Area Forecast Discussion
Issued by NWS Jackson, MS
Issued by NWS Jackson, MS
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316 FXUS64 KJAN 111504 AFDJAN Area Forecast Discussion National Weather Service Jackson MS 1004 AM CDT Thu Jul 11 2024 ...New MESOSCALE UPDATE... .MESOSCALE UPDATE... Issued at 934 AM CDT Thu Jul 11 2024 The forecast remains on track thus no major updates were made to the forecast package. Morning surface analysis indicates a 1017mb surface high across the ArkLaMiss region leading to dry conditions and light northerly flow. A stalled boundary near the Gulf Coast is poised to begin lifting north today causing isolated to scattered pops generally across the Hwy-84 corridor. High temperatures are expected to warm into the mid 90s with portions of the southeast having the potential to warm a few degrees warmer./KP/ && .DISCUSSION... Issued at 415 AM CDT Thu Jul 11 2024 Today and Tonight: Our CWA will remain between mid level troughing to the north and mid level ridging to the south. Early morning surface analysis had a 1017mb high centered over northern Mississippi and a stalled boundary just south of our southeast most zones. Together these features will allow temperatures to top out a degree or two warmer than on Wednesday and keep most of our CWA dry. The exception will be in our south, generally along and south of Highway 84 where isolated to scattered showers and thunderstorms will be possible this afternoon. Some of the convection may continue into early evening before dissipating. Temperatures this afternoon will top out a degree or two warmer than normal and tonight bottom out close to normal. /22/ Friday through mid next week... Temperatures and dewpoints will gradually increase this weekend as upper ridging and corresponding surface high build into the area. Temps aloft will increase into the low 20s C, which should result in surface temps in the upper 90s, with a few 100s in some spots. Highest temperatures appear concentrated along the HWY 82, where a drier airmass should allow for deeper mixing. A heat advisory will likely be needed eventually for this weekend with heat indices of 105-110. As high pressure shifts east early next week, Gulf moisture will creep northward. As dewpoints increase Monday-Wednesday, heat indices increase to 110+. Excessive heat warnings will likely be needed for portions of the area early next week, especially in the Delta where dewpoints appear to hold in the mid 70s longer. With greater moisture, afternoon convection chances should become more numerous. Still, heat will likely be an issue prior to convective initiation. This regime will likely persist through the period./SAS/ && .AVIATION... (12Z TAFS) Issued at 641 AM CDT Thu Jul 11 2024 LIFR conditions wl prevail in the se through 13Z before improving. TSRA wl be psbl at HBG-PIB 19-23Z. Otherwise, by 14Z VFR conditions and a light wind will prevail through the end of the TAF period. /22/ && .PRELIMINARY POINT TEMPS/POPS... Jackson 93 73 96 75 / 10 0 20 0 Meridian 95 72 98 73 / 10 10 10 0 Vicksburg 94 72 96 74 / 0 0 10 0 Hattiesburg 95 74 97 75 / 20 20 40 10 Natchez 92 73 94 75 / 20 10 30 10 Greenville 93 71 96 74 / 0 0 0 0 Greenwood 94 72 97 74 / 0 0 0 0 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. && $$ KP/SAS20/22