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Short Range Public Discussion
(Caution: Version displayed is not the latest version. - Issued 0734Z Jul 19, 2019)
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Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 334 AM EDT Fri Jul 19 2019 Valid 12Z Fri Jul 19 2019 - 12Z Sun Jul 21 2019 ...A dangerous heat wave is building in the Central and Eastern U.S.... ...There is a slight to enhanced risk of severer thunderstorms over parts of the Upper Mississippi Valley into the Upper Great Lakes... ...There is a slight risk of excessive rainfall over parts of the Upper Mississippi Valley into the Upper Great Lakes... An upper-level ridge extending from parts of California eastward to the East Coast will continue as the southern edge of the Westerlies extends across the northern tier of the lower 48 states through Sunday. Excessive Heat Warnings and Heat Advisories extend from parts of the Central Plains eastward to the Northeast and southward to the Southern Mid-Atlantic. The potential for record high temperatures will extend from parts of the Mid-Atlantic into parts of the Ohio Valley on Saturday. In addition, the potential for record high low temperatures will extend from parts of the Middle Mississippi Valley into the Great Lakes/Ohio Valley and into the Mid-Atlantic, also on Saturday. Severe thunderstorms with potential excessive rainfall will develop along a front extending from the Upper Great Lakes roughly westward to Northern Plains. The boundary will slowly sage southward stretching from Northern Maine across the Lower Great Lakes into the Middle Mississippi Valley and the Central Plains by Sunday. Tropical moisture and weak upper-level impulses will aid in producing showers and thunderstorms over parts of the Southern Mid-Atlantic to the Southeast and the Southern Ohio and Tennessee Valleys a long with the Central Gulf Coast with the greats areal coverage during the late afternoon into the late evening on Friday into Saturday. Overnight Saturday, showers and thunderstorms will develop over parts of the Central and Southern High Plains. Ziegenfelder Graphics available at