER 80S. SOUTH WIND 15 TO 20 MPH. CHANCE OF THUNDERSTORMS 40 PERCENT.

TONIGHT…SHOWERS THROUGH MIDNIGHT. THUNDERSTORMS THROUGH THE NIGHT. SOME THUNDERSTORMS MAY PRODUCE DAMAGING WIND…LARGE HAIL AND HEAVY RAINFALL IN THE EVENING…THEN SOME THUNDERSTORMS MAY BE SEVERE WITH DAMAGING WIND…LARGE HAIL AND HEAVY RAINFALL. SOME THUNDERSTORMS MAY PRODUCE DAMAGING WIND…LARGE HAIL AND HEAVY RAINFALL AFTER MIDNIGHT. LOW IN THE MID 60S. SOUTH WIND 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH. CHANCE OF PRECIPITATION 90 PERCENT.

LABOR DAY…PARTLY SUNNY WITH A 20 PERCENT CHANCE OF THUNDERSTORMS UNTIL LATE AFTERNOON…THEN MOSTLY SUNNY LATE IN THE AFTERNOON. HIGH IN THE UPPER 70S. WEST WIND 5 TO 10 MPH.

MONDAY NIGHT…MOSTLY CLOUDY THROUGH MIDNIGHT…THEN PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. LOW IN THE UPPER 50S. NORTHWEST WIND NEAR 5 MPH.

TUESDAY…SUNNY. HIGH IN THE LOWER 80S. WEST WIND NEAR 10 MPH.

TUESDAY NIGHT AND WEDNESDAY…PARTLY CLOUDY. A 20 PERCENT CHANCE OF THUNDERSTORMS. LOW IN THE LOWER 60S. HIGH IN THE LOWER 80S.

IA COUNTIES: MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE…..NE COUNTIES-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-BUTLER-SAUNDERS-DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE- JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON-

1137 AM CDT SUN AUG 31 2014

THIS AFTERNOON AND TONIGHT… ISOLATED THUNDERSTORMS WILL AFFECT PARTS OF THE AREA THROUGH EARLY AFTERNOON. THESE STORMS SHOULD REMAIN MOSTLY BELOW SEVERE LIMITS. THUNDERSTORM COVERAGE AND STRENGTH SHOULD INCREASE ACROSS THE AREA LATER THIS AFTERNOON INTO THIS EVENING. CURRENT INDICATIONS SUGGEST SEVERE STORMS COULD DEVELOP BETWEEN 4 AND 6 PM IN EASTERN NEBRASKA WITH THE HIGHEST PROBABILITIES FOR THE STRONGEST STORMS INITIALLY DEVELOPING FROM OMAHA AND TEKAMAH SOUTHWEST THROUGH LINCOLN…DAVID CITY AND COLUMBUS. HOWEVER…SEVERE STORMS REMAIN A THREAT OVER THE ENTIRE REGION. THE THUNDERSTORMS SHOULD THEN DEVELOP OR SPREAD ACROSS THE REST OF THE AREA DURING THE EVENING.

LARGE HAIL…DAMAGING WINDS AND LOCALLY HEAVY RAIN ARE ALL POSSIBLE WITH THE STRONGER STORMS AND SOME OF THE HAIL COULD BE VERY LARGE. ISOLATED TORNADOES CAN NOT BE RULED OUT WITH MORE DISCRETE STORMS THAT MANAGE TO DEVELOP…ALTHOUGH THE ACTIVITY SHOULD BEGIN TO CONSOLIDATE THROUGH EVENING WITH DAMAGING WIND THE PRIMARY THREAT.

MINOR FLOODING SHOULD CONTINUE ALONG SOME SMALL STREAMS IN SOUTHEAST NEBRASKA. THAT FLOODING MAY BE AGGRAVATED OR NEW FLOODING COULD DEVELOP TONIGHT DUE TO LOCALLY HEAVY RAIN THAT MAY FALL. THE THUNDERSTORMS WILL BE THE RESULT OF A LARGE DISTURBANCE TRACKING ACROSS THE PLAINS TODAY WHICH WILL PUSH A COLD FRONT ACROSS EASTERN NEBRASKA BY EVENING AND INTO WESTERN IOWA TONIGHT.

LABOR DAY THROUGH SATURDAY…

THERE IS A CHANCE FOR THUNDERSTORMS MONDAY AND INTO MONDAY NIGHT FOR PARTS OF THE AREA. THE CHANCE OF SEVERE STORMS IN THOSE PERIODS SEEMS LOW AT THIS TIME. THUNDERSTORMS WILL ALSO BE POSSIBLE FOR PARTS OF THE AREA TUESDAY NIGHT…WEDNESDAY NIGHT AND THEN FROM THURSDAY NIGHT INTO SATURDAY AS SEVERAL DISTURBANCES CROSS THE REGION.

SPOTTER INFORMATION STATEMENT…STORM SPOTTERS COULD BE NEEDED LATER THIS AFTERNOON AND THIS EVENING.

AREA COUNTIES: SAC-CRAWFORD-CARROLL-AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-MADISON-ADAMS-UNION-TAYLOR-RINGGOLD…430 AM CDT SUN AUG 31 2014

TODAY AND TONIGHT – THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND CONTINUE TONIGHT. SEVERE WEATHER IS POSSIBLE WEST OF U.S. HIGHWAY 169 BY LATE THIS AFTERNOON AND OVER THE AREA ENTIRE AREA THIS EVENING. STRONG WINDS AND HAIL UP TO GOLF BALL SIZE ARE POSSIBLE. AN ISOLATED TORNADO IS POSSIBLE INTO THE VERY EARLY EVENING HOURS. HEAVY RAINFALL IS POSSIBLE WITH SOME STORMS PRODUCING RAINFALL TOTALS AROUND 3 INCHES.

AREA COUNTIES: MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE…

TODAY AND TONIGHT – ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS SHOULD AFFECT PARTS OF THE AREA THROUGH EARLY AFTERNOON. THESE WILL PROBABLY REMAIN MOSTLY BELOW SEVERE LIMITS.

MORE THUNDERSTORMS ARE FORECAST FOR LATER THIS AFTERNOON AND THIS EVENING. CURRENT INDICATIONS SUGGEST SEVERE STORMS COULD DEVELOP BETWEEN 3 AND 5 PM IN EASTERN NEBRASKA. THE HIGHEST PROBABILITIES IN THAT TIME ARE ACROSS NORTHEAST NEBRASKA. STORMS SHOULD THEN DEVELOP OR SPREAD ACROSS THE REST OF THE AREA DURING THE LATE AFTERNOON AND EVENING.

LARGE HAIL…DAMAGING WINDS AND LOCALLY HEAVY RAIN SHOULD BE THE PRIMARY HAZARDS BUT ISOLATED TORNADOES CAN NOT BE RULED OUT.