Aikyam-Lab/Synoptic-Bench huggingface dataset:
139 AM EST Sat Dec 17 2016 Cold high pressure off the Mid-Atlantic coast will continue to ridge into the Carolinas and Georgia into this morning. A warm front will develop to our south and move northward through the during this afternoon.
Very late in the period, a cold front and rain/thunder showers will approach the region, but given it's slow movement -- have opted to leave out of the TAF for now.
1044 PM PST Fri Dec 16 2016 An arctic cold front will continue to through the region this evening.
359 AM EST Sat Dec 17 2016 Early this morning what is left of a sub-freezing lingering classical CAD wedge in our far NE CWA should continue to warm above the freezing mark near sunrise or shortly thereafter. Have therefore planned to allow current Special Weather Statement for isolated freezing rain or drizzle to expire. Nam 295 K theta sfc does indicate some increased upglide ramping up after 12z today so continued high chance pops to likely for light rain or showers mainly north of the Atlanta metro area today with mostly cloudy skies elsewhere given the low level moisture present but lacking forcing mechanism.
945 PM MST Fri Dec 16 2016 Somewhat cooler and continued unsettled weather is forecast tonight and early Saturday for south central Arizona.
915 PM PST Fri Dec 16 2016 Scattered light showers will continue overnight before ending early Saturday morning as the strong trough that brought soaking rains west of the mountains moves east.
A cool airmass has settled over the area with highs today several degrees cooler than yesterday.
Temperatures have climbed to near to above freezing in southeast Missouri and much of west Kentucky, and into the upper 20s across the rest of the PAH forecast area. A better surge of moisture is expected across the area Saturday ahead of our approaching cold front. ECMWF and NAM show the cold front bisecting the PAH forecast area from southwest to northeast by 18z, with the GFS just a few hours slower. The quick drop in temperatures will result in quite a mixture of precipitation for the overnight hours Saturday, with rain to freezing rain and sleet to snow. Though freezing and frozen precipitation could cause some road impacts, also of concern will be liquid already on the ground from earlier rain freezing with the rapid temperature drop.
239 AM MST Sat Dec 17 2016 Upper trough is now crossing the north central CONUS into the Great Basin with the main axis across the CWA. Strong upper ridging has set up across the Pac NW. Arctic high pressure now sits across the northern plains with the center over eastern MT into northeast WY.
Currently mostly cloudy skies across the area with warm December temperatures generally in the lower to middle 70s. Finally the much advertised cold front is currently moving into southern Oklahoma and the Texas panhandle. The strong cold front will being to move into the northwest portions of the forecast area just prior to midnight.
359 AM CST Sat Dec 17 2016 The highlights in the short term will be dangerous wind chills spreading across the region by this morning.
This prefrontal trough will continue to move eastward as the front makes its way across the state. Some isolated snow showers will be possible closer to the frontal passage, however the most of the activity will likely remain near the higher terrain, with precipitation shadowed regions like the Little Colorado River Valley missing much of the precipitation. No significant precipitation is expected for most of this time, as an elongated trough remains over the area, but without producing significant upper level support. By midweek zonal flow and stable conditions will move back into the region as the elongated trough finally separates as a closed low off the coast of Baja California. A strong trough will pass over the Rockies around Friday and some model guidance has instability move far enough south to affect Northern Arizona, especially the GFS opperational solution.
The hemispheric view continues to show a wave number of 3 around the globe with two strong blocking highs over the Pacific Ocean and Western Europe. It is very cold across the CWA this morning with temperature below freezing just about everywhere but the immediate coast. The flow aloft has turned to northwest to north as a long wave ridge builds in from the southwest.
As this occurs, higher dewpoints will advect into the area introducing the potential for sea fog over the cooler Gulf waters.
336 AM CST Sat Dec 17 2016 Early-morning water vapor imagery revealed a positively tilted mid-level trough from the northern High Plains to lower Colorado Valley with a downstream, lower-amplitude perturbation rapidly moving away from the mid Missouri Valley.
Cold front continues to surge southeast and at 6z was located near the upper TX coast through central LA and northeast MS.
High pressure will be East of the region Today, producing a warm Southerly flow and near record high temperatures.
1202 AM EST Sat Dec 17 2016 A wintry mix of precipitation is expected with weekend low pressure. Nevertheless, strong warm advection will initiate a rapid phase change to sleet and freezing rain as the night progresses. Light snow should develop later this evening with a change over to freezing rain from south to north overnight. Temperatures will rise overnight, and will quickly rise above freezing by daybreak south, and by mid to late morning north. Have continued to hold onto freezing rain for a time after air temperatures go above freezing with cold ground to be overcome.
An area of high pressure is moving off the New England coast with the ridge axis stretching across Central Florida. The C-MAN stations are a different story, east of the upper Keys we are finding the highest winds around 20 knots, with 15 knots and gusty at Long Key, while Sand Key, Smith Shoal, and Pulaski Shoal showing decreasing winds over the past few hours at 15 knots or less.
1114 PM CST Fri Dec 16 2016 Strong cold front is scheduled to arrive earlier than expected at CDS and PVW (about 5 AM and 9 AM, respectively), but should still clear LBB around 2 PM or so. /issued 919 PM CST Fri Dec 16 2016/ Updated winds and temps through Saturday to account for the recent acceleration of the cold front through the northeast TX Panhandle. This is about six faster than earlier forecasts indicated, but on par with trends from the high resolution model camp. The narrow overlap between ascent with the progressive upper trough and low level saturation do not look impressive for anything more than our forecast of very light wintry accumulations in our northern zones, so no changes are warranted there.
1159 PM CST Fri Dec 16 2016 Based on reports around the area there has been freezing drizzle for the area south of Interstate 80 this afternoon. The freezing drizzle has been slowly pushing to the north this afternoon. Expect the freezing drizzle to continue to spread to the north during the evening. The area where the greatest accumulation of freezing drizzle will be in the east where it will last the longest. A cold front will move through the area during the evening and turn winds to the north and start to increase. As the colder air moves into the area the freezing drizzle will give way to snow. The freezing drizzle will continue to move to the north this evening and will gradually end from southwest to northeast during the evening hours.
Gusty southwest to west winds will develop by late morning, with an arctic cold front spreading south across the terminals during the late afternoon and early evening hours. An arctic cold front will arrive at KABI and KSJT towards the end of the forecast period, with strong north winds following the front. The main stories on Saturday will be a strong Arctic cold front that will approach the forecast area and unseasonably warm temperatures ahead of the front. The aforementioned cold front will move into the northern Big Country by early to mid afternoon, then approach the northern Concho Valley by 6 PM. As the cold front approaches during the afternoon, temperatures will quickly fall 20 to 30 degrees behind the front and north winds will increase to 15 to 25 mph, with higher gusts.
1126 AM EDT Sun Apr 2 2017 Building high pressure should result in dry weather today. A series of crossing low pressure areas will keep periodic rain chances in the forecast for the upcoming work week. Showers are expected to increase from W-E later Monday and Monday night as the trough approaches, with increasing moisture, ascent, and low level jet support.
936 AM EDT Sun Apr 2 2017 Temperatures are quickly warming this morning after a cooler start. Temperatures will rise only into the low 80s along the coast due to the east coast sea breeze moving inland, but rise near 90 to the lower 90s inland. A warm front will lift northward along the Gulf coast this afternoon, increasing low level moisture into the far southern portion of the region. Cirrus clouds will increase from the Gulf today ahead of an upper trough.
857 AM EDT Sun Apr 2 2017 High pressure will continue to slowly build over the region today.
621 AM CDT Sun Apr 2 2017 H5 analysis from earlier this evening is highlighted by a closed low over western New Mexico and eastern Arizona with a trough extending south into northern Mexico. East of the low, a low amplitude ridge extended from southern Alabama into Iowa. West of the trough, low amplitude ridging extended from central California into southern Idaho. Readings as of 3 AM CDT were generally in the lower 40s with the exception of Ogallala and Imperial which were in the upper 30s. That being said, limited highs to the lower 60s today.
At 6 am CDT a cold front extended across northwest North Dakota. This morning a trough of low pressure and an associated cold front extended from eastern Saskatchewan southwest through central Montana. A warm front extended from Saskatchewan through northeast North Dakota. Abundant high clouds will initially spread across the state but as the cold front enters the west will see clearing behind it northwest. Highs should warm into the lower to middle 60s across the south central where frontal mixing ahead of the cold front should somewhat overcome the clouds. Somewhat cooler air will move into the northwest but the afternoon early April sun will help soften the cooling. Highs there will be at least into the low to mid 50s. Clearing skies tonight are expected in the wake of the cold front with overnight lows in the 30s.
652 AM CDT Sun Apr 2 2017 Cold front has entered into western ND and will sweep across the area this afternoon and overnight. Upper air pattern will become more amplified by the end of the period with ridge building in the west. Water vapor loop indicated an upper level low over eastern SASK with a jet on the south side. Upper low was moving to the east. Another upper level trough moving into the Pacific Northwest and will move across SD/NE on Mon. Another upper level trough over southwest Canada will move into the Northern Plains Tue night and bring a threat for rain/light snow Tue and Tue night.
841 AM PDT Sun Apr 2 2017 A weak low pressure trough will swing southeast across the Great Basin on Monday, ramping up onshore flow and the marine layer across southern California. Westerly winds will become gusty over the mountains and deserts, and it will be cooler.
1101 AM EDT Sun Apr 2 2017 Building high pressure should result in dry weather today. A series of crossing low pressure areas will keep periodic rain chances in the forecast for the upcoming work week. Showers are expected to increase from W-E later Monday and Monday night as the trough approaches, with increasing moisture, ascent, and low level jet support.
730 AM EDT Sun Apr 2 2017 Low pressure over the western Atlantic this morning continues to pull away while high pressure builds east from the Ohio Valley.
A few showers will linger today as a weak upper level trough crosses the area.
Weak high pressure northeast of Florida will produce east to southeast winds 10 knots or less through the day. A cold front approaches the area on Monday and will produce an increase in winds on Monday as the pressure gradient tightens.
1126 AM EDT Sun Apr 2 2017 Low pressure over the western Atlantic this morning continues to pull away while high pressure builds east from the Ohio Valley.
Conditions reflect that of summer, with temperatures already in the lower 80s and dewpoints in the mid to upper 70s. The Pulley Ridge buoy reports 2 foot seas.
627 AM CDT Sun Apr 2 2017 Early-morning water vapor imagery depicts an elongated mid-level trough stretching from western Nebraska to northwest Mexico with multiple circulations embedded within this broader-scale feature. Moisture flux and isentropic upglide within the warm-conveyor airstream associated with the upper trough have fostered a discontinuous band of convection extending from the southern Plains into mid MO Valley as of 08z.
/Issued 418 AM CDT Sun Apr 2 2017/ As the main positive tilted upper level trough develops across the Rockies extending equatorward into northern Mexico, this will continue to the be main focus of the weather pattern over the near term forecast period.
Cold front has entered into western ND and will sweep across the area this afternoon and overnight. Upper air pattern will become more amplified by the end of the period with ridge building in the west. Water vapor loop indicated an upper level low over eastern SASK with a jet on the south side. Upper low was moving to the east. Another upper level trough moving into the Pacific Northwest and will move across SD/NE on Mon. Another upper level trough over southwest Canada will move into the Northern Plains Tue night and bring a threat for rain/light snow Tue and Tue night.
/issued 400 AM EDT Sun Apr 2 2017/ TODAY through MONDAY: Prevailing flow will be southeasterly today as high pressure center slides off the Carolina coast.
A cold front will cross northern Utah today then stall across southern Utah tonight. High pressure will return to the region for midweek. A low amplitude upper trof is moving into the nrn Rockies this morning with the associated cold front beginning to cross n UT. Ridge conditions are then expected to dominate the CWA late Tue thru Thu. Southeast winds are expected to shift to the northwest between 17Z and 19Z with the passage of a cold front.
Early-morning water vapor imagery depicts an elongated mid-level trough stretching from western Nebraska to northwest Mexico with multiple circulations embedded within this broader-scale feature. Moisture flux and isentropic upglide within the warm-conveyor airstream associated with the upper trough have fostered a discontinuous band of convection extending from the southern Plains into mid MO Valley as of 08z.
Rather favorable shear and helicity showing up in the latest NAM run as a warm frontal boundary moving northward across the area through the day. Chattanooga Airport, TN 80 60 71 58 / 0 10 90 70 Knoxville McGhee Tyson Airport, TN 78 56 72 58 / 0 10 80 80 Oak Ridge, TN 77 55 71 57 / 0 10 80 70 Tri Cities Airport, TN 74 50 70 55 / 0 10 60 80.
842 AM EDT Sun Apr 2 2017 Building high pressure should result in dry weather today. A series of crossing low pressure areas will keep periodic rain chances in the forecast for the upcoming work week. Stratus has eroded across most of the area under building high pressure, though some patchy fog has formed as radiational cooling resulted in nearly saturated air at the surface. Showers are expected to increase from W-E later Monday and Monday night as the trough approaches, with increasing moisture, ascent, and low level jet support.
719 AM EDT Sun Apr 2 2017 High pressure will build over the region today.
The first is already ongoing with scattered showers and thunderstorms developing near a northward advancing warm front. The second round of activity will occur later this afternoon into the overnight hours as a low pressure area and an associated cold front move east out of Texas across the area. With front and upper trough moving east of the area Monday morning.
Still not looking for much accumulation, the lower snow levels may allow a half inch of slush.
1139 AM CDT Sun Apr 2 2017 Showers and some storms are expected to continue to develop and move across portions of the fa the rest of today and tonight as the upper low continues to move across the Southern Plains.
The dryline/cold front will move across the KMFE area around noon, with dry northwest winds in its wake. About this time, the H5 trough rotates through the region, with the RR quadrant of the midlevel jet moving across Deep South Texas. HRRR/RAP indicating CAPE values in the lower valley in excess of 3500 for this small window, so any thunderstorms that finally develop would get strong quickly. The H5 trough sweeps offshore by 6z, forcing the dryline/front back offshore and restabilizing the entire area. The remainder of the period after midnight tonight into tomorrow will be very stable with high pressure sfc and aloft.
1019 AM EDT Sun Apr 2 2017 High pressure will continue to slowly build over the region today.
854 AM EDT Sun Apr 2 2017 High pressure will bring milder conditions today.
High pressure building toward the mid- Atlantic coast will shift offshore later tonight. However sufficient daytime heating will exist for temperatures to rise into the low to mid 80s along the coast and upper 80s to around 90 degrees inland. High pressure near the mid-Atlantic coast will increase E/SE winds over the waters up to 10-15 knots today, and up to 15-20 knots offshore late tonight. Still, the lowest RH values will be between 35 and 40 percent over the north interior (Orlando north/west).
1212 PM EDT Sun Apr 2 2017 Low pressure over the western Atlantic this morning continues to pull away while high pressure builds east from the Ohio Valley.
The cold front and showers near the ID/NV border will move to the southeast and exit the area by noon. A drier northwest flow aloft will provide the region with breezy northwest winds and cooler temperatures today. A Flood Warning remains in effect for the Boise River near Glenwood Bridge and the Snake River near Weiser. A cold frontal passage early this morning brought light rain showers to the area. This will keep temperatures a little cooler today around normal for this time of year. Northwesterly flow remains in place as the upper level trough moves across western Montana on Monday. The trough will bring a chance of snow showers to the higher terrain of Baker County through the West Central mountains.
A system of low pressure will then approach the area on Monday bringing a chance of showers and thunderstorms with it.
746 PM EDT MON AUG 8 2016 High pressure will bring clear weather to the area tonight with temperatures falling into the 50s.
845 PM EDT MON AUG 8 2016 Scattered thunderstorms moved through portions of the lower and upper Florida Keys, most with low rainfall totals but a couple with frequent lightning. The weak extension of high pressure in the western Atlantic and lower pressure over the southeast United States will cause a resumption in the lower tropospheric southeast flow overnight, and current lower 80s temperatures will likely rise into the mid 80s unless cooled by a passing shower or thunderstorms. Once this evening's scattered showers and isolated thunderstorms decrease temporarily, the high pressure ridge over south Florida will help resume a southeast flow near 10 knots over the adjacent Gulf, Bay and Hawk Channel waters, and 10 to 15 knots for a short while after midnight.
/issued 326 PM CDT MON AUG 8 2016/ Water vapor imagery shows a weakening mid/upper level ridge over Texas, with an upper level trough and deeper tropical moisture from the Gulf South into the northeast Gulf of Mexico. Upper level ridging to the west is still expected to weaken as the week goes on. Meanwhile, the subtropical ridge east of Florida, will strengthen and build to the west. This will push the remnant upper level trough and deeper tropical moisture over the Gulf South to the west and around the Lower Mississippi Valley area by mid to late week.
848 PM PDT MON AUG 8 2016 A deepening trough of low pressure will bring night through morning low clouds and fog west of the mountains, along with below normal temperatures for many places through midweek. A warming trend and shrinking marine layer is then expected for the end of the week into the weekend as high pressure builds aloft.
Temperatures ranged from the low to mid 60s along the North Shore of Lake Superior to the lower 80s in spots away from the lake. The best chance will be during the afternoon, during peak daytime heating and in the vicinity of the front/trough. A cold front will move into or stall across the southern forecast area Tuesday evening or overnight as high pressure moves into northern Minnesota. The models continue to indicate an upper level ridge will build into the Northland during the middle of the week, brining a surge of warm and more humid air into the region.
An upper level low just east of the Cascades this evening will move slowly southeast tonight and Tuesday for cool weather and a few showers.
Temperatures will be a little warmer in response to increased sunshine. Cooler temperatures will reflect the increased clouds/chance of precipitation. A low pressure trough that has been relatively stationary along the west coast will begin to shift east and de-amplify Wed night and Thu. The trough will shift into the high plains on Fri as high pressure develops off and along the west coast. KASE and KTEX have the highest probability of being briefly impacted by storms with MVFR cigs/vsby.
Kept the low thunder chances across the far southern FA for now. A low pressure system over northeastern WY will eject out of the Rockies and into western SD Tuesday night while the ridge axis extending south from a Canadian surface moves to east of the region. Focus then turns to the warm front lifting out of SD.
Expect min temperatures primarily in the low/mid 70s, but a few locations will likely dip into the upper 60s by sunrise. Temperatures will be a degree or so warmer tomorrow, with heat indices near 100 degrees.
Despite the presence of an upper level ridge across the region, high resolution models are indicating isolated to scattered showers and thunderstorms this afternoon and evening, especially across the Big Country. Another hot day is in store for Tuesday as an upper level ridge continues to dominate our weather.
500mb height falls up to 60m were analyzed from the High Plains west across the northern Rockies. a weak warm front/wind shift was noted near the KS-NE border, though the strongest 850mb southerly winds were noted in western SD to central ND, closer to the 850mb low in SK.
Dewpoints were on the increase on southerly winds within the backside of the high pressure region. Pwats increase to just over an inch over central wisconsin Otherwise a weakening cold front will slide over the northern plains on Tuesday. At the onset of this week, short waves ejecting from the main trough over the western states will gradually erode the upper ridge over the western Great Lakes. Progs continue to indicate a weak cold front stalling over northern Wisconsin Tuesday night.
950 PM EDT MON AUG 8 2016 High pressure will cross the area tonight into Tuesday, then move east Tuesday night.
1052 PM EDT MON AUG 8 2016 An area of low pressure over southern AL drift westward over the next few days allowing Bermuda high pressure to ridge into the southeastern states. Circulation around a broad area of low pressure over southern AL will continue a moist southeast flow from the Atlantic into the area overnight. Several models indicate weak short wave energy circulating around an upper low off the southeast coast crossing the Lowcountry into the eastern Midlands around sunrise. The high low-level moisture and nocturnal cooling should help support stratus development late tonight. Upper level trough over the northern Gulf of Mexico east across Florida will slowly retrograde during the period.
Active weather expected for Tuesday as an upper trough over the Pacific NW starts to eject to the NE through portions of Idaho and W Montana. For Tuesday, lee side troughing at the surface develops and begins ramp up SE surface winds over the eastern plains.