1127 AM CDT WED MAY 2 2012
DAY ONE…THIS AFTERNOON AND TONIGHT:
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS ALL OF CENTRAL IOWA WITH A MODERATE RISK IN A SMALL AREA OF WEST CENTRAL IOWA. TIMING WILL BE FROM LATE THIS AFTERNOON INTO TONIGHT WITH DAMAGING WINDS…LARGE HAIL AND ISOLATED TORNADOES ALL POSSIBLE. HEAVY RAINS AND LOCALIZED FLASH FLOODING MAY OCCUR AS WELL.
DAYS TWO THROUGH SEVEN…THURSDAY THROUGH TUESDAY:
CHANCES FOR THUNDERSTORMS WILL CONTINUE OFF AND ON RIGHT THROUGH EARLY NEXT WEEK. THE BEST POTENTIAL FOR SEVERE WEATHER IN THIS PERIOD APPEARS TO BE LATE THURSDAY AFTERNOON AND THURSDAY EVENING FROM CENTRAL INTO SOUTHERN IOWA WHERE A SLIGHT RISK OF SEVERE WEATHER CONTINUES. DAMAGING WINDS…LARGE HAIL…LOCALLY HEAVY RAINS AND ISOLATED TORNADOES ALL REMAIN POSSIBLE. DETAILS REGARDING THE SEVERE WEATHER POTENTIAL IN THE LATER PERIODS WILL BE BETTER DEFINED IN THE COMING DAYS.
604 AM CDT WED MAY 2 2012
FAR WEST/SOUTHWEST IOWA: STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE FROM LATE THIS AFTERNOON INTO THE OVERNIGHT HOURS. STORMS ARE LIKELY TO DEVELOP LATE THIS AFTERNOON FROM CENTRAL TO NORTHEAST NEBRASKA…THEN SPREAD SOUTHEASTWARD THROUGH THE EVENING AND OVERNIGHT HOURS INTO EASTERN NEBRASKA AND WESTERN IOWA. THE MAIN THREAT AREA FOR SEVERE WEATHER ON WEDNESDAY WILL BE ALONG AND NORTH OF INTERSTATE 80. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREAT…AND LOCALLY HEAVY RAINFALL ALSO IS POSSIBLE.
WEST CENTRAL/CENTRAL IOWA: LATE THIS AFTERNOON AND TONIGHT THE POTENTIAL FOR THUNDERSTORMS WILL INCREASE WITH A MODERATE RISK OF SEVERE WEATHER FROM CENTRAL INTO WEST CENTRAL IOWA AND A SLIGHT RISK ELSEWHERE. DAMAGING WINDS…LARGE HAIL AND ISOLATED TORNADOES ARE ALL POSSIBLE. HEAVY RAINS AND LOCALIZED FLASH FLOODING MAY OCCUR AS WELL.
CHANCES FOR THUNDERSTORMS WILL CONTINUE OFF AND ON RIGHT THROUGH EARLY NEXT WEEK. SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY AND TONIGHT.
Here’s the (Podcast) forecast for Atlantic & the KJAN listening area for Wed., May 2nd, 2012…
Rainfall in Atlantic through 5-a.m. was .67″.
341 AM CDT WED MAY 2 2012
TODAY…BECOMING PARTLY SUNNY. HIGH IN THE MID 80S. SOUTH WIND 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH.
TONIGHT…MOSTLY CLOUDY. A CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT…THEN THUNDERSTORMS LIKELY AFTER MIDNIGHT. SOME THUNDERSTORMS MAY BE SEVERE AFTER MIDNIGHT. LOW IN THE MID 60S. SOUTH WIND 5 TO 15 MPH. GUSTS UP TO 25 MPH THROUGH MIDNIGHT. CHANCE OF THUNDERSTORMS 70 PERCENT.
THURSDAY…PARTLY SUNNY. A SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING…THEN A CHANCE OF THUNDERSTORMS IN THE AFTERNOON. HIGH IN THE LOWER 80S. SOUTHWEST WIND NEAR 10 MPH. CHANCE OF THUNDERSTORMS 50 PERCENT.
THURSDAY NIGHT…MOSTLY CLOUDY. A CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT…THEN A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. LOW IN THE LOWER 60S. NORTHWEST WIND NEAR 5 MPH SHIFTING TO THE NORTHEAST AFTER MIDNIGHT. CHANCE OF THUNDERSTORMS 50 PERCENT.
FRIDAY…MOSTLY SUNNY WITH A SLIGHT CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS. HIGH IN THE MID 80S. SOUTHEAST WIND 5 TO 10 MPH. CHANCE OF PRECIPITATION 20 PERCENT.
FRIDAY NIGHT…PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF THUNDERSTORMS. LOW IN THE MID 60S.
SATURDAY…PARTLY SUNNY. HIGH IN THE LOWER 80S.
310 AM CDT WED MAY 2 2012
AT 308 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES WEST OF HARLAN…MOVING EAST AT 35 MPH.
HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE… HARLAN…ELK HORN…EARLING…IRWIN… PORTSMOUTH…PANAMA… WESTPHALIA…KIRKMAN AND TENNANT. THIS INCLUDES HIGHWAY 59 BETWEEN MILE MARKERS 73 AND 85.
State Climatologist Harry Hillaker says the just completed month of April helped push the state to a new weather record. “For the first third of the year temperature wise, running about seven-point-four degrees above normal ,for the first four months of 2012. Preliminarily that would be the warmest first third of the year on record — about three-tenths of a degree above 1878 — which had been the previous warmest January through April period in Iowa,” Hillaker explains.
April was the seventh straight month were we’ve seen the average temperature end above the norm.Hillaker says April averaged about three degrees above normal, which made it end up just under one degree above the average temperature in March. “So if it seems like this month was not much warmer than the previous (month), that would be correct, they are both very similar,” Hillaker says. There was some April fooling going on by Mother Nature when it came to the temperatures, as Hillaker says the month started warmer than it finished.
“The first half of the month was averaging about six degrees warmer than usual. The second half of April was slightly cooler than normal, so overall not really much trend as we went through the month, usually you kind of expect things to be the other way around,” the climatologist says. Hillaker says April provided another possible record when you compare the temperatures from the eastern cities to the temperatures in March.
“One interesting little tidbit for what it’s worth, most of eastern Iowa actually averaged warmer temperatures for the month of March than it did for the month of April,” Hillaker says. “Places like Waterloo, Dubuque, Cedar Rapids, the Quad Cities, were slightly warmer in March than they were in April. Most likely that’s the first time that’s ever happened.” The numbers show April was wetter than average. Hillaker says the statewide average was three-point-nine-nine inches of precipitation in April, which is about one-half inch more than the average for April. He says that ranks it as the 31st wettest April in 140 years of records, and it is very similar to the April totals the last three years. Hillaker says the first third of the year saw about two-thirds of an inch more rainfall than we usually see, but he says it’s about what we’ve seen over the same period the last few years. It ranks as the 29th wettest first four months of the year on the state record books. There is a possibility that we also saw the first snowless April since 1890. Hillaker says there was a report of sleet on April 28th, which is technically considered snow.
In Atlantic, the average high for the month of April was 67.7-degrees. The average low was 40.2. Rainfall for the month amounted to 4.18-inches. The normal average high for the month is 62.6, while the normal monthly low is 37. Rainfall in April normally averages 3.01-inches.
(Dar Danielson/Radio Iowa, & Ric Hanson/KJAN)
A Severe Thunderstorm Watch that had been extended until 4-a.m. for Cass and surrounding Counties has instead been cancelled. Storms passing through early this morning no longer fall under the level needed for a Watch status. Some storms may produce occasional, brief heavy rain and gusty winds, though.
120 AM CDT WED MAY 2 2012
…A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR AUDUBON AND
GUTHRIE COUNTIES UNTIL 145 AM CDT…
AT 117 AM CDT…NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL…AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 9 MILES
EAST OF AUDUBON…OR 24 MILES NORTHEAST OF ATLANTIC…MOVING EAST AT
LOCATIONS IMPACTED INCLUDE…
PREPARE FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE
OUTSIDE SHOULD MOVE TO A REINFORCED BUILDING AND AWAY FROM WINDOWS.
PREPARE FOR DAMAGING WINDS…FALLING TREES AND FLYING DEBRIS. MOVE
INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A MOBILE HOME…GET
OUT NOW…AND SEEK SHELTER IN A REINFORCED BUILDING.
The Severe Storms Predication Center in Norman, OK, has issued a SEVERE THUNDERSTORM WATCH (#224) until 1-a.m. CDT for the Following Counties in the KJAN listening area:
ADAIR-AUDUBON- CARROLL-CASS- CRAWFORD- FREMONT-GREENE-GUTHRIE- HARRISON-MILLS-MONONA-MONTGOMERY POTTAWATTAMIE-SAC and SHELBY.
A Severe Thunderstorm Watch is issued when conditions are favorable for the development of severe thunderstorms in and close to the watch area. A severe thunderstorm by definition is a thunderstorm that produces one inch hail or larger in diameter and/or winds equal or exceed 58 miles an hour.
During the watch, people should review severe thunderstorm safety rules and be prepared to move a place of safety if threatening weather approaches.