Aikyam-Lab/Synoptic-Bench huggingface dataset:
One more relatively clear day aside from some high clouds is in store for today as an upper level ridge of high pressure over west Texas gradually slides east. Weak warm air advection at 850 mb and the ridge moving in from the west will allow high temperatures to be a few degrees warmer than yesterday in the upper 70s and lower 80s. High temperatures on Saturday should be in the 80s across the entire region as the upper level ridge moves overhead with increasing warm air advection.
Winds will be stronger tonight as next lee trough strengthens. Lee trough will continue to strengthen on Friday as cross mountain also strengthens. New guidance appears to be a little warmer. Recent trends and better performing guidance support going warmer and raised the maxes to near the warmest guidance. At this time it appears that the higher dewpoints will be collected with the strongest winds. The far western portion of those counties will have the lowest relative humidities. However in this same area is the lowest wind speeds. Upper ridge combined with downsloping surface winds will result in much above normal temperatures on Saturday.
The difference with this disturbance from today's, will be a closed mid-level low circulation which will bring cooler air down to the surface. As we move into Saturday evening model guidance are focusing on an area of enhanced precipitation with a passing center of low pressure. Rain will likely change to snow at all elevations in the path of the low. So the main question is, what will the path of this low be? The NAM and GFS have a similar path for the center of low, which they have forecast to pass through eastern Idaho County, near Missoula, and over Seeley Lake during the evening. These two models have the timing of the low passage three hours different with the GFS being faster.
345 AM EDT Fri Apr 7 2017 As low pressure moves north of New England a trough will move east across the area today.
227 AM CDT Fri Apr 7 2017 Deep northwest flow continues aloft across the eastern half or so of the United States this morning, as a large upper level low spins over upstate New York. At the surface, high pressure is settling southeast into the Ozarks. Clear skies and light winds will allow temperatures to fall into the mid 30s by daybreak, with some of the lower lying areas/valleys perhaps approaching the freezing mark. This persistent southerly breeze will keep temperatures on the warmer side tonight, with lows expected to range from the mid 40s east to low to mid 50s west.
Northeast Montana will bask in the warmest day yet of the season as a large and strong upper-level ridge of high pressure allows high temperatures pushing 80 degrees surge northward along the front range and high plains regions. This will be just ahead of an approaching cold front from the west associated with a series of upper-level low pressure troughs sliding in from the Pacific NW states. Just as soon as afternoon winds pick up from the south this afternoon, a sudden shift in the winds from the west will signal the onset of the cold front around 20 to 25 mph.
/issued 347 AM CDT Fri Apr 7 2017/ An upper trough is moving over the Pacific Northwest with another upper trough over the New England states. Upper ridging has developed over the central part of the country with west flow aloft. High temperatures today are expected to be a little warmer than yesterday with highs in the 80s across most of the area. The upper trough over the Pacific Northwest moves eastward on Saturday and a dryline develops across the far eastern Permian Basin and Lower Trans Pecos.
However, with very light winds overnight lows should drop into the lower to mid 30s in many areas and produce fairly widespread frosty conditions. By Saturday, sunshine continues and southwest flow begins to develop over the area with the area of high pressure beginning to shift southeast.
Gusty winds at KTRI and KTYS will occur in the wake of the exiting upper low pressure system.
think temperatures should be 2-3 degrees warmer in most spots to start the day tomorrow. expect gusty southerly winds to develop by mid morning as a trough of low pressure passes by to the north. High pressure aloft will begin to shift east over the upcoming weekend as a trough of low pressure moves onshore across the west coast.
Clear skies prevail across the region as a 1026 mb high pressure system builds in. High pressure will move directly over the region by evening.
333 AM EDT Fri Apr 7 2017 Rapid improvement in weather conditions is expected this morning as the back edge of the precipitation shield associated with strong low pressure shifts steadily east as said low tracks into New England.
Strong low pressure over the eastern great lakes will move off to the northeast. High pressure over the plains will move to Indiana by Friday evening and off to the east this weekend. Temperatures will become warmer over the weekend as an upper ridge of high pressure aloft builds across our area.
307 AM CDT Fri Apr 7 2017 After a clear and chilly morning with lows generally expected to reach the low 30s north of I-72 and mid 30s to the south, a high pressure ridge traversing central IL will bring clear skies today with perhaps a bit of high thin cirrus approaching from the WNW for the late afternoon and evening. Much weaker pressure gradients with the ridge will bring decreasing wind speeds through the day, starting at 5-10 mph out of the NW and becoming light and variable by evening. Once the ridge passes east overnight. gradients will begin to increase due to low pressure shifting into the northern Plains, with south winds up to 10 mph developing by Saturday morning. Still dry as high pressure remains the dominant influence on the weather.
540 AM CDT Fri Apr 7 2017 After a clear and chilly morning with lows generally expected to reach the low 30s north of I-72 and mid 30s to the south, a high pressure ridge traversing central IL will bring clear skies today with perhaps a bit of high thin cirrus approaching from the WNW for the late afternoon and evening. Much weaker pressure gradients with the ridge will bring decreasing wind speeds through the day, starting at 5-10 mph out of the NW and becoming light and variable by evening. Once the ridge passes east overnight. gradients will begin to increase due to low pressure shifting into the northern Plains, with south winds up to 10 mph developing by Saturday morning. Still dry as high pressure remains the dominant influence on the weather.
SHORT TERM (Now through Saturday): High pressure over East Texas will shift east, ahead of mid level ridging emerging over the High Plains. Pressure falls over the plains as ridging moves out will support a mild tightening of the local pressure gradient and thus moderate southeast winds through the short term.
Surface analysis showing high pressure ridging through the eastern plains and advancing eastward into the Mississippi valley behind a deep cyclone moving through the northeast CONUS. Similar pattern aloft yielding a dry north to northwest flow through the low and mid levels across the forecast area, and more westerly aloft. A gradual increase in low level moisture will be incoming for the weekend as high pressure slips off to the east and southerlies return. With moisture remaining confined to just the low levels through this time-frame, no rain expected.
Clear skies and light winds epected Tonight as ridge of high pressure settles over the Central Great Lakes region. Rapid improvement in weather conditions is expected this morning as the back edge of the precipitation shield associated with strong low pressure shifts steadily east as said low tracks into New England.
306 AM EDT Fri Apr 7 2017 A strong low pressure system over the Northeast U.
327 AM MST Fri Apr 7 2017 A Pacific low pressure system and associated front will swing into the western states this weekend resulting in strengthening winds on Friday and especially Saturday. Precipitation chances will be focused across the northern half of Arizona, and will be minimal across the lower deserts.
330 AM EDT Fri Apr 7 2017 A strong low pressure system over the Northeast U.
316 AM EDT Fri Apr 7 2017 Gusty west winds will continue today as strong low pressure lingers over the northeastern United States. Temperatures will average below normal through Saturday as high pressure builds in from the northwest.
Clouds will continue to decrease from the west into this evening, and the scattered showers will end across far south central Missouri in the wake of the exiting cold front. A noticeably cooler and drier airmass will overspread the area tonight and Sunday as Canadian high pressure builds southward.
another round of -TSRA is possible late tonight and again on Sunday morning as a stronger cold front sweeps in from the west.
A building upper level western ridge will expand eastward towards the western plains on Sunday.
1256 PM CDT SAT AUG 20 2016 Canadian high pressure located over Wyoming builds through Nebraska today and settles over Kansas tonight. The models show the clouds moving east through ND but could move overhead tonight as high pressure moves into KS.
Look for highs in the low/mid 70s Sunday. A ridge of high pressure builds in for the start of the new work week, and warmer temps look to return with it.
229 PM MDT SAT AUG 20 2016 Upper level ridge centered over California will shift east into Nevada Sunday. Enough moisture and instability will be over the higher terrain south of Interstate 70 for isolated storms through early evening. High pressure remain over the region tonight. Moisture and instability will be limited again with most of the showers and storms expected to be over the higher terrain south of Interstate 70.
A strong cold front will move through the forecast area overnight and a secondary trough will follow Sunday evening. High pressure will then be positioned across the region for much of the week.
The long-wave pattern across CONUS consists of a broad, flat upper ridge over the West and trough over the East. The ridge pattern will shift east which will cause the flow aloft to back around more to the west. With the ridge axis moving over eastern Montana, hot, modified desert air under the ridge will push towards the local area.
318 PM CDT SAT AUG 20 2016 Early afternoon water vapor imagery indicated seasonably deep upper-level trough lifting into the Great Lakes. Good mixing with the dry air though should allow for a bit warmer day with highs climbing back near or just above 80 most areas.
As the ridge begins to flatten out on Sunday, high pressure will drift a little further southeast. However, even with the center of the high drifting further southeast, dry weather will continue on Sunday as the outside periphery of continues to affect the central Plains. Will keep temperatures on the cooler side through Sunday.
High pressure ridging currently centered along the Pacific Coast will move into and across the Northern Rockies area through Sunday night. Other than some passing high clouds streaming into Montana along the eastern boundary of the ridge this aftn/eve, most locations in our region will see mostly clear skies over the next 36-48 hours. As the ridge axis approaches, winds aloft will turn to the west-southwest, bringing in a much warmer airmass.
Meanwhile a few scattered showers and thunderstorms developed behind the surface cold front as the cool air aloft together with mid-August sun promoted instability and shallow convection.
This activity is associated with large scale Central US trough. At the sfc cold front is expected to move through the area tomorrow morning.
A low pressure system now pushing into the western Great Lakes has spread a broad stratocu cloud shield back across Minnesota and into the the eastern Dakotas. expect clearing skies and light north winds as a cooler and drier airmass advects into the Red River Basin.
A cold front will sweep across Central Indiana late this afternoon and evening.
617 PM EDT SAT AUG 20 2016 High pressure will move east into the Maritimes tonight into Sunday.
1220 PM CDT SAT AUG 20 2016 A cold front was draped across southeast Kansas and extended northeastward up into the Great Lakes Region and southeast into Oklahoma this morning. Also, as a strong area of high pressure continued to drop southward across the Northern Rockies, the pressure gradient has increased across Western and portions of Central Kansas resulting in gusty northerly winds. We will begin to dry out this weekend and a cooler, dry post frontal air mass traverses the region bringing below normal temperatures and a break from the heat. Accompanying these cooler temperatures will be breezy northerly winds as the pressure gradient holds strong through the early to mid-afternoon.
Nothing more than cirrus across the mid Valley and struggling VFR cumulus streets across the Lower Valley, so elected to roll scattered for now.
Most precip is expected to stay over the higher terrain and south of highway 50. one or two storms will likely develop over the higher elevations of the Pikes Peak region. and 30s and 40s in the higher terrain. with U80s returning to the lower ark rvr valley and L80s over the El Paso county. it should be dry across the lower elevations tomorrow during the daylight hours.
302 PM CDT SAT AUG 20 2016 Cold air advection in the wake of last night's cold front has kept temperatures quite cool today with afternoon temperatures in the lower 70s and even upper 60s in spots. Clearing skies and light winds will allow temperatures to fall to the lowest readings we've seen in a couple of months with lows tonight in the lower and middle 50s. Large-scale ridging building into the central U.
1147 AM MDT SAT AUG 20 2016 Overnight water vapor imagery loop showed upper trough progressing east across the central Dakotas and Nebraska with subsident northwest flow across Wyoming and western Nebraska. Dry northwest flow aloft on backside of upper trough to the east will promote ample sunshine and moderating temperatures. Highs Sunday will rise into the 80s, with 60s and 70s for the high country. Upper ridge will continue to progress east across the Great Plains, with a potent upper low moving into southern British Columbia and Alberta.
309 PM CDT SAT AUG 20 2016 Cold front looks to have reached I-57 this afternoon although not well defined as it crosses the area. Could be an isolated lightning strike to the west as the most vigorous of the scattered showers west of the front have pushed a bit above the freezing level. The models remain in good agreement that the upper trough axis will make steady progress east of Illinois Sunday night. However, light winds and clear skies Sunday night should allow for favorable radiational cooling conditions, and lows dropping to the low to mid 50s, which will be our coldest low temps in several months. The NAM and GEM continue to advertise even colder lows, but continued to lean toward the warmer ECMWF by using a GEFS mean compromise.
Surface ridging continues to pull off to the east on Sunday night.
Models this cycle indicate the best rain chances will shift, with this weak cold front, to our southeastern counties. The best rain chances remain over our southeastern counties through Sunday night; then, those better chances shift to our northwestern counties, as a broad upper trough produces flow from the southwest over our area.
Tempeatures will be slightly warmer for Sunday, as there the area will be a little be drier letting tempeatures get up to near 90 degrees for most places.
124 PM EDT SAT AUG 20 2016 A cold front will move through the region during the afternoon and evening hours with showers and thunderstorms along and ahead of it by afternoon and progressing east into this evening. Cooler and much less humid air will arrive starting tonight and linger into the start of the new work week. Highs will reach the upper 70s to lower 80s with lows in the lower 60s. Challenging forecast in store with regards to convective chances into this evening ahead of a strong cold front and seasonably strong upper level trough. Second round will be pre- frontal trough currently firing convection from far eastern Iowa to western Illinois. sufficient forcing will exist on the cold front with little in the way of scouring of moisture. Cooler and less humid air will begin to move in.
536 PM EDT Sat Aug 20 2016 Showers and possible thunderstorms are expected with the approach and passage of a cold front through early Sunday, before building high pressure brings dry and less humid weather through mid week. The 500 mb trough axis will push through Sunday night.
Later this evening (between 00-06z) a 40 kt LLJ jet will rotate over the region ahead a fast advancing upper- trough. Behind this initial line will be a fairly strong cold front for this time of year. bringing cooler and drier air into the area. Any lingering showers along the higher elevations Sunday night will quickly weaken and move east before sunrise.
Mid and upper level flow from the east continues to prevail across central California this afternoon as an upper low remains off the California coastline.
207 PM EDT SAT AUG 20 2016 A pressure ridge will extend from the Atlantic westward into the Gulf of Mexico through Sunday. North of the ridge, a pressure trough and associated moisture will be in the forecast area. A cold front will move into the area Sunday night. Temperatures will remain above normal ahead of the cold front through Sunday.
115 PM MDT SAT AUG 20 2016 Upper height rises on the order of 5 dam are forecast for the next 24 hours as a ridge builds over the central Rockies and adjacent plains. high pressure centered over the central High Plains today will move east by tomorrow.
221 PM MDT SAT AUG 20 2016 After a relatively cool-ish Saturday we will see a gradual warming trend over the next couple of days as the upper trough moves out to the east and we see high pressure aloft build westward across the central Rockies.
A weak cold front, with associated showers and thunderstorms, will continue to slip slowly south this afternoon. A cold front near the I-20 corridor at sunrise will drift south and become more diffuse through the day. Meanwhile to the north, more storms are forming along and north of a cold front approaching the northern Big Country. (Sunday through Saturday) The wet and cool pattern continues into Sunday as the remnant cold front lingers across the area.
A typical August weather pattern remains in place through early Sunday with an upper ridge in place and a weak sfc pressure pattern. Lows tonight will be in the low to 70s inland to upper 70s along the coast.
By early evening, clouds will have moved east of the area and the center of high pressure should be neat central Kansas allowing for light winds overnight and through the morning. Another pleasant day is in store for tomorrow with dry conditions and highs only slightly warmer than today, in the lower 80s. Return flow Sunday night will bump lows up into the lower 60s in north central Kansas and upper 50s elsewhere.
Showers were moving across the region early this morning in advance of a cold front that was moving to the south across eastern Kansas. The cold front will make its way through the region this morning, pushing through the area by mid day. Cloud cover will quickly diminish in the wake of the front with cooler and drier air moving into the area for this afternoon and through tonight.
238 PM CDT SAT AUG 20 2016 Cooler and drier air will continue to filter south tonight into Sunday, making for a clear, cool night and pleasant day tomorrow.
252 PM CDT SAT AUG 20 2016 250 PM CDT Scattered showers with brief heavy downpours will continue east this afternoon and evening ahead of a cold front. Following the cold frontal passage expect a mostly cloudy and breezy afternoon and early evening with isolated showers tapering west to east. KMD 250 PM CDT Sunday will be cooler with a slight chance of light rain showers. However, the vorticity associated with the back side of the upper level trough could cause a few showers to form.
The primary cold front continues to slowly migrate through the area late this morning, roughly from Freeport to Macomb at 11 am. Upper level trough digging into the plains this morning with a lead wave now lifting out over the upper Mississippi valley and the main energy with the trough over south central South Dakota. Cold front and associated storms are tracking most closely to the timing of recent runs of the ECMWF, thus will use this as a general basis for this morning's forecast.
Clearing skies, light winds, and much cooler air filtering southward into western Kansas will allow temperatures to drop well below normal tonight.
416 PM EDT SAT AUG 20 2016 High pressure will move east into the Maritimes tonight into Sunday.
336 PM EDT SAT AUG 20 2016 A cold front will move through the region this evening. Cooler and less humid air will arrive later tonight and linger into the start of the new work week. Lows tonight will be in the 60s while highs on Sunday will only be in the lower to middle 70s. Broken line of convection along pre-frontal trough will continue to work east through the forecast area into early evening. Models have remained consistent with secondary and tertiary short waves driving through mean trough Sunday with wrap around moisture clipping our far north. cooler and less humid.
A cold front extends from eastern Wisconsin through southeast Missouri and into central Texas. As the cold front moves into the forecast area tonight, more showers and thunderstorms are expected to develop over the region. The cold front will move through north Mississippi on Sunday with thunderstorms ending behind the front. Temperatures will be similar to today with highs in the low to mid 80s. The cold front will slow down and stall out across southern Mississippi Sunday night which will mean that there could be some isolated showers over southern portions of the forecast area.
Cold front near I-44 will continue to push south through the evening. /Issued 1130 AM CDT SAT AUG 20 2016/ Widespread rain with a few embedded thunderstorms continues across far southeast OK well ahead of the cold front, which was located near to just south of I44 at 11 AM. /Issued 320 AM CDT SAT AUG 20 2016/ Scattered showers/thunderstorms will continue this morning ahead of cold front which will move into northeast Oklahoma later this morning.
308 PM MDT SAT AUG 20 2016 Upper height rises on the order of 5 dam are forecast for the next 24 hours as a ridge builds over the central Rockies and adjacent plains. high pressure centered over the central High Plains today will move east by tomorrow.
349 PM MDT SAT AUG 20 2016 Trough passage yesterday has caused winds to shift to the west through northwest today. Mostly though, a few cumulus clouds will remain over the higher terrain with temperatures right around normal. For Sunday, a very broad area of high pressure will remain over the southern portions of the U. while low pressure remains off the Pacific Coast.
Current sfc pressure analysis shows the center of the low over northeastern WI this afternoon. A cold front will move through southern WI, exiting by this evening. Cold air advection behind the cold front will bring some of the coolest air of the summer into southern WI, as shown by the 925 mb temperatures as the GFS, NAM and ECMWF are progging 925 mb temps near 11-12 C. A bit of a rebound in these 925 mb temps up to 15 C will support highs Sunday into the lower 70s.
/Issued 421 AM CDT SAT AUG 20 2016/ Showers and thunderstorms have continued moving across the Panhandles overnight in connection with the front and the upper level trough. As the trough moves east and the front pushes further south into Texas, the precip will move away also. A push of dry air in the mid levels will keep the area dry for Sunday as ridging begins to build in.
227 PM EDT SAT AUG 20 2016 High pressure will remain over the area today then move east into the Maritimes tonight into Sunday.
500 PM MDT SAT AUG 20 2016 After a relatively cool-ish Saturday we will see a gradual warming trend over the next couple of days as the upper trough moves out to the east and we see high pressure aloft build westward across the central Rockies.