Aikyam-Lab/Synoptic-Bench huggingface dataset:
Sub-freezing are expected on the ern half of the high traversing ncntl Neb. The arctic high will move into the srn plains, low pressure will reform on the nrn high plains and this should set up a warming trend for Wednesday. Dry weather will persist from Wednesday through the weekend as high pressure remains over the central US.
1003 AM EST Tue Nov 21 2017 Three cold fronts cross through the Mid Atlantic region this week.
Expect a break as a ridge begins to build over the region. This moisture will slowly diminish during the day on Wednesday as the ridge continues to amplify, effectively shifting the moisture well north.
A weak upper level trough will be on the move out of the Gulf of Mexico and across the Carolinas today while another cold frontal boundary will be building southeast out of the Midwest states.
Sly winds ahead of the fnt wl help highs today to top out in the lower and mid 60s. Another round of much cooler/drier air wl move into the region for Wed/Wed night.
High res models suggest a band of showers will also spread southward across the Palmer Divide and portions of the southeast plains early this morning, along/behind another cold front which will move through early this morning. Temperatures today will be quite a bit cooler than yesterday by around 15 degrees or a little more across the plains, with readings around 3-5 degrees cooler out west. Building upper ridge will approach from the west overnight with surface lee trof redeveloping and westerly drainage winds setting in overnight. Should see another round of wave cloudiness spread in overnight which may help keep temperatures slightly warmer as well, particularly near the mountains.
Warming southerly winds will increase in return low-level flow by Wednesday while an amplified ridge builds over the western CONUS.
Expect the lower vis to continue through sunrise, therefore, short tempo group was added to reflect the lower vis this morning. Over the Gulf of Mexico, the amplifying mid-level trough shifts eastward with associated clouds and convection. Slightly warmer temperatures and additional cloud cover are also expected today.
/Issued 410 AM CST Tue Nov 21 2017/ A cold front will push through all of the Panhandles early this morning with winds shifting to the north and increasing to around 15 to 25 mph or 20 to 30 mph with gusts near 35 to 40 mph by mid to late morning. A dry northwesterly to northerly upper flow will prevail across the forecast area today through the weekend as an upper high dominates over northwest Mexico and Baja California.
A weak short wave trof will approach Alabama this afternoon. Increasing low level southerly flow today will push temperatures into the lower and middle 60s. Low level wind flow will become northwest this evening as the short wave trof passes to the north of Alabama, and drier air will advect back into the area.
528 AM EST Tue Nov 21 2017 Upper air pattern consists of a 500 mb ridge on the west coast, a trough on the Gulf Coast, a trough dropping into the upper Great Lakes this morning. This trough digs into the lower Great Lakes tonight. Main threat from this system will be gusty winds (possibly approaching advisory criteria in some spots) both ahead of and behind the low, but details with that will be dependent on track and strength which are both still in question. A strong low pressure system will track eastward just north of Lake Superior this morning.
Locally Heavy Rainfall Possible Along the Space and Treasure A quasi-stationary boundary over the Treasure Coast is beginning to move slowly to the north as a warm front. Enhanced lift on the ascendant side of the mid/upper level trough and from the right entrance region of an upper jet should generate scattered to numerous showers from mid to late afternoon, along with some deeper convection (thunder). A warm front will lift north over the waters today, shifting winds from the east to the southeast and generating scattered to numerous showers and isolated thunderstorms.
406 AM CST Tue Nov 21 2017 Early morning sfc analysis shows high pressure holding on over the region, centered off the Carolina coast and ridging swwd to the wrn Gulf region. Meanwhile the system crossing the Great Lakes today is progged to drive our next cold front. No significant changes thereafter with our Thanksgiving weather still looking dry but chilly as nrly flow again develops aloft and high pressure builds over the region at the sfc. Morning wake up temps are expected to be around freezing across the nern 1/4 of the area, with readings in the mid/upper 30s elsewhere. In our progressive pattern, high pressure will quickly build past the region, allowing for a brief warmup before another front slides through over the weekend.
410 AM CST Tue Nov 21 2017 A cold front will push through all of the Panhandles early this morning with winds shifting to the north and increasing to around 15 to 25 mph or 20 to 30 mph with gusts near 35 to 40 mph by mid to late morning. A dry northwesterly to northerly upper flow will prevail across the forecast area today through the weekend as an upper high dominates over northwest Mexico and Baja California.
945 AM EST Tue Nov 21 2017 High pressure will move off the coast today. A cold front will move through Wednesday morning.
954 AM CST Tue Nov 21 2017 Wind speeds continue a slow decrease this morning, with the highest gusts currently over the southern FA. 09z sfc map shows low pressure east of Dryden Ontario.
/Tonight through Monday/ Strong southwesterly flow to continue in the low levels tonight ahead of a stronger cold front to drop through the state early Monday morning through mid-day Monday. Therefore temps to remain mild overnight with lows in the low 60s north to mid/upper 60s south.
Surface analysis this evening places a ridge of high pressure centered over the Tennessee Valley.
A cold front has moved into northwest Minnesota and warm southwest winds were occurring across the Northland ahead of it.
Low temps should range through the lower 60s. A cold front will approach the region Mon night bringing a broken line of showers/storms to the region. The cold front will slowly push southeast through central/southern KY on Tues with showers/storms possible closer to the front and likely a post-frontal band of showers developing during the day Tues over much of central KY/southern IN. Rain/clouds should keep temps at bay in the lower 70s for highs Tues.
There is a cold front posted to the north across the northern Plains today. The front ushers in cooler air Monday, with highs in the upper 70s behind it, but still the upper 80s ahead of it.
Radiational fog could become an issue late tonight through sunrise as we lose the higher based clouds and keep the winds light.
1144 PM CDT Sun Sep 3 2017 Quiet aviation weather can be expected for the next 24 to 36 hours as weak ridging and subsidence persists aloft.
Temperatures will turn much cooler for the first half of this week, as an airmass out of Canada sinks south into the region.
730 PM EDT Sun Sep 3 2017 High pressure will settle over the region tonight, and then shift offshore Monday, bringing warmer weather.
A cold front crosses Monday night bringing showers and storms. Thereafter, a cold front approaches in from the Great Lakes during the night.
645 PM CDT Sun Sep 3 2017 The short term concern remains timing of incoming cold front and convective potential with it and the upper trough for Monday afternoon. Still looks like the cold front will be dropping close to a KRCX- KMSP-KMKT line around 06z. With the cold upper trough moving over the area Monday, scattered showers and isolated thunder look to be a good threat over much of the central and east, mainly in the afternoon.
853 PM EDT Sun Sep 3 2017 High pressure will move in this evening and provide fair and warm weather for Labor Day.
West winds behind this trough across the western Sandhills with dewpoints falling into the upper 30s to mid 40s. A cold front will drop south overnight, which should help to disperse the smoke. An amplified upper ridge will be in place across the western U. as a trough extends south from the Great Lakes into the Tennessee Valley.
A weak upper low will remain over the area through the end of the period, which could result in more isolated showers during the daytime hours of Monday. Despite plentiful solar insolation /temps having warmed into the upper 80s to lower 90s late this aftn/, the precip activity will be limited in strengthening given the weak UL trough and a relatively dry atmosphere in place /PWATS of 1.
/issued 333 PM CDT Sun Sep 3 2017/ (Tonight and Monday) Upper level low has dropped south across the border and now is spinning away just west of Del Rio this afternoon. Residual low level moisture from last nights rainfall, along with mid and upper level moisture and lift from the upper low should be enough to generate isolated showers and storms across about the southern half of West Central Texas late this afternoon and early this evening. Otherwise, temperatures should be a little warmer than the readings we are seeing today, but will remain at or a little below normal for the first week of September.
754 PM EDT Sun Sep 3 2017 High pressure will build in south of the region tonight through Monday.
629 PM CDT Sun Sep 3 2017 Weak cold front has pushed through the forecast area this morning leaving dry and warm conditions for this afternoon and evening. The light southwesterly winds will begin to increase late morning into the early afternoon as a new cold front pushes its way into the region. Cold front is expected to exit the CWA by 0600 UTC, with a band of frontogenetically enhanced showers possible moving from north to south very late Monday night.
Latest surface analysis shows cold front now across the northern Plains, making progress south and east. Southwest winds on Monday will help temperatures climb into the low to mid 90s.
748 PM EDT Sun Sep 3 2017 Weak high pressure through Labor Day. Strong cold front midweek. Cooler behind front for the balance of the week. Weak high pressure lingers through Monday. A strong cold front approaches Monday night.
Upper trough continues to lift through the Mid-Atlantic states tonight with weak and brief upper ridging nudging back over the region from the W Atlantic Monday.
Monday should remain dry across Central AL as ridging remains in place in the lower levels.
1158 PM CDT Sun Sep 3 2017 Weak cold front has pushed through the forecast area this morning leaving dry and warm conditions for this afternoon and evening. The light southwesterly winds will begin to increase late morning into the early afternoon as a new cold front pushes its way into the region. Cold front is expected to exit the CWA by 0600 UTC, with a band of frontogenetically enhanced showers possible moving from north to south very late Monday night.
For much of the upcoming work week, a typical summertime pattern looks to prevail as high pressure builds back in from the northeast.
Cooler towards the end of the week as an upper level trough begins to move in. However, recent GOES-16 imagery shows drier air filtering in from the south, especially in the low to mid levels.
717 PM CDT Sun Sep 3 2017 Main concerns during this period are with Monday temperatures, and timing of thunderstorm activity with the cold front. Strengthening cold front currently over the Northern Plains will be moving into northern parts of the CWA by midday Monday. Main focus the remainder of the work week remains with the shift to a much cooler weather pattern, as a long wave trough digs southward across the Midwest and Mississippi Valley. This trough will be slow to exit, but the western ridge is expected to finally nudge it eastward toward the first part of the weekend.
Winds will begin to slowly increase from the southwest during the day Monday in advance of next cold front Monday night. Latest surface analysis shows cold front now across the northern Plains, making progress south and east. Southwest winds on Monday will help temperatures climb into the low to mid 90s.
Colder air behind a cold front will move south across the area tonight through Monday night. The cold front will bring colder air, gusty north to northeast winds and higher relative humidity.
Strong high pressure aloft and the associated warm temperatures will remain locked in over the Intermountain West through at least midweek. Strong high pressure aloft now established across the interior west will maintain very warm temperatures the next several days, with the warmest reading early this week. A fairly strong surface cold front moving west across Wyoming on Monday will settle into far northern through northeast Utah Monday evening.
951 PM CDT Sun Sep 3 2017 High pressure over the lower Mississippi Valley extended into Southeast Texas this evening. /ISSUED 328 PM CDT Sun Sep 3 2017/ Climatological conditions will continue for the next couple of days with highs in the low 90s everywhere but the coast and a weak sea breeze providing very isolated afternoon showers.
/issued 249 PM CDT Sun Sep 3 2017/ A highly amplified pattern will develop this week characterized by ridging in the west and troughing in the east.
643 PM CDT Sun Sep 3 2017 Another hot day is anticipated across much of the area on Monday before a strong cold front arrives late in the day and into the evening and overnight hours. There are no concerns until late Mon morning (15-17Z) when a strong S/SE-movg cold front is scheduled to arrive central KS.
By mid week, the ridge of high pressure that has remained over the Great Basin for the past several days will begin to break down and slowly shift to the east. This is in response to a trough digging into the eastern Pacific and inducing an upper low off the southern California coast. Expect increased moisture to move into the area and cooler temperatures from mid week onward as the pattern gradually shifts.
After a warm Labor Day, the frontal passage will bring much cooler temperatures in behind it for much of the week.
639 PM CDT Sun Sep 3 2017 Warm and humid conditions will come to an ed across the region tonight as strong cold front moves through the region.
A weak upper trough over the area may result in a few isolated showers during the daytime hours, but any development is expected to be very spotty. /issued 1002 PM CDT Sun Sep 3 2017/ The isolated convection that developed earlier this afternoon has waned with the loss of heating, although the even water vapor imagery still depicts a weak shear axis and accompanying weak closed low over extreme Ern TX. Still seeing some cu development attm across portions of SW AR on the N side of the shear axis, but believe these should diminish overnight even as the weak closed low lingers overnight through much of Monday over extreme Ern TX. A weak upper low will remain over the area through the end of the period, which could result in more isolated showers during the daytime hours of Monday.
CAP strength is slowly eroding near the low and scattered strong thunderstorms remain possible over northcentral MN through early evening. Short wave will send cooler air into the area tonight and Mon. Water vapor loop indicated an upper level ridge was rotating through the area. Gusty northwest winds may be possible this evening as cooler air moves into the area. 500 hpa height falls mainly over southern Canada today will shift south into the area Mon morning as BC short wave digs into the area and concurrent ridge building occurs over western North America. It will remain dry through the end of the week as an upper ridge builds into the northern high plains and high pressure at the sfc sits over the Great Lakes.
Expect some widely scattered showers tonight during the overnight hours, spreading south from Canada behind a southward moving cold front. Monday will feature much cooler temperatures behind the cold front, with most areas barely reaching the low 70s.
There is a cold front in the Dakotas this afternoon and it will be moving to the south through the night. The north winds should mix things enough to keep the lower visibilities from becoming an issue across the forecast area. The cold front should be well through the forecast area by mid day on Monday. This brings a concern for the high temperatures. The cold front will be in southern Kansas by Monday evening.
Temperatures trend cooler on Monday, with high temperatures near 70 for North-central Montana, and near 80 for the southwest.
Upper level trough axis will continue to lift away from the east coast this evening, with high pressure at the surface remaining stagnant across the region.
Winds will begin to slowly increase from the southwest during the day Monday in advance of next cold front Monday night.
Meanwhile, low pressure developing across the northern Plains will move into Wisconsin on Monday and this will force a strong cold front south through the area during the day. The thermal ridge ahead of the front along with pre frontal compression/downslope should help highs reach into the 90s ahead of the front with some weak CAA expected by afternoon across the north. Beginning Monday evening, most short range and longer term guidance solutions have converged on a consensus solution of the cold front being pushed through the northeastern KS exiting the region by 00- 03Z time frame. This will still provide a strong push of the low level cold front initially then wane with time as the overall trough pivots east of the area.
904 PM EDT Sun Sep 3 2017 Weak high pressure will keep us dry through Monday.
719 PM EDT Sun Sep 3 2017 High pressure will build across the Southeastern States through Monday bringing dry air and near normal temperatures.
High pressure will begin to build across the region Monday. However, low-grade monsoon moisture trapped under the ridge will result in continued chances for terrain-driven showers and thunderstorms each afternoon through the week.
This is due to a cold frontal passage on Monday, Monday afternoon, that will bring cooler temperatures and increased winds as well. The remainder of the period will be dry due to persistent northwest flow over the CWA and a ridge dominating the western CONUS; keeping moisture west and south of the region.
1235 AM EDT Mon Sep 4 2017 High pressure will move in this evening and provide fair and warm weather for Labor Day.
624 PM CDT Sun Sep 3 2017 Large amplitude pattern in place across the CONUS this afternoon with a large area of high pressure across the western U. and a trough across the northeastern U.
738 PM EDT Sun Sep 3 2017 High pressure will build across the Southeastern States through Monday bringing dry air and near normal temperatures.
1021 PM EDT Sun Sep 3 2017 Weak high pressure through Labor Day. Strong cold front midweek. Cooler behind front for the balance of the week. Weak high pressure lingers through Monday. A strong cold front approaches Monday night.
A cold front will slide southeast through the area Monday morning into early afternoon, with winds veering to the northwest behind the front by later in the day. Medium Mild and quiet night ahead as southwest winds strengthen ahead of an approaching cold front. The somewhat warmer 3 hourly mos temp guidance looks pretty good. Medium Aforementioned cold front slides through mid/late morning with warm thermal ridge out ahead so temps will rebound pretty quick before the front. The vorticity is also rather strung out/channelized as the mid level trough starts to carve into the area.
523 PM MDT Sun Sep 3 2017 Water vapor shows large upper ridge covering the western CONUS, with northwest flow aloft carrying smoke through the Northern Plains. At the surface, low is centered over eastern ND with surface trof extending through central SD, and cold front extending into southeast MT. Red flag conditions continue to spread east across the cwfa within the hot/dry airmass ahead of the cold front. Cold front will push through the region tonight, and usher in much cooler air that will continue into the middle of the week as flow aloft becomes more northerly.
Although these winds may diminish some this evening, a secondary cold front will push through overnight once again increasing the winds. One other note is that in the wake of the cold frontal passage, air temperatures will be quite a bit cooler for Monday with highs in the 70s.
1002 PM CDT Sun Sep 3 2017 The isolated convection that developed earlier this afternoon has waned with the loss of heating, although the even water vapor imagery still depicts a weak shear axis and accompanying weak closed low over extreme Ern TX. Still seeing some cu development attm across portions of SW AR on the N side of the shear axis, but believe these should diminish overnight even as the weak closed low lingers overnight through much of Monday over extreme Ern TX. A weak upper low will remain over the area through the end of the period, which could result in more isolated showers during the daytime hours of Monday.
1207 AM EDT Mon Sep 4 2017 After a warm Labor Day, A cold front will bring rain tonight, and will usher in below average temperature for the remainder of the week. No changes were needed for the overnight prognosis as high pressure completes a slide across the Upper Ohio Region in response to a low digging hard to the north of the Great Lakes. That system will back upper flow over the region to the west, then southwest this afternoon and intensify warm advection in advance of the associated cold front. The low is projected to continue digging with an eventual cut- off center over the James Bay by tonight, with the mid level trough axis and surface front sweeping toward the Ohio Valley.
High pressure will continue overhead tonight, but begin to shift offshore by late Monday.
1039 PM CDT Sun Sep 3 2017 Warm and humid conditions will come to an ed across the region tonight as strong cold front moves through the region.
/ISSUED 951 PM CDT Sun Sep 3 2017/ High pressure over the lower Mississippi Valley extended into Southeast Texas this evening. /ISSUED 328 PM CDT Sun Sep 3 2017/ Climatological conditions will continue for the next couple of days with highs in the low 90s everywhere but the coast and a weak sea breeze providing very isolated afternoon showers.
One notable change for Monday and later, is a shift in the low-level wind direction to the north-northeast on Monday.
939 PM EDT Sun Sep 3 2017 High pressure will settle over the region tonight, and then shift offshore Monday, bringing warmer weather.
High pressure at the surface will overall remain in control of our weather over the next 24 hours. Temperatures will be a couple of degrees warmer tonight and Monday.
This afternoon temperatures are rising into the mid to upper 80s however, even warmer temperatures are expected tomorrow with modest WAA out ahead of an approaching cold front. However, further south, temperatures will rise into the lower 90s. That and convergence along the cold front may be enough of a catalyst for thunderstorm development south of I-70.
Weak high pressure from the Atlantic extending west across the south-central peninsula will maintain tranquil boating conditions with light winds and slight seas over the Gulf waters the remainder of tonight.
Axis of low level ridge will nudge northward as frontal trough to the north weakens.
1013 PM EDT Sun Sep 3 2017 High pressure will build across the Southeastern States through Monday bringing dry air and near normal temperatures.
1130 PM EDT Sun Sep 3 2017 High pressure will move in this evening and provide fair and warm weather for Labor Day.
A strong cold frontal passage will occur on Monday, first over the northern zones in the morning, and then reaching the I-80 corridor during the early afternoon.
1056 PM EDT Sun Sep 3 2017 Late evening surface analysis depicts a decaying frontal boundary over southeast Georgia, with high pressure (1022 millibars) stretching from the Tennessee Valley to the Carolinas. Deep layered Atlantic ridging will continue to slowly lift northward on Labor Day, with the lingering dry air mass over southeast Georgia scouring out during the afternoon hours as low level flow becomes more southerly. High pressure centered to the north of our region will slide eastward on Monday, keeping light onshore winds in place for Labor Day, except near the coast in the afternoon as the Atlantic sea breeze increases winds to 10-15 kts.