Aikyam-Lab/Synoptic-Bench huggingface dataset:
409 PM EDT Sun Sep 17 2017 There is a chance of showers and a few thunderstorms tonight as a cold front slowly approaches the area.
Tonight and Monday Showers exited Wisconsin as a cold front pushed east of the state. Monday Night Through Sunday Temperatures will warm through the work week with mid level ridging and height rises bring warmer temperatures to the western Great Lakes. for 18Z TAF Issuance Mainly VFR conditions behind a departing cold front.
1127 AM MDT Sun Sep 17 2017 Latest analysis shows upper low over SK/MB swinging an upper trough across the eastern Dakotas and yet another weak upper trough over the western CONUS. At the surface, cool high pressure is centered over SD.
325 PM MDT Sun Sep 17 2017 As on weak trough exist the region to the east, carrying some remnant showers with it, drier westerly flow with another weak embedded trough will pass over the area this evening. Almost nothing in the way of precipitation is expected from this second trough, just some mid and hi cloud over the northern half of the area. Monday should see dry westerly flow aloft and warmer temperatures from abundant sunshine, followed by a cool clear night.
As Jose moves away, a high pressure will build southward and locally at the Keys, the pressure gradient will remain weak for the next few days, keeping light and variable winds. Temperatures will continue in the upper 80s to near 90 during the day with lows in the low to middle 80.
308 PM CDT Sun Sep 17 2017 PW values were approaching an inch and a quarter and the wind profile was pretty light in the lower atmosphere so stationary heavy downpours are likely. The boundary/upper trough axis may be the focus for some thunderstorm activity. Broad ridging early in the week should give way to some troughing, which could actually increase chances for rain and storms later in the week before another ridge builds back in.
The synoptic scale cold front is closeby, currently stretched from near the the WI/IL border, where it is more baroclinically oriented, and trailing into Missouri, where it becomes more difuse and parallel with the upper flow. A narrow mid level ridge (700 to 500 mb layer) will extend from the southern Plains northeast across the Ohio Valley to the eastern Great Lakes. This ridge will provide warm and mainly dry conditions through the period. At the surface, high pressure will be quasi-stationary along the Appalachian Mountains. This high will produce a light southeast to south wind flow of humid air.
135 PM EDT Sun Sep 17 2017 Dry weather is expected today as high pressure moves slowly east. A cold front approaching from the west may allow a few showers and thunderstorms to develop beginning tonight and continuing through mid week. Cold front will continue to weaken tonight through Monday as it moves into a less favorable airmass over Northwest Ohio. Under partly to mostly sunny skies, highs in the low 80s can be expected. This will allow a surface cold front to drop south into Northwest Ohio early in the week.
103 PM PDT Sun Sep 17 2017 A trough of low pressure will maintain below average high temperatures today, partly to mostly cloudy skies in the coast and valleys due to a deep marine layer, and gusty west winds in the mountains and deserts. A little warmer on Monday as low pressure weakens.
Moving on, a big warmup for today as the upper level trough axis will be moving east and will be aligned along the Atlantic coast. Despite remaining clear, overnight lows will only dip down into the lower 50s for most areas. A cold front will move through the area beginning in the northwest around midday, with the boundary reaching our easternmost Plateau Friday evening.
The associated cold front is approaching the US border near Idaho and has around a 15 degree drop in temperatures with the fropa. Guidance numbers here have the largest spread in agreement and siding with the cooler numbers attm. high amplitude trough and ridge pattern across NOAM.
High pressure will build over the region with sunny and cool conditions continuing along with below normal temps. Highs still only expected to reach the lower 70s today and Lows tonight will fall into the 40s once again over inland areas while a light onshore flow will hold the beaches in the 50s late tonight.
The area does lie south of an approaching cold front which is currently draped across the northern Plains. Looking for first widespread hard freeze with temps dropping into the lower and mid 20s. the area will only reach into the lower and mid 40s for highs. the region will see normal numbers for temps with surface ridging off to our ESE and H5 ridging over the Rockies providing downslope mid level flow. with lows in the lower to mid 30s.
1124 PM MDT Wed Oct 25 2017 Upper ridge covers the western CONUS, and a deep trough continues to dig into the east coast. Strong upper wave will push into the northern plains tonight with a cold front, bringing strong winds and some rain/snow showers. An upper ridge will build again over the western CONUS Friday into the weekend.
Daytime max temperatures will be slightly warmer today as high pressure builds back in across the region. Ridging will result in continued dry conditions through Friday. Winds will shift to the southwest as the ridge axis transitions east of the forecast area and warm air advection increases ahead of the next frontal system approaching from the west. resulting in much warmer temperatures.
Strong Cold Front Arrives Tonight With A strong cold front that we are watching is currently through western South Dakota this morning and will be arriving in the Ozarks Region by this evening.
A strong cold front will pass through the terminals during the day bringing a northerly wind shift and gusty winds. /issued 241 PM CDT Wed Oct 25 2017/ The anticipated surface cold front will arrive tomorrow around noon across our northern counties in the southern Texas Panhandle, through the South Plains by mid-afternoon and then I-20 corridor by tomorrow evening. Once the surface cold front moves through, the reinforcing cooler air advects southward from the Central Plains with highs struggling to reach the low 50s across our latitude Friday afternoon.
357 AM EDT Thu Oct 26 2017 High pressure will prevail into late week.
Easy headlines were the high wind warning for the valley and west and the winter storm warning for Lake of the woods region with snow totals greater than 6 inches as deformation zone band produces persistent snow during the day into the evening. These lighter rates combined with road surface temperatures that are expected to remain well above freezing during the daytime per METRo roadcast models will limit slippery surfaces as snow melts on contact with paved surfaces. As the deformation zone slides to the south and bands wrap to the southwest this evening cooler air and loss of solar will allow snow accumulation across the MN lakes country.
Currently, a ridge aloft is pulling in warmer and drier air into the region.
An upper level trough can be seen in WV and IR satellite imagery this evening over the eastern CONUS. This trough will de-amplify and lift northeastward tonight. Temperatures will drop into the low 40s across much of the area by the early morning hours, so remember to grab a sweater or jacket tomorrow morning!. Low temperatures in the lower 40s will be widespread, with a few normally colder locations possibly dipping into the upper 30s. A slow warming trend will begin on Thursday as an low- amplitude upper ridge slides eastward over the area. By Friday night, the next large upper trough will dig into the Central U.
Combined with mostly clear skies and additional compressional warming ahead of the next cold front, high temperatures today should be above 80 degrees F areawide today. The aforementioned cold front will begin moving through the area early Friday morning. The greatest large scale forcing with the broad, positively-tilted upper trough will begin to move into the area by mid- to late-Friday morning.
/Issued 254 PM EDT Wed Oct 25 2017/ As the upper level trough shifts into the Mid-Atlantic coast, dry northwest flow aloft will set up tonight with nearly zonal flow tomorrow and tomorrow night. High pressure currently in place will begin to shift offshore on Friday ahead of a cold front.
High pressure over the Gulf of Mexico will continue sliding east tonight and tomorrow with winds gradually backing to the southwest to south near dawn Thursday. Latest forecasts continue to indicate the progression of a strong cold front, that will affect the forecast area on Friday.
Upper ridging in place this morning will provide clear skies through early to mid afternoon then expect increasing cloud cover through the latter half of the day in advance of the approaching low. A cold front will sweep across the area overnight, but no precipitation is expected, only a wind shift to the west.
A ridge of high pressure in the mid/upper levels, which is offshore between 130-140W early this morning, places the forecast area under the eastern flank of the ridge resulting in a northerly flow aloft today. Otherwise, highs through the period will be in the upper 50s to mid 60s in the lowlands and in the mid 40s to upper 50s in the highlands.
Weak upper ridging will build in from the west today. After a cool start with lows in the lower 40s, highs will reach the lower to possibly mid 70s.
107 AM EDT Thu Oct 26 2017 A strong upper level trough will move across the region with clouds and some showers, especially west of the Blue Ridge, through tonight. High pressure will then build over the southeastern part of the country with fair weather and moderating temperatures expected through the end of the workweek.
/issued 401 PM EDT Wed Oct 25 2017/ High pressure is building in behind the first cold front of the season to clear South Florida. Quiet weather will continue into Friday, with temperature rebounding back into the low 80's for most of the area.
644 AM EDT Thu Oct 26 2017 High pressure today into tonight.
This deepening system will fail to bring any rain chances but will push the strongest cold front so far this fall with well below temperatures to follow. The sfc pressure gradient should relax in the evening with the approach of the cold front.
High pressure continues to slide farther east with the approach of the next trough. Strong north flow is then expected to develop in wake of the front as cooler and drier air moves into the region.
The high pressure ridge responsible for record and near record high temperatures lately will shift westward and amplify along the west coast. This slight shift was in response to a low pressure trough deepening over the central United States the next few days.
Strong cold advection is underway, as high pressure in Alberta surges southward. Have cancelled the High Wind Warning for northern Sweet Grass and southern Wheatland but will let the highlight continue at Judith Gap as north winds funnel through the favored location.
355 AM CDT Thu Oct 26 2017 A strong area of low pressure crossing the region today through Friday will bring howling winds with gusts as high as 60 mph. As of 8Z, the surface cold front is pushing across the CWA with winds quickly increasing. This area will likely see the highest winds for the longest period of time.
550 AM CDT Thu Oct 26 2017 07z/2am surface analysis shows 996mb low over North Dakota, with warm front extending southeastward across Iowa/Missouri. With pressure gradient tightening in advance of a cold front dropping through the Plains, winds will reach 10 to 20mph with gusts to around 30mph this afternoon. Plains cold front will push eastward through the area tonight, reaching the Indiana border by 12z Fri. As an upper trough currently evident on water vapor imagery over southern Saskatchewan approaches from the northwest, increasing synoptic lift will lead to a band of post-frontal precipitation on Friday.
300 AM CDT Thu Oct 26 2017 A strong cold front was currently making its way through the northern Plains early this morning. Before this cold front arrives late this afternoon/evening, we will see something of a pre-frontal trough move through late in the morning.
Gusty northwest winds west of the low were at 15 to 30 mph, with some gusts over 40 mph. Currently, an upper level trough extended from Hudson Bay through the Great Lakes to the Gulf Coast, with a broad ridge was well- established over the Rockies. At the surface, low pressure was located over southern Saskatchewan with a cold front extending west along the international border. Rain and snow showers are forecast to develop, mainly north of the low. Considering the strong cold advection, along with being the favored area for additions by the fall-rise couplet, we have decided to upgrade the high wind watch to a high wind warning.
This high will move east of the area today, allowing for dry conditions through tonight. As a cold front moves into the area later Friday, rain is expected to develop Friday evening.
243 AM CDT Thu Oct 26 2017 Cold front now extending from central Nebraska into northwest Kansas is forecast to exist southward to southeast KS and western Oklahoma by midday.
302 AM CDT Thu Oct 26 2017 07z/2am surface analysis shows 996mb low over North Dakota, with warm front extending southeastward across Iowa/Missouri. With pressure gradient tightening in advance of a cold front dropping through the Plains, winds will reach 10 to 20mph with gusts to around 30mph this afternoon. Plains cold front will push eastward through the area tonight, reaching the Indiana border by 12z Fri. As an upper trough currently evident on water vapor imagery over southern Saskatchewan approaches from the northwest, increasing synoptic lift will lead to a band of post-frontal precipitation on Friday.
1150 PM MDT Wed Oct 25 2017 Aviation Section Updated The initial cold front shifting winds to northwesterly has passed through all but far southern portions of SW MT with a secondary surge of northerly winds and colder airmass presently continuing to push south into central MT this evening. Winds have largely shifted to the north across north-central MT and will remain gusty through late this evening, but gusts in excess of 50kts are no longer likely and the High Wind Warning has been cancelled.
There's the potential that overnight lows tonight may end up being slightly warmer than what we have in the grids. All the models are suggesting a 20-24C 850 mb layer moving across western Kansas with southwest winds at the surface ahead of an approaching strong cold front. Once the cold front passes mid tomorrow morning strong winds and falling temperatures will be the story for the CWA.
205 AM EDT Thu Oct 26 2017 Cool high pressure crossing the region will move offshore by Friday.
406 AM CDT Thu Oct 26 2017 A cold front arrives this evening, but not before westerly winds and very dry air cause near record highs today. However the timing of these winds and the surface heating needed to mix them to the surface will not be optimal as the approaching cold front causes winds to diminish later this afternoon during peak heating, so no wind warning will be issued for prefrontal westerly winds. Strong northeast winds are still expected at Guadalupe Pass behind the cold front and the High Wind Watch has been upgraded to a warning for tonight into early Friday.
A cold front currently moving across the Continental Divide into western Montana is producing some pretty gusty north- northeast winds. This cold front will exit southwest Montana by early afternoon.
245 AM PDT Thu Oct 26 2017 Cooler weather is forecast through the weekend, but temperatures will still continue above average.
A short wave is now moving out of the area, and an upper level ridge will rebuild Thursday, a bit west of the position it was in earlier this week. Another thermal trough will form under the ridge along or just off the coast, also a bit farther west than the previous one.
425 AM CDT Thu Oct 26 2017 The main story of today will be the cold front sweeping through the area leading to a widespread freeze tonight.
Much quieter period in store as our longwave trough pushes further east and out of the area. High pressure will build in behind this trough and will return us to more seasonable conditions. Highs today will rebound into the low to mid 60s, which only puts us 3 to 5 degrees below normal. Warmer tonight as well as temps will range from near 40 to the mid 40s. Because of the warmer overnight temps frost shouldn't be an issue.
The Lower Keys and west are under marine layer stratocumulus in the cooler air. The cold front the passed across the Keys last night is continuing on to the east southeast. The evening upper air data are drastically different than the previous night, and surface temperatures and dew points are a reflection of the drier and cooler continental air mass.
1132 PM MDT Wed Oct 25 2017 Minor update to cancel the high wind warning as winds have diminished over the warned areas. Even so, WYDOT obs have shown a few gusts around 55 MPH at BRX, and ARL is finally ramping up into the 40-50 MPH range with lee troughing taking place across eastern WY late this afternoon. The High Wind Warning will remain in effect until midnight. A strong cold front will sweep across the area from Thu AM through early afternoon. Snowfall amounts should be on the low side, around 1-2 inches for the most part.
446 AM EDT Thu Oct 26 2017 Low pressure will track north through eastern New England today into this evening bringing widespread light to moderate rain to areas from the eastern Adirondacks east into Vermont.
Complex weekend pattern as amplifying longwave trough deepens from the Great lakes into the Gulf of Mexico. At the surface, low pressure system in the NW Carib lifts NNE ward through the region while next cold front merges with the system and sweeps it into W Atlantic. High pressure moving across the Gulf will allow winds to diminish towards daybreak. The high moves to off the east U. Low pressure could move into the Gulf from the Caribbean.
637 AM EDT Thu Oct 26 2017 Cool high pressure crossing the region will move offshore by Friday.
Clouds will continue to exit the forecast area as a longwave trough pushes further east and high pressure begins to build in.
A pre-frontal trough will shift winds to the N around 10 kts 06Z-09Z on Friday. Much stronger N winds will surge into the area behind a cold front between 09Z-12Z Friday.
With the ridge axis shifting east over the area winds are starting to become onshore this morning with temperatures rising around 10 degrees over the past few hours at some coastal locations. Aloft a trough is over the east half of the country. Aloft a short wave will drop out of Canada and into the Central Plains along the back side of the upper trough. Friday, moisture will continue to increase as the Canadian cold front approaches.
415 AM CDT Thu Oct 26 2017 A northwesterly flow aloft will transition to southwesterly tonight as an upper level trough develops over the state. A cold front will move into Southeast Texas Thursday night and Friday morning.
649 AM EDT Thu Oct 26 2017 A ridge of high pressure extending across Se Mi this morning and afternoon will sustain light winds. Upper level ridge axis sliding overhead this afternoon should maintain mostly clear skies, outside of some high clouds. Latest water vapor imagery showing a strong upper level wave/trough entering North Dakota, with a full head of steam/momentum. This results in the moisture/cold front pushing east faster, reaching southeast Michigan late friday afternoon already.
A storm system will graze northeast Utah and southwest Wyoming Thursday, bringing cooler air to the region.
138 AM EDT Thu Oct 26 2017 Aviation High pressure will build in tonight with clearing skies and frosty temperatures.
Another round of very warm temperatures can be expected across our entire region today due to offshore flow and a ridge of high pressure in place.
245 AM EDT Thu Oct 26 2017 High pressure today into tonight.
150 AM EDT Thu Oct 26 2017 High pressure today into tonight.
Cold front is tracking across Montana into the upper Midwest, with minimal impact to our region other than isolated rain showers across the West Central Mountains near McCall. Temperatures will be slightly warmer today as a strong upper level ridge builds just off the Pacific NW coast, bringing mostly sunny skies and light winds.
430 AM CDT Thu Oct 26 2017 Early this morning a wave and associated cold front were advancing southeastward through the Rocky Mountain region and Northern Plains. The cold front is currently progged to enter into Northeast Oklahoma around the 21z time frame this afternoon. conditions look to clear out with northerly winds subsiding as the upper level trof axis pushes through the region.
Upper level ridge axis sliding overhead this afternoon should maintain mostly clear skies, outside of some high clouds. Latest water vapor imagery showing a strong upper level wave/trough entering North Dakota, with a full head of steam/momentum. This results in the moisture/cold front pushing east faster, reaching southeast Michigan late friday afternoon already.
Breezy sly winds and warm advection will boost temps well into the 50s today, as low pressure over the nrn Great Plains moves into far wrn WI by early this evening. The large upper trough digging ssewd across MN will then lead to an occluded low over central WI late tonight, with its cold front moving ewd across srn WI tonight.
Still seeing some gusts in the 30-40 mph range but those winds will continue to decrease in approach of strong cold front. Very strong pressure rises occurring in Montana this hour while leading edge of cold front across central Wyoming. Gradual clearing overnight and decreasing winds as high pressure builds into Colorado. Even though temperatures over the eastern plains will likely warm into the 40s, the windchill will feel closer to freezing.
This second stronger trough is accompanied by a surface cold front that will move through the area from north to south beginning this evening, and will bring cold Canadian air with it. Temperatures will drop into the 40s tonight behind the cold front. For today, as a surface pressure gradient tightens ahead of the approaching trough, west/southwest winds will pick up to 15 to 25 mph with higher gusts.
344 AM CDT Thu Oct 26 2017 Currently, the low pressure clipper system is centered between Jamestown and Fargo. Northwest winds behind the low across western and central ND were sustained at 25 to 30 mph with gusts of 40+ mph. Since daytime temperatures are in the lower 30s, thinking that we would not see much in the way of blowing snow - perhaps a reduction in visibility when snow will be falling, but not a widespread or long-lived time period of blowing snow. The clipper moves quickly southeast today, and tonight cold high pressure moves in. Lows tonight should range from the lower teens in the southwest to the mid 20s in the James Valley.
Cold front now extending from central Nebraska into northwest Kansas is forecast to exist southward to southeast KS and western Oklahoma by midday.
Even so, WYDOT obs have shown a few gusts around 55 MPH at BRX, and ARL is finally ramping up into the 40-50 MPH range with lee troughing taking place across eastern WY late this afternoon. The High Wind Warning will remain in effect until midnight. A strong cold front will sweep across the area from Thu AM through early afternoon. Snowfall amounts should be on the low side, around 1-2 inches for the most part.
SHORT TERM (Today through Friday): A 500mb trough will develop across the central United States today and deepen across the south- central U. low pressure across the Texas panhandle today will bring a strong cold front through northwest TX tonight and through south TX Friday. Low to mid level moisture will increase across the middle to upper TX coast tonight into Friday as the cold front approaches the lower TX coast Fri afternoon. With the cold front moving through deep South TX Fri afternoon. cooler and drier air will advect into the western half of the CWA late Fri morning into early Fri afternoon so temperatures will be below normal across the western and central portions of the CWA and near normal to slightly above normal across the lower TX coast.