350 AM CDT SUN JUN 22 2014
…HEAVY RAIN AND FLASH FLOODING POSSIBLE ONCE AGAIN…
AMPLE MOISTURE WILL FEED THUNDERSTORMS ACROSS IOWA TODAY INTO TONIGHT. THIS MAY LEAD TO HEAVY RAINFALL AND THE POSSIBILITY OF FLASH FLOODING IN THE WATCH AREA. AREA COUNTIES AFFECTED: SAC-CRAWFORD-CARROLL-AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-MADISON-ADAMS-UNION-TAYLOR…FLASH FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH MONDAY MORNING.
* HEAVY RAIN IS EXPECTED FROM SLOW MOVING THUNDERSTORMS THIS AFTERNOON INTO TONIGHT. OVER AN INCH OR TWO OF RAIN IS POSSIBLE IN A SHORT PERIOD OF TIME FROM THESE STORMS. GIVEN THE VERY MOIST SOIL CONDITIONS ACROSS THE WATCH AREA…FLASH FLOODING WILL BE A POSSIBILITY FROM THIS AFTERNOON INTO TONIGHT. THIS MAY ALSO RENEW RIVER FLOODING OR AGGRAVATE EXISTING FLOODING.
* DRIVING AT NIGHT DURING FLASH FLOOD SITUATION IS EXTREMELY DANGEROUS AS DRIVERS MAY UNDERESTIMATE THE DEPTH OF THE WATER OR MAY COME ACROSS AREAS PRONE TO WASHOUTS.
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.
OMAHA, Neb. (AP) — The National Weather Service has issued a flood warning for parts of Nebraska and Iowa along the Missouri River, and storms that dumped nearly 7 inches of rain on parts of Omaha haven’t helped. The National Weather Service says 6.83 inches of rain fell at the Millard Airport in Omaha from Friday night to about 7 a.m. Saturday — and more could be on the way.
The storms flooded low-lying Omaha streets and forced a College World Series game between Mississippi and Virginia to be postponed. The weather service says there is a 40 percent chance of showers and thunderstorms for the area on Sunday and a 50 percent chance on Monday.
The Flood Warning continues until 1-p.m. Sunday for the Missouri River….near Blair, NE., affecting Harrison County in Iowa…and near Omaha, affecting Pottawattamie County.
Strong storms that moved from Nebraska into western and southwest Iowa Friday night resulted in street flooding in Omaha, reports of dime-to quarter-sized hail, potentially damaging winds, and the postponement of a College World Series game. A Flash Flood Warning that was issued just after midnight for northwestern Mills and south central Pottawattamie County, was allowed to expire at 6:30-a.m. Officials say the heavy rain which prompted the warning has ended, and flooding in those areas is no longer expected to pose a threat.
Storm clouds form waves near the KJAN studios at around 9-p.m., Friday. (Ric Hanson photo)
Here in Atlantic, we received just over one-inch of rain at the KJAN studios on the north side of town. A little further into town, 1.2-inches was reported. The storms moved into Harrison and Shelby Counties a little at around 6-p.m., Friday, dumping quarter-sized hail and winds of up to 45 miles per hour near Little Sioux. Less than an hour later, those winds had increased to over 55-miles per hour.
At around 8-p.m., dime-sized hail was reported near Mondamin, in Harrison County. A few minutes later, dime-to-quarter size hail was reported by a spotter in Missouri Valley. At about that same time, spotters at the Persia Fire station recorded a 60-mile per hour gust of wind. And, at around 8:15-p.m., the Harlan Airport’s automated weather observation system recorded a wind gust of up to 58-miles per hour.
There were no immediate reports of damage associated with the wind and hail events. Today’s forecast calls for the possibility of additional thunderstorm activity later this afternoon and tonight. The storms will be capable of producing heavy rainfall, damaging winds and large hail. Additional periods of thunderstorms are possible Sunday through next Friday, severe weather and heavy rain are possible as well. Information with regard to the timing and location of these storms will unfold as the week progresses.
AREA COUNTIES: MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE-
545 AM CDT SAT JUN 21 2014
TODAY AND TONIGHT…ISOLATED NON SEVERE THUNDERSTORMS ARE POSSIBLE THIS MORNING OVER SOUTHEAST NEBRASKA AND SOUTHWEST IOWA. ADDITIONAL THUNDERSTORMS ARE LIKELY TO MOVE INTO NORHTEAST NEBRASKA THIS EVENING…AND ACROSS THE REST OF THE AREA OVERNIGHT. ISOLATED SEVERE WEATHER IS POSSIBLE WITH THIS ACTIVITY WITH THE
MAIN THREATS OF STRONG WINDS…HEAVY RAIN AND SMALL HAIL.
SUNDAY THROUGH FRIDAY….PERIODS OF THUNDERSTORMS ARE POSSIBLE SUNDAY AND SUNDAY NIGHT AS A WEAK BOUNDARY DROPS THROUGH THE REGION AND AN UPPER LEVEL DISTURBANCE CROSSES THE PLAINS. A FEW OF THESE STORMS COULD BE SEVERE WITH DAMAGING WINDS AND HAIL THE PRIMARY HAZARDS.
ADDITIONAL THUNDERSTORMS ARE POSSIBLE WEDNESDAY THROUGH FRIDAY.
SPOTTER INFORMATION STATEMENT…SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED TODAY OR TONIGHT.
AREA COUNTIES: SAC-CRAWFORD-CARROLL-AUDUBON-GUTHRIE-DALLAS-CASS- ADAIR-MADISON-ADAMS-UNION-TAYLOR-RINGGOLD
TODAY AND TONIGHT… THUNDERSTORMS WILL DIMINISH ACROSS THE AREA THIS MORNING. THE RISK OF SEVERE STORMS IS LOW. LATER THIS AFTERNOON AND TONIGHT ADDITIONAL THUNDERSTORMS ARE POSSIBLE. THE STORMS THIS AFTERNOON AND TONIGHT WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL. SEVERE STORMS ARE POSSIBLE WITH DAMAGING WIND AND LARGE HAIL THE MAIN THREATS.
SUNDAY THROUGH FRIDAY…. THERE WILL BE PERIODS OF THUNDERSTORMS THROUGH THE PERIOD. SEVERE STORMS AND HEAVY RAINFALL WEATHER IS POSSIBLE. SPECIFIC THREATS…TIMING AND LOCATION WILL BE BETTER DEFINED IN THE COMING DAYS. .
SPOTTER INFORMATION STATEMENT… SPOTTER ACTIVATION MAY BE NEEDED FROM TIME TO TIME THROUGH THE PERIOD.
Friday’s High in Atlantic was 87. Our low through 5-am Saturday (today) 63. Rainfall at the KJAN studios since 9-p.m. Frday (thru 6-am Sat.) amounted to 1.01″.
The Freese-Notis forecast for Sat., 6/21/14…..
Today will be mostly cloudy in the morning with scattered showers before 10 AM, becoming partly to mostly cloudy with showers and thunderstorms developing in the afternoon. Some of the storms in the afternoon and evening may be severe, with damaging winds and large hail possible. The high will be 88 with S winds becoming SE in the afternoon at 10-20 mph.
Tonight will be mostly cloudy with scattered showers and thunderstorms and a low of 66 and NE winds becoming SE by dawn at 10-15 mph.
Sunday will be partly to mostly cloudy with scattered showers and thunderstorms and a high of 88 and SE winds at 10-15 mph in the morning becoming W in the afternoon.
Sunday night will be mostly cloudy with scattered showers and thunderstorms likely, especially before 3 AM, and a low of 65 with W-NW winds at 5-15mph.
Monday will be mostly cloudy with showers and thunderstorms likely and a high of 78. Showers and thunderstorms will end by 9 PM with conditions becoming mostly to partly cloudy by dawn and a low of 64.
Tuesday will be partly cloudy with a high reaching 80.
Tuesday night will be partly cloudy with a low falling to 65. Total rainfall will be around 1-1.5 inches, with higher amounts possible with heavy, prolonged thunderstorms.
A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM CDT SATURDAY FOR NORTHWESTERN MILLS and SOUTH CENTRAL POTTAWATTAMIE COUNTIES IN IOWA, AND NORTHEASTERN SARPY IN NEBRASKA.
EARLIER THIS (SATURDAY) MORNING, DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO FOUR INCHES OF RAIN HAVE ALREADY FALLEN.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE…
BELLEVUE…PAPILLION AND OFFUTT AFB.
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.
HARRISON IA-MONONA IA-
955 PM CDT FRI JUN 20 2014
THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A
* FLOOD ADVISORY FOR…
CENTRAL HARRISON COUNTY IN SOUTHWEST IOWA…
SOUTHEASTERN MONONA COUNTY IN WEST CENTRAL IOWA…
* UNTIL 300 AM CDT
* AT 955 PM CDT…DOPPLER RADAR INDICATED HEAVY RAIN DUE TO
THUNDERSTORMS. THIS WILL CAUSE MINOR FLOODING IN THE ADVISORY AREA.
UP TO THREE INCHES OF RAIN HAVE ALREADY FALLEN.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE…
LOGAN…MODALE…PISGAH…MOORHEAD…WOODBINE…MAGNOLIA…SCHABEN
PARK…PREPARATION CANYON STATE PARK AND WILLOW LAKE RECREATION
AREA.
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.
Here are some weather observances reported to the National Weather Service….
8:15-p.m. 6/20 – 58 mph tstrm wind gust at the Harlan Airport AWOS site.
8:10-p.m. 6/20 – 60 mph tstrm wind gust in Persia (Fire-Rescue Spotter report)
8:09-p.m. 6/20 – Dime-to Quarter-size hail in Missouri Valley (spotter report)
8:02-p.m. 6/20 – Dime-size hail 2 miles s/se of Mondamin in Harrison Co. (public report)
7:00-p.m. 6/20 – 50-to 55-mph winds at Little Sioux in Harrison Co. (spotter report)
6:20-p.m. 6/20 – 1″ diameter (quarter-size) hail & winds of 40-45mph in Little Sioux.
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