515 FXUS61 KRLX 220021 AFDRLXAREA FORECAST DISCUSSION National Weather Service Charleston WV 821 PM EDT Sun Sep 21 2025
.SYNOPSIS... Scattered showers and storms this evening into tonight via a crossing shortwave. The chance of showers and storms increases during the new work week as multiple upper disturbances affect the area.
&&
.NEAR TERM /THROUGH MONDAY/... As of 627 PM Sunday...
Have increased PoPs over the next few hours across southeast Ohio and the lowlands of WV to correlate with a line of scattered showers and thunderstorms that have developed via a weak crossing shortwave. Gusty winds and locally heavy rain remain the main threats, with isolated strong gusts possible, primarily across southeast Ohio and the northern lowlands of WV. The rest of the forecast remains on track.
As of 127 PM Sunday...
Frontal boundary stalled across the area will slowly move north throughout the day today, with flow turning more southerly and an uptick in the humidity/dew points expected. Dew points should rise to the lower to possibly mid 60s in spots. A shortwave crossing the area will help to generate more showers and storms, with best chances looking to be across SE Ohio/Mid Ohio Valley and NE KY zones. Increasing deep layer shear and instability, will lead to the potential for storms to become organized, with a damaging wind and possible hail threat. SPC has added a marginal risk, mainly just to the west of the area, but it does clip our SE Ohio and NE KY zones.
Monday will continue to be active across the area with a humid air mass in place as area remains in the warm sector of low pressure across the Great Lakes region. Showers and storms will be on the increase, particularly in the afternoon and evening hours. Storms will contain brief heavy downpours as PW values surge well above seasonal norms. Isolated strong to severe storms will also be possible on Monday, with ample instability and shear on the order of 30-40 kts. Damaging winds will be the primary hazard with any convection on Monday.
&&
.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/... As of 127 PM Sunday...
Tuesday will continue to be active across the area as low pressure skirts across the Great Lakes/Canada, and multiple shortwaves continue to traverse the area. An isolated strong to severe storm will also be possible on Tuesday, although chances look to be somewhat low at this point. Wednesday looks to continue to be very active across the area as low pressure across the midwest starts to organize, eventually carving out a deep trough to our west.
&&
.LONG TERM /THURSDAY THROUGH SUNDAY/... As of 128 PM Sunday...
Active weather continues Thursday onward as a developing low pressure system takes hold across the central U.S. and gradually makes its way eastward towards the area. This will result in not only showery/stormy conditions, but cooler conditions across the area as it carves out a trough across the region.
&&
.AVIATION /00Z MONDAY THROUGH FRIDAY/... As of 800 PM Sunday...
Scattered showers and isolated thunderstorms continue to slowly progress eastward across the forecast area, with most of the activity dissipating/exiting by ~4Z. Thereafter, only ISOLD showers and perhaps a storm are two are expected, primarily across SE OH, NE KY, and the northern WV lowlands. Brief MVFR/IFR VSBY is possible with any heavier showers or storms. Otherwise, VFR persists across the area tonight, with the only other concern being the potential for MVFR/IFR stratus on the eastern slopes of the northeast mountains, and MVFR/IFR VSBY with fog at EKN. Given low confidence in fog formation there, have kept restrictions limited to MVFR for the time being.
A mainly dry start on Monday will transition to an increasing chance for SCT showers/storms during the afternoon/evening, particularly across the Mid-Ohio Valley and northern WV lowlands, although an ISOLD shower/storm could occur just about anywhere. Brief MVFR/IFR VSBY is possible with any heavier showers or storms.
Calm or light SSE flow is expected tonight, with light SW flow on Monday. Strong, gusty winds within thunderstorms cannot be ruled out late in the TAF period given some strong storm potential later on Monday.
FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 00Z TUESDAY...
FORECAST CONFIDENCE: Medium.
ALTERNATE SCENARIOS: Brief MVFR/IFR VSBY is possible with any heavier showers or storms tonight and once again later on Monday. Flight restrictions at EKN later tonight may be worse than currently forecast.
EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY OF WFO FORECAST TO AVAILABLE MODEL INFORMATION: H = HIGH: TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS. L = LOW: TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.
DATE MON 09/22/25 UTC 1HRLY 00 01 02 03 04 05 06 07 08 09 10 11 EDT 1HRLY 20 21 22 23 00 01 02 03 04 05 06 07 CRW CONSISTENCY H H H H H H H H H H H H HTS CONSISTENCY H H H H H H H H H H H H BKW CONSISTENCY H H H H H H H H H H H H EKN CONSISTENCY H H H H H H H M M L M M PKB CONSISTENCY H H H H H H H H H H H H CKB CONSISTENCY H H H H H H H H H H H H
AFTER 00Z TUESDAY... Brief periods of IFR conditions are possible with heavier showers or thunderstorms throughout the week. IFR is also possible at night with low stratus and/or fog.
&&
.RLX WATCHES/WARNINGS/ADVISORIES... WV...None. OH...None. KY...None. VA...None.
&&
$$
SYNOPSIS...SL/GW NEAR TERM...SL/GW SHORT TERM...SL LONG TERM...SL AVIATION...GW
NWS RLX Office Area Forecast Discussion