Weather Extremes For Sunday

WEATHER EXTREMES FOR SUNDAY: HIGHEST TEMPERATURE (DEGREES F)...........109 Needles, CA HIGHEST HEAT INDEX (DEGREES F)............114 Imperial, CA LOWEST TEMPERATURE (DEGREES

Monday, August 20th 2007, 4:22 am

By: News On 6

WEATHER EXTREMES FOR SUNDAY:

HIGHEST TEMPERATURE (DEGREES F)...........109 Needles, CA

HIGHEST HEAT INDEX (DEGREES F)............114 Imperial, CA

LOWEST TEMPERATURE (DEGREES F).............31 Stanley, ID

LOWEST WIND CHILL (DEGREES F)..............31 Stanley, ID

HIGHEST WIND GUST (MPH)....................82 Watonga, OK

HIGHEST PRECIPITATION (INCHES)...........6.02 El Reno, OK

NATIONAL WEATHER SUMMARY:

In the East, a stalled out frontal boundary triggered widespread showers and thunderstorms across the Great Lakes region, Ohio Valley, the northern Middle Atlantic, and the upper Mississippi Valley, under otherwise partly to mostly cloudy skies. No severe weather accompanied this activity, but heavy rainfall caused numerous areas flooding across Illinois, Iowa, and Wisconsin, where up to three inches of rain was reported. Further south, a few isolated showers and thunderstorms developed across the Deep South late this afternoon, dissipating shortly after sunset. Elsewhere, dry conditions continued under variably cloudy skies in the Northeast, Tennessee Valley, Appalachians, much of the Southeast, and the Carolinas.

Across the western two-thirds of the nation, subtropical moisture across the southern Plains merged with a stalled out frontal boundary across the middle Mississippi Valley, producing areas of heavy rain and gusty winds. Rainfall totals of two to three inches, with locally higher amounts, were reported in these areas. Flash flooding and areal flooding became a major threat by the early evening hours across Oklahoma and Missouri. Further north, skies cleared across much of the northern and central Plains this afternoon ahead of an approaching low pressure system. To the west, a developing low pressure system generated widespread showers and thunderstorms over the northern Rockies and portions of the northern Great Basin. A few strong thunderstorms produced wind gusts in excess of 60 miles per hour, and periods of brief, heavy rainfall. Elsewhere, a few isolated thunderstorms developed across the Desert Southwest in association with daytime heating; but otherwise, clear to partly cloudy skies and dry conditions prevailed across the Pacific Northwest, the Great Basin, the western Rockies, California, and the majority of the Desert Southwest.

ON THIS DATE IN HISTORY:

In 1886, the town of Indianola, Texas was completely destroyed by a hurricane. The town was abandoned and never rebuilt.

In 1969, the remnants of Hurricane Camille moved through the Middle Atlantic States, dumping 27 inches of rain in 8 hours in Nelson County, Virginia. Disastrous flooding across the James River caused 153 fatalities in Virginia alone. Weather tales of the event, tell of birds drowning while perched on tree branches.

In 1989, six inches of rain fell in and around Tulsa, Oklahoma causing major flooding in the area.

FRONTS ACROSS THE NATION

A stationary front stretches from northern Virginia into West Virginia, Ohio, Indiana, Illinois, Iowa, northern Nebraska, northeastern Wyoming, and into Montana.

A cold front spans across western Montana, Idaho, northwestern Utah, and into Nevada.

NATIONAL WEATHER FORECAST

In the East, an upper-level disturbance will produce scattered showers and thunderstorms across the Great Lakes region, the Ohio Valley, and southern portions of the Northeast. There will be a chance for strong to severe thunderstorms, capable of producing frequent lightning, strong winds, sizable hail, and heavy downpours. Rainfall amounts of one to three inches will be possible and may lead to areas of flooding. Elsewhere, partly cloudy skies with the chance for afternoon and evening showers and thunderstorms can be expected across the Tennessee Valley and the Southeast. A few strong thunderstorms will be possible, along with rainfall amounts of around a quarter of an inch. Otherwise, fair skies and dry conditions will prevail. High temperatures will reach into the upper 60s to the lower 80s across the Great Lakes region, the Ohio Valley, and the Northeast; and into the upper 80s and 90s through the Tennessee Valley, the Mid-Atlantic region, the Southeast, and Florida.

Across the central part of the country, a low pressure system will continue to produce showers and strong to severe thunderstorms across the northern Plains, and the Upper and Middle Mississippi Valley. Frequent lightning, strong winds, large hail, isolated tornadoes, and heavy downpours may accompany the strongest thunderstorms. Rainfall amounts of one to three inches will be possible and may lead to areas of flooding. Elsewhere, partly cloudy skies with the chance for afternoon and evening showers and thunderstorms can be expected throughout the central and southern Plains, and the Lower Mississippi Valley. No severe weather is expected and rainfall amounts should remain light. High temperatures will reach into the upper 60s to the 80s across the northern Plains, and the Upper and Middle Mississippi Valley; and into the upper 80s to near 100 through the central and southern Plains, and the Lower Mississippi Valley.

In the West, partly cloudy skies with the chance for afternoon and evening showers and thunderstorms can be expected across the Desert Southwest. No severe weather is expected and rainfall amounts should remain light. Elsewhere, mostly cloudy skies and scattered rain showers will likely affect the Pacific Northwest as the next system moves through. Rainfall amounts of up to a quarter of an inch will be possible. Otherwise, high pressure will allow for fair skies and dry conditions through the high Plains, the Rocky Mountains, the Great Basin, and much of California. High temperatures will reach into the 60s and 70s along the coastal regions of California, and across the Pacific Northwest, the northern Rocky Mountains, and the northern high Plains; and into the 80s to the lower 100s through the central and southern high Plains, the central and southern Rocky Mountains, the Desert Southwest, the Great Basin, and much of California.

Prepared by WeatherBank, Inc.