Aikyam-Lab/Synoptic-Bench huggingface dataset:
Surface dew points at the top of the hour range from the lower 60s to around 70, highest towards south central NEB. A few thunderstorms will be possible Tuesday evening across Boyd, Holt, Garfield, and Wheeler Counties, some may be strong to severe as a negatively tilted trough swings through the region. The best moisture will be ahead of a cold front in eastern Nebraska by the time the storms fire so whether or not our eastern counties see any stronger activity will depend on the timing of this feature. Swift zonal flow takes over on Wednesday behind the exiting upper low.
350 AM CDT Tue Jun 13 2017 Today: The region remains under the influence of a weak mid level ridge extending from TX northeast across north MS and into TN. Tonight: Convection will wind down in the early evening as temperatures cool into the low to mid 70s.
Will call for the highest PoPs across the northeast and Plateau/Mountains for today.
243 AM EDT Tue Jun 13 2017 High pressure will remain over the area maintaining fair weather today with temperatures near normal. These clouds will help mitigate fog development despite light winds and sufficient low level moisture recovery with dewpoints in the lower 60s. Temperatures will be near or slightly above normal for mid-June, with highs in the low 90s and overnight lows in the upper 60s to low 70s.
But, dry and more seasonable temperatures return this weekend as high pressure builds over the region.
644 AM EDT Tue Jun 13 2017 A cold front will move south across the region reaching southern New Hampshire by late in the day.
Expect cooler temperatures for Tuesday and Wednesday, but it will remain dry.
After a chilly start this morning, expect warmer weather today with much less wind.
158 AM EDT Tue Jun 13 2017 An area of high pressure will remain centered along the east coast for the next few days, keeping a southerly flow across the region. Expect highs to be a few degrees cooler on Tuesday, in the upper 80s, as a little more cloud cover and pcpn coverage.
The eastern sections of the forecast area remained a bit drier as high pressure extended westward from the Carolinas. Weak upper troughing and a weak but persistent surface boundary across the forecast area will result in best coverage of diurnally oriented convection over the forecast area during the latter half of the work week and into the weekend. yet somewhat messy ridge pattern across the eastern 2/3rds of the country as a closed low emerges out of the northern Rockies into the Northern Plains and carries on a negative tilt. plentiful moisture will be place underneath a decaying mid level ridge. Although Bermuda sfc ridging will still be in place. a trough stemming from a cyclone across far eastern Canada will extend all the way down the Eastern Seaboard into Georgia. As the Canadian cyclone continue its eastward trek.
But unfortunately, without the cloud cover and sh/ts, the highs each day will be able to tack on a degree or two as well. This also looks to be fairly valid as well since the current synoptic weakness located from Virginia, where a trough is currently splitting the Bermuda ridge, southwestward to the Yucatan, where the weakness is expressed as an inverted trough, is expected to remain in tact and located along that axis through the remainder of the week. This westward heading is due to a deep upper trough digging in the eastern half of the CONUS esentially cutting its northward progression and turning it west.
1125 PM MDT Mon Jun 12 2017 Dry southwest flow aloft will remain over the area tonight, and will transition to westerly flow on Tue, as an upper level low moves from southwestern ID today, into central MT on Tue. High temps on Tue are expected to be a little cooler, and closer to average. RH values Tue afternoon will be below 15 percent at the lower elevations, and the with the winds being gusty in many areas, the weather conditions will reach critical levels in many locations.
Aloft, high pressure ridge will start to retreat southward today, and mid to upper level flow will remain southwesterly keeping abundant moisture around. Muggy overnight lows continue in the lower/middle 70s.
The atmosphere was moist in the low levels with moderate conditional instability and weak convective inhibition according to data from the Key West evening radiosonde balloon. Currently, air temperatures in most Keys island communities are in the lower 80s, and a few degrees cooler in locations visited by recent rains. A steady east breeze prevails, along the southern flank of an extensive subtropical high pressure cell.
354 AM CDT Tue Jun 13 2017 Latest surface analysis shows dryline has retreated west across the high Plains, with main synoptic boundary extending across NE/IA.
Meanwhile a low pressure system east of the region was pushing moisture back into portions of our eastern zones and the clouds along with some showers will linger overnight.
/issued 447 PM EDT Mon Jun 12 2017/ TONIGHT-WEDNESDAY: Weak high pressure off the Southeast Coast of the U.
305 AM CDT Tue Jun 13 2017 The upper level winds will increase over the panhandles today as a vigorous upper level trough moves out of the northern Rockies onto the northern high plains. The panhandles will be on the southern edge of this trough as it swings out onto the high plains.
Seasonable summer time conditions will again prevail across the region today as an upper level ridge axis transitions to the east. A weakening front will approach from the northwest as an upper level trough lifts northeast across the northern tier of the U.
About the only trick to the forecast is whether the low level moisture combined with weak upper level disturbances moving southwest around the periphery of ridge centered in northern Mexico just south of the Texas Big Bend will have enough to trigger notable, though isolated, showers. Other than the low potential for rain toward the coast, minor concerns in the morning are for a period of MVFR ceilings between sunrise and 10 AM, though the usual pesky development after 4 AM at McAllen in southeast flow is not out of the question.
1035 AM EDT Wed Aug 2 2017 The dry atmosphere of the past several days is coming to an end as a trough of low pressure is slowly moving northward in the northeast Gulf of Mexico. A warm frontal boundary will push northward into the area today, bringing a return of showers and thunderstorms to parts of the area this afternoon. The highest chances for storms will be in north FL and south-central GA.
650 AM CDT Wed Aug 2 2017 A weak trof of low pressure at the surface will drift across the area today and tonight. This trof combined with cyclonic synoptic flow aloft associated with the longwave trof over the eastern U. Not expecting any airmass changes with this surface trof so am using persistence as a guide for temperatures through the period. Carney Deepening upper level low to lift surface system towards Great Lakes region dragging strong cold front through region Thursday/Thursday night.
1051 AM CDT Wed Aug 2 2017 Expect shower/storm coverage to increase across the cwa through the afternoon as lift instensifies in response to the upper level trough dropping into the region. The 500 mb trough will strengthen over MN by Thursday morning with wrap around pcpn and gusty northerly winds expected in the eastern CWA.
An upper trough across eastern Indiana and Ohio will move to the east and weaken a little today.
Broad upper level troughing in place over the Central Great Lakes today with surface cold front over southern Lower Michigan serving as a focus for showers and thunderstorms.
Hot conditions prevail as a strong upper ridge remains positioned off the Pac NW coast.
724 AM EDT Wed Aug 2 2017 Aviation A weakening cold front will drop down from the northwest today and into Lower Michigan where it will dissipate.
Low pressure will develop across West Texas on Thursday and surface winds will veer to the south-southwest late this week.
The Interior Northwest will remain under a broad upper level ridge through at least tonight. The ridge axis is currently off the west coast and will remain there through the next 24 hours.
Very likely going to be a similar situation over the next couple of days as weak troughing over the eastern half of the CONUS helps to maintain increased cloud cover.
PW values remain below normal for early August and expect any afternoon showers or storms will be limited to the higher elevations. Based on the latest guidance adjusted these PoPs down but still have a 20 percent chance or so across the higher terrain. Chattanooga Airport, TN 86 68 88 69 / 10 0 10 20 Knoxville McGhee Tyson Airport, TN 85 67 86 67 / 10 10 10 10 Oak Ridge, TN 85 67 87 67 / 10 10 10 10 Tri Cities Airport, TN 84 62 85 63 / 10 10 20 20.
The overall pattern will feature an upper level ridge of high pressure across the western states with an upper level trof over the eastern part of the country. Slight chc pops were retained for the OK Panhandle for late tonight as a cold front begins to impinge on this area. Pops were spread south to encompass the whole forecast area on Thursday and Thursday night as the cold front slowly makes its way across the region.
The 500 mb trough will strengthen over MN by Thursday morning with wrap around pcpn and gusty northerly winds expected in the eastern CWA.
/issued 350 AM CDT Wed Aug 2 2017/ This morning an upper ridge is centered over the Great Basin while a broad trough remains over the Eastern US. The center of the ridge will shift west as trough spreads westward with area heights falling. Should be a few degrees warmer today but still in the 80s as a northerly wind veers around to the east late in the day.
Previous weak surface frontal trough across the south-central FL peninsula has quietly advanced northward overnight and lies across north-central FL. The Atlc high pressure ridge axis will retreat northward from the FL Straits to south-central FL by late in the day.
1053 AM CDT Wed Aug 2 2017 Expect shower/storm coverage to increase across the cwa through the afternoon as lift intensifies in response to the upper level trough dropping into the region. The 500 mb trough will strengthen over MN by Thursday morning with wrap around pcpn and gusty northerly winds expected in the eastern CWA.
753 AM EDT Wed Aug 2 2017 Update A weakening cold front will drop down from the northwest today and into Lower Michigan where it will dissipate.
Some Very Heavy Rainfall Possible From Bay Area North Satellite imagery and surface observations show a weak area of low pressure along a frontal trough west-southwest of Cedar Key early this morning. This abundant tropical moisture combined with enhanced low level convergence and instability along the frontal trough will support effective rainfall making processes from the I-4 corridor north the remainder of today where bouts of torrential rains and embedded thunderstorms will be possible. A weak area of low pressure along a frontal trough west of Cedar Key will help to increase southwest winds over the central and northern waters as the day continues with cautionary conditions likely developing from Englewood north to the Suwannee River out 60nm during the afternoon where Cautionary headlines will be posted, with southwest winds in the 10 to 15 knot range expected further south.
746 AM EDT Wed Aug 2 2017 Dry high pressure will prevail today.
Canadian cold front has moved through Central Montana and will continue to move through Southwest Montana today. Behind the front, much cooler temperatures and higher humidity will bring a much needed break from the summer heat.
1047 AM CDT Wed Aug 2 2017 A weak trough of low pressure will drift across the area today and tonight. Additional scattered showers and thunderstorms are also possible across northeast Missouri and western Illinois ahead of the trough and approaching short wave that will impact the area this today. Kelly A weak trof of low pressure at the surface will drift across the area today and tonight. This trof combined with cyclonic synoptic flow aloft associated with the longwave trof over the eastern U. Not expecting any airmass changes with this surface trof so am using persistence as a guide for temperatures through the period. Carney Deepening upper level low to lift surface system towards Great Lakes region dragging strong cold front through region Thursday/Thursday night.
The increase in cloud coverage and rain chances will lead to a relatively cooler temperatures by Thursday.
With the clouds and cold advection in the low levels expect a cool day across the area with breezy northerly winds gradually tapering off this afternoon. A cold front was moving S and was through KGTF at 08Z. This higher CAPE will be accompanied by greater than 30 kt of bulk effective shear. It will be windy today behind the cold front and will highlight this in the FWF.
634 AM CDT Wed Aug 2 2017 Northwest low-level flow will actually bring slightly warmer air into the area today, with a pocket of 850 hPa temps near 17 to 18 C spreading in from Nebraska and the Dakotas. This warmer airmass allowed those areas to rise into the middle to upper 80s yesterday and similar readings are expected across our area today. This activity will develop ahead of a cold front currently over the northern High Plains which will eventually track into eastern KS and northern MO Thursday evening and afternoon.
427 AM PDT Wed Aug 2 2017 August will begin with much warmer than average temperatures.
Right now it looks like the highest chances will be across southwest MN late tonight. On Thursday, the upper level low shifts through MN during the day, and may have some lingering showers from the I-29 corridor eastward in the morning, with a threat remaining over southwestern MN into the afternoon.
Strong high pressure over the region will maintain well above average temperatures across the interior through late week. Temperatures in coastal areas are expected to remain cooler as a result of the marine influence. WV satellite loop clearly shows moisture streaming in from the southeast that is rotating around a strong ridge of high pressure centered over Nevada. Temperatures will retreat a bit by the end of the week as the ridge starts to weaken and the flow becomes more onshore. SFO Bridge Approach. Thermal low pressure covers much of the western states and extends out into the coastal waters.
Surface wise, an east-west oriented ridge is locked in across our area, resulting in southeast to south winds of less than 10 knots on our entire marine district. A sharp, amplified and deepening, east-west oriented western Atlantic ridge will result in strengthening anticyclonic flow across our entire region. Plenty of strong insolation will allow high temperatures to climb into the lower 90s with light southeast winds. With the close proximity of the subtropical ridge axis, southeast to south winds of 10 knots or less will prevail on all Keys coastal waters.
A trough remains in place across the central coastal waters with a weak area of low pressure in place along the boundary well offshore. This trough will lift north today as high pressure builds into southern FL, and deep moisture lifting over the area as a result of this will allow for scattered to numerous showers and thunderstorms through the day. Will be monitoring that weak area of low pressure along the trough as it lifts to the NE toward the FL Big Bend through the day, but do not expect anything except an increase in winds over the northern coastal waters for today. For tonight and Thursday, the trough and high pressure ridge axis will both continue to lift north across the area through the period, gradually turning SW winds to the E/SE, with an afternoon sea breeze Thursday.
much cooler temperatures are anticipated for today with mostly cloud skies into the afternoon hours. Cold front will continue to move south across the forecast area this morning. High pressure will build into Central and Eastern Montana this afternoon which will diminish the showers from west to east across the forecast. High pressure will bring clear to partly cloudy skies to the forecast area tonight with overnight lows that will be the coolest since late June with some locations in the upper 40s. The high pressure system remains over the area on Thursday with NW flow aloft continuing. Look dry weather and cooler than normal temperatures with highs in the 70s in most areas.
Light northeast to east winds were occurring near the surface with southeast to southwest winds just above the surface in the lower levels.
1050 AM MDT Wed Aug 2 2017 The first of two cold fronts has tracked across the CWA east of the divide earlier this evening. Temperatures will be around 10 degrees cooler today east of the divide except 15 degrees cooler in Johnson County. This front will feel the coolest as post frontal northerly winds this morning make it seem cooler.
A warm front across central Florida will begin to lift back north today through Thursday as a warm front brining an increase in shower and thunderstorm coverage.
1016 AM EDT Wed Aug 2 2017 High pressure will remain offshore through the end of the week.
1030 AM EDT Wed Aug 2 2017 Dry high pressure will prevail today.
1057 AM EDT Wed Aug 2 2017 High pressure continues sliding eastward through Thursday with gradually increasing moisture.
603 AM EST Sun Dec 3 2017 An upper level trough will swing across the area today accompanied by high and mid level cloudiness. High pressure returns for tonight and Monday.
Chattanooga Airport, TN 66 43 66 54 / 0 0 0 20 Knoxville McGhee Tyson Airport, TN 63 40 66 50 / 0 0 0 10 Oak Ridge, TN 62 40 64 51 / 0 0 0 20 Tri Cities Airport, TN 61 34 62 43 / 0 0 0 10 NC.
High pressure will build north of the region today, with winds becoming northeasterly and increasing, which will hold temperatures down along the coast from near 70 to the lower 70s. Winds will become northeasterly and increase to around 10 knots by the afternoon as high pressure builds to the north.
612 AM EST Sun Dec 3 2017 Dry high pressure building across the region today will move offshore late Monday.
An upper trough was exiting east away from NWRN CA Sunday morning, with strong height rises occurring in its wake. This will yield an amplifying ridge adjacent to the west coast, with large-scale subsidence aiding in the dissipation of lingering shower activity by Sunday afternoon. Though valley fog will be possible tonight, radiational cooling is expected to be strong enough such that sub-freezing temperatures will be probable across much of interior Del Norte and Humboldt counties. Closer to the coast, slightly warmer temperatures will favor frost development (prompting the issuance of a frost advisory).
549 AM EST Sun Dec 3 2017 High pressure will lead to continued dry and mild conditions today into Monday.
Meanwhile, local radars are only detecting a few showers on the distant waters beyond 20 nm south of the Lower Keys. Surface wise, a large and region of high pressure is located over the eastern United States and the Florida peninsula. A Deep layered anticyclone extending from the Gulf of Mexico to across the Sunshine State will ensure limited moisture across our region.
521 AM CST Sun Dec 3 2017 Clear skies prevailing over the forecast area early this morning, courtesy of high pressure over the Midwest.
An upper trough to our west will move through the region today. A southwest-northeast oriented band of precipitation associated with the trough, situated between Boise and Baker City, will continue to slowly shift eastward through southwest Idaho today. Snow levels will fall to near valley floors behind a cold front. Winds will also increase behind a cold front, becoming very windy across portions of south-central Idaho from east of Boise into the Western Magic Valley and Southern Twin Falls County. Scattered snow showers will continue this evening, mainly in the higher terrain of southwest Idaho where additional light snow accumulations are possible. Drier northerly flow arrives on Monday as an upper ridge develops off the west coast.
A cold front is moving across the region this morning causing snow even in the valleys.
/issued 332 AM CST Sun Dec 3 2017/ Much above normal temperatures will continue today through Monday with mainly zonal flow aloft continuing across the region with low level thermal ridging in place.
An approaching cold front will bring gusty southwest winds and periods of high clouds today. The cold front will move across the area tonight.
/issued 417 AM CST Sun Dec 3 2017/ SHORT TERM (Now through Monday): Dense fog is once again the issue for the early morning hours with the lowest vsbys confined to the Brooks/Kenedy and inland Willacy counties. A warmer S-SE low level flow will prevail throughout today and Mon which will increase WAA steadily over the RGV resulting in a continuation of temps well above climo for early Dec. Will go with max temps today and Mon on the warmer side of guidance. But expect the low level WAA to make up for any loss of diurnal heating.
A upper level trough will exit today. High pressure will gradually strengthen during the workweek. This will bring dry weather to the region with fog likely in the lowlands. Showers will taper off this morning as an upper level trough over the region shifts east and exits. The cooler air mass will keep temperatures a few degrees below normal - highs mainly in the lower to mid 40s. This is due to a strong upper level ridge that will build over the Pac NW.
922 AM EST Sun Dec 3 2017 Ridging aloft is holding over the Gulf of Mexico and Florida this morning with a fairly weak pressure pattern at the surface.
/Issued 319 AM CST Sun Dec 3 2017/ Two more days of unseasonably warm temperatures are expected before a cold front moves through Monday afternoon into Monday night dropping temperatures back to more of what is expected in early December. This is in advance of cold front that is expected to move across eastern Oklahoma and western Arkansas Monday Afternoon/Evening. Showers and thunderstorms are expected to develop in the vicinity of the cold front as it moves through the region.
Mesoscale models have trended slightly cooler (not as warm) for afternoon highs across the northern counties, where the forecast highs have been paired back slightly for today. The surface cold front is shown to enter our western counties as early as around 12 UTC, and move rapidly though the area by late morning.
The front is well off to our east, but considerable showers remain over the area this morning as the parent upper trough moves through. An upper ridge begins building just off the coast Monday and then strengthens and becomes centered right along the coast through the remainder of the week. Despite the strong ridging, clearing skies, limited to no mixing, and long December nights will bring cold low temperatures tonight and then again Monday night. A very cold trough of low pressure moving through early this morning is expected to keep ceilings at the primary airfields mostly in the MVFR to local IFR range in showers, and VFR to MVFR outside of showers.
Another mild day is in store for the region today, but a potent winter storm will be developing out over the high plains that will bring a significant change to the weather for the area. The weak ridging over the area this morning will gradually give way to increasing southeast winds and clouds, with temperatures fairly similar to yesterday. Surface temperatures will be near to just above freezing, so it will produce a mixed bag of precipitation types along the Canadian border, with rain farther south.
SHORT TERM (Now through Monday): Dense fog is once again the issue for the early morning hours with the lowest vsbys confined to the Brooks/Kenedy and inland Willacy counties. A warmer S-SE low level flow will prevail throughout today and Mon which will increase WAA steadily over the RGV resulting in a continuation of temps well above climo for early Dec. Will go with max temps today and Mon on the warmer side of guidance. But expect the low level WAA to make up for any loss of diurnal heating.
928 AM EST Sun Dec 3 2017 An upper level trough will swing across the area today accompanied by high and mid level cloudiness. High pressure returns for tonight and Monday.