textproduct: Jackson

KEY MESSAGES

- Showers and storms remain possible in areas mainly west of the I-75 corridor this afternoon.

- Temperatures will average within a few degrees of normal over the next week.

- After a lull for most of the week, shower and storm chances return for the upcoming weekend.

UPDATE

Issued at 855 AM EDT MON JUN 1 2026

Lewis and Mason county mesonet stations had measurable precip early this morning. In lieu of sprinkles, have added 20% POP for the radar returns which are progressing southeast through the northeastern portion of the forecast area.

UPDATE Issued at 720 AM EDT MON JUN 1 2026

No significant changes were made to the forecast with mainly just the inclusion of the latest obs and trends for the T/Td/Sky grids. Did fine tune the PoPs in the near term for ongoing very light showers and sprinkles in the northern parts of the CWA. This area of pcpn should dry up over the next hour or so. These minor adjustments have been sent to the NDFD and web servers along with a freshening of the zones.

LONG TERM

(Tuesday night through Sunday) Issued at 425 AM EDT MON JUN 1 2026

The main change to the start of the extended forecast this morning was to add in more terrain details each night on account of a dry and mostly clear air mass in place. Did also include a healthy amount of valley fog each night given this current wx regime. Ridging aloft still looks to keep things dry and quiet through the end of the work week before return flow moisture kicks up convection chances for Saturday and Sunday.

A version of the previous long term discussion follows:

Tuesday, high pressure over the Upper Midwest strengthens as the trough axis from the upper low in the Northeast continues to drop heights across the area. Slightly cooler than normal conditions are on tap - ranging from the mid to upper 70s. The weather will generally be dry with mostly sunny skies across the area except for the Big Sandy basin, where the retrograding upper low could produce isolated showers and thunderstorms during the afternoon. As high pressure settles southeast into the area, height rises follow, helping to lead to clear skies, calm winds and dry weather starting Tuesday night. Valleys will probably decouple heading into the evening sending valley temperatures down into the upper 40s; while ridge tops remain elevated in the low to mid 50s. Patchy will likely develop that night, mostly in river valleys, but not necessarily confined to them.

High pressure continues to build into the region Wednesday through Friday. During this time, dry weather can be expected, amid light winds and mostly sunny skies. With the height rises aloft, temperatures will tick higher through Friday. As such, highs in the upper 70s on Wednesday will reach the low to mid 80s by Friday. Lows each night will trend milder, as well, from the low to mid 50s Wednesday night to the upper 50s and low 60s both Thursday and Friday nights.

An upper level low traverses the Northern Plains and Southern Canada through mid-week. By late Thursday, this upper low will be over the Great Lakes, breaking the ridge down. Gulf moisture then creeps north around an area of sfc high pressure residing over the lower Mississippi Valley, reaching the Mid-Mississippi Valley by Saturday afternoon. This will result in a return of showers and thunderstorm chances across much of the region that afternoon through Sunday. High temperatures look to range from the low to mid 80s during this time.

AVIATION

(For the 12Z TAFS through 12Z Tuesday morning) ISSUED AT 750 AM EDT MON JUN 1 2026

An approaching wave aloft interacting with a sfc boundary lingering across the region is resulting in isolated to scattered very light showers early this morning north of the Mountain Parkway - with some sprinkles possible for the rest of the area. The convective potential then returns to the far southwest parts of the aviation forecast area for the afternoon with a stray thunderstorm possible. Otherwise, any areas of valley fog will clear out this morning but then redevelop later tonight - all not expected to impact any TAF terminal. Winds will generally remain less than 10 kts through the period, outside of any isolated thunderstorm.

JKL WATCHES/WARNINGS/ADVISORIES

None.