Aikyam-Lab/Synoptic-Bench huggingface dataset:
309 AM PST Thu Jan 25 2018 A storm system will pass through the area today bringing light showers to the higher elevations of the southern Sierra and southern Great Basin. Breezy conditions will shift southward through tomorrow across the Mojave Desert ahead of an approaching cold front. The leading edge of a Pacific trough near the central California coast will move across the region through tonight resulting in a few showers over the Sierra and south-central Nevada and gusty winds to much of the area. Post-frontal winds behind a cold front are not forecast to be significant and no wind hazard products are anticipated.
Another sunny day is on tap for today as northwest flow aloft begins to back towards the southwest under weak ridging. A cut-off low currently located near southern New Mexico will accelerate northeastward tomorrow which will help to strengthen low-level southerly flow ahead of the main long wave trough. Low temperatures will be much warmer tomorrow night will dew points rising through the 40s.
610 AM EST Thu Jan 25 2018 High pressure builds in Thursday. Warmer to end the week. Cold front this weekend. Will be well into thickness recovery with the approach of a 500mb ridge and low level war air advection Thursday and Thursday night. Translation to warmer air at the surface today will be minimal, however, but this should prevent the sheltered valleys from bottoming out too far in terms of temperatures tonight. With plenty of sunshine and southerly flow, Friday will be a warm day -- with highs across the lowlands approaching 60 degrees. This will likely lead to wide spread in temperatures between ridges and valleys.
952 AM EST Thu Jan 25 2018 High pressure over the region will move off to the eat Friday.
With a good warm air advection pattern developing, we have maintained the trend of going on the high side of guidance for temperatures. Highs today should make it into the lower to middle 60s with the entire region experiencing nearly full sunshine. A shearing short wave trough will then approach the region from the southwest tonight. Friday looks like another windy day as the low level pressure gradient further tightens and supports brisk and gusty southerly winds.
643 AM EST Thu Jan 25 2018 Update/Aviation A mix of light snow and freezing drizzle is possible through the morning with isolated slick spots possible where the precipitation is more persistent.
12in and morning surface analysis showed a stout 1034mb ridge across our CWA from the northeast.
The highest waves will be in the northern marine zones and toward open waters given the wind direction.
851 AM EST Thu Jan 25 2018 High pressure builds in Thursday. Warmer to end the week. Cold front this weekend. Will be well into thickness recovery with the approach of a 500mb ridge and low level war air advection Thursday and Thursday night. Translation to warmer air at the surface today will be minimal, however, but this should prevent the sheltered valleys from bottoming out too far in terms of temperatures tonight. With plenty of sunshine and southerly flow, Friday will be a warm day -- with highs across the lowlands approaching 60 degrees. This will likely lead to wide spread in temperatures between ridges and valleys.
No significant changes were made to today's forecast; high pressure will continue to build eastward into our area. High temperatures are still expected to range from the lower-mid 60s across our area.
Amid a still dry and continental airmass, another sunny but mild afternoon is on tap, with readings topping out in the lower/mid 60s. As this ridging (along with high pressure at the SFC) shifts east of the area tonight, low to mid level wind fields will take on an increasingly southerly component, yielding the onset of increasing MSTR. Considerable cloud cover will help to some extent offset WAA FRI afternoon, with highs expected to be a few degrees warmer than today. Rains are expected to end W to E SAT night into early SUN with the passage of the relatively weak CDFNT, with a somewhat stronger push of drier/cooler air expected SUN night into MON.
Otherwise, thermal ridging will build into the state today with temperatures responding across the south where snow cover is minimal and southwest winds will increase and highs in the 40s to lower 50s will be common. Therefore, temperatures just above freezing seem likely near the Iowa/Minnesota border for highs although if more sunshine occurs, these readings will be on the low side. This will keep the low levels mixed overnight with the affect of warmer overnight lows in all areas. Have kept readings in the mid 30s from I80 southward and only to freezing in the far north.
A deepening lee trough across the High Plains will aid in a strengthening pressure gradient and a broad warm sector across the central CONUS. An upper trough moves into the central CONUS on Friday, with an associated cold front moving through the forecast area during the afternoon hours. Large scale ascent increases in advance of the trough, but limited vertical moisture is noted in forecast soundings, with shallow quality moisture present as the front moves through. Temperatures only gradually cool behind the front with the Pacific origin airmass and slow forward motion of the upper trough, still remaining above normal during the weekend.
528 AM CST Thu Jan 25 2018 252 AM CST Fair and mild conditions are in store today and tonight as 1035 mb high pressure slides east. The influence of troughing west to the west over the Plains will tighten the pressure gradient enough for sustained south and southeast winds of about 10-15 mph with gusts up to 20-25 mph south of I-80 during daylight hours.
This line has produced snow on nearly all of the West Side passes, and may even bring some snow down to the higher valleys. This line, along with more showers behind it, are expected to produce ongoing precipitation through at least midday, along with some gusty winds in the usual locations as the upper level trough slides by overhead.
Large high pressure over southeast US will only very slowly shift eastward into the western Atlantic. A relatively tight pressure gradient south of the high will result in increasingly windy conditions across the entire area. With high pressure near the NC coast and a tight pressure gradient NE winds will veer to the east and continue to 20-25 knots.
An approaching cold front will tighten the pressure gradient across the region Friday, result in increasing south winds.
With the low level flow becoming more east to southeast, temperatures are expected to moderate slightly. Highs today in the lower 60s. Lows tonight ranging from the lower 30s well inland to the upper 30s closer to the coast and a few low 40s at the beaches.
/issued 341 AM CST Thu Jan 25 2018/ Upper pattern has a trough moving ashore West Coast with a ridge extending up across the Central plains.
The high center wl cont to shift eastward away fm the region, with south winds further increasing the next few days. By Fri ngt, a new cold front wl apch NW AR with better rain chances returning to most of the FA.
/Issued 336 AM EST Thu Jan 25 2018/ High pressure will move overhead today, with a wedge remaining along the east coast through the remainder of the forecast period.
605 AM EST Thu Jan 25 2018 High pressure over the region will move off to the eat Friday.
A cold front is slowly pushing through eastern Washington and into the Panhandle of Idaho this morning. Along with the higher snow amounts, roads will change drastically under these bands, from wet, to slick snowcovered roads in a relatively short distance. Several inches of snow, of around 6 to 10 inches is likely for the higher terrain of north- central Idaho and mountain passes along the MT/ID border.
Upper level ridging extending north from Mexico will result in generally zonal flow aloft the area with a stable and dry air mass. High pressure in the central Gulf coastal region this morning begins to ease eastward. High pressure north of the waters provides prevailing northeasterly winds today with a slight easing of the gradient.
626 AM EST Thu Jan 25 2018 Dry high pressure over the region today will move off the coast Friday. A cold front will bring rain to the region over the weekend.
318 AM MST Thu Jan 25 2018 Aside from very patchy freezing fog in deeper river valley locations early this morning, the other observation point is high cloudiness streaming across the region at times as indicated by satellite imagery. A large upper ridge previously over the western U.
Low level wind shear is expected later tonight as southerly winds aloft increase ahead of an approaching area of low pressure. High pressure will slide east today while low pressure begins to push into the northern/central high plains. We should climb into the mid 30s to lower 40s today, coolest in the southeast, warmer west of Madison. Still, the mixing and warmer airmass in place will keep temps mostly in check, only falling into the upper 20s to lower 30s.
Upper ridge axis tracks across the Plains today, with upper level flow turning southwesterly by this evening ahead of a trough digging into the northern Rockies. Unseasonably warm temperatures will continue into Friday, as a trough moves into the northern and central High Plains.
541 AM CST Thu Jan 25 2018 High pressure will continue to drift eastward into the Appalachians, allowing a southerly return flow to bring warmer conditions to central Illinois today. Thanks to continued southerly flow, lows tonight will be warmer than in recent nights. with readings remaining in the lower to middle 30s. As a cold front begins to approach from the northwest on Friday, the pressure gradient will tighten across the Midwest.
1021 AM EST Thu Jan 25 2018 Strong high pressure north of the area will shift east to the mid-Atlantic coast today. Strong high pressure north northwest of the area will bring increasing winds/seas to the area today.
High pressure will rebuild over the Eastern Pacific on Friday with drying conditions returning to the district.
High pressure will then build over the area for a return to dry weather with morning valley fog. Cold front is currently producing showers over the area, mainly north of Kern County. Several inches of snow are expected in the Sierra Nevada above 6000 feet, with the highest amounts towards Yosemite. High pressure will build over much of California on Friday and into the weekend.
Ridging is the dominant feature over the western U. with troughing extending from New England southward along the eastern seaboard. Close to home here in Florida, upper level ridging from the Bahamas extends west over southern Florida and into the Gulf of Mexico. As the trough over the eastern seaboard exits into the western Atlantic, the ridge out west builds into the region and will be the dominant feature over the east coast to end the week. On the surface, high pressure to the west will control the weather with continued rain-free conditions expected for the remainder of the week.
SHORT TERM (Now through Friday): A 500mb closed low is currently located over the northern Mexican state of Chihuahua to near El Paso. With thick cloud cover and increasing rain chances expected around peak heating, dropped temps down a few degrees with highs in the lower 60s, which may even be a tad too warm. Scattered light showers will be possible through the night with the best chance falling over the lower Rio Grande and the coastal waters. Surface winds shifting to the southeast will allow afternoon temperatures to warm up to near normal in the low 70s. Stayed on the cooler side of guidance with lower certainty of cloud cover and rain chances, which would hinder daytime heating.
955 AM EST Thu Jan 25 2018 Flurries should continue until high pressure returns dry weather later this morning through Friday.
Temperatures have cooled off a bit faster overnight when compared to the previous forecast, so adjusted temps a bit lower to see morning lows in the low to mid 20s. Should winds pick up a bit higher than 10 to 15 mph and mix the low levels a bit further, min RH values could fall a bit further.
A Pacific cold front will move across the state today, resulting in areas of light snow. Best chances still look to come across western and southern Montana, while the remainder of the area sees only isolated to scattered snow and/or rain showers and slightly cooler temperatures. Cooler temperatures and a continued chance of light snow are then expected on Friday, with the best chances for snow in the mountains and some lower elevation areas of southwest Montana.
Am a little hesitant to get too aggressive with clearing out skies with a southeast wind that has warmer air moving over a dense snowpack. In addition, we look to stay north of the warm front this whole period. Based on the RAP/HRRR, this clearing looks to make it up to about I-94 by the afternoon, so have that for now, though as long as we stay north of the warm front, this may be too optimistic. Tonight we will see SSE winds strengthen ahead of the cold front moving across the Dakotas. Southerly flow will increase Friday ahead of a cold front associated with a system traversing eastward across southern Canada. The only area without snowpack, west central Minnesota, will be behind the cold front by late Friday morning.
Areas of dense fog formed during the night near the low cloud/clear interface and just east of it a bit as SE winds start to advect in higher dew pts over a cold/snowy ground. HRRR did reasonable in depicting the low cloud cover and this early morning it shows some clearing spreading northward toward GFK mid to late aftn. Temps rising to above freezing seems doable in areas where low clouds clear as will have just high clouds and enough warm advection. 850 mb warm advection is quite strong by this evening into the overnight with strong inversion developing as warmer air moves over the colder 925 mb and below layer. If any precip would occur it would be light freezing rain/drizzle due to warm air at 850 mb.
418 AM CST Thu Jan 25 2018 Areas of dense fog formed during the night near the low cloud/clear interface and just east of it a bit as SE winds start to advect in higher dew pts over a cold/snowy ground. HRRR did reasonable in depicting the low cloud cover and this early morning it shows some clearing spreading northward toward GFK mid to late aftn. Temps rising to above freezing seems doable in areas where low clouds clear as will have just high clouds and enough warm advection. 850 mb warm advection is quite strong by this evening into the overnight with strong inversion developing as warmer air moves over the colder 925 mb and below layer. If any precip would occur it would be light freezing rain/drizzle due to warm air at 850 mb.
High pressure is expected across the area through Friday.
Southeasterly winds and modest warm air advection will allow daytime highs to climb into the lower to middle 30s. Even with breaks winds will turn southerly as a surface warm front lifts north keeping lows tonight relatively warm in the 20s. By Friday the warm front lifts north with relatively strong southerly winds and warm air advection. Highs Friday are expected to soar into the 40s across the entire area as a low pressure system moves through southern Canada.
Upper air analysis showed a weak low over west Texas and ridge axis from central Texas to the Northern Plains and stronger trough was approaching the Northwest Pacific. Upper level low over west Texas will become a short wave and track northeast to Missouri Thursday night. This short wave is expected to track to the Great Lakes on Friday but leave deep moisture across the Lower Mississippi Valley, especially along the coast.
This storm system will remain north of New Mexico, dragging a dry cold front through the state Friday. Cooler temperatures along with brisk west and northwest winds will move in behind the front on Friday.
Much of interior NorCal is seeing a relative break early this morning as precip associated with the front has shifted into central California while showers are spreading across NW California ahead of the approaching upper trough. Showers, along with a few thunderstorms (small hail will be the primary threat), will increase across the region today as the upper trough moves overhead.
A cold front will move through the Great Basin region today, bringing some light snow to the region.
240 AM PST Thu Jan 25 2018 A low pressure trough moving inland across the State today, will bring breezy, cooler weather and perhaps a few light showers along and west of the mountains. This trough will also bring gusty west winds to the mountains and deserts. Cool again on Friday, then high pressure building over the West will bring back warmer weather and another round of gusty Santa Ana winds over the weekend. Surface pressure gradients have turned back onshore at 7 MBS KSAN to SW NV and 2-3 MBS to the lower deserts. Winds will be gusty over the ridges and onto the deserts slopes, but mostly below Advisory criteria. It will be much cooler today and on Friday A low pressure trough is sliding across the State this morning and will continue eastbound on Friday.
Southwest flow aloft developing over southwest Montana early this morning while upper level ridge axis shifts into the Dakotas. Surface cold front moving into western Montana at 3 a. Cold front moves across the area during the afternoon hours which will bring cooling temperatures but not a dramatic airmass change. Best chance for precipitation over the lower elevations looks to be post frontal in the evening hours as a stronger round of height falls catches up with the front. Mountains will benefit from orographic flow so through Friday could see 3 to 6 inch snowfall amounts in the high country. Will be a cooler day but looks mainly dry as orographics will be the main driver of precipitation.
/issued 340 AM CST Thu Jan 25 2018/ A closed upper low over southern New Mexico will open up as it moves across the South Plains and Panhandle today. However, seeing how dewpoints were several degrees lower than guidance yesterday, have gone on the low side of guidance for this afternoon. A surface cold front extending from a low over the Great Lakes is still on track to move through the South Plains Friday evening.
410 AM MST Thu Jan 25 2018 Current surface analysis shows low pressure over southeast Alberta, with warm front extending southeastward into the Northern Plains, north and east of most of the CWA. Upper level analysis shows ridge axis now over the high plains, with long wave trough and area of low pressure along the Pacific NW coast. High clouds continue to push over and through the ridge, bringing variably cloudy conditions. The cold front will arrive over northeast WY late this afternoon and push east-southeast across the rest of the area during the evening hours.
530 AM EST Thu Jan 25 2018 Flurries should continue until high pressure returns dry weather later this morning through Friday.
Rain chances will remain high on Sat with the passage of the cold front as well. 6 inch values are on the highest end of the climatological norms for PWs for this time of year. The building upper ridge in the wake of the front (and its associ- ated upper trof) should help to clear things out quickly Sat night into Sun morning. High pressure over E TX will weaken and slide east today with pressures falling on the Lower and Coastal Bend which should turn winds easterly.
1014 AM EST Thu Jan 25 2018 High pressure will build into the region and provide dry conditions through Friday night.
Tonight a upper level trough will move from the Canadian Rockies into the Canadian Plains. This will force a cold front into the area by tomorrow morning.
A low amplitude upper level trough was skirting by this morning just to the south - isolated thunder well south of KLBB. We will undergo minor height rises on Wednesday as upper level winds begin to back in advance of the next upper level trough.
/issued 248 AM CDT Tue Sep 19 2017/ Persistence will dominate the forecast for the upcoming seven days as an upper ridge remains over the middle part of the country.
Subsidence from this ridging may be enough to suppress coverage of afternoon convection, but seems unlikely to entirely defeat the emergence of showers and storms.
There is weak mid level trough with some moisture transport along the Oklahoma state line this morning that is strong enough to support some morning showers and thunderstorms which should dissipate by mid morning as the moisture transport weakens. Despite the proximity of this weak cold front, moisture transport is very weak and CIN is rather high.
Weak troughing remains over the Mid South today. Hot and humid weather will continue again today with highs reaching the lower 90s. /issued 248 AM CDT Tue Sep 19 2017/ Persistence will dominate the forecast for the upcoming seven days as an upper ridge remains over the middle part of the country.
724 AM EDT Tue Sep 19 2017 Aviation A weakening area of low pressure will track through southern parts of Lower Michigan today. An area of high pressure shows up for Wednesday resulting in mainly dry conditions.
High pressure will remain in control of our weather today.
1100 AM EDT Tue Sep 19 2017 Update A weakening area of low pressure will track through southern parts of Lower Michigan today. An area of high pressure shows up for Wednesday resulting in mainly dry conditions.
Latest surface analysis shows a north/south oriented high pressure ridge along the eastern seaboard and extending into north Florida. Weakening of the high pressure ridge along the eastern seaboard and extending into north Florida has caused the local wind fields to diminish to 10 knots or less.
Surface analysis showing weak high pressure holding across the area. Flow remains southerly in the lower levels maintaining steady influx of gulf moisture and feeding the ongoing fog development.
Outside of convective activity, winds will be primarily from the south today and tonight, with the higher speeds occurring from mid-morning through early evening. With the 850mb thermal ridge expanding a little farther east across our area, temperatures are expected to be a little hotter than yesterday, with highs this afternoon in the mid to upper 90s. Lows tonight are expected to be in the lower to mid 70s.
Low pressure aloft will remain over the region through Wednesday for cool and unsettled conditions. High pressure aloft will gradually move over the area from the west the latter part of the week for a drying and warming trend. An upper trough over the area will weaken today.
A ridge forming over the Ohio Valley and Great Lakes is still expected to trap a portion of an upper-level trough over the Appalachians and cause this feature to move westward across the Deep South.
Weak surface ridging will keep pressure gradients weak allowing winds to stay light and less than 10kts.
High pressure with a dry airmass across the area will result in mostly sunny skies today. reaching the lower 90s inland and mid/upper 80s at the coast where an afternoon sea breeze will develop.
the remaining areas will see slightly cooler conditions with only an isolated rain shower possible.
Weak mid level qg ascent this afternoon and evening with the passage of the trough to the north. An upper level trough will move across the nrn Rockies this aftn and evening with brisk WSW flow aloft over nrn CO. Meanwhile a pacific fnt will move across the plains during the early evening hours with a brief period of gusty NWLY winds behind it which will bring cooler temperatures.
Elsewhere though, sunshine abounds thanks to upper level ridging and subsidence associated with Jose, spinning off the Eastern Seaboard. Temperatures at 850 hPa will be a degree cooler today and this will hold back highs a degree or two cooler than yesterday with highs in the mid 70s to the lower 80s today. Tonight strong ridging will grip the region, with clear to partly cloudy skies and temperatures dropping down into the upper 50s to lower 60s. with 590dm heights over the Lower Great Lakes averaging some 2-3 STD above typical late Sept values. The warmer valleys will likely experience highs in the upper 80s. mins will continue to range from the mid and upper 50s across the Southern Tier and parts of the North Country to the low to mid 60s across the lake plains.