Aikyam-Lab/Synoptic-Bench huggingface dataset:
A cold front will move slowly southwest across the terminal sites on Friday, with winds becoming northeast. /Issued 545 PM CST Thu Feb 8 2018/ For the 00Z TAFs, a cold front will move slowly southwest across the terminal sites on Friday, with winds becoming northeast. Pre-frontal trof will bring wind shift into northern sections Friday morning, with true cold front lagging a bit behind. Saturday expected to be much colder with northeast half of forecast area remaining below freezing. Modest upslope flow and isentropic lift will be augmented by strong frontogenetic forcing as sharp 700 mb trof/baroclinic zone passes.
Banded snow is likely if not one intense band somewhere near the Highway 20/30 corridor. However, some very weak forcing will exist across the southern half of Iowa into the afternoon and may be sufficient for some additional light flurries or even some freezing drizzle with some drier air at mid levels and loss of ice introduction at times.
/issued 154 PM CST Thu Feb 8 2018/ Underneath weakish mid-level flow on Fri the thermal ridge will remain anchored to the w. Cold front will make its surge s between 09Z-12Z Sun AM and by 21Z 85h temps across PB (possibly SE NM) will be 0C or less. Turning warmer Mon-Wed with sw flow aloft.
300 AM MST Fri Feb 9 2018 High pressure will continue to hold in place the remainder of the week resulting in above normal daytime high temperatures.
/issued 240 PM CST Thu Feb 8 2018/ (Tonight and Friday) Warmer conditions have returned to West Central Texas this afternoon, with readings in the upper 50s and lower 60s.
As an upper trough drops out of Canada Friday, zonal flow will return to the area, then to the southwest by Saturday morning. High pressure will slide east of the state tonight. A cold front will move through the Plains Friday, as a warm front moves north through the Gulf of Mexico. The warm front will move to the northeast but will help to slow the cold front.
Records for Feb 9 below: Feb 9 Mod 75 (2006) RBL 78 (2006) RDD 78 (2006) DTS 73 (2016) SAC 73 (2016) SCK 73 (2016) High pressure over the eastern Pacific and west coast bringing fair and unseasonably warm conditions today. The resulting breezy north winds on Saturday will usher in cooler air bringing down daytime highs several degrees from what they have been over the last several days.
12Z trends, including experimental highres guidance, would bend snow band hard north Fri morning and bring accumulating snow to a halt south of highway 6 for an extended time before dropping back south mid-late aftn timed with passage of weak sfc frontal wave seen in much of the highres guidance. Can not ignore nam projection along with some similar highres support but even these collapse south into the highway 30 corridor later Fri aftn. Given potential lull in accumulating snowfall and temps warming to above freezing along srn edge of snow gradient, have leaned toward an advisory. Short term system is followed by another robust warm advective push Sat night through Sun cwa wide, ahead of secondary sw disturbance spinning up through swrn periphery of large scale trough across the plains Sun.
900PM UPDATE: Arctic high pressure is rapidly filling in from north to south with glasgow and wolf point no longer reporting snow and visibility lifting slowly for KSDY and KGDV. Tonight, a large upper high west of California and an equally large upper low over northern Hudson Bay have directed a northwest flow over Montana. the frontal boundary between the Arctic air mass of the low and the warm air of the upper high will run from NW Montana to SE Montana.
Wind gusts up to 50-55 mph will be possible, especially in the higher elevations of east Central Alabama, through this evening. The upper level low associated with Irma will remain over the Mid Mississippi River Valley through Wednesday, and will leave low rain chances in the forecast with lingering moisture across the area.
A mostly dry cold front moves in tonight and Wednesday morning and moves east of the Cascades Wednesday night.
321 AM PDT Tue Sep 12 2017 The best coverage for showers and storms today will be across Inyo and Lincoln counties with more isolated activity possible across the higher elevations elsewhere.
254 AM CDT Tue Sep 12 2017 254 AM CDT Generally translucent cirrus shield on the northwest flank of former tropical cyclone Irma will filter sunshine today, but temps should still rebound nicely, climbing well into the 70s. Once again today, winds off the lake will temps a bit cooler lakeside. - Izzi 254 AM CDT In the wake of Irma's remnants, a more progressive pattern will set up over the CONUS, starting with an amplifying long wave trough over the western U. Downstream amplification of an upper level ridge should set the warming temperatures locally heading into the weekend.
By 00Z this evening, the low should be near Pickwick State Park and will have filled by a few more millibars so that the surface pressure gradient will be a bit more relaxed than now.
Movement of the upper low off the California coast northward may push scattered clouds into central Oregon overnight. High temperatures today were up 5-10 degrees from yesterday so expect overnight lows to be warmer. The upper low will drift a little further north Tuesday with scattered clouds and possibly a few showers or thunderstorms into central and northeast Oregon. An upper level trough will push a cold front through the region Wednesday dropping temperatures about 10 degrees and increasing westerly winds.
A flat upper ridge will hang on for one more day. As an upper trough moves into southern British Columbia, downslope flow will slightly increase and this will lead to warmer temperatures today compared to yesterday. Wednesday will be about 5-10 degrees cooler as mid level heights falls. The highest chance PoPs will be over the west, with likely PoPs over the mountains.
At the sfc, high pressure across east Texas, will slowly shift to the east through the next 24 hours.
Rather brisk and somewhat gusty northerly winds can also be expected today as the low level pressure gradient remains rather tight. Temperatures will be warmer with more sunshine expected, especially in the afternoon. Highs should range from the middle 70s over the eastern Ozarks to the lower and middle 80s along and west of the I-49 corridor.
411 AM EDT Tue Sep 12 2017 After a cool start to the day with valley fog, high pressure will keep things dry and mostly sunny today with temperatures surging into the mid 70s to lower 80s for highs.
High pressure remains sprawled across much of the Great Lakes region early this morning. The northern edge of the high cloud shield from Irma will clip our far SE CWA. Low temps tonight range from the mid 40s across interior sections of Northern Lower Michigan to the low to mid 50s across the rest of our CWA.
High pressure surface and aloft will gradually build over the Florida peninsula through Wednesday with increasing large scale subsidence over the region. to around 90 and the lower 90s over the remainder of west central and southwest Florida.
654 AM EDT Tue Sep 12 2017 After a cool start to the day with valley fog, high pressure will keep things dry and mostly sunny today with temperatures surging into the mid 70s to lower 80s for highs.
220 AM EDT Tue Sep 12 2017 Upper air pattern consists of a closed 500 mb low off the CA coast, a ridge over the Rockies, Irma over the sern U. Pattern changes little except to have a trough in sw Canada 12z Wed. Towards the end of the week and through the weekend, zonal flow aloft will begin to transition to southwest flow ahead of developing longwave troughing across the western CONUS.
426 AM MDT Tue Sep 12 2017 The upper level ridge of high pressure that has generally been over the region for the past few weeks will finally break down for a few days.
Thereafter, as an UA trough moves onshore across the northwest Pacific tomorrow, the UA ridging dominating across the western CONUS will shift eastward, which will aid to eject the remnants of Irma towards the northeast CONUS.
239 AM PDT Tue Sep 12 2017 A closed low will linger off the coast today before shifting eastward Wednesday.
The higher resolution mesoscale models do a better job of showing how important that expanse of higher terrain along the Tennessee and North Carolina border is in limiting rainfall intensity across much of the Great Valley when a strong easterly flow is present in the region. Wind speed will continue to be a factor through late morning in the lower elevations and should continue a little while longer into the early afternoon for higher terrain. It won't be quite as cool farther northeast through the valley with highs ranging from the upper 60s to the lower and middle 70s.
613 AM EDT Tue Sep 12 2017 High pressure will remain over the region through Wednesday.
The higher resolution mesoscale models do a better job of showing how important that expanse of higher terrain along the Tennessee and North Carolina is in limiting rainfall intensity across much of the Great Valley when a strong easterly flow is present in the region. Wind speed will continue to be a factor through late morning in the lower elevations and should continue a little while longer into the early afternoon for higher terrain. It won't be quite as cool farther northeast through the valley with highs ranging from the upper 60s to the lower and middle 70s.
227 AM MDT Tue Sep 12 2017 Water vapor shows flat upper ridge across the northern tier. Flat upper ridge expected to dominate our weather through Wednesday, with hot and mostly dry conditions continuing. Cooler air will then begin spilling into the cwfa behind Wednesday's wave, with upper trof continuing to dig through the Pacific Northwest through the end of the work week.
350 AM MST Tue Sep 12 2017 Storm chances will be slight and confined to the higher terrain of Arizona today and Wednesday.
Maximum temperatures this afternoon may reach the low 90s, typical for this time of year.
/issued 245 PM CDT Mon Sep 11 2017/ SHORT TERM (Tonight through Tuesday Night): High pressure building over the area is now in control. Winds will be light tonight under clear skies and with low temps ranging from the mid 60s to the lower 70s, just a skosh below normal. A residual elongated mid level trough will lie over the area in the short term, basically an extension of the low associated with Irma, but high pressure will control the surface and upstream ridging will slowly build east over Texas. A few mid to upper clouds may movie over from the north Tuesday night, as a short wave moves south through the main mid level trough.
Current observations show temperatures in the mid 50s in the northern reaches of the forecast area near Conroe, ranging up into the low 70s along the coast. Begin to see heights rise starting in the eastern counties (Chambers, Liberty, and Polk) late Wednesday as surface ridging builds back into SE TX.
223 AM PDT Tue Sep 12 2017 Slow moving low pressure over California combined with above normal moisture will produce good chances for showers and thunderstorms each day through Wednesday.
317 AM CDT Tue Sep 12 2017 254 AM CDT Generally translucent cirrus shield on the northwest flank of former tropical cyclone Irma will filter sunshine today, but temps should still rebound nicely, climbing well into the 70s. Once again today, winds off the lake will temps a bit cooler lakeside. - Izzi 254 AM CDT In the wake of Irma's remnants, a more progressive pattern will set up over the CONUS, starting with an amplifying long wave trough over the western U. Downstream amplification of an upper level ridge should set the warming temperatures locally heading into the weekend.
1152 PM MDT Mon Sep 11 2017 Weak mid/upper level low spinning over central WY is maintaining line of showers and a few t-storms from west of Douglas to northeast of Rawlins. Little change seen over the next couple days with upper ridging holding from the desert southwest into Wyoming with warm mid-level temps limiting convection to mainly the higher mtns. This begins flattening the upper ridge over the area and may allow for a little more convective coverage Weds afternoon and evening across mainly southeast Wyoming.
326 AM EDT Tue Sep 12 2017 Dominant high pressure will slowly slide east into the Mid Atlantic as we head into the latter half of the week. as temps will be warmer than normal for this time of year along with dry wx. afternoon temps should top out in the low to mid 80s. H8 temps look a degree or two cooler.
The high clouds generally thin enough for continued radiational cooling through the remainder of the night. Ridging at the surface and aloft persists as low/mid level temps continue to moderate. Warmer airmass in place so min temps won't be as cool with readings mostly in the 50s, and some upper 40s in the colder spots.
131 AM EDT Tue Sep 12 2017 High pressure will remain across the region into Tuesday. High pressure will return for the weekend. High pressure should keep conditions dry thru tonight while high clouds from Irma spread north across the area.
1019 PM PDT Mon Sep 11 2017 Warm weather will continue into Tuesday as high pressure lingers over the Inland Northwest. A cold front passes through Wednesday and brings gusty winds and cooler temperatures for the rest of the work week.
Tropical storm Irma with 45 mph winds was defined by a 994 mb low pressure over sw GA and moving nw at 16 mph. Our far NW counties could dip into the lower 50s due to the delay in cloud arrival. Temperatures will top out in the lower 70s S of I-70, with some upper 70s possible farther to the NW, or west of I-55. The rain chances will dissipate from west to east Wed afternoon and Wed night, as the low gets absorbed into the upper level flow.
646 AM EDT Tue Sep 12 2017 Upper air pattern consists of a closed 500 mb low off the CA coast, a ridge over the Rockies, Irma over the sern U. Pattern changes little except to have a trough in sw Canada 12z Wed.
356 AM CDT Tue Sep 12 2017 (Today and Tonight) High pressure to our west, and the remnants of Irma to our east will put us under northerly flow aloft today. However, these north winds will not result in any cooling, and if anything with slightly warmer temperatures at 850mb today, we will likely see warmer temperatures by a few degrees across the area today. Lows are also expected to warm some, dropping down into the lower 60s mainly.
/06Z TAFS/ Stable and dry high pressure at low levels and light northerly flow aloft will keep an almost cloud-free environment over South Central TX over the next 30 hours. Weather remains very quiet over South Central Texas with an upper ridge over the desert southwest and Irma moving into the southeast United States. Winds will be from the north on Tuesday but that will likely be the last day as lee side troughing will bring back the southerly flow mid week.
The cutoff low will be absorbed back into the main flow aloft Wednesday, ushering in a mid-week ridging pattern overhead. An active upper-level pattern over the Northern Plains may help to provide sufficient surface forcing and moisture supply ahead of a cold front for widespread precipitation late in the weekend.
643 AM EDT Tue Sep 12 2017 High pressure will remain across the region today.
Scattered showers/tstms over the mtn areas will continue through the evening hours, with isolated to scattered pcpn over the high valley locations. Showers and thunderstorms will redevelop on Tue, with the best coverage being over and near the higher terrain. High temps will probably be around 5 degrees above average on Tue across the southeast plains, with around to slightly above average temps in the high valley locations. The monsoonal ridge is forecast to break down by mid week and troughing is forecast to take shape over the western conus. high pressure over the Desert Southwest, stretching north into Colorado will continue to produce shower and thunderstorm activity across the region. A disturbance in the northerly flow around the upper ridge will once again produce a round of showers and thunderstorms.
334 AM EDT Tue Sep 12 2017 After a cool start to the day with valley fog, high pressure will keep things dry and mostly sunny today with temperatures surging into the mid 70s to lower 80s for highs.
Thus, lowered today's highs slightly as readings should be a bit cooler than yesterday.
505 AM EDT Tue Sep 12 2017 Upper air pattern consists of a closed 500 mb low off the CA coast, a ridge over the Rockies, Irma over the sern U. Pattern changes little except to have a trough in sw Canada 12z Wed.
Downgraded last night to a Tropical Depression, the low is centered over the Alabama/Georgia border this morning and expected to slowly lift to the NW. The clouds will inhibit the sunshine, but the generally warmer air mass will result in high temps in the 70s across the state. Chance pops remain in place for all of Wednesday, slowly retreating in the evening as the low finally moves out to the NE. In the wake of the remnants from Irma, a weak ridge quickly moves across the region.
As the low continues to lift from southwest Georgia into northern Alabama, the precipitation will spread north into ILN/s southern counties. Most of the higher res models are showing a band of pcpn weakening as it lifts north across our area through the day on Tuesday as it continues to encounter some drier air. The clouds will help keep temperatures down some through the day with highs near 70 to possibly the low 70s. Will then continue with a chance of showers through Tuesday night as the upper level low begins to shift northeast toward our area.
553 AM CDT Tue Sep 12 2017 254 AM CDT Generally translucent cirrus shield on the northwest flank of former tropical cyclone Irma will filter sunshine today, but temps should still rebound nicely, climbing well into the 70s. Once again today, winds off the lake will temps a bit cooler lakeside. - Izzi 254 AM CDT In the wake of Irma's remnants, a more progressive pattern will set up over the CONUS, starting with an amplifying long wave trough over the western U. Downstream amplification of an upper level ridge should set the warming temperatures locally heading into the weekend.
Otherwise mostly sunny skies were observed over the state while surface observations showed northerly winds with temperatures in the upper 70s to lower 80s and dew points at unseasonably low levels in the lower 50s. The far west/northwestern portion of the state will likely see temperatures climb into the lower 70s still with little to no rain chances.
Temperatures will recover into the low to mid 70s today, with the stronger winds diminishing by late this morning. On Wednesday, the trough axis associated with Irma's remnants will shift east across the Ohio and Tennessee valleys during the afternoon. As the low pressure trough advances north and east Wednesday night, deep low level moisture will spread across the coal fields.
Main thing will be the return of warmer than average temperatures for the next two days, as north to northwest flow aloft continues.
Few clouds along the decaying cold front moving through the UP of Michigan and some high thin cirrus south from Irma. Temperatures have indeed risen into the lower 70s across much of nrn Michigan. The DPVA to our north departs by early this evening, while the cold front decays while sliding in over nrn Michigan around daybreak Tuesday. Readings likely falling into the upper 40s and lower 50s in the NW CWA, and the lower to middle 40s across the SE where those winds above the sfc won't be as strong for slight mixing.
Warmer weather will return during the middle of the week and persist until the weekend. For more detailed potential impact information refer to our Hurricane Local Statement /HLS/, Tropical Cyclone Watch/Warning Statement /TCV/, and/or Hurricane Threats/Impacts Graphics which are all available from our website at: http:/weather.
Upper level ridging is now centered near the 4-corners with Irma having moved into the mainland Southeast. The upper ridge will then edge eastward with the center moving south into Mexico allowing an upper low off California to eject northeastward across the Rockies.
They once again have stayed fairly anchored to the high terrain with very little drift due to light steering winds aloft. The high pressure ridge will shift westward back over the area Tuesday as the tropical remnants of Irma move through the southeastern states towards the Tennessee and Mississippi Valleys. Overall this should result in a downturn in storm activity on Tuesday compared to today, but enough moisture will still be recycled under the high to keep the threat of afternoon storms in the forecast mainly over high terrain. Wednesday should start off fairly dry with storms forming over the higher terrain by the afternoon. A strong Pacific Low will dive southward into the Pacific Northwest and force the California low eastward through the Great Basin and across our area as an open wave trough.
351 AM EDT Tue Sep 12 2017 Zonal flow across southern Canada will do little to move the dominate ridge of high pressure thats been over the region for several days now. Another change in the weather compared to the previous few days under the ridge will be the increased cloud cover associated with the remnants of Hurricane Irma.
134 AM MDT Tue Sep 12 2017 Main forecast issue continues to be the low chance of thunderstorms in the western portion of the area for tonight. So again went toward the cooler guidance. High temperatures look to be near to maybe slightly cooler. Based on recent trends and guidance will go close to a touch cooler than todays temperatures. Ridging/no lift will make for a dry and sunny day. There will be a trough that will move east, northeast over the region during the period and bring with it chances for precipitation.
1138 PM MDT Mon Sep 11 2017 Main forecast issue continues to be the low chance of thunderstorms in the western portion of the area for tonight. So again went toward the cooler guidance. High temperatures look to be near to maybe slightly cooler. Based on recent trends and guidance will go close to a touch cooler than todays temperatures. Ridging/no lift will make for a dry and sunny day.
647 AM EDT Tue Sep 12 2017 Localized subsidence along the periphery of the Irma remnants will lead to a long duration of strong surface ridging over southeastern Michigan. Zonal flow across southern Canada will do little to move the dominate ridge of high pressure thats been over the region for several days now. Another change in the weather compared to the previous few days under the ridge will be the increased cloud cover associated with the remnants of Hurricane Irma.
353 AM EDT Tue Sep 12 2017 High pressure will remain across the region today.
Meanwhile, an upper trough in western Canada will approach the Northwestern U. A moist SW flow will begin to shift eastward as a drier/stable air mass pushes into SE Oregon ahead of the trough. A cold front situated ahead of the trough is expected to reach Baker City and Burns late in the afternoon. Temperatures will be 3-5 degrees lower on Wednesday, except 5-10 degrees lower from Baker County to northern Harney County with the arrival of the cold front.
306 AM CDT Tue Sep 12 2017 An upper high centered over the 4 Corners region continues to dominate the weather for west Texas. An upper low off the coast of CA will cause the ridge to gradually deamplify and push eastward through the week.
355 AM MDT Tue Sep 12 2017 High pressure aloft and stretched area of weak deformation remain over the region for one more day before a pattern change. Satellite imagery indicates the best energy has shifted east of the Continental Divide over the last 24 hours, so that means showers and thunderstorms may be a bit more isolated over the high terrain today. A closed low remains off of the coast of California before it begins forward motion eastward on Wednesday. A longwave trough dropping south from Canada is anticipated to drive this closed low eastward toward the Central Rockies mid to late week. Southwesterly winds will strengthen late Wednesday as the trough approaches from the west.