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Flood Warning: Shelby County until 6:30-p.m. today (3/13)

Weather

March 13th, 2019 by Ric Hanson

The National Weather Service in Omaha has issued a Flood Warning for Rain and Snowmelt in Central Shelby County until 6:30-p.m. today (Wednesday).

* At 630 AM CDT, a reporting gauge near Harlan on the West Nishnabotna River was reporting levels just below flood stage but rising very fast. Flooding could likely begin in the area shortly.
Up to one half inch of rain has already fallen. Some locations that will experience flooding include…Harlan, Irwin, Kirkman and Nishna Bend Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Be especially cautious at night when it is harder to recognize the dangers of flooding. A Flood Warning means that flooding is imminent or occurring. All interested parties should take necessary precautions immediately.

Local 24-Hour Rainfall Totals ending at 7:00 am on Wednesday, March 13

Ag/Outdoor, Weather

March 13th, 2019 by Jim Field

  • KJAN, Atlantic  .36″
  • Massena  .26″
  • Clarinda  .3″
  • Shenandoah  .3″
  • Audubon  .29″
  • Hastings  .28″
  • Manning  .71″
  • Persia  .5″
  • Creston  .3″
  • Council Bluffs  .39″
  • Underwood  .37″
  • Carroll  .45″
  • Denison  .32″
  • Corning  .24″
  • Red Oak  .23″

Council Bluffs and Pottawattamie County Prepare for Potential Historic Flooding

News, Weather

March 13th, 2019 by Ric Hanson

As heavy rains move in and snow melt continues, the potential for river flooding begins. Officials in Pottawattamie County are preparing for what the National Weather Service has described as a flood event that has historic potential, primarily along the West Nishnabotna River. Levels at the Missouri River are forecast to reach a potential 29 feet in minor flood stage by 7am Saturday morning, similar to events observed last summer. The Nishnabotna is forecast to crest at just over 26 feet in major flood stage by 1am Thursday, topping the 23.5 foot record set in July of 1993.

Pott. County EMA

Doug Reed, Pott. County Director of Emergency Management, says “There are many variables in this scenario that will impact the river levels. With existing snow pack, frozen ground, and varying ranges of potential rainfall this event could go either way – however, we need to be prepared for the worst-case potential.” In doing so, a Declaration of Disaster Emergency has been authorized for the communities of Avoca, Hancock, Oakland, Carson, Macedonia, Council Bluffs, and unincorporated areas of Pottawattamie County as a preemptive measure should any of the jurisdictions require assistance from mutual aid partners or state agencies based on actual observed conditions.

Currently, county and city agencies are preparing to secure storm sewer systems, roads, and other infrastructure that may be impacted. Urban streets are likely to experience flooding during the heavy rain event and some rural highways and roads near and around the Nishnabotna River could be closed due to floodwaters. Pottawattamie County Conservation is working to relocate the Botna Bend Park buffalo herd to a safer location and moving the elk herd to a higher elevation within the park. Emergency Management has been coordinating additional resource support with Iowa Homeland Security and Emergency Management should they be needed and coordinating preparedness efforts with partners such as MidAmerican Energy and others.

Residents and people with interests along the rivers are advised to begin monitoring river conditions and prepare accordingly. With frozen ground conditions creating higher runoff than normal, river levels have the potential to rise more rapid than in normal high water and flooding events. For more information on flood preparedness, visit the Floods and Flash Floods page at www.beready.iowa.gov.  To receive emergency weather warnings and community alerts such as evacuations, shelter locations, and other emergency notices, sign up for free alerts from Pottawattamie Alert, part of the Alert Iowa Network, at www.pottcounty-ia.gov.

DENSE FOG ADVISORY thru this afternoon (3/13) WIND ADVISORY thru this evening

Weather

March 13th, 2019 by Ric Hanson

A DENSE FOG ADVISORY remains in effect for the listening until early this afternoon. And a WIND ADVISORY is in effect from 10-a.m. today (Wednesday) until 7-p.m. Visibility of less then 1/4 of a mile or less can be expected through mid-morning. SE winds of 25-35 mph gusting up to 45 mph are expected by late this morning into the early evening hours.

The very dense fog will impact the morning commute and cause tricky travel at times. Even in daylight, please use low beam headlights and allow extra space between you and the vehicle ahead of you. Gusty winds may make travel difficult for high-profile vehicles later today, especially during the evening commute.

A Wind Advisory means that sustained winds of 30 mph or wind gusts of 45 mph or greater are expected. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

Flood Warning for NE Mills & S. Central Pottawattamie County until 4:45-p.m. 3/13

Weather

March 13th, 2019 by Ric Hanson

The National Weather Service in Omaha has issued a

* Flood Warning for…Rain and Snowmelt in… Northeastern Mills County and South central Pottawattamie County....Until 445 PM CDT Wednesday.

* At 443 AM CDT, a reporting gauge near Henderson on the West Nishnabotna River was reporting stages slightly above flood stage. Flooding will likely continue in the area today.

* Some locations that will experience flooding include…Macedonia, Henderson and Old Town Park.

The Flood Warning continues for The West Nishnabotna River At Hancock. from early this morning to Friday afternoon…or until the warning is cancelled.
* At 4:15 AM Wednesday the stage was 14.1 feet…or 0.1 feet above flood stage. * Flood stage is 14.0 feet.
* Minor flooding is occurring and Record flooding is forecast.
* Forecast…The river will continue rising to near 24.3 feet by after midnight tomorrow. The river will fall below flood stage late tomorrow evening.
* Impact…at 24.0 feet…The top of the berm protecting the lagoons for the city of Hancock are overtopped.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the
dangers of flooding. A Flood Warning means that flooding is imminent or occurring. All interested parties should take necessary precautions immediately.

Flood Watch info. for the listening area, 3/13/19

Weather

March 13th, 2019 by Ric Hanson

410 AM CDT Wed Mar 13 2019 …River flooding and Significant Ponding Water Likely This Week Due to Snowmelt and Expected Rainfall… .The combination of warmer temperatures and forecast total rainfall amounts of one to near two inches is going to lead to a rapid snow melt across much of central Iowa. Significant ponding of water in low lying, poor drainage is likely, potentially impacting roads and travel. Periods of rainfall are likely today into Thursday, with the highest totals occurring today into this evening. The runoff from the snowmelt and rain will lead to significant rises on area streams. Ice jam flooding may occur, creating rapid rises upstream of the jams. Minor to moderate river flooding is possible by Thursday and into the weekend.

Sac-Crawford-Carroll-Audubon-Guthrie-Dallas-Cass-Adair-Madison-Adams-Union- Taylor-Ringgold-Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont- Page Counties: FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY EVENING… Rapid snowmelt and rainfall is expected to lead to significant ponding of water in low lying, poor drainage areas. The added water and the potential for ice jams may lead to significant rises on rivers and streams.  PRECAUTIONARY/PREPAREDNESS ACTIONS… A Flood Watch means there is a potential for flooding based on current forecasts. If you live in ice jam flood prone areas, be aware of potential significant rises on area streams through Thursday. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Nishnabotna River Flood Outlook (near Atlantic) – 3/13/19

Weather

March 13th, 2019 by Ric Hanson

359 AM CDT Wed Mar 13 2019

FLOOD WATCH until this evening. Conditions across the area are primed for flooding potential due to lingering snow pack with 1 to 2 inches or more of water continuing to melt and mostly frozen grounds unable to absorb existing water. River forecasts include observed precipitation, as well as expected precipitation over the next 48 hours. At this time there is limited confidence associated with rainfall amounts and the location of predicted rainfall. If rainfall in the basin is less than predicted, the forecast river stage may not be reached. Conversely, if rainfall is more than predicted the river may crest higher. As the forecast becomes more certain, this watch will be either upgraded to a Flood Warning or canceled.

The Flood Watch continues for The East Nishnabotna River near Atlantic, or From Troublesome Creek near Atlantic…to Indian Creek near Lewis.
* Until this evening.
* At 3:00 AM Wednesday the stage was 11.2 feet, or 7.8 feet below Flood Stage.
* Flood Stage is 19.0 feet.
* No flooding is occurring and Minor flooding is forecast.
* Forecast…rise to Flood Stage this evening. Continue rising to
19.1 feet, or 0.1 feet above Flood Stage, this evening. Then begin
falling and go below Flood Stage this evening.
* There is limited confidence in this river forecast. Forecasts may change so monitor for updated information.

Skyscan Forecast for Atlantic & the area: Wed., March 13, 2019

Weather

March 13th, 2019 by Ric Hanson

Today: *DENSE FOG ADVISORY until 1-p.m.*WIND ADVISORY 10-a.m. to 7-p.m.*FLOOD WATCH through Thursday evening; Fog this morning, Showers & scattered thunderstorms , some may produce heavy rain. High 58. S @ 15-30.

Tonight: Light rain or drizzle. Low 46. S-W @ 10-20.

Tomorrow: Light rain. High nearly steady in the 40’s. NW @ 15-30.

Friday: P/Cldy. High 41.

Saturday: P/Cldy. High 46.

Yesterday’s High in Atlantic was 45. Our Low was 37. 24-hours rainfall at KJAN (through 7-a.m. today) was .36”. Last year on this date our High was 46 and the Low was 16. The record High in Atlantic on this date was 72 in 2012. The Record Low was -11 in 1948 and 1975.

Dense Fog, Wind, and Flood Advisories posted across the region

Weather

March 12th, 2019 by admin

The National Weather Service has now posted Dense Fog, Wind, and Flood Advisories across the KJAN listening area for the next two days. Here is a look at the rundown of those latest additions to the weather situation in the Nishna Valley.

The National Weather Service in Omaha has issued a

* Flood Advisory for Rapid Rises for Rain and Snowmelt in Mills, Shelby, Monona, Pottawattamie, Montgomery, Fremont, Harrison, and Page Counties in the listening area until 7:45pm on Tuesday.
* At 141 PM CDT, emergency management and storm spotters reported
that snowmelt was causing minor flooding of both rural and urban
roads. This situation will likely become more widespread tonight
into Wednesday as rainfall increases in areal coverage and
intensity. If traveling, be alert to road closures and the
potential for water-covered sections of road. This is especially
the case at night when visibility is reduced.

Audubon-Guthrie-Cass-
…DENSE FOG ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 7 AM
CDT WEDNESDAY…
…WIND ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT WEDNESDAY…

Crawford-Carroll-Greene-
…DENSE FOG ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 7 AM
CDT WEDNESDAY…

Adair-Adams-Union-Taylor-Ringgold
…WIND ADVISORY IN EFFECT FROM 10 AM TO 7 PM CDT WEDNESDAY…

The National Weather Service in Des Moines has issued a Dense Fog
Advisory, which is in effect from 7 PM this evening to 7 AM CDT
Wednesday. A Wind Advisory has also been issued. This Wind
Advisory is in effect from 10 AM to 7 PM CDT Wednesday.

* TIMING…Dense fog advisory tonight, Wind Advisory through the
day Wednesday.

* WINDS…Southeast at 25 to 35 mph gusting to 45 mph Wednesday.

* VISIBILITY…Around 1/4 mile or less tonight.

* IMPACTS…With the recent rain and additional rain expected,
combined with low visibility. Water ponding on roads may be
difficult to see, especially at night. Take it slow when driving,
especially in low-lying areas and in areas of poor drainage.
Gusty winds may make travel difficult for high-profile vehicles
on Wednesday.

Flood Warning issued for West/East Nish & Nodaway Rivers beginning Wed. afternoon

Weather

March 12th, 2019 by Ric Hanson

1058 AM CDT Tue Mar 12 2019

The National Weather Service in Omaha has issued a flood warning for the following rivers in Iowa:

  • West Nishnabotna River at Hancock affecting Pottawattamie County. The Warning is in effect from Wednesday afternoon to Friday evening, or until the warning is cancelled. At 10:00 AM Tuesday the stage was 7.2 feet, or 6.8 feet below flood stage. Flood stage is 14.0 feet. Record flooding is forecast. The river is forecast to rise above flood stage by early tomorrow afternoon and continue to rise to near 26.2 feet by early Thursday morning. The river will fall below flood stage by early Friday morning.
  • –East Nishnabotna River at Red Oak affecting Montgomery County. The Warning is in effect from Wednesday afternoon to Saturday morning, or until the warning is cancelled. At 10:00 AM Tuesday the stage was 11.7 feet, or 6.3 feet below flood stage. Flood stage is 18.0 feet. Moderate flooding is forecast. The river is forecast to rise above flood stage by tomorrow afternoon and continue to rise to near 25.9 feet by early Friday morning. The river will fall below flood stage by Friday afternoon.
  • Nishnabotna River above Hamburg affecting Fremont County. The Warning is in effect from Wednesday afternoon until further notice. At 10:45 AM Tuesday the stage was 17.9 feet, or 7.1 feet below flood stage. Flood stage is 25.0 feet. Moderate flooding is forecast. The river is forecast to rise above flood stage by tomorrow afternoon and continue to rise to near 30.4 feet by early Friday afternoon.
  • West Nishnabotna River At Randolph affecting Fremont County. The Warning is in effect from Wednesday afternoon to Saturday afternoon, or until the warning is cancelled. At 10:00 AM Tuesday the stage was 15.1 feet, or 3.9 feet below flood stage. Flood stage is 19.0 feet. Record flooding is forecast. The river is forecast to rise above flood stage by tomorrow afternoon and continue to rise to near 26.4 feet by early Thursday afternoon. The river will fall below flood stage by Friday evening.
  • Nodaway River at Clarinda affecting Page County. The Warning is in effect from Wednesday morning to Thursday evening, or until the warning is cancelled. At 10:15 AM Tuesday the stage was 14.2 feet, or 8.8 feet below flood stage. Flood stage is 23.0 feet. Minor flooding is forecast. The river is forecast to rise above flood stage by late tomorrow morning and continue to rise to near 25.2 feet by tomorrow evening. The river will fall below flood stage by Thursday morning.

Do not drive cars through areas where water covers the road.  The water depth may be too great to allow your vehicle to pass safely. A Flood Watch is in effect for all of southwest Iowa from Wednesday morning through Thursday evening.