Aikyam-Lab/Synoptic-Bench huggingface dataset:
Light freezing rain to continue this morning. Light freezing rain has occurred for many valleys of the Northern Rockies overnight and this morning. A second round of freezing rain, currently in the Idaho Panhandle will, move into northwestern Montana from 6am to 9am this morning, adding to the already icy conditions. 02" of ice, before freezing rain transitions to a mix of light snow and rain. Winter Weather Advisories, mainly for freezing rain, will remain in place until 11AM MST this morning. A quick building ridge of high pressure will begin to move over the region late today and Sunday, that will allow for drying conditions, with exception for northwest Montana, where light snow showers will linger through the weekend.
Near the surface, a strong high pressure center is expected to sit on the Carolina coast. With time, this high pressure will move off to the east bringing upslope flow against the southern Appalachia which will enhance a wedge that will seep into our forecast area.
Lingering cold air trapped in the Upper Hood River Valley will keep some pockets of freezing rain through sunrise, but temperatures are expected to rise above freezing within the next few hours.
However, increasing mid level clouds and the development of some ceilings around 4 to 5 kft are expected late in the period ahead of an approaching cold front and upper level trough. /issued 328 AM CST Sat Jan 6 2018/ With high pressure shifting east across the region, winds to become southeast at around 5 to 10 knots. Southerly flow to also maintain a warming trend with temperatures today expected to climb into the 50s while overnight lows fall to around freezing across southern Arkansas and southeast Oklahoma and the mid to upper 30s elsewhere.
Temperatures were very similar to this time yesterday morning across Texas and Louisiana with lows in the low to mid 30s. The low level jet will ramp up in the afternoon with disturbances approaching the area.
The terrain of far NW AR does pose some risk of maintain sub freezing temps through mid Sunday morning especially given the low dewpoint airmass that will reside across the region. Any patchy light precip could briefly be realized as freezing drizzle across this region early Sunday however any amounts are expected to be no more than a trace and duration will likely be very brief. As such will keep any precip chances low through late week with a sharp cool down following the associated cold front.
919 AM CST Sat Jan 6 2018 Quiet day across the Tennessee Valley, with high pressure at the surface promoting dry and sunny conditions across nearly all of the region. After bottoming out in the upper Teens this morning, abundant sunshine will help to raise temperatures into the mid 30s and above freezing once again by the afternoon. The one exception may be the higher terrain of Southern Middle Tennessee and Northeast Alabama where NE winds may help to reinforce this colder air mass in place. The strong low level ridge/shallow cold dome will still be anchored over the Carolinas into GA and far eastern AL through Sunday night.
934 AM EST Sat Jan 6 2018 Cold temperatures should continue as building high pressure ends any remaining snow showers today.
931 AM EST Sat Jan 6 2018 A deep area of low pressure will remain across the northern Canadian Maritimes today. High pressure will build south of the region this weekend.
0C--enough for freezing rain. It could also be freezing rain if the front structure isn't as cool and preserves the warm temperatures aloft. Thus have made only a brief mention of freezing rain in the Winter Weather Advisory, that mainly went out for the sleet and snow amounts in the south. The cold front passes through this evening, with a cold northerly flow behind that should bring temperatures colder, although continued moist flow producing upslope clouds could keep the Snake River corridor mild overnight until conditions really clear out Sun night.
LAST NIGHT OF SUB-FREEZING TEMPERATURES EXPECTED INLAND Late morning surface analysis depicts high pressure (1039 millibars) centered over the upper Midwest. deep troughing remains entrenched over the eastern third of the U. longwave trough was progressing east-southeastward along the Interstate 10 corridor in the Florida panhandle, with a thin cirrus shield approaching our inland southeast Georgia counties from the west. The longwave trough will progress eastward overnight, reaching the U. Surface ridging will become centered over the Ohio Valley overnight, and this weather pattern will allow low level winds to veer to northeasterly overnight, signaling the demise of cold air advection into our region. High pressure centered over the upper Midwest this morning will slide southeastward this weekend and will be positioned along the Carolina coast by late Sunday.
High pressure centered over the area this morning will gradually slip off to the southeast by evening. High pressure will keep the area mostly sunny today, but still cold through the afternoon.
/issued 334 AM CST Sat Jan 6 2018/ As upper ridge builds in from the west will have mild wx. Do have an upper trough moving ashore the NW Coast today that will cross the Rockies Sunday and pass to the east overnight. High pressure will return behind it.
/issued 250 AM EST Sat Jan 6 2018/ TODAY AND TONIGHT: High pressure building to our north will allow the low level wind flow to veer to a more zonal pattern across the region today. Tonight temperatures will also be warmer then the past few nights. Lows will be in the low to mid 40s interior and west coast. With temps in the low to mid 50s in the east coast metro and upper 50s near 60 for the Atlantic coastal areas.
617 AM EST Sat Jan 6 2018 VFR conditions throughout the forecast period with surface ridging keeping winds less than 10kts.
524 AM CST Sat Jan 6 2018 The leading edge of a much anticipated warmer air mass was beginning to move across North and South Dakota early this morning. However, over Minnesota, and western Wisconsin, arctic high pressure is still in control for one more day. As the warmer air mass spreads eastward tonight, temperatures may actually begin to rise and by morning a few 20s and teens will be common across southern and central Minnesota. The onset of warmer temperatures could also develop a band of light snow, especially in central and east central Minnesota later tonight. The frigid eastern trough lifting out of the country will allow mild Pacific air to flow eastward.
405 AM MST Sat Jan 6 2018 A cooler airmass remains over the eastern sections of the forecast area today with lower clouds and patchy fog this morning. The upper trough moving through the Intermountain Region today will move across the forecast area Sunday morning.
538 AM EST Sat Jan 6 2018 Cold temperatures should continue as building high pressure ends any remaining snow showers today.
Thus the heavy freezing spray aspect is questionable, depending on how quick the ice breaks up due to the increasing winds. There should be some freezing spray, but with the ice coverage may not be heavy. High pressure centered over the area this morning will gradually slip off to the southeast by evening. High pressure will keep the area mostly sunny today, but still cold through the afternoon.
Precipitation type will be rain or snow as lower valleys/basins will remain above freezing today. Sunday is dry but with increasing clouds as an upper ridge rebuilds over the Pacific NW.
851 AM MST Sat Jan 6 2018 After looking at recent trends with high res models and potential for dynamic lift over southeast Wyoming ahead of the upper level trough tonight, decided to increase POP and issue a Winter Weather Advisory for the Sierra Madre Range for 4 to 8 inches of snow. Downsloping should act to hinder pcpn over the plains with most of the snow falling over the higher peaks.
A low pressure system and cold front will move through the region today bringing a mix of rain and snow to the state. Areas of freezing rain is also a possibility before 10 AM this morning.
Both systems will result in cooler temperatures before a return to drier and slightly warmer conditions late in the week. An upper level ridge combined with offshore flow at the surface brought warm temperatures to the district today. The ridge is moving east as a frontal system approaches the northern california coast. The next front will be a little better supported by an upper trough moving into the Pacific Northwest and rain should spread into most of the CWA. So there could be a dusting of snow in the highest hills.
Light rain and drizzle continue to drift across the area behind the cold front last night. /issued 427 AM CDT Tue Apr 10 2018/ SHORT TERM (Now through Wednesday): The cold front has swept through the area earlier tonight, with modest northerly flow in its wake.
TFJ Synoptic Setup: Near Term begins with the High Plains of the CONUS and Canada under warming northwest flow. tot eh west a ridge runs up from the Desert Southwest through California, the Pacific Northwest, and crests over British Columbia. A trough lies off the coasts of each and backs north over the Aleutians. Ridge will pass over the area leaving clear to partly cloudy skies and dry conditions in the afternoon. brief light showers should start off as rain, but could quickly transition to snow with about an hour of a window for a couple hundredths of freezing rain or sleet. Wednesday Night: Meso-ridge will pass across the area allowing conditions to remain dry and warm slightly.
945 AM PDT Tue Apr 10 2018 Today will be another warm day under weak high pressure aloft.
A warm day with generally light winds is expected today as high pressure moves through the state. Southwest winds will begin to increase Wednesday, as a major low pressure system approaches the west coast.
It could be a little warmer, but we'll get that over the next 3 days.
625 AM CDT Tue Apr 10 2018 Surface map early this morning has high pressure sprawled out from the Central Plains up through our area. For today, a weak mid level trough drops southeastward out of the Northern Plains into our area today. will have to watch for the slight possibility of some freezing rain across Taylor county in north central WI late as surface temperatures cool. Lows Wednesday night will be near the freezing mark across north central WI to the middle 30s/lower 40s elsewhere.
759 AM PDT Tue Apr 10 2018 A cold front will bring a quick round of rain today with breezy winds across the basin for the afternoon. /Pelatti 12Z TAFS: A cold front will sweep across east of the Cascades this afternoon. Cold front passage will result in a wind shift out of the west to southwest in the afternoon with gusts between 20-25 kts.
This will maintain likely rain chances across the area with rain ending from north to south overnight as cold front finally makes a purposeful move across the area. Prevailing winds will shift out of the northwest late this afternoon at LEE/DAB behind the cold front which will reach south of SUA early Wed.
/issued 431 AM CDT Tue Apr 10 2018/ High clouds continue to clear from NW to SE this morning along a weakening cold front that is little more than a reinforcing shot of drier air. Cool canadian high pressure is quickly building in behind the front with breezy north winds prevailing today. Mild temperatures in this cooler air mass will result in highs nearly identical to yesterday with mid 60s to lower 70s.
1015 AM EDT Tue Apr 10 2018 Low pressure moves northeast and away from the area later today as high pressure builds in from the west. The high will be centered across the local area Wednesday and Wednesday night.
Temperatures are in the lower 80s. A cold front will move southward down the Florida peninsula this afternoon.
A vigorous cold front will bring windy rainy weather to Western Washington this morning, with sun breaks and showers in the afternoon. The higher passes should receive below advisory amounts and it will be mostly rain at Snoqualmie Pass.
1020 AM EDT Tue Apr 10 2018 Cool high pressure will extend across the middle Atlantic region though Wednesday.
1204 PM EDT Tue Apr 10 2018 High pressure will build in today with partly cloudy skies and highs in the mid 40s.
1148 AM EDT Tue Apr 10 2018 High pressure across Maine will retreat east and into the Atlantic today. Low pressure will pass well south of the region tonight as a weak trough crosses the area this evening. High pressure builds back into the area late tonight and Wednesday.
The current forecast is on track with highs in the upper 50s and 60s, and the only change was to adjust sky condition upward a bit to account for the weak upper trough late today and tonight.
912 AM EDT Tue Apr 10 2018 High pressure across Maine will retreat east and into the Atlantic today. Low pressure will pass well south of the region tonight as a weak trough crosses the area this evening. High pressure builds back into the area late tonight and Wednesday.
629 AM CDT Tue Apr 10 2018 12Z TAFS A dry cold front is pushing through the region this morning ushering in some slightly cooler air at the surface and much drier air aloft. A somewhat tight pressure gradient in the wake of the passing front will allow for breezy northerly winds to develop by mid to late morning which will continue through the evening before weakening overnight as high pressure becomes centered over the region. /issued 400 AM CDT Tue Apr 10 2018/ Sfc analysis this morning shows a weak cold front oozing through the forecast area with temps running about 10 degrees lower than this time yesterday. After a day of nearly seasonal temps today with highs in the lower/mid 70s, expecting another cool night tonight with mins dropping to roughly the 45-50 degree range all but near the coastline.
Some scattered cumulus were developing on the eastern side of the high. shifting southeast with some scattered alto-cumulus/cirrus on the western side of the high.
This afternoon a weak cold front will move into southeast Oregon, bringing additional showers and the possibility of a thunderstorm in and near Baker County. Cold front pushes into SE Oregon around 20-21Z with increased showers. Broad upper level trough in the Gulf of Alaska will bring a series of waves across the region in the short term with a potent cold front on Wednesday evening. The HRRR model brings a dry slot across SE Oregon and into the Snake Plain of southern Idaho this afternoon; if this feature pans out, it would produce gustier winds and warmer conditions than what is currently in the forecast.
This high pressure area will drift Eastward this afternoon into central AR so our winds will veer a bit to NE before sunset and then turn E/SE overnight. The return flow on the back side will make for warmer than average temps into midweek. /issued 431 AM CDT Tue Apr 10 2018/ High clouds continue to clear from NW to SE this morning along a weakening cold front that is little more than a reinforcing shot of drier air. Cool canadian high pressure is quickly building in behind the front with breezy north winds prevailing today. Mild temperatures in this cooler air mass will result in highs nearly identical to yesterday with mid 60s to lower 70s.
704 PM EST Wed Mar 7 2018 Cooler, drier air filtering into the area will allow for a cool night across west-central and SW Florida. Low to mid 50s across SW Florida and along the coast as those area will be moderated some by the warmer Gulf waters.
Upper troughing to remain over the eastern U. Within that trough, another weak upper level energy impulse will traverse the mid state overnight.
Ridging will continue to build over about the next 24 hours before the flow starts to flatten.
The initial system, the offshore closed low, has strong dynamics but the strong coastal ridge will be deflecting it Nwd and into the Pac NW on Thu. This short wave is in the Sly stream of the broad SW flow of the trof and taps a large reservoir of subtropical moisture which spreads NEwd mainly along/S of the I-80/US-50 corridor.
Weak surface trof currently near a line from Dalhart to Beaver will keep surface winds light and variable overnight at northern terminals. /Issued 239 PM CST Wed Mar 7 2018/ Latest satellite imagery reveals broad cyclonic flow centered over the Great Lakes with a weak ridge extending into the Great Basin. Except for some mid/high clouds, dry conditions are expected to persist with some breezy afternoons in response to some weak lee troughing, thus resulting in elevated fire weather.
708 PM EST Wed Mar 7 2018 Cold air will continue to be funnelled into the region through Thursday as a low pressure system tracks southeast through the Great Lakes.
Previous gusty W/NW winds will decrease thru the evening and overnight as much drier/cooler air filter down the peninsula. Cooler highs on Thu in the M-U60s areawide, except around 70 degrees for much of Martin County.
437 PM MST Wed Mar 7 2018 Current surface analysis shows high pressure centered over western ND, with frontal boundary just southwest of the area. Upper level analysis shows low pressure over the Great Lakes, with northwest flow over the Northern Plains, and a ridge along the west coast. A warming trend will take place late this week as western US ridge slowly moves east.
An extremely dry airmass remains in place on a northerly flow through the low and mid levels, trending westerly aloft. Aloft, the area is under a northwest flow on the backside of an east coast trough.
512 PM CST Wed Mar 7 2018 A strong 522 dm 500 mb low pressure over west central lower MI was generating broken to overcast stratocumulus clouds with bases of 3-5k ft over central and southeast IL along with isolated light snow showers and scattered flurries over central and eastern IL. Strong mid/upper level low pressure to track into southeast lower MI and southern Lake Huron by midnight tonight, pivoting a short wave from southeast SD and nw Iowa se across MO during this evening. Some decrease in the low clouds overnight especially over western CWA. Strong mid/upper level low to move over Lake Erie and nw PA Thu afternoon, with IL in a cool nw upper level flow.
Temps to cool to within a couple or so degrees of dewpoints, and overnight lows ranging from the lower 30s over sw AR to the upper 30s in ne TX appear on track. Northwest winds in the 15 to 20 MPH range will subside after sundown as high pressure becomes nearly centered over the ArkLaTex. Lows will bottom out in the 30s areawide, with a few locations dipping to the freezing mark by early Thursday morning.
429 PM MST Wed Mar 7 2018 The axis of high pressure shifts eastward a few degrees over the next couple of days allowing daytime temperatures to increase. A very weak disturbance in the ridge is bringing high cloud cover into the region this evening, which will persist overnight. This cloud cover will keep temperatures warmer tonight as compared to this (Wednesday) morning.
Late evening surface analysis depicts an intense low pressure center (986 millibars) along the Long Island/southern New England coast. Cool high pressure (1027 millibars) blankets the Midwestern U. High pressure will continue to gradually build into the southeastern states on Thursday.
Although freezing fog has not shown up much in Montana yet this evening, there are indications of some forming just across the Canadian border. Hickford A broad upper ridge is in place over the Pac_NW, resulting in northwest flow aloft for NE MT. As the ridge nudges closer, temperatures will creep up. Thursday afternoon and evening, the warm front disturbance brings limited moisture that may produce a half inch or so of snow. Expect a slightly warmer day that today.
532 PM CST Wed Mar 7 2018 241 PM CST Unseasonably chilly conditions will persist through Thursday as a deep upper level low centered over Lake Michigan this afternoon slowly pivots southeastward to the eastern Great Lakes by late Thursday. Stratocu should slowly erode from the west on Thursday as the influence of the upper low diminishes with its exit east. Castro 309 PM CST The upper level pattern is transitioning to a high amplitude, long wavelength pattern with high amplitude ridging over the wrn CONUS and troughing east of the Rockies. Wind speeds will increase Thursday morning with gusts into the lower 20kt range expected. cms 309 PM CST Low pressure over the Eastern Great Lakes will remain in place through Thursday afternoon. Meanwhile, high pressure will build over the Plains tonight.
835 PM EST Wed Mar 7 2018 A strong low pressure east of the New Jersey coast will intensify as it moves northeast to near Cape Cod by late tonight.
FREEZING TEMPERATURES EXPECTED ACROSS PORTIONS OF EASTERN Updated for evening discussion. Another clear cold night is in store for ARKLAMS region as high pressure builds to our west.
244 PM PST Wed Mar 7 2018 A ridge aloft will continue fair and mild weather with light winds through Thursday.
Surface wise, a cold front lies beyond 60 nm southeast of the island chain with a large area of high pressure centered over Southern Texas. In wake of the cold front which passed through our entire county warning area early this evening, cooler and drier air will filter in. Weak cold air advection will allow low temperatures to fall into the lower to mid 60s except near 60 degrees in the extreme Upper keys.
342 PM PST Wed Mar 7 2018 Dry weather and significant warming continues for the next couple of days as high pressure remains in control.
High pressure over the region will bring overall dry conditions through tonight with just some patchy fog across portions of north-central Montana tonight.
659 PM EST Wed Mar 7 2018 Latest water vapor imagery and RAP analysis shows a closed low over northern Lake Mi. Models indicate this low which provided enhancement to lake effect snow last night is expected to slide se tonight and reach the Lower Great Lakes by Thu morning. Light lake effect Wed night gradually diminishes through the end of the week, with only some flurries expected by Sat due to a ridge passing through.
558 PM CST Wed Mar 7 2018 A s/w continues to rotate around the large upper low centered over the Great Lakes region. Still, with temps not warming as much today, have trended twd cooler guidance. While the CWA will remain under CAA thru Thurs, the insolation shud allow for temps to climb into the lower, perhaps middle, 40s.
857 PM MST Wed Mar 7 2018 High pressure over the region will bring overall dry conditions through tonight with just some patchy fog across portions of north-central Montana tonight.
/issued 307 PM CST Wed Mar 7 2018/ The main impacts moving forward are continued elevated fire weather and a cold front with associated showers and storms this weekend.
1045 PM EST Wed Mar 7 2018 Cold air will continue to be funnelled into the region through Thursday as a low pressure system tracks southeast through the Great Lakes.
A flat upper ridge will remain over Utah and Colorado with moderate west to northwest flow aloft. Warmer temperatures are expected from the continuing downslope flow pattern. Otherwise, the forecast looks good with the high clouds moving over and warmer temperatures.
338 PM MST Wed Mar 7 2018 The axis of high pressure shifts eastward a few degrees over the next couple of days allowing daytime temperatures to increase. A very weak disturbance in the ridge is bringing high cloud cover into the region this evening, which will persist overnight. This cloud cover will keep temperatures warmer tonight as compared to this (Wednesday) morning.
610 PM CST Wed Mar 7 2018 The primary forecast challenge through Thursday is temperature as the pesky upper low slowly moves over the Great Lakes and a ridge builds over the Rockies. Cumulus fields developed this afternoon over the Sandhills with weak fgen and remaining cooler conditions in the mid levels. Lowered min temps (moreso in the Platte River Valley), especially with guidance trending cooler. With the upper ridge expanding onto the High Plains and an H85 thermal ridge approaching the area, the warming trend is on track.
/issued 346 PM CST Wed Mar 7 2018/ A broad trough continues to affect the eastern CONUS this afternoon, supporting the nor'easter bringing strong winds and winter weather to the northeast. These freezing temperatures will be covered by a Special Weather Statement instead.