Meteorological events that happened on August 11th:
The "Dog Days" officially come to an end on this date, having begun the third day in July. Superstition has it that dogs tend to become mad during that time of the year.
A violent hurricane devastated the island of Barbados. Death toll was estimated to be from 1,500 to 2,500.
The high of 107° at Northwest River in Newfoundland, Canada established the record temperature for the province.
The shade temperature reached 136.4° at San Luis, Mexico, to, at that time, unofficially share the world record with Aziziyah, Lybia.
The warmest August temperature ever recorded in both Oklahoma City and Wichita Falls occurred on this date. The morning low in Oklahoma City was a warm 82°, before both cities warmed up to a very hot 113°. The old August record in Oklahoma City was 112, which was set the day before. In Wichita Falls, this record was tied on 8/6/1964.
A major hurricane struck Savannah, GA and Charleston, SC causing the worst inland flooding since 1607.
An intense short-duration storm occurred in the lower Muddy River Basin in southern Nevada resulting in the largest, estimated peak flow known on the California Wash and the lower Muddy River. The flood severely damaged the town of Overton and also damaged agricultural and railroad property. Peak discharges were estimated at 10,000 cubic feet per second in California Wash near mouth, and at 12,000 cubic feet per second in the Muddy River channel in the lower Moapa Valley.
The temperature reached 101° at Burlington, VT to establish their all-time record high.
A young girl in a lake was injured when a dust devil near Bristol, CT carried a 150 pound roof covering a picnic area into a lake.
A line of heavy thunderstorms moved rapidly across portions of eastern South Dakota and into Iowa. Wind gusts associated with these storms reached 70 mph in many areas. In Canton, winds were estimated at 70 mph while the National Weather Service in Sioux Falls was belted with a 69 mph gust. The high winds leveled many trees and also destroyed some older buildings in Miner County while the Sioux Falls area had only tree damage and minor building damage.
The storms maintained their strength as they moved into northwest Iowa. An uncompleted trucking terminal and several trucks received around $10,000 dollars in damage in Sac County while a grain storage bin was flattened and boat house destroyed near Storm Lake.
The mercury was plummeting over portions of the Arrowhead of Minnesota. The temperature at Embarrass, MN fell to 28°, accompanied by a hard freeze.
The Democratic National Convention at Madison Square Garden could not drown out a major thunderstorm affecting the New York City area. 70 mph winds and major lightning knocked out power to over 30,000 people.
Clouds and moisture from Hurricane Allen provided a brief break from the torrid Texas heat wave, with daily highs mostly in the 70s and 80s.
Miami, FL set a record high for the date with 96°. Then a thunderstorm cools things off to 70°, which set a record low for the date.
Lightning set off 11 fires in the Cheyenne River Indian Reservation area. 20 acres of grassland were burned two miles northeast of Bear Creek. About 600 acres of grassland were burned 8 miles southwest of Lantry. About 3,000 acres of grassland burned near Eagle Butte.
Atlanta, GA saw its streak of 38 consecutive days with 90 degrees or hotter finally come to an end with a reading of 89°.
An early evening thunderstorm in Wyoming produced hail up to 2 inches in diameter from Alva to Hulett. Snowplows had to be used to clear Highway 24 south of Hulett, where hail formed drifts two feet deep.
Moisture from the remnants of Tropical Storm Beryl resulted in torrential rains across eastern Texas. 12.50 inches of rain deluged Enterprise, TX, which was more than the amount received there during the previous eight months.
Philadelphia, PA reported a record 44 days of 90 degree weather for the year. Baltimore, MD and Newark, NJ reported a record 14 straight days of 90 degree heat.
One of the most severe convective outbreaks on record came to a climax in southern California after four days. Thunderstorms deluged Benton, CA with 6 inches of rain two days in a row, and the flooding which resulted caused more than a million dollars damage to homes and highways.
Thunderstorms around Yellowstone Park, WY produced 4 inches of rain in 20 minutes resulting in 15 mudslides.
Rainfall up to 4.5 inches produced flooding in Scottsbluff, NE. The heavy rains collapsed the roof of a business and flooded some streets with up to three feet of water. Thunderstorms over Long Island, NY drenched Suffolk County with 8 to 10 inches of rain.
Many cities in the southeastern U.S. reported record low temperatures for the date. It was, for some cities, the fourth straight morning of record cold temperatures. Records included: Oak Ridge, TN: 52°, Asheville, NC: 53°, Fort Smith, AR: 58°, Greenville-Spartanburg, SC: 58°, Athens, GA: 60°, Shreveport, LA: 61°, Savannah, GA: 64°, Lake Charles, LA: 66°, Jacksonville, FL: 68°, and Tampa, FL: 70°.
An unusual high elevation tornado in the Ashley National Forest of Utah produced a path 17 miles long and as much as a half mile wide. The storm attained F3 intensity, destroying 1,000 acres of trees. The highest elevation damage was observed at 10,800 feet.
A cloudy, rainy day across southern Michigan resulted in a new lowest daily maximum temperature at Lansing, MI and tied a record at Grand Rapids, MI. The high temperature at Lansing was just 64°. At Grand Rapids, the high of 64° tied the previous low maximum set back in 1902.
A rare Utah tornado struck the downtown area of Salt Lake City, UT during the lunch hour, leaving one person dead and over 100 injured. The fatality was the first tornado death in Utah in recorded history. The tornado, rated an F2, caused extensive damage to a convention tent adjacent to the Salt Palace, a Wyndham hotel and the Delta Center. Only four F2 tornadoes have been recorded in Utah history.
1999 was a memorable year for tornadoes since four major metropolitan areas were struck, including Oklahoma City, OK, Little Rock, AR, Cincinnati, OH and Salt Lake City, UT.
The National Weather Service at North Platte, NE reported huge 7 inch hail three miles east of Halsey, NE.
Turin, Italy hit 107°, their hottest day in over the 250 years of record keeping.
Grono, Switzerland recorded their hottest day on record as the temperature reached 106.7°.
A cold air mass descended over Wisconsin. Several cities reported record low maximum temperatures that are among the coldest ever for the month. Three broke old records and two tied records for record low maximum temperatures. High temperatures ranged from 52° in the north to 59° in southern part of the state.
In Michigan, cool and cloudy weather was observed with high temperatures only in the 60s. Record low maximum temperatures occur at Muskegon with 61°, Grand Rapids with 63° and 64° at Lansing.
Reykjavík, Iceland reached 76.6°, their hottest day ever recorded in the city where records have been kept since the 19th century.
Dutch Harbor, AK set their all-time high temperature with a reading of 81°.
Dallas, TX saw their string of consecutive days with high temperatures at 100° or above ends at 40 when the mercury only reached 97°.
Across eastern Pakistan, Mithi, Tharparkar and Badin recorded daily rainfall records as rainfall totaled 14.8 inches, 8.5 inches and 5.7 inches respectively. Six deaths are reported due to flooding. Over a three-day period from 8/10 through 8/12, Mithi received 17 inches of rain.
Former Atlantic hurricane Ernesto transformed to Tropical Storm Hector in the eastern Pacific. Although Mexico's mountainous terrain forced Ernesto to weaken, it destroyed the once-deadly storm. Remnants of Ernesto redeveloped into a tropical depression over the warm waters of the eastern Pacific Ocean west of Manzanillo, Mexico. Further strengthening resulted in the depression given the eastern Pacific name of "Hector."
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