Friday, June 12th 2009 Weather Outlook

12 06 2009

Friday’s Weather Outlook; West/Plains/Mississippi Valley System, Southeast System

12:00PM

On Friday, a system will exit the Southeast, while a system slowly work from the West and into the Plains. Showers and storms will be likely over portions of the Mid-Atlantic and Southeast, as a system exits the region. There is a slight risk for severe sotrms in portions of South Carolina, North Carolina, Georiga and Virginia. CAPE values will be around 4000 J/KG, LI’s of -7 and Effective Bulk Shear values up to 35KT. This alogn with the system in the area, will help storms become severe. Severe storms will develop in the Afternoon from Virginia down into South Carolina. These storms will push eastward intot eh Evening, before weakening as diurnal cooling sets in. The main threats from any severe storms will be hail and damaging winds. In the West, a system will slowly push towards the Plains. Showers and storms will be likley over portions of the West, Plains and Mississippi Valley, associated with this system. There is a Moderate risk for severe storms in portions of Oklahoma, Arkansas, Tennesse, Mississippi, Alabama and Missouri. With a slight risk for severe storms in portions of Texas and Oklahoma. An MCS will be ongoing in the Morning across Northeast Oklahoma, this complex will transition into a derecho. This complex will race east-southeast through the day, with an enhanced threat of widespread damaging winds. Ahead of this complex, CAPE vlaues iwll be around 4000 J/KG with LI’s of -10. This will likely help sustain this complex into the Evening, as it reaches Alabama and Georiga. Across the dry line in Texas and Southern Oklahoma. CAPE values will be around 7500 J/KG, LI’s of -13 and Effective Bulk Shear values up to 50KT. This along witht he system in the area, will help storms become severe. Severe storms will develop in the Afternoon from Southern Oklahoma into Texas. These storms will push eastward into the Night, before weakening. The main threats from any severe storms will be damaging winds, hail and an isolated tornado. Across portions of Colorado, with limited instibility, a few storms may bceom severe. With the main threats being hail and damging winds. Below is the severe weather outlook for Friday.

sev 530

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