13 AUGUST 2010 EXTENDED FORECAST

13 AUGUST 2010 EXTENDED FORECAST

A STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL BRING STRONG TO SEVERE THUNDERSTORMS BY THIS AFTERNOON AND INTO THE EVENING HOURS. STORMS WILL DEVELOP OVER WEST AND NW IOWA AND SPREAD HEAVY RAINS SOUTHEAST LATE THIS AFTERNOON. HIGH PRESSURE WILL BUILD INTO IOWA SATURDAY AFTERNOON AND BRING COOLER TEMPERATURES WITH DRY CONDITIONS.


FRIDAY 13TH - PARTLY TO MOSTLY CLOUDY WITH TSTORMS DEVLOPING BETWEEN 1 AND 3PM AND LASTING INTO OVERNITE (POSSIBLY SEVERE STORMS AFTER 6PM - HEAVY RAIN 2 INCHES) - HUMID/TEMP 92

SATURDAY 14TH - TSHOWERS ENDING EARLY MORNING - THEN PARTLY TO MOSTLY CLOUDY THRU AFTERNOON AND EVENING - ISOLATED RAINSHOWERS REDEVELOP BY 8PM ALONG THE I-80 CORRIDOR AND END OVERNITE - TEMP 88 - NW WIND 10-20MPH

SUNDAY 15TH - PARTLY CLOUDY - TEMP LOW 80'S

MONDAY/TUESDAY 16TH/17THTH - PARTLY CLOUDY - THEN MOSTLY CLOUDY WITH TSHOWERS TUESDAY - TEMPS NEAR 80

WEDNESDAY THRU FRIDAY 18TH THRU 20TH - PARTLY CLOUDY - TEMPS MID/HIGH 80'S

On this day in Iowa weather history...

1964: An area of high pressure moved across Iowa on August 13-14 bringing clear skies and light winds that allowed temperatures to plummet across portions of the state two nights in a row, resulting in record lows at many locations. On the morning of the 13th reported low temperatures included 38 F at Bedford, Independence, Le Mars, and Sibley, 37 F at Cherokee, Ida Grove, and Oelwein, and 36 F at Carroll and Storm Lake.

1911: Severe flooding occurred along the Upper Iowa River in far northeastern Iowa on August 13-14. The flooding was caused by two heavy rain events, the first affecting the entire river basin on the 13th and the second affecting northern portions of the basin in far southeastern Minnesota overnight into the 14th. On the 13th reported rainfall amounts included 3.26 inches at Decorah, 2.41 inches at Ridgeway, and 2.20 inches at Elma. The Decorah Republican newspaper reported that "bridges, houses, barns, farm animals and grain are wrecked, burned, killed, or washed away." A postmaster at New Albin wrote that "crops are damaged through the valley very materially" and that "no lives were lost, but horses, cattle, and hogs were swept down the stream." Several bridges were also reported washed out by the floods.
WEATHER FACTS........

YOU THINK IT'S HOT NOW? The summer of 1995 was so hot that at the end of August, methane emitted within big hay bales of freshly-cut hay in Missouri began spontaneously combusting.

"RED SKY IN THE MORNING - SAILOR TAKE WARNING. RED SKY AT NIGHT - SAILORS DELIGHT". What causes a red sun? The red or orange color of the rising or setting sun is caused by the increased distance through our atmosphere its rays must pass before reaching our eyes. Our thick impurity-laden lower atmosphere only allows the red tones to pass through it. As the sun rises higher in the sky, its light passes through a shorter distance of thick atmosphere. It loses its redder tone and takes on its characteristic yellow color.