Forecast Discussions mentioning any of "HRRR" "RAP" "RUC13" "RUC" "RR" received at GSD on 04/02/17


Area Forecast Discussion
National Weather Service Albany NY
1051 PM EDT Sat Apr 1 2017 .SYNOPSIS... High pressure will control our weather Sunday and Monday. Another storm system could bring locally heavy rain Monday night and Tuesday. && .NEAR TERM /THROUGH SUNDAY/... As of 1045 pm, amplifying shortwave trough was evident on water vapor imagery digging into northeast PA. Lift ahead of this feature as well as some degree of increased midlevel moisture had allowed for a few showers to develop across the Mohawk Valley and Helderbergs, but these have diminished. Clearing noted on IR imagery in the wake of this wave should spread into the ALY CWA after 06Z, leading to some decrease in cloud cover. Previous discussion...As of 330 pm EDT...A coastal low /996 hPa/ on the latest RAP situated south/southeast of Martha`s Vineyard and Nantucket this afternoon will continue to slowly move eastward out to sea. In the mid and upper level cyclonic flow, a weak disturbance will move across the region tonight. The mid and upper level disturbance will focus some sct snow showers mainly north and west of the Capital District. Some light rain showers are possible early this evening before the column cools. The favored areas for light snow accums of a coating to less than a half an inch will be along the upslope/west facing slopes of the western Adirondack and southern Greens. Plenty of low- level moisture will remain in place for cloudy/mostly cloudy conditions early on based on the NAM/GFS moisture profiles and BUFKIT soundings. Some and clearing begins to occur between 06Z- 10Z. Lows temps will generally be inn the upper 20s to lower 30s across the region with a few mid 20s over the mountains. Tomorrow...Increasing sunshine during the late morning and into the afternoon with high pressure building in from the OH Valley and the Great Lakes Region. Partly to mostly sunny conditions should prevail during the afternoon due to the strong subsidence with the anticyclone. Any residual west/northwest upslope snow showers should decrease quickly in the late morning along the western Adirondacks. The mid and upper level trough axis moves downstream during the afternoon with heights beginning to rise late in the day over upstate NY. H850 temps will be in the -3C to -7C range based on the latest NAM/GFS with decent mixing to H900-850, as temps will be slightly below normal for early April with highs in the upper 30s to lower 40s over the mountains with mid 40s to around 50F readings in most of the valley areas, except the mid-Hudson Valley and portions of southern Litchfield County where some lower to mid 50s are possible. Northwest winds will prevail at 10 to 15 mph with some gusts in the 20-205 mph range. && .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY NIGHT/... High pressure controls the weather Sunday night and Monday with the high pressure building offshore during the day on Monday. Warm advection increases through the day Monday and high clouds could spread through our region during the afternoon ahead of the next system. Lows Sunday night are expected to be in the mid 20s to lower 30s with highs on Monday in the upper 40s to mid 50s. Rain spreads across the region Monday night as the next system approaches our region but some mixed precipitation is possible in parts of the southern Adirondacks and southern Green Mountains. Lows are expected to be in the mid 30s to lower 40s. On Tuesday we are expecting rain which could be locally heavy with highs in the upper 30s to mid 50s as a system approaches from the Ohio Valley. Tuesday night conditions will gradually improve from west to east as the storm system moves off the eastern seaboard and deepens rapidly near the Gulf of Maine. Lows Tuesday night are expected to be in the upper 20s to around 40. && .LONG TERM /WEDNESDAY THROUGH SATURDAY/... Medium-range deterministic models and GEFS members are in generally good agreement in the pattern for the middle to the end of next week. Brief upper ridging and surface high pressure will build in Wednesday behind the departing low, leading to a tranquil and seasonably mild day. Quiet weather will be short-lived as a deep upper trough crosses the central CONUS and cuts off over the Upper Midwest Thursday, with the upper low moving into the northeastern US on Friday. This system appears to have a good moisture feed associated with it, transported northward by a +2 to +3 SD 850 mb v- wind component per the GEFS. In all likelihood, this will lead to a period of steady and perhaps heavy rainfall Thursday and Thursday night. With temperatures and dewpoints primarily remaining above freezing, the combination of rainfall and snowmelt as well as preexisting wet conditions leads to flooding concerns. Model consensus supports the main moisture feed shifting east on Friday as the upper low moves overhead, leading to a decrease in the coverage of rainfall Friday into Saturday, but still likely showers around. Will have to monitor the progression of the cutoff low in future model runs, as they tend to slow down with time. Any slower solution could lead to a more prolonged moisture feed and would exacerbate the heavy rain potential. && .AVIATION /03Z SUNDAY THROUGH THURSDAY/... An influx of drier air as a coastal low pressure system pulls away has resulted in cloud bases rising to VFR this evening. This TAF package has continued VFR conditions throughout the night, although weak cold air advection could lead to periodic lowering back to MVFR as well. A few rain and snow showers are possible ahead of an upper level disturbance mainly before 06Z at KALB and 08Z at KPSF, but unlikely to result in meaningful vsby restrictions. Expect a clearing trend after 06Z in the wake of this upper level disturbance. Less cloud cover will be around on Sunday as high pressure makes inroads into the region. SCT-BKN cumulus in the morning will trend to FEW-SCT in the afternoon, with VFR conditions continuing. Winds tonight will mainly be from the northwest at 5-10 kt. West-northwest winds will increase a bit Sunday afternoon with gusts to around 20 kt possible. Outlook... Sunday Night: No Operational Impact. NO SIG WX. Monday: No Operational Impact. NO SIG WX. Monday Night: Moderate Operational Impact. Likely RA. Tuesday: High Operational Impact. Definite RA. Tuesday Night: Moderate Operational Impact. Chance of SHRA...RA. Wednesday: No Operational Impact. NO SIG WX. Wednesday Night: No Operational Impact. NO SIG WX. Thursday: Moderate Operational Impact. Chance of RA. && .FIRE WEATHER... A good portion of eastern New York and western New England continues to have snow on the ground and even areas that don`t have ground that is wet. High pressure will control our weather Sunday and Monday. Another storm system could bring locally heavy rain Monday night and Tuesday. && .HYDROLOGY... A series of storm systems will impact the Albany Hydrologic Service Area during the next week. The next event will be Monday night and Tuesday with mainly rain but some mixed precipitation is possible in higher elevations Monday night and early Tuesday morning. There could be locally heavy rain Tuesday along with snow melt. The longer range Multi-Model Ensemble River Forecast System has some points reaching minor flood stage next week Tuesday into Wednesday as the result of snow melt and additional precipitation. There is increasing confidence of another strong storm system that will affect the eastern U.S. the end of next week with the potential for more locally heavy rain and snow melt. Depending on how the snow from the blizzard last month melts and where the heaviest rain falls, the potential for widespread flooding needs to be watched closely. For details on specific area rivers and lakes, including observed and forecast river stages and lake elevations, please visit the Advanced Hydrologic Prediction Service /AHPS/ graphs on our website. && .ALY WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. MA...None. VT...None. && $$ SYNOPSIS...11/Wasula NEAR TERM...Thompson/Wasula SHORT TERM...11/NAS LONG TERM...Thompson AVIATION...Thompson FIRE WEATHER...11/NAS HYDROLOGY...11/NAS
Area Forecast Discussion
National Weather Service Cleveland OH
947 PM EDT Sat Apr 1 2017 .SYNOPSIS... High pressure will build across the region tonight. The high will drift east on Sunday and set the stage for low pressure to move toward the area from the Missouri on Monday. The low will move through northwest Ohio Monday night and reach the Central Great Lakes by Tuesday morning. && .NEAR TERM /THROUGH SUNDAY/... Minor adjustments to cloud cover with this update. Low level clouds have been quick to clear across the eastern part of the area, with some lingering clouds from along/west of Youngstown to Erie. Some mid/high clouds streaming into northwest Ohio from the west may impact the area through the night. Primary change in forecast wording is to partly cloudy conditions for the western half of the area to account for these clouds. Otherwise no changes made. Original discussion... Clearing slowly making its way into the area from the northwest. Timing has worked out well from the HRRR and will continue to follow a combination of current movement trends and the HRRR through the evening. This would take the clearing line to near a MFD-MNN 23-24Z. Hesitate to plot the line further east because I think the clouds will get hung up where the elevation rises from the lake east of CLE to ERI for a few hours this evening before eventually clearing. But, by 04z much of the area should be clear except for a possible lingering cig in nwrn PA. Lows should drop to the low to mid 30s. && .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY NIGHT/... Sunday high pressure should be over the area in the morning and then shift east of the area during the day. This should allow high clouds to increase from the west during the afternoon. Expect the morning and possibly early afternoon to be fairly sunny east half with clouds becoming more opaque after mid afternoon. The west half of the area should have a sunny/partly sunny start with increasing clouds from mid/late morning on. Monday morning low pressure will be in southern Missouri with deep moisture ahead of the low out of the GLFMX into the lower Ohio Valley. This moisture will spread into the area from the west during the morning. Will bring chance pops into the west during the morning Monday increasing to categorical in the afternoon. Central counties will have chance pops by about noon also rising to categorical. The eastern third will have likely pops for the afternoon. Monday night the low will pass across northwest Ohio and reach the southern Lake Huron/central Lake Erie region by Tuesday morning depending on model. Will continue with categorical pops for showers and a chance of thunderstorms as deep moisture and capes 500-800J/kg overspread the area ahead of the low. Also after midnight a cold front will swing in from the west. Tuesday rain will end from the west as the low pulls east across New England. Temps mid 50s to lower 60s although northwest flow tuesday should keep a lid on highs central and northeast within several miles of the lake. && .LONG TERM /WEDNESDAY THROUGH SATURDAY/... Similar pattern continues into the long term to end the week. Wednesday will be our dry day with high pressure across the eastern Great Lakes and have removed precip from the daytime. Ensembles and deterministic runs similar in taking a closed low across the Ohio Valley slowly between Thursday and Friday and slower is usually the way to go with these closed lows. Periodic showers can be expected. Temperatures will be seasonable, but there is still varying model opinions on how warm it will be especially ahead of the low. Kept close to what we had now as showers/cloud cover may limit it. Warm MEX numbers are on the warm side of possibilities. As the low departs highs will be back into the 40s for Friday/Saturday. Kept some of the rain/snow mention for Friday night/early Saturday, but this could still be a stretch and it is near the end of the forecast. && .AVIATION /00Z Sunday THROUGH Thursday/... High pressure crossing the area late tonight and Sunday will provide dry conditions. The MVFR stratocu over the se part of the area will continue to slowly recede se and dissipate. There is some concern that the light winds with the high tonight will allow some fog to form over the inland area late in the night. Models indicate sct to bkn cirrus moving in from the west so will only allow for MVFR level fog to develop. Cirrus will continue to increase Sunday along with some mid level clouds for mid to late afternoon. OUTLOOK...Non-VFR likely Monday afternoon into Tuesday and again Thursday. && .MARINE... Light winds expected through Sunday with high pressure across the region. Afternoon lake breeze/onshore flow possible Sunday. For Sunday night/Monday winds will begin to respond to low pressure developing across the mid-Mississippi Valley with an east-southeast direction. This low is expected to track across far northern OH or across the lake late Monday night. A wind shift to the northwest can be expected on the backside of this low. A small craft advisory is possible during this time frame, but right now it looks marginal. The easterly flow ahead of the low may be enough across the western half of lake or we may reach 4 footers in the northwest flow Tuesday. Everything calms down for Tuesday night/Wednesday with another brief high pressure residence. The next low will track across the southern lakes Thursday. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && $$ SYNOPSIS...TK NEAR TERM...Greenawalt/TK SHORT TERM...TK LONG TERM...Oudeman AVIATION...Adams MARINE...Oudeman
Area Forecast Discussion
National Weather Service Wichita KS
622 PM CDT Sat Apr 1 2017 .SHORT TERM...(This evening through Tuesday night) Issued at 239 PM CDT Sat Apr 1 2017 Numerous showers with a few embedded storms will gradually shift eastward and northeastward across the area tonight with the highest probabilities arriving across mainly Southeast KS toward morning. We may see a brief lull through the day on Sunday before another round or two of precipitation arrives as the mid/upper trough lifts out across the Southern Plains and into the Lower Mississippi Valley area late Sunday into early Monday. This will lead to another seasonably cool day on Sunday with most locations seeing highs in the low 60s. Mon-Tue...With clearing conditions on Monday, afternoon temperatures should return to the upper 60s/around 70 for most areas with light northerly winds. The break will be short-lived as another storm system begins to impact the Central Rockies late in the period on Sunday. Maintained low pops late Mon night although higher probabilities will arrive on Tue and Tue night. A period of strong or severe storms may be possible, but a subtle shift south in the storm track may preclude more widespread activity. Models continue to show a favorable precipitation signal across the region Tue-Wed. .LONG TERM...(Wednesday through Saturday) Issued at 239 PM CDT Sat Apr 1 2017 Precipitation will linger into Wednesday as the storm system gradually exits moving over the Middle Mississippi Valley area late in the day. Temperatures will struggle to climb out of the 50s on Wed with limited insolation & areas of precipitation. Moderating temperatures and dry weather conditions are anticipated as we move through the remainder of the week and into the weekend. Highs toward the end of the period may rise into the low 70s. && .AVIATION...(For the 00Z TAFS through 00Z Sunday evening) Issued at 620 PM CDT Sat Apr 1 2017 Low confidence aviation forecast on critical details. Overall... anticipate vicinity-scattered rain showers with isolated thunderstorms this evening. Finer details mainly based on RAP which suggests bulk of precipitation should wane later this evening. Boundary layer saturates with moist upslope flow leading to widespread IFR/LIFR conditions at all site except KCNU. Conditions will be slow to improve on Sunday with low VFR deck atop IFR deck. Some improvement should develop by midday, but for KSLN/KICT, loss of IFR is not expect until afternoon. -Howerton && .FIRE WEATHER... Issued at 239 PM CDT Sat Apr 1 2017 Grassland fire danger concerns will remain low with additional rounds of rain expected for tonight and again through the middle of the week. && .PRELIMINARY POINT TEMPS/POPS... Wichita-KICT 49 63 49 70 / 70 20 30 10 Hutchinson 46 60 46 69 / 70 20 20 10 Newton 48 61 48 68 / 70 20 30 10 ElDorado 51 63 51 69 / 80 30 30 30 Winfield-KWLD 52 64 51 70 / 80 30 40 20 Russell 41 60 41 68 / 80 10 0 0 Great Bend 42 60 41 68 / 80 10 10 0 Salina 45 61 45 69 / 70 20 10 10 McPherson 45 60 45 68 / 60 20 20 10 Coffeyville 54 69 54 69 / 90 70 60 60 Chanute 53 68 53 68 / 90 70 60 60 Iola 52 68 52 67 / 90 70 60 60 Parsons-KPPF 54 69 54 69 / 90 70 60 60 && .ICT WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...MWM LONG TERM...MWM AVIATION...PJH FIRE WEATHER...MWM
Area Forecast Discussion
National Weather Service Jacksonville FL
918 PM EDT Sat Apr 1 2017 .UPDATE... A mid to upper level ridge will build in over the region tonight and skies will continue to be mostly clear. A bit drier overall than yesterday with mean layer RH about 25%. Weak pressure gradient resulted in both east and west coast sea breezes to push inland this afternoon with dewpoints dramatically rising 5-10 deg after boundary passage. Winds will go light to calm overnight with a gradual increase in upper level moisture from the southwest and west per latest water vapor imagery. For the update...minor tweaks to lower temps a bit over nrn zones and add some patchy fog over parts of NE FL where HRRR and SREF show some potential after about 08z tonight due to the influx of the moisture from sea breezes. && .AVIATION...Prevailing VFR. Light to calm winds tonight become east to southeast around 10 kt Sunday. && .MARINE...High pressure will build to the coast of North Carolina on Sunday and then shift east into the western Atlantic on Monday ahead of an area of low pressure. Winds tonight southeast to south around 5-10 kt with seas of 1-3 ft mainly due to easterly swell about 8-11 seconds. && .PRELIMINARY POINT TEMPS/POPS... AMG 56 88 62 85 / 0 0 10 60 SSI 62 78 66 74 / 0 0 0 10 JAX 56 85 63 84 / 0 0 0 40 SGJ 63 82 67 81 / 0 0 0 30 GNV 54 89 64 86 / 0 0 10 50 OCF 55 90 64 88 / 0 10 10 50 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. && $$ Shashy/Peterson/McGinnis
Area Forecast Discussion
National Weather Service North Platte NE
615 PM CDT Sat Apr 1 2017 .SHORT TERM...(This evening through Sunday) Issued at 342 PM CDT Sat Apr 1 2017 The forecast concerns in the short term period revolve around precipitation chances and some fog potential late tonight/early tomorrow morning. Latest visible/IR satellite imagery shows scattered/broken clouds over much of the Sandhills presently. Latest water vapor imagery shows a broad mid-level closed low just south of the Four Corners with enhanced southerly mid-level flow evident east of the low from TX into KS and a low amplitude ridge stretching from the central Gulf Coast into the eastern Central Plains. Latest radar mosaic shows convection ongoing across western KS and portions OK with showers beginning to make its way into south central NE. The progress of showers in western KS, south of western and north central NEB, is being limited by dry air in the lower troposphere as it moves northward with BUFKIT profiles showing dry air in areas between 925-700 hPa. Further, surface dew point depressions as high as 15-25 degrees across portions of southwest NEB. As warmer air gets drawn forward late today, an area of mid-level frontogenesis and zone of enhanced deformation is expected to move northward into the southeast half of the local forecast area late this afternoon-evening. Latest deterministic guidance shows variability with their general precipitation areal coverage and QPF as the lower tropospheric forcing moves northward. The HRRR and ESRL HRRR largely limit the coverage of precipitation in the local forecast area and shunts it more so to central NEB. Meanwhile, GFS, NAM12 and flavors of WRF bring it largely across the southeast half of the local forecast area with a swath of precipitation diminishing tonight. Leaned more towards the HRRR/ESRL HRRR solutions than others given the latest radar trends and expected impediment of dry air. Will need to monitor and see the 00Z sounding for possible refinement of the forecast. Tomorrow, conditions should be conducive for highs reaching into the lower/mid 60s as warmer air moves in aloft at lower-levels and given the combination of decent mixing and insolation. Highs expected to be about 5 to 10 degrees above seasonal normal values. .LONG TERM...(Sunday night through Saturday) Issued at 342 PM CDT Sat Apr 1 2017 For Sunday night and Monday, most of central Nebraska remains dry as high pressure continues to be situated over the region. Portions of northern Nebraska still have a slight chance of seeing some light rain on Monday as a weak shortwave moves across South Dakota. High temperatures continue to be mild on Monday with highs ranging from the low 50s across the Pine Ridge region to the low 60s across south central Nebraska. This shortwave will be quickly followed by the next major system on Monday night. A developing low moving off the Rockies will move across northern Kansas and southern Nebraska over the next several days. Precipitation is expected to start off as rain on Monday night before changing over to a rain/snow mix and all snow across the Pine Ridge region. Accumulations will be light and impacts on travelers are expected to be minimal. As the warm front moves into Nebraska on Tuesday, rain will continue. With clouds and rain most of the day on Tuesday, temperatures will be cooler than the previous few days. Expect highs in the mid 40s to low 50s. The system will continue to develop and moves northeastward through Tuesday and Tuesday night. By Tuesday night, the precipitation shield will slowly move eastward, resulting in an end to precipitation across the eastern Panhandle. However, rain will continue across the rest of the forecast area through Wednesday, with a brief change over to a mix of rain and snow as cooler temperatures get pulled in behind the departing low. Precipitation finally comes to an end across the entire forecast area by Wednesday evening as high pressure builds into the region. This high will remain over the region through the end of the week keeping conditions dry. Temperatures will slowly rebound from the low 50s on Wednesday to the low to mid 60s by Friday. Temperatures even reach the upper 60s by next Saturday. && .AVIATION...(For the 00Z TAFS through 00Z Sunday evening) Issued at 615 PM CDT Sat Apr 1 2017 A shield of cloudiness will bring a period of MVFR ceilings and at least VCSH to KLBF from 02z-10z tonight. Skies will become VFR by 10z, with only a few high clouds forecat by Sunday afternoon. At KVTN, VFR conditions will persist the next 24 hrs. && .LBF WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...ET LONG TERM...Kulik AVIATION...Roberg
Area Forecast Discussion
National Weather Service Omaha/Valley NE
613 PM CDT Sat Apr 1 2017 .SHORT TERM...(Tonight through Tuesday) Issued at 245 PM CDT Sat Apr 1 2017 The main forecast issues are timing the best rain chances and rain amounts. Closed mid tropospheric low that we have been watching recently was along the AZ/NM border at 12Z with fairly weak (40 meter) 12 hour height falls on the south side of the system. 300 mb winds near that feature were as high as 80 knots. Stronger jetstream level winds of around 135 knots at 300 mb were punching into southern BC Canada. Latest models are in decent agreement that the center of the circulation will dive southeast tonight, then lift northeast into central TX by late Sunday. By late Monday afternoon it should be over southern IL. Tonight, gave a decent amount of weight to the early afternoon runs of the HRRR and RAP models. Expect pcpn to develop into the area from the southwest this evening as lift increases and another weak wave lifts across the region. Prior to midnight, the highest coverage of precipitation should be over the western parts of the forecast area. That will then progress eastward later tonight and into Sunday morning. Rainfall amounts could potentially reach over a quarter of an inch in parts of southeast Nebraska and southwest Iowa. There is some very weak elevated instability, mainly in southeast Nebraska. Not overly concerned with thunder potential, and the latest SPC outlook keeps general thunder through 12Z Sunday south of our area. Chance of thunder during the daylight hours of Sunday also looks fairly low, but rain chances will be high the first part of the day in our central and eastern zones.. Precipitation chances should decrease quite a bit by the afternoon as the wave moves off to the east. Trends from the 12Z GFS appear reasonable. The period from Sunday night through Monday evening looks mainly dry. Things start to change late Monday night and moreso into Tuesday. Rain/Rain Showers should spread northeast over the area behind a front that should extend from the Great Lakes region down into western Oklahoma. QPF amounts of over an inch seem likely (Tuesday through Wednesday), and amounts over two inches seem possible. Although the strongest forcing and thunderstorm potential should stay to our south, did include a mention of thunder from Tuesday afternoon into Tuesday evening over about the southeast half of the forecast area. .LONG TERM...(Tuesday night through Saturday) Issued at 245 PM CDT Sat Apr 1 2017 Kept the chance of precipitation high across southeast Nebraska and southwest Iowa Tuesday night and even into Wednesday, then started to taper rain chances down Wednesday night. This is all based on the current eastward progression of the shortwave trough and embedded closed low depicted fairly well by the GFS/EC/GEM. We will be on the cold northwest edge of the deformation zone, but for the most part the precipitation looks to be in liquid form for our area. A mid level ridge is expected to build eastward from the Rockies Thursday/Friday with dry weather. Potentially we could see rain chances increase again Friday night into Saturday, based on the 12Z ECMWF timing, but the GEM and GFS are dry. && .AVIATION...(For the 00Z TAFS through 00Z Sunday evening) Issued at 608 PM CDT Sat Apr 1 2017 Area of showers will continue to drift northeast toward eastern Nebraska TAF sites through Sunday morning. MVFR cigs near KLNK should persist, while cigs will gradually lower to MVFR at KOMA and KOFK after 06Z. Continued saturation of low levels due to rain will lower cigs to IFR most locations between 10Z and 18Z. Vsbys should average MVFR in rain, with a brief IFR vsby possible. As rain moves off to the east after 18Z, a slow improvement of cigs in to the MVFR category is expected. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None. && $$ SHORT TERM...Miller LONG TERM...Miller AVIATION...Dergan