


Area Forecast Discussion
Issued by NWS Jackson, MS
Issued by NWS Jackson, MS
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471 FXUS64 KJAN 140810 AFDJAN Area Forecast Discussion National Weather Service Jackson MS 310 AM CDT Mon Jul 14 2025 ...New DISCUSSION... .DISCUSSION... Issued at 310 AM CDT Mon Jul 14 2025 Through Monday night: Latest satellite imagery showed a shortwave trough axis just to the west of our CWA. This trough axis was helping and outflow boundary and a line of convection move into the western most portions of our CWA but, models maintain that high pressure surface and aloft to our southeast will remain dominant over our CWA through Monday. This is expected to lead to more isolated to scattered coverage of mainly afternoon and early evening convection and slightly warmer afternoon highs. The 00Z MON JAN sounding showed a PWAT of 1.88in. Thus, wl maintain a moist airmass across our CWA through Monday night. With the lower rain chances and warmer temperatures topping out in the low to mid 90s, heat stress concerns will increase over our whole CWA. Peak heat index values will be around 105F again Monday. Wl continue to highlight the whole CWA with a "Limited" for heat stress in our graphics. /22/ Tuesday through Saturday... The forecast for the extended period remains on track for the most part with no significant changes made to the overall forecast. Dangerous heat will be the primary focus for the long term period for our entire forecast area beginning on Tuesday with heat index readings in the triple digits. Model consensus from both the GFS and the Euro is still showing the 1020mb sfc high starting to gradually retrograde across the southeast CONUS heading into Tuesday. As this high begins to push north into the region, humid conditions will persist across our CWA, which in turn, will lead to increasing heat conditions through the extended period. Looking at current forecast trends, it appears that heat indices will be in the 106-110 range next Tuesday through Friday given daytime highs forecasted in the mid/upper 90s along with dewpoints in the mid to upper 70s (a few spots could potentially see dewpoints in the low 80s). At this time, no changes have been made to the heat graphic for the Tuesday/Friday timeframe and we will continue to highlight a "Elevated" risk for dangerous heat stress. Heat trends will continue to be monitored as we get through the new work week. If heat trends continue to increase, then a "Significant" risk will be introduce in later updates. Furthermore, heat advisories/warnings will eventually be needed as well. Afternoon/early evening showers and t-storms will provide some relief from the heat. Global guidance shows convection dissipating by the evening hours each day as daytime heating wanes. A low pressure system is expected to move along the Gulf coast by mid- week. As the low pressure traverse the Gulf coast, the National Hurricane Center is monitoring for a low probability (10-30% chance) of tropical development. With PW`s in the 90th percentiles and tropical moisture pushing into the region, a "Slight" risk for excessive rainfall for Thursday and Friday was introduced by WPC. Additional updates will be provided as the timeframe gets closer. Rain chances will linger into Saturday afternoon/evening with higher PoPs (around 50-85%) along and east of I-55. /CR/ && .AVIATION... (06Z TAFS) Issued at 111 AM CDT Mon Jul 14 2025 Persistence continues to be a good forecast with high pressure locked in and centered to our east resulting in moist southwesterly flow over the forecast area. VFR conditions and light southwest surface wind will prevail for the most part through the forecast period. Exceptions will be with a few areas of MVFR/IFR category stratus and BR/FG during the early morning hours, and with brief impacts from diurnally driven TSRA, which will tend to be most enhanced during the mid/late aftn to early evng. /EC/ && .PRELIMINARY POINT TEMPS/POPS... Jackson 94 74 96 75 / 20 10 20 0 Meridian 95 74 97 75 / 20 10 20 10 Vicksburg 94 75 95 76 / 20 10 10 0 Hattiesburg 97 75 98 76 / 30 20 30 10 Natchez 93 74 95 73 / 20 10 20 0 Greenville 92 74 95 76 / 30 20 20 0 Greenwood 93 74 95 76 / 30 10 20 10 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. && $$ 22/CR/EC