National Forecast Update at 8:10pm Saturday, 3-27-04

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National Forecast Update at 8:10pm Saturday, 3-27-04
Amateur Meteorologist
Barometer Bob Brookens
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Beginning Sunday Morning, we will have rain stretched from Oklahoma north through the plains as low pressure moves into Canada during the day. High Pressure is anchored over the Florida Panhandle, and extends west into Louisiana, and down into the tropics. As the low slowly moves east and northeast into Southern Canada, the moisture flow from the Gulf of Mexico increases with the combined effort of the High Pressure and the frontal boundry that will extend from Oklahome/Arkansas. This front just doesn't move much in the south till overnight Monday into Tuesday morning. This means rains and some isolated thunderstorms along this trough from the Great Lakes, south to the Gulf Coastal States. As of the posting of this update, there are numerous tornado watches and warnings across Oklahoma and South-Central Kansas. We can expect to see this activity weaken some, but the potential for thunderstorms and a slight chance for isolated tornados is possible through the day Sunday, especially in the afternoon and evening hours, from Northern Louisiana through east and south-central Texas.
On Monday, the rains are still soaking Texas, Louisiana, up through the Mississippi River Valley into the Great Lakes. This trough will slowly move eastward. This will bring rains through the day, and will be moving into the Ohio River Valley during the day. We will begin to see a secondary low develop along the frontal boundry late Monday, and this will amplify the rain potentials over Ohio into Tuesday and Wednesday. This low will drag some cold temps down from Canada, and we could see a rain change over to snow in some areas of the Midwest, Tuesday night and early Wednesday.
Elsewhere, it remains rather seasonable, but cools off across the Plains, but this is short lived mainly to the morning hours, and with another developing low pressure over the Central Rockies, the warm moist air will be on the increase through the second portion of the week for the Plains States. In the West cool or cold at night, and warm during the day across the Southwest, and California remains just about perfect.