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Area Forecast Discussion
Issued by NWS Paducah, KY
Issued by NWS Paducah, KY
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838 FXUS63 KPAH 172022 AFDPAH Area Forecast Discussion National Weather Service Paducah KY 322 PM CDT Wed Jul 17 2024 .KEY MESSAGES... - Isolated to scattered showers and thunderstorms will continue along and ahead of the cold front this afternoon and early this evening. - A cooler and much less humid air mass will take hold from Thursday through early next week. - A small chance of thunderstorms returns Sunday and increases through Tuesday. At this time, severe storms and widespread heavy rainfall are not anticipated. && .DISCUSSION... Issued at 322 PM CDT Wed Jul 17 2024 A broken band of showers with an occasional lightning strike has developed along the cold from near Murphysboro to near Carmi Illinois. We have gotten some funnel clouds pictures/reports from under some of them. While the images look more like a cold air funnel hanging from a cloud base, the environment (combination of surface vertical vorticity along the boundary and 0-3km CAPE over a 100 J/kg) looks reasonably ripe for land spouts. There is no rotation noted on radar with the cells. Either way, the threat to life and property is very low and a Special Weather Statement has been issued to address the possibilities. The front and any remaining thunderstorms should push south of the area by around sunset. A few showers may linger behind the front in the far southeast into the overnight hours, but it should be dry throughout the region by sunrise Thursday. Dry and cool surface high pressure will then dominate the region through the weekend and into next week. Aloft we will remain in the base of a trough aloft, but more energy will eventually drop into the central Plains and refocus the troughiness to our west over the weekend. Temperatures will be several degrees below normal Thursday and Friday and then gradually trend upward through the weekend. However, the current forecast keeps temperatures below normal through next Wednesday. The initially very dry airmass will slowly modify beginning over the weekend, as winds remain north or northeast. The NBM brings some small chance PoPs back to the region Sunday, as dewpoints climb back into the upper 60s. A weak inverted surface trough tries to develop over west Kentucky Monday, and that will help dewpoints climb near 70. The increased low-level moisture, presence of a surface boundary, and the general troughing aloft would support at least some small chance PoPs on Monday. By Tuesday the Quad State should be under southwest flow aloft and there is the possibility of a warm front lifting northeast through the region. Dewpoints will climb above 70, so Tuesday should be the best chance of convection. As a result the NBM PoPs climb into likely territory. Next Wednesday will be similar to Tuesday minus the warm front, so there should be a good chance of diurnal convection across the Quad State. Wind fields will remain weak, so organized severe storms are not expected through the first half of next week. && .AVIATION /18Z TAFS THROUGH 18Z THURSDAY/... Issued at 1230 PM CDT Wed Jul 17 2024 A cold front has already passed KMVN and will pass through the remaining TAF sites by 00Z. Ahead of it, MVFR ceilings and scattered to numerous SHRA/TSRA are expected. North winds under 10kts and clearing skies are expected behind the front this evening through Thursday morning. && .PAH WATCHES/WARNINGS/ADVISORIES... IL...None. MO...None. IN...None. KY...None. && $$ DISCUSSION...DRS AVIATION...DRS