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Preliminary Storm reports for 8/11/16 event (updated 10:08-p.m.)

News, Weather

August 11th, 2016 by Ric Hanson

9:15-p.m. 61-mph wind gust 3 miles south of Creston (AWOS – Automated Weather Observation System)

8:46-p.m. Emergency management in Adel reports numerous trees and power lines down throughout Dallas County, affecting Adel, Dallas Center, Redfield and Dexter. A tree limb fell on the Emergency Manager’s roof.

8:08-p.m. 59-mph wind gust at the Atlantic Airport.; Numerous tree limbs down in Atlantic, an estimated 300-400 people without power according to AMU; Cass County Comm. Center on Emergency Generator; Street and stop lights out from Olive to Locust Street and 10th Street on North through the downtown area.

8:05-p.m. 4-to 6-inch tree limbs and power lines down in Bayard.

(Additional reports will be posted Friday morning, once all the information is relayed to the National Weather Service)

Power outage in Atlantic (Update 9:28-p.m.) – ALERT

News, Weather

August 11th, 2016 by Ric Hanson

Atlantic Municipal Utilities reports power is out to an estimated 300-400 households and/or businesses in town. The Cass County Communications Center and courthouse radio building were running on an emergency generator.

The Cass County Comm. Center/Emergency Management reports traffic lights are out around downtown Atlantic. Please avoid driving in this area. If you must travel, drive with caution. AMU crews are working as quickly as possible to restore power, but there is still lightning and rain in Atlantic, which is making the situation more hazardous. Please be patient.

Preliminary Storm reports from 8/11/16

Weather

August 11th, 2016 by Ric Hanson

830 PM CDT THU AUG 11 2016
..TIME… …EVENT… …CITY LOCATION… …LAT.LON…
..DATE… ….MAG…. ..COUNTY LOCATION..ST.. …SOURCE….
..REMARKS..
0808 PM TSTM WND GST 2 WNW ATLANTIC 08/11/2016 M59 MPH CASS IA AWOS REPORTED AT the Atlantic Airport.

Huge tree down south of the intersection of 7th & Olive just before 8-p.m. Thursday, blocked the southbound lane. (Ric Hanson photo)

Huge tree down south of the intersection of 7th & Olive just before 8-p.m. Thursday, blocked the southbound lane. (Ric Hanson photo)

I-80 westbound east of exit 60 (62 mile marker) one lane is blocked due to a electronic message sign on the interstate! (Update 9-p.m.: the sign has been pushed out of the traveled portion of the road)

0805 PM TSTM WND DMG BAYARD 08/11/2016 GUTHRIE IA EMERGENCY MNGR POWER LINES DOWN IN TOWN. 4 TO 6 IN LIMBS DOWN IN TOWN. TIME ESTIMATED FROM RADAR.

0846 PM TSTM WND DMG ADEL
08/11/2016 DALLAS IA EMERGENCY MNGR
NUMEROUS TREES AND POWER LINES DOWN
THROUGHOUT DALLAS COUNTY. CITIES AFFECTED
INCLUDE ADEL, DALLAS CENTER, REDFIELD, AND
DEXTER. TREE LIMB ON EM’S ROOF. TIME
ESTIMATED FROM WHEN STORM HIT ADEL.

State Fair Day 1 Forecast: Hot, rainy weather with potential flooding

News, Weather

August 11th, 2016 by Ric Hanson

Forecasters say the weather won’t cooperate much for the opening day of the Iowa State Fair. Besides the heat and humidity, thunderstorms are forecast with the potential for heavy rain. Meteorologist Mindy Beerends, at the National Weather Service in Johnston, says a Heat Advisory runs from 1 this (Thursday) afternoon until 8 tonight for a wide section of south and central Iowa.

“We’re expecting intermittent storms throughout the day and then more widespread showers and thunderstorms late this afternoon and into the overnight hours,” Beerends says, “which could bring heavy rainfall to much of the area.” While the heat and humidity combined may bring heat indices this afternoon as high as 105 degrees, much of Iowa will also likely get drenched.

“We’re expecting to see rainfall amounts of one to three inches, especially where storms persist and in some localized areas, we could see amounts of four to six inches, potentially,” Beerend says. “Lots of heavy rainfall could lead to flash flooding so we have a Flash Flood Watch out through 7 AM Friday morning.” She says dry conditions should return tomorrow afternoon along with somewhat cooler weather into the weekend.

(Radio Iowa)

Skyscan forecast & weather data for Atlantic: 8/11/16

Weather

August 11th, 2016 by Ric Hanson

Today: P/Cldy w/a chance of shwrs & tstrms this morning & later this afternoon. High 92. Heat Index around 100-105. S @ 10-20. HEAT ADVISORY from 1until 8-p.m.
Tonight: Showers and thunderstorms. Some of the storms could produce heavy rain. FLASH FLOOD WATCH 7-p.m.tonight thru 7-a.m. Friday. Low around 70. Winds becoming N/NW @ 5-10.
Friday: Showers and thunderstorms in the morning; Mostly cloudy, with a high near 82. North wind 5 to 10 mph.
Saturday & Sunday: Sunny, with highs near 83 both days.

Wednesday’s High in Atlantic was 93. Our 24-hour Low (ending today at 7-a.m.) was 73. Last year on this date, our High in Atlantic was 83 and the low was 57. The Record High in Atlantic on this date was 104 in 1894. The Record Low was 40 in 1902.

NWS forecast for Cass & adjacent Counties in IA, 8/11/16

Weather

August 11th, 2016 by Ric Hanson

Early This Morning: Mostly cloudy with a 30 percent chance of thunderstorms. South wind 5 to 10 mph.
Today:  HEAT ADVISORY from 1-pm to 8-p.m.; Hot and humid. Partly sunny with a 50 percent chance of thunderstorms. High in the lower 90s. South wind 10 to 15 mph with gusts to around 25 mph. Highest heat index readings 101 to 106 in the afternoon.
Tonight: Flash Flood Watch in effect from 7-p.m. thru 7-a.m. for Cass, Adair, Adams, Audubon, Guthrie, Carroll, Dallas, Crawford, Madison, Union, Taylor and Ringgold CountiesThunderstorms. Some thunderstorms may produce heavy rainfall. Low in the lower 70s. South wind 10 to 15 mph shifting to the southwest 5 to 10 mph after midnight. Chance of thunderstorms 80 percent. Highest heat index readings 100 to 105 through midnight.
Friday: Cloudy with thunderstorms likely through mid morning… Then mostly cloudy with a chance of thunderstorms in the late morning and early afternoon. Partly sunny late in the afternoon. Some thunderstorms may produce heavy rainfall through mid morning. High in the lower 80s. North wind 5 to 10 mph. Chance of thunderstorms 70 percent.
Saturday: Sunny. High in the lower 80s. North wind 5 to 10 mph.
Sunday: Mostly sunny. High in the lower 80s.

Skyscan forecast & weather data for Atlantic: 8/10/16

Weather

August 10th, 2016 by Ric Hanson

Today: Areas of morning fog; P/Cldy, hot & humid. High 91. Highest heat index readings 100 to 102 this afternoon. S @ 10-20.                                                                Tonight: Partly cloudy to cloudy w/a 30% chance of thunderstorms after midnight. Low 74. S @ 5-10.                                                                                                                   Tomorrow: P/Cldy w/isolated showers & thunderstorms (mainly in the morning). High 92. Heat Index 100-105. S @ 10-20                                                                              Tom. Night: Thunderstorms likely. Low around 70. Highest heat index readings 100 to 102 through midnight.                                                                                                         Friday: Mostly cloudy w/a 40% chance of thunderstorms. High 83. N @ 5-10. Saturday: P/Cldy. High 82.

Tuesday’s High in Atlantic was 88. Our 24-hour Low (ending today at 7-a.m.) was 68. Last year on this date, our High in Atlantic was 86 and the low was 55. The Record High in Atlantic on this date was 105 in 1894. The Record Low was 42 in 1967.

Iowa’s tornado tally is below average in 2016, not that anyone’s complaining

News, Weather

August 10th, 2016 by Ric Hanson

It’s a below-average year for tornadoes in Iowa. While they can strike during any month of the year, the peak time for twisters in the state is usually during May and June. Kevin Skow, a meteorologist at the National Weather Service in metro Des Moines, says Iowans should not let their guard down as dark clouds could still spawn dangerous, swirling cyclones.

“So far this year, we’ve seen 33 tornadoes across the state and our average number of tornadoes is typically around 48 to 49 in a given year,” Skow says. “However, even though the bulk of our tornado season, the typical climatological peak is past, we can still see late-season outbreaks as was the case last year with our November 11th and even some December tornadoes. We’re certainly not out of the woods quite yet.”

Of the 33 tornadoes confirmed in Iowa this year, 24 of them were rated in the weakest category of E-F-zero, while seven were E-F-ones and only two got big enough to rank as E-F-twos. There have been no E-F-threes, fours or fives. “Most of our tornadoes, generally the vast majority, are weak EF-0,” Skow says. “They’re very short-lived and have path lengths a mile or two at best. Many times, they didn’t impact any structures and again, they’re very weak, which is what we’d like to see.”

The first three confirmed tornadoes this year all touched down on March 15th in Scott and Clinton counties, while the most recent tornado was just last week in Council Bluffs. That twister on Thursday afternoon was a relatively rare “rope” tornado or waterspout that churned up Lake Manawa. Hundreds of people in the metro area saw it and took pictures and video, including one passenger on a jetliner landing at Eppley Airfield in Omaha.

“We were very, very thankful it didn’t move anywhere,” Skow says. “It just sat out over the lake there and didn’t move. It didn’t impact anything. It was just stationary and lasted at least five to ten minutes.” Something else that’s unusual this year, there were two days where five tornadoes were reported on the same day: April 27th saw five twisters in southwestern Iowa and July 17th brought five more in eastern Iowa.

(Radio Iowa)

NWS forecast for Cass & area Counties, 8/10/2016

Weather

August 10th, 2016 by Ric Hanson

Early This Morning: Clear. Patchy fog. South wind near 5 mph.

Today: Mostly sunny. Hot and humid. Patchy fog through mid morning. A 20 percent chance of thunderstorms in the afternoon. High around 90. South wind 5 to 15 mph. Highest heat index readings 100 to 102 in the afternoon.

Tonight: Partly cloudy until early morning then becoming mostly cloudy. A 30 percent chance of thunderstorms after midnight. Low in the mid 70s. South wind 5 to 10 mph.

Thursday: Mostly sunny. Hot and humid. A chance of thunderstorms in the morning. A chance of thunderstorms late in the afternoon. High in the lower 90s. South wind 5 to 15 mph. Chance of thunderstorms 30 percent. Highest heat index readings 100 to 105 in the afternoon.

Thursday Night: Thunderstorms likely. Low around 70. South wind 5 to 15 mph decreasing to up to 5 mph after midnight. Chance of thunderstorms 70 percent. Highest heat index readings 100 to 102 through midnight.

Friday: Partly sunny with a 40 percent chance of thunderstorms. High in the mid 80s. North wind 5 to 10 mph.

Saturday: Mostly sunny. High in the lower 80s.

Skyscan forecast & weather data for Atlantic: 8/09/16

Weather

August 9th, 2016 by Ric Hanson

Today: Patchy fog through mid morning; Partly Cloudy. High 87. SE @ 10-15.
Tonight: P/Cldy. Low 71. S @ 5-10.
Wednesday: P/Cldy, hot and humid. High 91. Heat index 100-103. S @ 10-15.
Wed. Night: Mostly clear. Low 73.. South wind 10 to 15 mph. Highest heat index readings 100 to 102 through midnight.
Thursday: P/Cldy w/a 30 % chance of afternoon thunderstorms. High 92. S @ 10-20 w/gusts to 25. Highest heat index readings 100 to 102 in the afternoon.
Thursday Night: A 60% chance of thunderstorms likely. Low around 70. .
Friday: Mostly cloudy with a 30% chance of thunderstorms. High 83.

Monday’s High in Atlantic was 80. Our 24-hour Low (ending today at 7-a.m.) was 58. Last year on this date, our High in Atlantic was 86 and the low was 63. The Record High in Atlantic on this date was 111 in 1934. The Record Low was 44 in 1907.