Area Forecast Discussion
Issued by NWS Wilmington, OH

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
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
862 FXUS61 KILN 211547 AFDILN Area Forecast Discussion National Weather Service Wilmington OH 1047 AM EST Wed Feb 21 2018 .SYNOPSIS... A cold front has pushed across the area this morning with cooler temperatures and showers working into the area. Low pressure tracking just south of the region tonight into Thursday will result in more widespread precipitation. Unsettled conditions will remain into the weekend as additional weather systems pass through the region. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... The weak convective line with the cold front is almost out of the area with light stratiform precipitation on the back side of the front. The light precipitation will continue to fizzle this afternoon as the cold front washes out and upper level support remains off to our north and west. This evening a broad shield of precipitation will spread over the region thanks to another upper level disturbance traversing the area. Several rounds of precipitation Thursday morning will lead to the potential for some flooding issues thanks to over one inch of rainfall across our southwestern zones. Prev Discussion-> Convective line continues across the forecast area. Although reflectivity structure has diminished, there have still been some observations with gusts up to 35 kt. Given current trends, this line should exit the forecast area within the next few hours. Second area of showers across Indiana will follow but should diminish going through the morning and decrease quite a bit in the afternoon. Gust front associated with the showers is dropping temperatures back into the 50s. Sharper decrease in temperatures will come as a cold front just entering the forecast area moves through this morning. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/... Appears that there will be a minimum in precipitation early in the evening, but this will not last long. A wave along the front that passes through the area today will track just south of the region tonight into Thursday. This will cause a large shield of rain to spread over the entire forecast area tonight and then push off to the east on Thursday. Looks like there could be a little more substantial rainfall with this system, particularly across southern counties. So there could be some minor flood issues. The other concern is that temperatures north of I-70 will likely fall to or just below freezing. This would result in a period of freezing rain. Still a degree of uncertainty with the temperature forecast. Also, it is not clear how much impact this would have on roads. At this point will just continue to highlight in the HWO. Forecast lows are a multi-model blend while highs leaned towards cooler guidance. && .LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/... An active weather pattern will be in place from Thursday night through Saturday night. Multiple rounds of rain will move through the region. One round will move through Thursday night into Friday. Another round will move through late Friday night through the day on Saturday. Finally the front will move through Saturday night bringing yet another round of rain to the area. Dry conditions will finally move in for the day on Sunday and remain in place for the remainder of the long term period. The multiple rounds of moderate to possibly heavy rainfall at times will lead to rises on area creeks and streams along with the potential for flooding. Will continue this mention in the HWO. There is some instability during the day southeast of Interstate 71 on Friday and therefore went with a chance of thunder during this time. Additional thunder chances will be possible during the day on Saturday south of Dayton to Columbus. Finally additional thunder chances will be possible over the region in advance of the frontal boundary Saturday night. Winds will pick up near the front and after the front moves through Saturday night into Sunday. Wind gusts around 30 to 40 mph at times will be possible. Temperatures will drop for the first part of the night Thursday night, but then will climb the second part of the night as warmer air works into the region. Temperatures will continue to climb into Friday with highs in the 50s and 60s. Similar temperatures will be present for Saturday before the cold front moves through Saturday night. With the passage of the cold front temperatures will only be in the middle 40s to middle 50s on Sunday. Similar high temperatures will then remain through the remainder of the long term. && .AVIATION /16Z WEDNESDAY THROUGH SUNDAY/... Winds have shifted to the northwest with the passage of a line of showers. A cold front will follow early in the TAF period. Expect ceilings to fall to IFR behind the front. Showers will occur through the morning and then decrease in the afternoon. It appears that there will be little if any visibility restriction with this precipitation. Ceilings may lift to MVFR from KDAY to KCMH/KLCK after 21Z with IFR prevailing elsewhere. Winds will veer to north and then northeast after 00Z. Rain will spread across the area tonight. This will result in MVFR visibilities and where ceilings had earlier lifted will bring a return to IFR. OUTLOOK...MVFR/IFR ceilings and visibilities are likely to continue into Saturday night. MVFR ceilings may linger Sunday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && $$ SYNOPSIS...Haines NEAR TERM...Haines SHORT TERM... LONG TERM... AVIATION... is the U.S. government's official web portal to all federal, state and local government web resources and services.