Area Forecast Discussion
Issued by NWS Charleston, WV

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KRLX 182330 AFDRLX Area Forecast Discussion National Weather Service Charleston WV 730 PM EDT Sun Mar 18 2018 .SYNOPSIS... High pressure through Monday. Another system arrives Monday night through mid week. && .NEAR TERM /THROUGH MONDAY/... As of 725 PM Sunday... Tidied up the hourly temps to show a decent drop this evening, given how dry the airmass is. It is looking like northern zones will see quite a bit of sunshine for the first half of the day while southern areas see clouds. In fact, near term models have slowed the onset of rain considerably such that most of the daylight hours tomorrow are largely void of measurable rain. As of 230 PM Sunday High pressure system will keep the area cool and dry through the period. Clear skies and clam winds could allow for radiational cooling, making temperatures to drop around freezing in some places overnight. Continued with some very low end POPs arriving from the south across the eastern mountains during the pre-dawn Monday. && .SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/... As of 320 PM Sunday... Low pressure approaches from the southwest on Monday night. Models differ a bit in the overall details with this system as far as thermal profiles go. Across the Lowlands and Southern Mountains any precip should fall as rain, but in the Northern Mountains things are a bit more complicated. Current thinking is that the mountains will start out as rain, but a transition to a wintry mix or possibly snow will occur during the early morning hours on Tuesday. Have kept snowfall totals very conservative in the mountains for now, as a wintry mix with rain/sleet is forecast. Still have 1 to 2 inches of snow or sleet across higher elevations in Eastern Randolph and Pocahontas County. Low pressure moves off the East Coast and strengthens on Tuesday. Much colder air will work in behind this system as upper trough digs over Eastern U.S. Tuesday night into Wednesday and all precip looks to turn over to snow with some accumulations possible. However, considerable differences still exists between the models and confidence is very low on snowfall totals across the region at this time, but snow is looking more and more likely area-wide Wednesday through Wednesday night. && .LONG TERM /THURSDAY THROUGH SUNDAY/... As of 335 PM Sunday... Ensembles and operational guidance have axis of upper trough shifting to the east on Thursday, but ridging holds off from building into our area until Friday. At least it is looking like a dry end to the week, but expect temperatures to still be below normal on Thursday and possibly Friday as well depending on how quickly the ridge builds. Another system will be possible next weekend, but of course with this coming in day 6 and 7, much is likely to change as we head through the week. Went with a blend of operational and ensemble guidance for days 5 - 7 and this does bring in some Chance PoP next weekend, but due to timing differences between the guidance, this system will probably be more progressive than what the blend of guidance is giving. && .AVIATION /00Z MONDAY THROUGH FRIDAY/... As of 627 PM Sunday... Intervals of cirrus this evening will give way to 4 to 6 kft cloud bases late tonight, primarily across southern terminals. This holds for much of Monday with lowering cigs into MVFR at KBKW, on low level easterly flow. Rain looks to hold off until just beyond the taf period. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 00Z TUESDAY... FORECAST CONFIDENCE: High. ALTERNATE SCENARIOS: None. 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. UTC 1HRLY 22 23 00 01 02 03 04 05 06 07 08 09 EDT 1HRLY 18 19 20 21 22 23 00 01 02 03 04 05 CRW CONSISTENCY H H H H H H H H H H M M HTS CONSISTENCY H H H H H H H H H H M M BKW CONSISTENCY H H H H H H H H H H L L EKN CONSISTENCY H H H H H H H H H H M M PKB CONSISTENCY H H H H H H H H H H M M CKB CONSISTENCY H H H H H H H H H H M M AFTER 00Z TUESDAY... IFR possible in precipitation Monday night into Tuesday. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...None. OH...None. KY...None. VA...None. && $$ SYNOPSIS...ARJ/MPK NEAR TERM...30 SHORT TERM...MPK LONG TERM...MPK AVIATION...30 is the U.S. government's official web portal to all federal, state and local government web resources and services.