Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 951 AM EDT Mon Mar 20 2017/ A northwest flow is in place aloft this morning as Florida resides in between a low off the New England coast and weak ridging over the south. Weak high pressure resides over the state at the surface and will remain over the region through the day. Ridging aloft will build westward over the Gulf of Mexico through the day as the low continues to move off the U. The sea breeze will turn winds onshore in the afternoon and will keep coastal areas a few degrees cooler. High pressure will remain over the waters for the next few days, with benign boating conditions expected.
321 PM CDT Mon Mar 20 2017 (Tonight and Tuesday) Temperatures this afternoon are mainly in the 80s, with some locations approaching the lower 90s by late this afternoon.
Deep low pressure trough tracking over Canada will send a reinforcing shot of cold air across the Great Lakes region Tuesday with developing northwest flow.
Surface dewpoint readings were from the lower 50s across southwest Mississippi to the lower 60s along the Louisiana coast. Upper air analysis showed a broad ridge over the Plains.
High pressure will build down across the area tonight, and then shift offshore into tomorrow with ridge axis near Lake Okeechobee. Conditions will remain dry Tuesday and will be a little warmer than normal with highs reaching the upper 70s to low 80s.
Moving on, we will see a day or two of dry and cooler weather on Wed and Thu.
107 PM EDT Mon Mar 20 2017 Weak ascent working along an elevated warm front will maintain a window for showers /mainly Detroit corridor/ late today, while perpetuating a combination of VFR diurnal cu and a lower coverage of MVFR stratus. This moisture will exit to the east early tonight, with developing light northerly flow encouraging a clearing sky across the lowest 5000 ft overnight. For this afternoon, cold front to the west will be moving east with no real solid upper level forcing for the northern two thirds of the cwa. For the southern counties, a warm front will remain nearly stationary along or just south of the border. North of the I96 corridor will have just a chance for showers with cold frontal passage as again moisture will not be as deep and forcing confined mainly to frontal convergence.
251 PM CDT Mon Mar 20 2017 You know you've rounded the corner of seasonal change when a cold front brings north winds and a nice day behind it. Some of the extratropical cyclones that develop across the CONUS will have the potential to be strong.
309 PM CDT Mon Mar 20 2017 Cooler temperatures on Tuesday highlight the short term forecast. A cold front across northwest and north central North Dakota as of 20 UTC will continue to propagate southeast this afternoon and evening with cool high pressure building behind the front across the Northern Plains and Upper Mississippi Valley. There is a chance for light snow across extreme southwest North Dakota tonight into Tuesday morning in association with the baroclinic zone on the western periphery of the high. A much cooler Tuesday is forecast compared to the last couple days with highs in the 20s north central and the 30s elsewhere with cool high pressure across the region.
Cold front has shifted south and east of the area early this morning with widespread thunderstorm activity across northern Illinois.
The short term gets underway with an upper level ridge over the region through Tuesday afternoon.
Cooler air begins to filter in behind the front on Tuesday.
Cooler temperatures on Tuesday highlight the short term forecast. A cold front across northwest and north central North Dakota as of 20 UTC will continue to propagate southeast this afternoon and evening with cool high pressure building behind the front across the Northern Plains and Upper Mississippi Valley. There is a chance for light snow across extreme southwest North Dakota tonight into Tuesday morning in association with the baroclinic zone on the western periphery of the high. A much cooler Tuesday is forecast compared to the last couple days with highs in the 20s north central and the 30s elsewhere with cool high pressure across the region.
Temperatures will be cooler tomorrow though, with highs in the mid to upper 40s for the most part.
Issued by National Weather Service Jackson KY 406 PM EDT Mon Mar 20 2017 A thunderstorm complex that has developed over northern IL has shifted southeast along a warm front anchored along a line from central IL into southern IN and into northern KY. Low pressure along the central MS Valley will press east but looks to stay south of the area as it passes along northern Kentucky. This will keep much of the precip associated with the low to the south and any rainfall chance will be along the OH River and into northern KY Tuesday evening.
631 PM EDT Mon Mar 20 2017 A weak cold front will move southeast through the region this evening bringing widespread precipitation to the area. It will be followed by an arctic cold front late Tuesday into Tuesday night.
144 PM EDT Mon Mar 20 2017 There will be a chance of rain late this afternoon and tonight as an area of low pressure crosses the region. Recent model runs have slowed down the onset of precipitation in association of the area of low pressure forecast to cross the region late today. Much of the region will be dry Tuesday with the exception of the ridges in the morning as low level moisture may be slow to exit the area. Have only slight chance to low chance precip to the far south with this feature as the favorable location within the base of the trough passes south of the CWA.
118 PM EDT Mon Mar 20 2017 High pressure will build across the area through Tuesday.
Recent model runs have slowed down the onset of precipitation in association of the area of low pressure forecast to cross the region late today. Much of the region will be dry Tuesday with the exception of the ridges in the morning as low level moisture may be slow to exit the area. Have only slight chance to low chance precip to the far south with this feature as the favorable location within the base of the trough passes south of the CWA.
After the elevated storm clusters exit this morning, Canadian high pressure to dump down the upper midwest and battle central plains to OH RVR Valley llvl baroclinicity during the midweek. Then large cyclone still indicated by the latest run medium range models to lift out acrs the mid CONUS in almost a REX type block pattern at week's end.
Ahead of it, a 850 mb theta-e gradient/warm front will cross the area this morning, and associated isentropic lift will bring broken clouds for most of the morning and early afternoon. The best lift and moisture with the trough stays north of our area closer to the upper jet, but we will see increasing moisture and instability through the day as the theta-e axis shifts south into KY/SW VA.
133 PM EDT Mon Mar 20 2017 There will be a chance of rain late this afternoon and tonight as an area of low pressure crosses the region. A weak upper thermal trough diagnosed across the eastern Great Lakes into the Ohio Valley earlier this morning had helped cause some very light precip over the Cleveland area but has since diminished as it approached our CWA due to much observed dry air in the low to mid levels. Recent model runs have slowed down the onset of precipitation in association of the area of low pressure forecast to cross the region late today.
Clouds will becoming more abundant this afternoon and evening, which along with minor cold air advection filtering into the region, will help cap high temperatures much cooler than yesterday's readings. Temperatures will be cooling to near freezing as the precipitation begins, with some wet-bulbing from rain to snow possible late tonight in south central as the precipitation rate increases.
116 PM CDT Mon Mar 20 2017 Quiet and cooler weather today with northeasterly surface flow with zonal flow aloft. Highs in the lower 60s to lower 70s, still well above normal on this first day of Spring, but definitely not as warm/hot as yesterday.
Today concern will be temperatures once again and some light snow possible along a cold front passage this evening across the northeastern quadrant of the forecast area. Cold front with winds turning the north northwest will push across the area this evening in the 00Z- 06Z time frame.
Will be fighting the dry air in the low levels, but dynamics should win out where 700 mb frontogenesis is the strongest. Will get some assistance with the right entrance region of a jet streak across the area through the event, but will need to the low level dynamics to overcome the dry air in the low levels.
925 temps will be cooler with readings near 0c so expecting highs mostly in the 40s.
/issued Issued by National Weather Service Tulsa OK/ Cold front has pushed into northwest OK and will move slowly southward to near a KBVO - KSWO - KCSM line by late afternoon. The strongest winds by afternoon are expected to focus from southwest to south central OK and slightly offset from the lowest humidity zone which will be located nearer the frontal boundary.
300 PM CDT Mon Mar 20 2017 19z/2pm surface analysis shows cold front just east of the I-55 corridor. Despite Canadian high pressure building into the Midwest on Tuesday. Frontogenetic forcing will be strongest across the central and northern KILX CWA, so have therefore focused the highest PoPs across this area during the afternoon. High temperatures will be held down to the clouds and scattered showers, with readings mainly in the lower to middle 50s.
The low in the Eastern Pacific moves closer to the coast Tuesday.
This will bring cooler (though still far warmer than the seasonal average) weather to all but southeastern Oklahoma tomorrow.
However, the light precipitation intensity and above freezing ground should limit the snow/ice road impacts to the higher valleys and terrain.
Upper level zonal flow currently prevails across the area as the United States is flanked by synoptic troughs to the east and west. Tuesday will be noticeably cooler with highs in the mid 40s to lower 50s as 850 mb temps at 0C to 2C is expected, along with significant sky cover. A modest low-level jet develops Tuesday night with the potential for some late night warm air advection type showers near the theta-e ridge axis. Warm nose could develop and give some sleet/freezing rain, but confidence is not too high and will keep rain/snow for now.
An upper trough over the eastern Pacific will continue to swing east towards the west coast through tonight. Have increased coverage over the lower basin to scattered for this morning. The confidence in the general pattern is becoming higher, but the timing of individual waves moving through the troughs remains uncertain.
Despite the cool start, a big warmup is expected today as a westerly LLJ increases to 35 kts per guidance, ushering a much warmer and more humid airmass into the forecast area with 850 temps rising into the mid teens. All of these factors suggest potential for some strong to possibly severe storms Tuesday afternoon into Tuesday evening, with large hail the most likely threat due to the steep lapse rates aloft and tendency for the shallow cold front to ooze southward and keep most convection elevated above the frontal surface.
A cold front will move through Tuesday night with a drop in temps for the middle of the week.
A cold front is slowly sagging south across the cwa this afternoon shifting winds north/northeasterly and as these winds increase during the mid/late afternoon. cms 304 PM CDT Northwest flow still anticipated to be in place and although high pressure will build southeast across the region during this time, still am monitoring for the potential of some light rain Tuesday afternoon.
While radar returns are fairly good, the lower levels of the atmosphere are fairly dry per the 0Z KABR sounding. A secondary cold front currently over southern Canada will slide southward later this afternoon. This front east/west running cold front should be located over this CWA between 0-6Z Tuesday.
A quasi-stationary surface front extended from the lower Missouri Valley across southern Nebraska into north central Wyoming. Short range numerical models are in good agreement with a cooler and unsettled start to the first day of spring. A short wave and Pacific cold front will push through the CWA today, bringing chances for showers and even a few afternoon thunderstorms to areas mainly west of Interstate 25. The showers will end from southwest to northeast Tuesday morning with the departure of the short wave and arrival of a weak upper ridge.
340 PM CDT Mon Mar 20 2017 (Tonight and Tuesday) Temperatures this afternoon are mainly in the 80s, with some locations approaching the lower 90s by late this afternoon.
On Tuesday, another warm day is expected as a cold front begins to drop south towards the forecast area late in the day. Resulting potential for southeast propagating small storm clusters introduces a slight chance some of this activity could impact locations along and north of the Highway 82 corridor later Tuesday night, although confidence is still high any risk of severe weather should remain confined entirely north of the forecast area.
214 PM MDT Mon Mar 20 2017 20z surface analysis had frontal boundary from central WY into southwest NE with ridge across the Dakotas into the Midwest. Thermal ridge will nose over the low level cold air.
Heading into Tuesday morning, a cold front will push inland as the low continues to shift eastward. We also noted that some potential instability will develop ahead and behind the cold front.
Canadian high pressure builds south tonight and will usher in cooler air over the next 24 hours as H850 temps fall to 2-3C by Tuesday afternoon.
/19/ Another warm day is on tap for the forecast area today, as highs warm into the low and middle 80s areawide.
249 PM CDT Mon Mar 20 2017 A strong high pressure system to the North will be pushing off to the East which is creating a decent cap over the region. This high pressure will also allow for some CAA that will bring temperatures down as well.
Its going to be cooler the next few days as colder low level air flows southward behind that departing front from today. Temps should return to (or be a bit cooler than) the seasonable normals. 500 mb trough slated to move east from the southern CA coast into the southern plains by 00z Sat, then lifting northeast across the oh river valley for the weekend. A fetch of relatively warm/moist air will lead this system into the local area, with the low level thermodynamics and west-east running frontogenetic forcing likely resulting in bands of rain starting thu afternoon.
/issued 421 AM CDT Mon Mar 20 2017/ (Today and Tonight) Look for another extra warm afternoon today, as highs range from the lower 80s south to the mid 90s north.
However, we tend to think the potential for showers and thunderstorms will remain focused along and just ahead of the cold front as it sinks southward through the area tonight. The precipitation should taper off from the north Tuesday night as the cold front continues to shift well south of the area.
After sunset winds will become light and a cold front will approach the state from the north. Cooler and drier air was noted to the E of the fnt, with temps in the mid 40s to mid 50s, with dewpoints still in the 40s. The fntl bndry wl eventually shift EWD today as low pres takes shape to our N, with warmer airmass overspreading the rest of the FA. Clouds and rain chcs on Tue wl result in cooler temps ovr the Nrn counties. Expect another unseasonably warm day to the S of the fntl bndry, with highs in the lower and mid 80s.
Winds are expected to be a bit more relaxed today under the ridge and with a weak surface gradient. The highest winds are expected to remain across the southeast where the surface gradient will be slightly tighter and dryline will setup this afternoon.
Tonight should be mostly clear as a cold front pushes through the area during the overnight hours. Given the late arrival of the cold air will side with the warmer MOS numbers and lower mins tonight several degrees to the upper teens across the far north, with middle to upper 20s across the south. Temperatures on Tuesday will be cooler, but still near normal for this time of year with highs ranging from the 30s across the north, with lower to middle 40s across the south.
308 PM CDT Mon Mar 20 2017 High pressure will drop down from Canada tonight bringing dry and cool conditions to northeast SD and west central MN. This upper level energy will bring light snow to areas south of Mobridge with up to an inch possible from Pierre south.
612 PM EDT Mon Mar 20 2017 Weak high pressure will slowly move east of the region overnight and Tuesday.
324 PM CDT Mon Mar 20 2017 Cold front/wind shift line is just entering the northwestern forecast area this afternoon. The Devils Lake basin remained under thicker cloud cover for most of the day, and with the arrival of a northerly wind shift, temperatures have remained a bit cooler out that way. Canadian high pressure will build southward into the area on Tuesday ushering in much colder air relative to Monday. Cool, northerly flow will keep temperatures below the freezing mark once again, except for maybe the far south along the South Dakota border. The forecast for this period starts off with cold high pressure sliding southeast from southern MB into the Great Lakes region.
A strong cold front will bring precipitation to the area tonight and Tuesday as it moves through the region. Cooler than normal temperatures and unsettled conditions will then prevail through the middle of the week in a cooler and unstable airmass.
344 PM CDT Mon Mar 20 2017 High pressure has yielded sunny skies across much of the Northland this afternoon while a cold front stretched across far northern Ontario, southern Manitoba, and southern Saskatchewan. Skies should remain clear this evening ahead of the cold front and temperatures will gradually cool off. Temperatures will trend cooler behind the front. Lows tonight will bottom out in the low single digits in northern Minnesota and the upper teens to low 20s over central Minnesota and northwest Wisconsin. Normally cold areas may see temperatures dip below zero overnight, but the strong winds may keep the boundary layer mixed and temperatures a bit warmer than otherwise expected. Highs on Tuesday will reach the low 20s in northeast Minnesota to the low 30s over central Minnesota through much of northwest Wisconsin.
Mostly clear skies will continue this evening as a cold front continues to slowly sag southward into the Southern Plains. As for temperatures, lows tonight look to range from the lower 40s north to lower 50s south. Highs will generally be in the low to mid 50s with the exception of along the KS/OK border where around 60 degrees will be found.
A Pacific storm system will begin to push into the region Tuesday bringing breezy conditions and cooler temperatures to the region.
554 PM EDT Mon Mar 20 2017 Some showers will cross the region tonight in advance of a weak cold front. Much of the region will be dry Tuesday with the exception of the ridges in the morning as low level moisture may be slow to exit the area. Have only slight chance to low chance precip to the far south with this feature as the favorable location within the base of the trough passes south of the CWA.
Lows across southeast Georgia are forecast to be generally in the lower 50s. Across interior northeast Florida, overnight lows are forecast to be in the mid to upper 40s, with temperatures in the lower 50s near the east coast. An upper trough will push across the Great Lakes on Tuesday, and a cold front will push southward into the Tennessee Valley. A broad area of low pressure is also forecast to be across the Carolinas.
309 PM EDT Mon Mar 20 2017 A weak cold front will move southeast through the region this evening bringing widespread precipitation to the area. It will be followed by an arctic cold front late Tuesday into Tuesday night.
As of 3 AM, a warm front was analyzed in a north/south fashion right along the U. This front will lift to the northeast this morning as low pressure slowly moves east across northern Missouri. Areas of the eastern Ozarks should see highs in the lower 80s. By late this afternoon, a cold front will begin to make its way towards central Missouri.
105 PM EDT Mon Mar 20 2017 High pressure over the area will move off to the east today. A cold front will move southeast through the region tonight and be followed by an arctic cold front late Tuesday into Tuesday night.
242 PM EDT Mon Mar 20 2017 A weak cold front will cross the region tonight. A stronger cold front will cross the area Tuesday night.
Rain chances will persist across the area into Tuesday as a couple of cold fronts move through the area. After a brief break mid week, frequent rain chances will return to the area late week into the weekend as a couple of low pressure systems move through. Temperatures will be tricky this afternoon as warm air sneaks into the area with an area of low pressure.
344 PM EDT Mon Mar 20 2017 Weak high pressure will slowly move east of the region overnight and Tuesday.
255 PM CDT Mon Mar 20 2017 At H5 closed low over the northeast Pacific with a ridge into Juneau. Trough from north central Canada into the Dakotas flattening the ridge over the lower 48 and then a closed low off the Atlantic Coast.
Showers and thunderstorms will gradually shift into southeast IL during today and linger southeast of I-70 this evening as cold front continues to press southward through that area. The cold front to push into central KY by dawn Tue with convection shifting south of highway 50 by overnight. Cooler lows tonight in the upper 30s over central IL and lower 40s in southeast IL. Cooler highs Tue range from lower 50s from I-74 north, to upper 50s to near 60F in southeast IL. Cooler lows Tue night in the upper 20s ne CWA and lower 30s SW CWA. 1037 mb high pressure builds southeast into lower MI by sunset Wed and brings more sunshine but below normal temperatures to central and southeast IL.
High pressure over the gulf and the ridge aloft is stopping a cold front that is currently trying to push south at this time.
/issued 434 AM CDT Mon Mar 20 2017/ This morning's surface analysis shows an area of high pressure centered SE of Vermilion Bay resulting in light SW winds across much of the CWA.
Issued by National Weather Service Jackson KY 317 PM EDT Mon Mar 20 2017 Low pressure and its associated cold front will track southeast across the southern Great Lakes and Ohio Valley today into tonight. The front will continue to move south of the area on Tuesday as cooler air begins to filter into the region from the north.
304 PM PDT Mon Mar 20 2017 A series of weather systems will bring cooler and more unsettled weather to the region this week. Ridge continues to shift eastward out of the region as moisture from a Pacific trough heads inland.
Northwest flow aloft will remain stagnant across the area with high pressure remaining at control at low levels. The ridge axis will continue to shift eastward through the evening hours, with low level flow becoming southerly/southwesterly this evening. In addition to visibility restrictions, this will help keep overnight lows considerably warmer than last night, with low to mid 50s inland and upper 50s to low 60s along the coast.
Most of the energy with this feature will ride north of the forecast area, with a weak troughline dragging through between 5 pm and midnight then clearing the area to the east late tonight. The cloudiness with this system will help hold temperatures down a degree or two and showers and a slight chance for thunderstorms are expected over the higher elevation, mainly north of a line from Montrose to Monticello. Tuesday should be drier but southwest winds will increase as the next trough approaches the west coast.
Zonal flow aloft has pushed a cold front into the area, which will continue to move southward this morning. The highest wind gusts will be across northern and central KS, and during the afternoon the winds appear to gradually decrease. Also tonight the low level jet strengthens over the frontal zone therefore isentropic lift and elevated instability could lead to shower and storm development.