Aikyam-Lab/Synoptic-Bench huggingface dataset:
1101 AM CST Wed Dec 13 2017 Have updated winds today due to prevalent 45 mph gusts upstream in Iowa behind approaching cold front. Deep upper low moving into the Upper Midwest this morning on the surface map. so expect some of the higher gusts from mid morning to early afternoon, once the inversion breaks. A cold front moving through Central IL will bring a round of sprinkles/flurries today before clearing the area after sunset. Whereas clouds tonight will help to keep the lows in the 20s, tomorrows high temps will be about a 10-15 degree departure from todays. Cold air in place for Thursday keeps the high temps just below freezing.
SHORT TERM (Tonight through Thursday Night): Large expansive cirrus deck invading from the wests through the Lower Rio Grande Valley this afternoon with a tap well into the tropical Pacific.
1151 AM MST Wed Dec 13 2017 Cold front will move through the area this morning, with a period of gusty north winds behind it. Relative humidity values may drop into the upper teens this afternoon, but winds will be diminishing by that time as the cold front continues south. Temperatures will warm into the lower 40s, so no accumulation is expected, but wet bulb zero heights still low enough to mention snow.
312 PM CST Wed Dec 13 2017 High pressure centered over the western Gulf of Mexico this afternoon. Low pressure over southwest Wisconsin with a cold front extending through Missouri and Oklahoma into the Texas Panhandle. Upper low over Baja California aiding moist upper flow from the Pacific Ocean across Mexico into the Gulf of Mexico is spreading cirrus deck across the south half of Texas toward Louisiana.
117 PM MST Wed Dec 13 2017 Cold front will move through the area this morning, with a period of gusty north winds behind it. Relative humidity values may drop into the upper teens this afternoon, but winds will be diminishing by that time as the cold front continues south. Temperatures will warm into the lower 40s, so no accumulation is expected, but wet bulb zero heights still low enough to mention snow.
Forecast was updated for light snow showers this morning as far south as the Snake Basin in Idaho, as a short wave trough has come in from the northwest stronger than forecast by models. Trough is also cooling the air above 5000 feet MSL which will weaken, but not remove, the inversion below. Fog will decrease in the Magic Valley as the trough passes and the dense fog advisory should end there by 11 AM. Widespread low stratus and fog in the lower valleys, with MVFR/IFR/LIFR conditions. The increase in moisture aloft could help to seed the lower stratus adding to the potential for very light snow (flurries). The upper low is well east of the area by evening, returning dry conditions for tonight and Thursday.
Another cold front will approach the area overnight with winds shifting around to the west and eventually northwest late in the TAF cycle.
Short wave trough and scattered light snow showers passed through Idaho zones this morning, and was already out of our CWA by noon. The trough weakened the inversion and decreased the fog, but the inversion is still there.
The water vapor pictures show the upper trough pushing southeastward over eastern Idaho. Models show this trough to move across the CWA tonight.
With these light winds and dry air mass, temperatures should drop into the low to mid 30s for all areas tonight. Would normally expect the low lying areas around I-10 to drop even more, but a veil of high clouds should keep temperatures from bottoming out like they did earlier today. Another weak cold front will move across the area Thursday morning, shifting winds around to the north. It will also bring slightly cooler temperatures to the area, although in reality it will only really bring us back down to around normal, with highs mainly in the upper 50s and lower 60s.
110 PM EST Wed Dec 13 2017 High pressure and reinforcing cold air will be moving into the region today.
High pressure will build over the region tonight and persist through Thursday night.
Colder air will filter into western Kansas tonight in wake of a cold frontal passage earlier today.
A closed upper low sits over the northern New England states with broad troughing extending south through the western Atlantic. The base of this trough moves northeast allowing for a more zonal upper level pattern to set up over the Florida peninsula through the short term period. On the surface, high pressure in the western Gulf of Mexico will slip east keeping rain-free conditions, light winds and cool temperatures over the region this evening. The high will move over southern Florida by Thursday morning which will cause a shift in the winds to the south-southwest.
Winds turn more south to southwest around 10 kts through the afternoon as high pressure slips southward over the Gulf. A gradual moderation in dewpoints expected by late in the day as high pressure axis shifts to the south over the Gulf. Southwest flow and bump in moisture means low temps stay above freezing for most tonight, with the exception being areas north of Highway 84 where temps could dip to around freezing.
1137 AM CST Wed Dec 13 2017 Another dry cold front is poised to drop through the region today.
Today will provide another day of mild weather before a cold front brings breezy and colder weather on Thursday.
Surface wind flow will become northwesterly at < 6kts after passage of a dry cold front this evening. As a cold front approaches today, southwest winds will increase and become gusty. Today Through Thursday Night High pressure remains over Arkansas and the dry conditions will remain over the state through Thursday. A cold front will move through the state this afternoon and evening as low pressure moves through the midwest. This will bring increased southwest winds to the state and expect the highest winds in the east.
For Brown County in particular, the worst conditions should be felt over the northern part of the county, where snow totals will be the highest, and the gustiest winds (to around 30 mph) should occur coming down the Bay.
Much of the area has seen RH below 25%, but the 20 ft winds above 15 mph have been much more limited so far, and not coincident with the lowest RH. During the night, the clipper system's cold front will pass through. With a return to cold air advection, the low levels will moisten in the upslope flow once again, and low clouds should develop. A cold front will pass through tonight and winds will veer toward the northwest.
408 PM EST Wed Dec 13 2017 High pressure over the region will move south overnight.
Otherwise, there were a few flurries in southeast ND and northeast Sd in a moist cyclonic flow around the strong low pressure system near Lake Michigan.
301 PM EST Wed Dec 13 2017 The jetstream has lifted north to the northern Gulf Coast, supporting mean layer ridging over the Gulf of Mexico and the Yucatan Peninsula. Surface observations and loops from visibile satellite imagery place the center of high pressure just to our northwest over the extreme southeastern Gulf of Mexico. As the high approached the Florida Peninsula, in conjunction with the dissipation of the density surge, northeasterly breezes have collapsed. High temperatures reached the upper 60s in the Lower Keys, and the lower 60s in the Upper Keys.
Tonight and Thursday The latest RAP analysis and satellite/radar imagery show low pressure moving into north-central WI early this afternoon. Low pressure will continue to move southeast towards northern Ohio this evening.
217 PM EST Wed Dec 13 2017 Deep low pressure will pull away into eastern Canada today into tonight with widespread light snows and snow showers tapering off. Winter headlines have been cancelled as prevailing snow has diminished across most of the area outside the higher elevations of northern Vermont where a few more inches of snow is likely through the remainder of the daylight hours. 2" locally here at KBTV, and the highest amount in Chittenden County being 8.
1043 AM MST Wed Dec 13 2017 Current surface analysis shows low pressure over northeast IA, with tight pressure gradient extending back to the west across much of the Dakotas and Central Plains. Upper level analysis shows high amplitude ridge remaining along the west coast, with a long wave trough over the eastern US. Converted the high wind warning for the Rapid City area over to a wind advisory a bit earlier. The cold front has made its way through the CWA, and skies are clearing behind it.
A weakening area of low pressure over the Gulf of California will result in partly cloudy conditions along the International border today.
318 PM EST Wed Dec 13 2017 THIS AFTERNOON AND TONIGHT: Another cool day across South Florida with temperatures currently maxing out in the low to mid 60s across the region. Tonight's forecast will lean on the cooler side of guidance, with temperatures dipping into the upper 30s around Lake Okeechobee and low 40s for the remainder of the interior.
433 PM EST Wed Dec 13 2017 Low pressure will continue to lift north of the region tonight. A large area of Low pressure will remain to our north on Thursday as a weak low slides well to our south.
1020 AM MST Wed Dec 13 2017 Current surface analysis shows low pressure over northeast IA, with tight pressure gradient extending back to the west across much of the Dakotas and Central Plains. Upper level analysis shows high amplitude ridge remaining along the west coast, with a long wave trough over the eastern US. Converted the high wind warning for the Rapid City area over to a wind advisory a bit earlier. The cold front has made its way through the CWA, and skies are clearing behind it.
1210 PM EST Wed Dec 13 2017 High pressure in place across the region, wind will be northwesterly through this afternoon and evening. Tomorrow, with high pressure directly over South Florida winds will be light and variable around 5 knots. So lowered the temps inland a bit with forecast lows now dipping into the upper 30s in traditionally cooler spots inland during this kind of event. /issued 413 AM EST Wed Dec 13 2017/ Latest WPC surface analysis shows the center of a well defined low pressure system over Maine, with a cold front extending south southwest, draped across the far tip of South Florida. Minimum temperatures are on track to plummet into the low 40s near Lake Okeechobee this morning, to around 50 along the east coast metro.
1001 AM PST Wed Dec 13 2017 Many of the lowlands across eastern Washington and north Idaho will continue to be covered by low clouds.
335 PM CST Wed Dec 13 2017 A dry cold front will continue to move across the Mid South from late this afternoon through late evening.
A dry cold front that swept into the region today will exit to the southeast this evening.
At the surface, high pressure has shifted to the east with southerly to southwesterly flow across the region. Winds are also increasing with the high to the east and low to the northwest. The cold front will rapidly move through the forecast area later tonight into Thursday morning.
321 PM CST Wed Dec 13 2017 Weak lift along a frontal boundary draped across northeast SD will continue producing patchy freezing drizzle and light snow through this evening. The precipitation should mainly impact the higher terrain areas of the Sisseton Hills. The upper level flow pattern remains progressive through the extended with a number of troughs moving through the northern plains.
358 PM CST Wed Dec 13 2017 Gusty northwesterly winds will continue to diminish across the region through the evening and overnight hours as the pressure gradient continues to relax behind this mornings cold front. despite the cooler airmass that has filtered in across the region. As the atmosphere begins to saturate down to the lower levels ahead of this disturbance.
309 PM CST Wed Dec 13 2017 A 992 mb low is centered near Milwaukee this afternoon and a cold front trailing from the low southwestward through roughly the I-55 corridor, pushing southeastward. Brisk winds were gusting up to 40 mph well ahead of the front, with a short lull in winds until behind the cold front where gusts to around 45 mph are prevalent, with the winds shifted to WNW. Overnight, winds will gradually decrease as a high pressure ridge approaches from the west. Winds will end up light WNW only around 5 mph during the day Thursday as a result of the ridge. Expect lows tonight back down to the low to mid 20s as cold post-frontal air moves back in from the northwest, with highs Thursday only in the low to mid 30s.
Will continue to have the possibility of some patchy fog or mist or freezing drizzle across the ND side with lack of ice nuclei aloft. Current air/road temperatures suggest mainly rain within and west of the valley, with freezing rain east of the valley. With that said, had a situation here at the office in Grand Forks where the rain occurred with air temperature above freezing while road temperatures where below freezing. Short waves continue to roll over the upper ridge over western North America and drop into the Northern Plains. Next upper level trough over the eastern Pacific will approach the forecast area on Fri. Long wave pattern maintains a long wave ridge over the eastern Pacific or the West Coast. Long wave trough remains over eastern Canada and the northeast US.
217 PM EST Wed Dec 13 2017 High pressure over the region will move south overnight.
With clear skies, very dry air in place and winds dying off quickly, temperatures will fall of rapidly post- sunset with overnight mins reaching the L40s, with U30s over the south interior, closest to the high center (and a climatological "cool spot" within the CWA), as well as in a few sheltered interior spots farther north. south Florida high center expands eastward with WSW-SW flow developing across ECFL, north of the ridge axis.
314 PM CST Wed Dec 13 2017 Upper level closed low continues to stagnate over the California Baja steering the southern jet and any moisture associated with it across south Texas while a vortmax on the east side of a sharply amplified ridge across the Pacific Northwest will move south across the Rockies over the next 24 hours.
317 PM EST Wed Dec 13 2017 Weak high pressure builds in tonight and tomorrow while a weak disturbance moves by to our south.
Fog is eroding a bit faster than 24 hours ago in the Rogue Valley so expect it be a bit sunnier and warmer today on the valley floor there. The blocking high pressure ridge continues, but a weak frontal system was able to push in over Washington and British Columbia into the Northern Rockies in the past 24 hours, weakening the top of the ridge some.
A strong upper level ridge will maintain dry and stagnant conditions across most of Western Washington through Thursday afternoon.
Low level winds support lake effect snow bands transitioning from the Twin Ports east across the south shore, with the highest amounts expected across the Bayfield Peninsula and Gogebic range.
248 PM MST Wed Dec 13 2017 Snow will end across southwest Montana by tonight, with high pressure building aloft and skies clearing across the area for Thursday.
1134 AM CST Wed Dec 13 2017 Have updated winds today due to prevalent 45 mph gusts upstream in Iowa behind approaching cold front. Deep upper low moving into the Upper Midwest this morning on the surface map. so expect some of the higher gusts from mid morning to early afternoon, once the inversion breaks. A cold front moving through Central IL will bring a round of sprinkles/flurries today before clearing the area after sunset. Whereas clouds tonight will help to keep the lows in the 20s, tomorrows high temps will be about a 10-15 degree departure from todays. Cold air in place for Thursday keeps the high temps just below freezing.
A cold front will move through most terminals overnight (except KFST) and result in a wind shift to the north and northeast with winds generally less than 10 knots. A cold front will move into the area after 14/00Z, resulting in a N/NE wind shift at area terminals as it progresses southward. Over the last several days we've had a west coast upper ridge and east coast upper trough delivering a steady diet of cool air via frequent dry frontal passages, followed by brief warmups. However, each successive run of deterministic models and ensembles are breaking down/retrograding the upper ridge off the west coast and digging an upper trough farther southwestward over the intermountain west.
1247 PM EST Wed Dec 13 2017 Deep low pressure will pull away into eastern Canada today into tonight with widespread light snows and snow showers tapering off. Winter headlines have been cancelled as prevailing snow has diminished across most of the area outside the higher elevations of northern Vermont where a few more inches of snow is likely through the remainder of the daylight hours. 2" locally here at KBTV, and the highest amount in Chittenden County being 8. Clear to partly cloudy skies then continue into Thursday night as weak high pressure bridges across the area.
Warm front now over lower Mississippi river valley will lift northward, with clouds lowering/pcpn starting by mid evening in our south, where a likely-categorical event is anticipated overnight. Pops taper to low chances north/west, as warm front becomes quasi stationary across west TN. Time/height cross sections reveal a wedge of dry air aloft works down overtop the high lower trop moisture, suggesting potential for low clouds/drizzle later tonight and possibly lingering into tmrw. This sets the stage for warm front's lift north, and a warmer/more (elevated) unstable environ for Thu-Thur night.
High pressure at the surface promoting a beautiful All Hallows Eve, with a sunny sky and temperatures in the low to mid 60s. NNE winds have helped to keep temperatures in check somewhat today, but this will change heading into the overnight hours as winds veer back to the SE and eventually the SW by daybreak as a deepening broad upper trough amplifies over the Southern Plains into the Mississippi Valley. Additionally, cannot rule out a few very light showers overspreading the region underneath this low canopy of clouds after 06z, and have an isolated to widely scattered shower mention between 06-12z, generally west of I-65. Pattern change will take effect beginning Wednesday as the aforementioned upper-level trough will slowly move east into the Mississippi Valley.
With the lowering cloud bases along the frontal boundary and areas upstream hinting at it, added some patchy fog to the forecast for tonight, mainly north and east of Glasgow. Westerly and northwesterly winds will accompany the cold front. Best model agreement shows that the cold front will not be directly north-to-south progressive which will allow rain to remain the predominant precip type south and west of Fort Peck Lake. Wednesday night, model consensus keeps NE Montana dry and cold under a very large broad upper-level trough stretched over the entire continent.
then transition to a S/SE direction on Wed as a warm front lifts north. Today Through Wednesday Night Active northern stream continues with an upper trough translating across the Upper Midwest and largely zonal flow across the southern CONUS. Broad isentropic lift north of the front, compounded by the passing upper energy, will yield a broad area of precipitation with the highest PoPs across south and southeastern AR. South of the warm front, some destabilization is expected with precipitation becoming more convective in nature.
A stronger system will move into the region and bring increasing wind, cooler temperatures and chances of valley rain and mountain snow over the weekend.
1043 PM EDT Tue Oct 31 2017 A warm front will move into the Ohio Valley on Wednesday and push through Pennsylvania Wednesday night.
925 PM PDT Tue Oct 31 2017 Cool weather will continue this week under weak low pressure aloft.
Vsbys will also drop in heavier showers and with some fog forming as a warm front pushes back northward after midnight. Winds will be mostly light and variable overnight with the front lingering south, and then they will trend SE with the returning warm front shifting north with speeds increasing to near 10 kts. Also, a warm front over se TX into central LA may shift slightly nwd, providing additional focus for enhanced rainfall and provide trigger for tstms as stg low lvl shear and decent mid lvl lapse rates already in place. Meanwhile, a stg upper lvl ridge building over nrn MEX will create upper level difluence over eastern portions with an overall warming trend as highs climb into the 80s over the wknd.
Vsbys will also drop in heavier showers and with some fog forming as a warm front pushes back northward after midnight. Winds will be mostly light and variable overnight with the front returning back north, and then they will trend S/SE behind the retreating warm front with speeds increasing to near 10 kts.
847 PM EDT Tue Oct 31 2017 High pressure will continue to lift NE along the Carolina Coast tonight and will leave a weak ridge back across the region.
/issued 414 PM EDT Tue Oct 31 2017/ Tonight-Wednesday night: A large mid-upper level area of high pressure is located to the southeast of South FL, while the area remains under the influence of low-level ridging to our north. The ridge is forecast to slide eastward.
825 PM EDT Tue Oct 31 2017 A warm front will move into the Ohio Valley on Wednesday and push through Pennsylvania Wednesday night.
Trick-or-treat time looks relatively calm with a weaker gradient in place, though you might want to opt for the warmer costume with temps only in the 20s to lower 30s by sunset. Farther south is not a big issue where warmer boundary layer temps should maintain mostly rain through this event (maybe a little mix with snow at the onset). North of I-94 is where the issues exist, as entrenched cooler/drier air and very strong lift should offset initial warming through the column, suggestive that we will see a pretty good burst of snowfall from about midday Wednesday through early evening, before weakening forcing and precip rates allow better boundary layer warming to likely win out for a mix or change to rain.
While there are moist layers around 850 mb and near the freezing level of 13,000 feet, a cap remains in place above 850 mb.
1041 PM EDT Tue Oct 31 2017 Dry conditions will give way to precipitation moving into the region late tonight into Wednesday as a warm front lifts northward.
A weak upper level short wave trough will move across the Southern Appalachian region through the forecast period.
920 PM EDT Tue Oct 31 2017 High pressure will build into the mid-Atlantic through tonight.
720 PM EDT Tue Oct 31 2017 Just some passing high clouds across the forecast area this afternoon as high pressure remains over South GA and stalled dry front resides just north of the area.
515 PM MDT Tue Oct 31 2017 Upper level analysis has weak ridging off the West Coast with broad trof across the central CONUS. At the surface, high pressure has shifted into the mid-Mississippi valley with low pressure developing across north-central Montana. A cold front will arrive early Wednesday and move southeast across the CWA during the day. Snowfall will mostly be limited to the higher elevations of northeast WY, the Black Hills, and far northwest SD. The higher elevations of the northern Black Hills and WY Black Hills will likely see an inch or two of snowfall later tonight into Wednesday morning.
720 PM EDT Tue Oct 31 2017 A weak cold front will dissipate over Virginia and the Carolinas tonight before re-emerging over the Tennessee Valley as a warm front Wednesday.
805 PM EDT Tue Oct 31 2017 High pressure will settle over the area tonight as an approaching cold front stalls to the northwest. High pressure to remain in control overnight.
535 PM MDT Tue Oct 31 2017 Latest upper air analysis shows the long wave trough moving onto the Plains. Ahead of the trough light snow was continuing to move east. Lows will be a few degrees warmer than last night due to warm air advection.