Aikyam-Lab/Synoptic-Bench huggingface dataset:
To the north, observations have indicated the cooler drier airmass moving in behind the front with a northerly wind. High pressure will edge into the area today from the northwest keeping a dry forecast in place. Clear skies in place tonight with high pressure overhead and light surface winds will lead to fog development tonight. Otherwise, high pressure, morning fog, and pleasant conditions will be the main story for the next 36 hours. At the start of the period an upper level low will be over PA.
A cold front currently residing north of the state will be pushing southward through the area today.
313 AM CDT Tue Jun 6 2017 309 AM CDT High pressure will continue to build over the upper Mississippi Valley today leading to dry and sunny conditions. Didn't go as high as guidance suggests, but trended warmer. JEE 309 AM CDT High pressure will dominate the pattern through mid week with no measurable precip expected.
Possible showers and thunderstorms could accompany the lowered cigs, but confidence is not high enough to add to the forecast.
We are expected to remain in a north/northwest flow pattern for the next few days with an upper level ridge anchored to our west. By the weekend, the upper level ridge will start translating east as a stronger upper level trough moves into the Pacific NW coast. Even though the upper level trough has now moved east of the region, there is still a lingering chance for some showers and perhaps an isolated thunderstorm or two across our southern and southeastern counties this afternoon. A disturbance currently located in western Colorado is expected to round the top of the upper level ridge and move south starting tonight.
Currently, a cold front extended from a low over the central border of Saskatchewan/Manitoba southward to Minot/Bottineau to Bismarck/Steele to near Fort Yates. At upper levels, a low was centered over northern Saskatchewan with a trough extending south into central Montana, with some leading vort energy impulses ahead of the main trough along and behind the surface front. The upper level trough is forecast to move southeast today and tonight, reaching eastern North Dakota by daybreak Wednesday. The surface cold front is forecast to move eastward slowly today, reaching the James Valley around noon and the Red River Valley by evening. Cooler today with highs from the lower 70s northwest to lower 80s in the James Valley.
338 AM EDT Tue Jun 6 2017 Under mostly cloudy skies with moderating southerly breezes, temperatures along the Keys island chain are in the lower 80s.
304 AM PDT Tue Jun 6 2017 Above average temperatures will continue into Wednesday before a strong cold front moves through.
337 AM MDT Tue Jun 6 2017 Warm and dry high pressure will be present over the Northern Rockies through Wednesday.
During the course of the afternoon, a push of lower moisture will arrive from the east, pivoting around the upper low over the ern Great Lakes. Upper level trough axis to slide just south of lower Michigan tonight, with negative upper level PV Advection and subsidence tomorrow leading to a mostly sunny day.
High pressure will dominate the weather pattern tonight.
However, slightly cooler and less humid than the previous couple of days, but still confident to go at or slightly above MOS guidance for highs today.
High pressure will keep things warm and dry with temperatures 5 to 10 degrees above normal through the week.
1144 PM MDT Mon Jun 5 2017 High pressure will continue through the period with max temps remaining 10-15 degrees above normal.
437 AM CDT Tue Jun 6 2017 (Today-tonight) Northwest flow aloft will prevail across the area today as an upper ridge strengthens to our west.
209 AM MDT Tue Jun 6 2017 Cooler conditions today behind a front that is presently sinking south across the plains with a few showers noted behind it.
600 AM CDT Tue Jun 6 2017 Dry/pleasant conditions will continue today and Wednesday as high pressure continues to build into the Upper Mississippi River Valley. Overnight lows tonight will bottom out in the middle 40s across the sand country of central Wisconsin to the lower 50s elsewhere.
333 AM CDT Tue Jun 6 2017 An upper level low pressure trough will continue to move slowly eastward east of Texas. Both show a ridge building over the Rockies during the mid week period as the trough over the Gulf coast moves northeastward and merges with the upper low over New England and NY. The ECMWF builds a weak ridge across the Gulf of Mexico from the east and the Pacific across Mexico to the west, with a weakness in the ridge over Texas.
400 AM CDT Tue Jun 6 2017 The synoptic pattern early this morning features a strong upper- level trough diving into the eastern Great Lakes region, which will keep northerly flow over the Midwest through the period. The surface cold front has pushed into far southern MO, allowing for much drier air to work into the region in its wake. Temperatures will dip into the low to mid 50s across much of the area, about 5-10 degrees below normal for this time of year.
339 AM EDT Tue Jun 6 2017 A weak trough of low pressure will locate along the Mid Atlantic coast today as a cold front pushes south into the Carolinas.
Pattern synopsis and forecast: Upper level troughing was over the eastern Great Lakes, which extended through New England. Most of the precipitation around this system was diurnal in nature along and ahead of the cold front as showers and thunderstorms. The upper level troughing will start to sink southward through the day, but there will be some weaker final vorticity maxima that drops into the region today, while the lapse rate gradient aloft remains in place. Highs in the lower half of the 70s with cooler mid to upper 60s in NE flow coming off Lake Huron and Whitefish Bay. Lows tonight in the low to mid 40s most areas.
An upper-level low and associated trough, centered just offshore of South Central Louisiana via current satellite imagery, will continue to shift east northeast across the Deep South through the course of the period. Otherwise, under cloudy skies, highs this afternoon will warm into the lower 80s. In the wake of the upper low pressure system and a cold front that'll eventually drag south through the forecast area, high pressure to our north will begin building south into the CWA. This will begin advecting a cooler drier airmass into the forecast area through the overnight hours. Other than some lingering clouds across the Pine Belt region as day breaks early Wednesday morning, lows will range in the low to upper 60s under mostly clear skies.
345 AM EDT Tue Jun 6 2017 A cold front will slowly move south into the coastal region of the Carolinas this morning. A stronger cold front will move through the region this afternoon and evening and then stall near the Southeast coast for much of the work week. Lows Tuesday morning are expected to range from the lower 60s north to the upper 60s/near 70 south/southeast.
Dry conditions continue through Tuesday as high pressure continues to push eastwards while broad trough in the Gulf of Alaska inches its way closer to the West Coast during this time.
Again, with the GOM cutoff right now, these systems are working with limited Pacific moisture and this will keep rainfall amounts on the lower end.
These temperatures will be short lived as GOES-16 satellite imagery shows a southward sinking cold front moving through the region this afternoon, with a notable decrease in dewpoint temps directly behind this feature. This will set the stage for less humid and more enjoyable conditions which should persist through the remainder of the work week as sfc ridging remains in place off to our northeast.
Quiet weather across SW KS through tonight, with broad ridging aloft suppressing convective potential. After some cumulus this afternoon, tonight will be clear with lows Tuesday morning ranging from the upper 50s west to the lower 60s east.
319 AM CDT Tue Jun 6 2017 Dry/pleasant conditions will continue today and Wednesday as high pressure continues to build into the Upper Mississippi River Valley. Overnight lows tonight will bottom out in the middle 40s across the sand country of central Wisconsin to the lower 50s elsewhere.
357 AM CDT Tue Jun 6 2017 A perfect weather day is expected today as high pressure centered up by Lake Superior remains in control.
This activity will stay attached to the terrain, and tonight will be dry across the lower elevations. Upper level ridge will bring warmer conditions Wednesday with highs back to the 80s. By Wednesday night, believe we will see some convection spread off the terrain as low level jet increases and elevated instability is released along a mid level warm front.
It is sorta of a blocking like pattern with an upper level ridge over the Southern Rockies and troughs on both the West and East Coast.
634 AM EDT Tue Jun 6 2017 The airmass across the region through Tuesday will be moist and unstable ahead of a slow moving cold front.
Afternoon water vapor imagery data shows upper low spinning to our north and northeast. Again, daytime heating may trigger some isolated convection as upper trough finally pushes eastward. Drier air finally builds into the region Tuesday night as trough axis moves into the Deep South.
A cluster of storms in western Nebraska may try to slide south with the cold front. A weak cold front approached the region later Tuesday night, with a prefrontal trough acting as a focus for initiation in the evening. With clearing we may see instabilty increase would could support better thunderstorm chances in the afternoon/evening before subsidence and ridging spread east Wednesday night. Temps will be tricky with post frontal air mass (cooler) and cloud cover.
An upper level ridge over the western U. will continue to shift east through Tuesday in response to an approaching upper low over the Gulf of Alaska.
316 AM EDT Tue Jun 6 2017 High pressure will move slowly south across the Great Lakes the next couple of days providing generally dry conditions and cooler than normal temperatures.
401 AM CDT Tue Jun 6 2017 The synoptic pattern early this morning features a strong upper- level trough diving into the eastern Great Lakes region, which will keep northerly flow over the Midwest through the period. The surface cold front has pushed into far southern MO, allowing for much drier air to work into the region in its wake. Temperatures will dip into the low to mid 50s across much of the area, about 5-10 degrees below normal for this time of year.
Upper level trough axis to slide just south of lower Michigan tonight, with negative upper level PV Advection and subsidence tomorrow leading to a mostly sunny day.
Otherwise, in the short term, high pressure will continue to move south into the area. The forecast period starts with a closed low over West Virginia providing the region with northerly flow aloft.
Southwest flow aloft ahead of a large upper level trough will bring warmer and gradually more unstable air into the area through the short term.
428 AM EDT Tue Jun 6 2017 A cold front will move through the area this morning. Cool and showery weather under an upper level low through much of the week. Cold frontal boundary at 06Z appears to be near the Ohio River, and is progged to continue to sag south across the area this morning, with drier air gradually filtering into the region. Most of the day should be dry, although upper low/trough will sag south into the region as the day progresses, with clouds, and showers gradually taking hold, mainly across northern zones. Upper low over the area giving unsettled weather which is inherently difficult to time.
402 AM CDT Tue Jun 6 2017 Water vapor loop indicated an upper level trough from northern SASK into western MT. Upper trough forecast to move across the area Wed and Wed night. 700 theta-e ridge will track across the area today through Wed with some wrap around. Northwest flow aloft will be across the area for Thu and Thu night as a flattened upper level ridge moves across the area.
The HRRR and RAP show that additional scattered showers and thunderstorm development is possible, while others suggest it will be a later show as the cold front advances from the northwest. Have included some low pops this morning but still expecting more organized development along the cold front as it pushes into our area early afternoon.
1247 AM CDT Tue Jun 6 2017 Latest surface analysis indicates the main cold front has slipped into far southern Illinois this evening with a second boundary/wind shift making its way south across the forecast area. The main push of cooler and drier air is lagging behind this secondary boundary about 50 to 75 miles to the north where early evening temperatures were in the low to mid 60s. We expect the wind gusts to gradually diminish later this evening as high pressure builds south out of the upper Great Lakes. Plenty of sunshine expected on Tuesday with temperatures cooling back to the mid 70s north and east to the lower 80s over far southeast Illinois. Cooler and much drier air is advecting into central IL behind a cold front now moving into the I-70 corridor.
610 AM EDT Tue Jun 6 2017 High pressure will move slowly south across the Great Lakes the next couple of days providing generally dry conditions and cooler than normal temperatures.
Meanwhile, isolated showers in association with the upper trof continue across North Mississippi. Highs will be in the lower to mid 80s. Highs will range from the mid 70s to the lower 80s. An upper ridge will begin to build over the area by the latter part of the weekend.
Thunderstorm activity is more widespread today as moisture under the ridge has increased and low level easterly flow has kept dew points in the 40s and lower 50s funneling into the southeast mountains.
On the back side of the upper low over the lower Mississippi Valley expecting a few showers and thunderstorms to occur over parts of South Central Arkansas and North Louisiana and possibly Deep East Texas. /issued 929 PM CDT Mon Jun 5 2017/ Convection continues to diminish in intensity/coverage this evening, despite the upper low ovhd.
An upper low over the eastern Great Lakes will gradually slide south. We could see a few mid or high level clouds over southeast WI this afternoon and tonight as that upper trough drops through. The onshore component to those winds will keep temps cooler near Lake Michigan. Expecting highs to be a couple degrees warmer than yesterday. High High pressure will continue to dominate.
340 AM EDT Tue Jun 6 2017 Upper level low pressure area will spill over the northeastern U.
To the north, observations have indicated the cooler drier airmass moving in behind the front with a northerly wind. High pressure will edge into the area today from the northwest keeping a dry forecast in place. Clear skies in place tonight with high pressure overhead and light surface winds will lead to fog development tonight. Otherwise, high pressure, morning fog, and pleasant conditions will be the main story for the next 36 hours.
The only minor change we made to the late evening update was to eliminate the mention of freezing drizzle on the leading edge of precip as it moves into the southwest later tonight. We do lose ice on the back edge of precip and there was already a mention of freezing drizzle Sunday morning in the far southwest. There is a slight chance of freezing drizzle before the onset of snow, however, any ice accumulations are expected to be minimal.
116 AM EDT Sun Apr 8 2018 Low pressure over the Southeast will shift offshore tonight. Sky conditions adjusted to match this trend as we are already beginning to see some of the low cloud lift with the passage of the back edge of the precip. Low temperatures tonight will vary from the upper teens in the mountains to the lower 30s in the Piedmont. High pressure will build in with fair but chilly weather for Sunday.
Once again, the warmer April ground and more productive sun angle will limit impacts from any icing.
348 AM CDT Sun Apr 8 2018 Today and Tonight: Latest observational data showing the far northeastern areas have managed to drop to the freezing mark, while further west reading were just above. Thereafter, veering low level winds as high pressure center moves off to the east will begin to bring low level moisture and cloud cover back into the area from the southwest. Model soundings seem to indicate moisture depth with the weak ascent will be sufficiently deep for patchy drizzle in proximity to this low pressure feature which will exit to the east before sunrise Monday.
Low-amplitude upper trough is now over the northwest states. At 2 AM MDT a weak embedded short wave trough was passing through our CWA with a few light showers, as seen on radar. Snow accumulations through this evening should be 1-4 inches, but locally up to 8 inches in the higher central Idaho mountains including Banner Summit. Lows will range from the 20s in the mountains and most of eastern Oregon, to mid 30s in the lower agricultural valleys of southern Idaho. Highs Monday will recover to normal as an upper ridge comes in from the Pacific.
Precipitation type will depend on timing, as atmosphere cold enough through about 14-16Z to support snow, with mainly rain after that as highs warm into the lower to middle 40s for highs. Temperatures will drop down towards the freezing mark, with perhaps a few upper 20s over the eastern Ozarks.
Cloudy skies with much cooler temperatures this morning. normal is 57 but a long way from the records in the lower to mid 30s. A wonky cold front in Colorado will push east and southeast into SETX on Monday with a warm front moving back north into the coastal waters on Monday prior.
The progression will make it difficult for some of the higher totals to be realized, but the intensity of the snowfall rates is sufficient to maintain the forecast roughly as is with a general 2 to 5 total still expected when all is said and done. Following the departure of the current storm system, upper ridging over the western U.
has allowed temperatures to remain above freezing in most locales. with most of the CWA seeing temps above freezing. The area will still see a chance for light rw/sw and even a spot of freezing rain with no expected impacts.
Very cold westerly flow under an advancing short wave trough axis is causing a few flurries. However, the well below normal temps and thick cloud cover could make for a very light but slushy accum on the grassy areas of the ridges -- even during the day. Many little troughs upstream come out of the Pac NW and across the Northern Plains.
Tonight Through Monday Freezing temperatures continued into the early afternoon before starting to climb. High pressure will build into the state tonight and bring clearing skies, and winds will diminish. Freezing temperatures are expected over the entire area tonight into Sunday morning.
A fast WNW flow aloft along with deep sfc lee side troffing will allow temps to soar this aftn. therefore the High Wind Watch has been upgraded to a Warning for this aftn/early evening.
Plan is to keep the High Wind Warnings going as forecast through that time.
249 AM EDT Sun Apr 8 2018 Upper air pattern consists of a 500 mb trough over the lower Great Lakes this morning with a closed low off the Pacific NW coast. Broad upper level troughing with continuation of colder than normal temperatures looks to prevail much of the upcoming week. High pressure in wake of that system will bring dry weather Thu, then medium range models and ensembles continue to point to potential for large winter system affecting the Upper Great Lakes region Fri into Sat. Both blend of model qpf along with ensemble probabilities for exceeding over 1 inch of qpf point to potentially a significant system, though potential for warm layer aloft (shown by latest GFS and ECMWF) will ultimately determine extent of snow and/or sleet/freezing rain.
A significant temperature gradient will likely exist with 80s likely along the Rio Grande while locations along the immediate coast may not make it out of the low 70s.
The Tri-State area will see mostly rain and freezing rain, but some areas could see light snowfall. Our eastern Colorado counties are expected to see the heaviest freezing rain totals, with highest estimated values up to 0. For Sunday, high pressure is expected to build back into the area allowing us to see a warming trend. With the ridging overhead, lows will drop near 30 overnight Monday.
137 AM EDT Sun Apr 8 2018 High pressure and a seasonably cool airmass will remain in place across the region through Sunday.
The upper low that pushed a cold front through the region yesterday is currently over Vancouver Island and has weakened. This low will continue to weaken and fill today as it shifts east across northern Washington state. Much of the Columbia Basin and it's surrounding valleys, plus the Highway 97 corridor in central Oregon, will see winds of 20 to 30 mph sustained. The highest coverages of showers will be along the Cascade east slopes and over the interior mountains. An upper level ridge will build over the region tonight into Monday. As such will see showers decrease through tonight with dry and warmer conditions Monday and Monday night.
A low pressure system will bring some rain and snow to central Indiana tonight into Monday night. /Today/ High pressure was providing clear skies and cold temperatures across central Indiana early this morning. The lower atmosphere was dry with dewpoints in the teens to around 20 degrees. Clouds will increase today ahead of an approaching low pressure system.
424 AM EDT Sun Apr 8 2018 Drying will occur this morning with low pressure moving farther northeast and high pressure moving into the region in its wake. Moisture will increase tonight in an easterly flow and ahead of low pressure south of the area.
358 AM CDT Sun Apr 8 2018 Flat upper level ridge was over the area with an upper trough over MT and southern ALTA.
317 AM EDT Sun Apr 8 2018 Low pressure passes well east of New England today. High pressure will follow on Monday.
It will be followed by a second UL trough which will pass around mid-day Monday.
A cold front is expected to move into the Panhandles within the first couple hours of this TAF cycle. However, have decided to go with the latest high resolution model trends and will keep the warmer temperatures. The warmer temperatures across the west and southwest will keep the Fire Weather threat up as well (See Fire Weather Discussion). Highs on Monday will be in the low 60s to low 70s.
The cold front over the panhandle of Florida will gradually push to the south today.
338 AM CDT Sun Apr 8 2018 High pressure over the Mid South today will slide east with weak return flow setting up.
A lingering stationary boundary over Eastern Idaho will allow for additional snow showers over the Highlands through this evening. Overnight, high pressure will build in from the west and allow for improving weather conditions.
/issued 244 PM CDT Sat Apr 7 2018/ (Tonight and Sunday) Strong cold air advection continues behind the cold front as a shallow arctic airmass has invaded much of Texas. As of 1 PM, Abilene and Sweetwater both had a temperatures only around freezing, with 40s further south across the southern 2/3 of the area. For Sunday, expect much warmer temperatures due to low level west- southwest flow and 850 MB temperatures of 19 to 23 DEG C.
700 AM EDT Sun Apr 8 2018 Aviation An area of high pressure located in Iowa this morning will track through the Great Lakes Region today. A weak area of low pressure will move in from the west late tonight and Monday. The weather today will be dominated by a weak area of high pressure which tracks eastward through the state.
An area of high pressure will shift through the Northland overnight, resulting in clear skies, very light wind speeds, and ideal conditions for radiational cooling. The snow and clouds will be associated with an area of low pressure digging from the Northern High Plains to Central Plains tonight through Sunday. Highs will be in the lower 30s.