Aikyam-Lab/Synoptic-Bench huggingface dataset:
Overnight water vapor imagery shows upper ridging dominating the western portions of the CONUS with an upper trough axis over the Mississippi Valley. Thin cirrus was over most of the local area other than one area of lower stratus in northeast Kansas that was being ushered east as westerly winds develop behind a modest low level ridge to the east. West surface winds in the WAA should provide a warmer day with highs in the 50s being common.
Meanwhile an upper level trough will be moving onshore in the Pacific Northwest.
513 AM CST Sat Feb 1 2020 The temperature forecast today uses the warmer MAV guidance plus bias correction for highs in the 50s to near 70. Strong high pressure across Colorado will break down tonight and be replaced by low pressure across the cntl High plains Sunday. The cold air will back into Nebraska during the day Sunday cooling highs across nrn Nebraska first with the cooler air arriving across swrn Nebraska late Sunday afternoon. The temperature forecast Sunday leans on the cooler short term model blend but this might be too cool as the models show nearly full sun conditions and this could hold up the progress of the cold air. Arctic high pressure will build across Alaska and begin moving south tonight.
Clouds will continue to cast shade on the Midwest, however southerly winds will begin to usher warmer temperatures to central Illinois.
Highs on Sunday will be a bit cooler, although still well above average ranging from the mid 30s to mid 40s.
The reason this is important is that it has helped usher in some drier, as well as warmer air. While the lower clouds will continue to shift east into the morning we will still be fighting some higher level clouds. The Buffalo Ridge may also see some slightly strong winds. The fairly strong westerly gradient remains in place through the night which will lead to mild overnight temperatures, some locations remaining above freezing. Sunday will be another mild day, but cooler air will leak south through the day and limit just how warm it could get.
520 AM CST Sat Feb 1 2020 Dry weather conditions and much warmer air will prevail across the region for this weekend. Daytime highs will be even warmer on Sunday with near record highs possible as GEFS 850mb model temperatures show 2-3 positive normalized anomaly values.
Temps tonight likely not falling a lot, and not be suprised to see higher escarpment area west of Grand Forks up thru Walhalla stay above freezing all night.
SHORT TERM (Now through Sunday): A large 500 mb trough axis will clear through Deep South TX later today allowing for weak 500 mb ridging to build in place throughout tonight. Some mid level cld cover will continue advecting over the area from west to east today ejecting out from the 500 mb closed low centered over western and northern Mexico. This 500 mb closed low is expected to move generally NE out of the eastern Pacific into NW Mex by Sun Night. The surface ridging centered to our NW will shift to our E-SE Sat and Sun. This will allow the low level winds to shift around from the S-SE increasing the WAA on Sun.
323 AM CST Sat Feb 1 2020 Overnight water vapor imagery shows upper ridging dominating the western portions of the CONUS with an upper trough axis over the Mississippi Valley. Thin cirrus was over most of the local area other than one area of lower stratus in northeast Kansas that was being ushered east as westerly winds develop behind a modest low level ridge to the east. West surface winds in the WAA should provide a warmer day with highs in the 50s being common.
Light winds and warmer temperatures can be expected today over most of the region, though north breezes will linger along the Colorado River Valley from Lake Mohave to Lake Havasu.
/issued 431 AM CST Sat Feb 1 2020/ (Today and Tonight) Early this morning, infrared satellite imagery showed clear skies across West Central Texas, while westerly winds at the surface are keeping temperatures slightly warmer than at this time yesterday. Upper level ridging will move into the region today, continuing the clear skies, dry weather and also bringing warmer conditions, with highs rising into the upper 60s to around 70. Lows tonight will likely be a bit warmer as well, in the mid 30s to low 40s.
958 AM EST Sat Feb 1 2020 The slow moving cold front is near Orlando early this morning and will move south across southern portions of east central Florid into late afternoon. Improving conditions expected behind a cold front from north to south into late afternoon with VFR conditions returning to MCO between 20Z-22Z. Then a period of strong NW winds will develop this evening and overnight as low pressure deepens along the mid Atlc coast.
Upper level analysis places ridge over the western CONUS with trough from the Great Lakes into the Midwest. Forecast soundings show a low level dry layer, but a little of this may be reaching the ground, so will go with low chances for rain/freezing rain for a few hours and see how this evolves. For today, warmer air continues to push into the area leading to well above average temperatures over the region. Somewhat of an exception looks to be the southwest in the higher terrain where warmer temperatures are expected. Cold front then pushes into the area overnight.
/issued 430 AM CST Sat Feb 1 2020/ WV imagery shows a deep upper trough moving through the MS Valley, courtesy of a highly-amplified ridge pushing east through the wrn CONUS. However, this will transition to zonal over the next 24 hours or so as troughs traverse Canada and tamp down the ridge as it moves east. Sunday will be even warmer as the next trough makes landfall on the west coast, transitioning zonal flow aloft over the region to SW. Leeside troughing on the Front Range will begin developing ahead of this feature, further veering sfc winds to the SW and resulting in an even warmer day than today. The trough is forecast to strengthen and dig down to UT by 00Z Tue.
A trough of low pressure was moving through northern Minnesota and northwest Ontario early this morning and there may be some light mixed precipitation over far northeast Minnesota early this morning. Warm air advection was occurring and it will continue into tonight before cold air advection develops late tonight into Sunday behind a cold front. 850MB temperatures are forecast to rise to 0 to 5C across the Northland with even warmer temperatures a bit higher. Surface temperatures are also expected to rise overnight in the strong warm air advection and we have most areas rising above freezing tonight. The low will continue to move east/southeast on Sunday pulling away from the region.
954 AM EST Sat Feb 1 2020 Light snow is expected this morning with a transition to drizzle by early afternoon as temperatures climb above freezing. Highs tomorrow will be in the low to mid 50s for most locations with clearing skies by the afternoon.
Immediately behind the inverted trough, low stratus, drizzle and patchy fog have developed, so have also included this into the morning forecast. Precip should exit our eastern counties by around midday or early afternoon as the upper trough axis also pulls through. The sky should readily clear tonight behind the trough axis.
431 AM CST Sat Feb 1 2020 (Today and Tonight) Early this morning, infrared satellite imagery showed clear skies across West Central Texas, while westerly winds at the surface are keeping temperatures slightly warmer than at this time yesterday. Upper level ridging will move into the region today, continuing the clear skies, dry weather and also bringing warmer conditions, with highs rising into the upper 60s to around 70. Lows tonight will likely be a bit warmer as well, in the mid 30s to low 40s.
Afternoon high temperatures will be in the lower to mid 40s. Warmer temperatures are in store for the area on Sunday. Radar is showing temps slightly above freezing, keeping all the precip as rainfall. As this weak disturbance moves out of the region, upper-level ridging will arrive today. This will bring warmer temperatures to the area, as WSW winds increase. Clouds will begin to decrease overnight into Sunday morning, as the driving Low pressure system pulls all moisture out of the Midwest and towards the east coast.
/Issued 345 AM CST Sat Feb 1 2020/ Upper trough axis has pushed east of the area early this morning, leaving the forecast area with clear/mostly clear skies and drier air. Sunday will be even warmer with mid 70s forecast across much of the area.
Pacific storm brings much cooler conditions with light precipitation Sunday into Sunday night, mainly over the foothills and mountains.
438 AM MST Sat Feb 1 2020 Western CONUS ridge continues to shift east, with very mild and breezy conds expected today before a strong cold front settles into the region Sunday. Cold front will quickly push through the region Sunday, with temps falling in the afternoon.
618 AM EST Sat Feb 1 2020 Low pressure will move away from the region today with an upper level trough crossing the area in the afternoon and evening.
517 AM CST Sat Feb 1 2020 Today still looks like there will be a significant warm-up with upper level ridging and downsloping winds helping to also warm things up. I expect some isentropic lift occurring north of the front to the south, and could give us some light snow/flurries and even some freezing drizzle, considering dry mid-levels.
Then slow clearing as front exits and high pressure builds in although MVFR SC TIL 19-01Z. Showers exit the waters by afternoon as a front slides across the state and high pressure begins to build in.
he upper trough is swinging through with some cold mid to upper temps. High pressure will build through the start of the new week and begin to depart afterwards as a new cold front begins to approach.
635 AM EST Sat Feb 01 2020 Low pressure will move well offshore the middle Atlantic coast this morning. An upper level trough and accompanying weak surface cold front will cross central NC later today and this evening.
Saturday will be warmer than normal. Sunday will hit about normal with a cold front moving through the Great Basin, but will seem cold by comparison.
A west to southwest wind will usher in warmer temperatures, and it will feel a whole lot more like spring than winter locally. As ridging occurs, clouds will dissipate and there will be plenty of sunshine.
Speeds will decrease to 3 to 7 mph tonight, but will stay up in the higher elevations of northern/western Arkansas. A west to southwest wind will usher in warmer temperatures, and it will feel a whole lot more like spring than winter locally. As ridging occurs, clouds will dissipate and there will be plenty of sunshine.
Skies expected to clear as the main trough axis exits the region. Pleasant conditions are in store today as the main upper trough axis exits the region leading to clearer skies. Under clearing skies, temperatures should be able to rise into the lower 70s. Temperatures will be warmer Sunday mostly in the mid to upper 70s, while along the coast, temperatures near 70 degrees are expected.
A Pacific storm brings windy and much cooler conditions Sunday. Satellite images show the thicker fog along the low lying areas of the San Joaquin and King Rivers. A ridge of high pressure will continue to dominate central CA today with above normal temperatures and dry conditions. The next weather system moving through central CA Sunday is a positive tilted upper trough moving onshore through north CA. The trough will move east into the Great Basin on Sunday night. Upper level winds near 90kts turn NW behind the trough Sunday evening.
430 AM CST Sat Feb 1 2020 WV imagery shows a deep upper trough moving through the MS Valley, courtesy of a highly-amplified ridge pushing east through the wrn CONUS. However, this will transition to zonal over the next 24 hours or so as troughs traverse Canada and tamp down the ridge as it moves east. Sunday will be even warmer as the next trough makes landfall on the west coast, transitioning zonal flow aloft over the region to SW. Leeside troughing on the Front Range will begin developing ahead of this feature, further veering sfc winds to the SW and resulting in an even warmer day than today. The trough is forecast to strengthen and dig down to UT by 00Z Tue.
Pleasant conditions are in store today as the main upper trough axis exits the region leading to clearer skies. Under clearing skies, temperatures should be able to rise into the lower 70s. Temperatures will be warmer Sunday mostly in the mid to upper 70s, while along the coast, temperatures near 70 degrees are expected.
Early afternoon temperatures were in the 30s but out in the high Plains downsloping winds were on display with readings there well into the 50s to lower 60s. Tonight: Mostly cloudy mid level deck due to warm air advection which should keep temperatures from falling much at all, in the lower to mid 30s. Sunday (Groundhog Day): Going optimistic with plenty of sunshine and warmer temperatures with a dry westerly downsloping winds. Low temperatures will range in the mid 20s across the northern half of the forecast area to around freezing over the south.
Clouds will clear out tomorrow in the wake of the upper trough currently producing these showers shifting east of the Appalachians. While the mixed layer will not be significantly deep, mixing up through that layer of stronger winds will produce some gusty winds across the area tomorrow afternoon and especially in the higher terrain. However the areal extent of such winds should remain confined to the higher peaks so will hold off on an advisory at this time and mention those wind gusts in the HWO instead.
Morning Update Skies have begun to clear across most of northeast Arkansas this morning in response to upper troughing continuing eastward. GOES-16 Satellite trends indicate a longwave trough moving through the Middle and Lower Mississippi Valleys early this morning. As of 4 AM CST, temperatures across the Mid-South have remained in the lower 40s across most locations due to the persistent overcast skies.
Upper level ridging is building into the area this afternoon, and a rather strong low level jet will nose into the area this evening. Light radar returns near the Twin Cities this afternoon are along the leading edge of the low level warm advection, and as that pushes into the area later this evening, there will be very brief window for a few snow showers.
1121 AM CST Sat Feb 1 2020 Dry weather conditions and much warmer air will prevail across the region for this weekend. Daytime highs will be even warmer on Sunday with near record highs possible as GEFS 850mb model temperatures show 2-3 positive normalized anomaly values.
1143 AM CST Sat Feb 1 2020 (Today and tonight) Dry and warmer today with highs in the 60s across much of the fa which is above average for this time of year.
Toned down wind speeds outside of the Wind Prone areas with a lee-side trough expected to remain nearly stationary through most of the day, and eventually pushing southeast this evening.
250 PM CST Sat Feb 1 2020 Upper northerly flow will give way to upper ridging by this evening. The upper ridge will move eastward through tomorrow while still having an impact on the region to help keep temps on the warm side tomorrow. An upper trough will begin to amplify across the West Coast tomorrow afternoon. A surface lee trough will develop ahead of the upper trough and provide breezy and elevated fire weather conditions.
A cold front will be sliding south across the area today.
as upper trough continues to eastward track. Trough axis expected to move off the Plateau early this afternoon but HR models show light showers developing really through the afternoon.
1017 AM PST Sat Feb 1 2020 The passage of a strong cold front on today will produce strong gusty winds across the Columbia Basin, Palouse, and West Plains, with occasional showers.
126 PM EST Sat Feb 1 2020 [Through 18Z Sunday] IFR cigs are expected to continue for another couple hours or so before the low-cloud deck gradually rises. An upper trough is still in AR and northeast TX and will sweep through the region today. Lingering low level moisture and weak lift ahead of the front may develop a few light showers, especially in the afternoon as the trough moves through.
Expect downsloping conditions this afternoon with weak westerly winds at the surface allowing for afternoon high temperatures to push into the 60s for much of the CWA, with the snowpacked areas a degree or two cooler. High clouds visible on satellite spilling over the aforementioned upper level ridge, but no other significant weather to be spoke of for the short term. Overnight lows with be more mild under the high cloud coverage dropping into the low to mid 30s with a near record breaking warm up for Sunday with the entire CWA pushing into the 70s with stronger downsloping winds out of the southwest to help aid it.
224 PM CST Sat Feb 1 2020 Cloud coverage continues to decrease as upper troughing shifts eastward. Upper ridging and high pressure will build into the region today leading to mostly dry and warm conditions through Sunday.
940 AM MST Sat Feb 1 2020 Current surface analysis shows warm front over the central Dakotas, with mild air in place across the area. Upper level analysis shows ridging across much of the western US, with a trough off the Pacific NW coast. High clouds are spilling over the ridge and across the area, helping to limit temperature rises so far. Western CONUS ridge continues to shift east, with very mild and breezy conds expected today before a strong cold front settles into the region Sunday. Cold front will quickly push through the region Sunday, with temps falling in the afternoon.
By midday, the trof's energy is shifting its axis east of the Tennessee valley, and some drier air starts to work in from the west. It may take awhile still, but eventually, rising heights from the building dome of high pressure over central CONUS will create a clearing sky and warming temps, mostly reflected in the Sunday forecast.
847 AM PST Sat Feb 1 2020 The passage of a strong cold front on today will produce strong gusty winds across the Columbia Basin, Palouse, and West Plains, with occasional showers.
146 PM EST Sat Feb 1 2020 A trough moving across the region will continue to bring light snow and drizzle to portions of the area this afternoon, tapering off from west to east. Highs tomorrow will be in the low to mid 50s for most locations with clearing skies by the afternoon.
246 PM EST Sat Feb 1 2020 Upper trof finally making its way east across Kentucky this afternoon, and while there is still plenty of cloud cover behind the trof the boundary layer is more mixy. Some weak radar returns noted along the trof axis, and with the shallow boundary layer, some light precip could still make it to the ground. Upper level ridging will settle over the eastern CONUS while a trough digs into the Intermountain West. Flow aloft will turn southwesterly between the trough and ridge, which will open the door for gulf moisture and warmth to be advected northward into the Ohio Valley.
The axis of the upper level trough will move east of the area this afternoon. As a result, a northwest upper flow will develop over the area resulting in increasing mid and upper level subsidence and high pressure building at the sfc. This will keep lows in the low to mid 40s inland to near 50 along the coast.
1107 AM EST Sat Feb 1 2020 Low pressure will move away from the region today with an upper level trough crossing the area in the afternoon and evening.
210 PM CST Sat Feb 1 2020 Upper trough and weak SFC boundary sitting across the Plateau will continue moving tonight and be well out of the picture early Sun. Mon night deep upper trough is situated over the western US, with southwest flow set up over the region. Upper jet will deepen this Southwest US trough. The area is looking at the possibility of heavy rain through that period, as the upper trough draws closer and affects of SFC boundary/SFC wave become more enhanced.
258 PM EST Sat Feb 1 2020 Another weak area of low pressure will pass by the area overnight and bring some light snow and perhaps a bit of drizzle.
1123 AM CST Sat Feb 1 2020 The temperature forecast today uses the warmer MAV guidance plus bias correction for highs in the 50s to near 70. Strong high pressure across Colorado will break down tonight and be replaced by low pressure across the cntl High plains Sunday. The cold air will back into Nebraska during the day Sunday cooling highs across nrn Nebraska first with the cooler air arriving across swrn Nebraska late Sunday afternoon. The temperature forecast Sunday leans on the cooler short term model blend but this might be too cool as the models show nearly full sun conditions and this could hold up the progress of the cold air. Arctic high pressure will build across Alaska and begin moving south tonight.
/issued 945 AM CST Sat Feb 1 2020/ Skies have begun to clear across most of northeast Arkansas this morning in response to upper troughing continuing eastward. GOES-16 Satellite trends indicate a longwave trough moving through the Middle and Lower Mississippi Valleys early this morning. As of 4 AM CST, temperatures across the Mid-South have remained in the lower 40s across most locations due to the persistent overcast skies.
212 PM CST Sat Feb 1 2020 As of mid afternoon, temperatures had climbed into the low to mid 30s across the entire FA. However, the higher 925/850mb winds are dropping by Sunday morning.
Southwesterly low level winds will bring much warmer temperatures to central Indiana by Sunday.
1122 AM EST Sat Feb 1 2020 The slow moving cold front is near Orlando early this morning and will move south across southern portions of east central Florid into late afternoon. Improving conditions expected behind a cold front from north to south into late afternoon with VFR conditions returning to MCO between 20Z-22Z. Then a period of strong NW winds will develop this evening and overnight as low pressure deepens along the mid Atlc coast.
1028 AM MST Sat Feb 1 2020 Current surface analysis shows warm front over the central Dakotas, with mild air in place across the area. Upper level analysis shows ridging across much of the western US, with a trough off the Pacific NW coast. High clouds are spilling over the ridge and across the area, helping to limit temperature rises so far. Western CONUS ridge continues to shift east, with very mild and breezy conds expected today before a strong cold front settles into the region Sunday. Cold front will quickly push through the region Sunday, with temps falling in the afternoon.
1203 PM EST Sat Feb 1 2020 Areas of light snow and drizzle are expected this afternoon as an upper level trough tracks through. Highs tomorrow will be in the low to mid 50s for most locations with clearing skies by the afternoon.
Afternoon highs expected to reach the low 70's across the region today. As this ridge moves into the eastern part of the state it begins to dampen, but keeps the region quiet, weather-wise.
The generally west flow persists tonight into Sunday with thermal ridging building toward the state. Cyclogenesis is expected to occur late Sunday into Sunday night across the front range near Cheyenne and Denver with a warm front extending eastward along the I70 corridor into Missouri.
1126 AM CST Sat Feb 1 2020 Today still looks like there will be a significant warm-up with upper level ridging and downsloping winds helping to also warm things up. I expect some isentropic lift occurring north of the front to the south, and could give us some light snow/flurries and even some freezing drizzle, considering dry mid-levels.
Mostly cloudy but mild conditions today ahead of an approaching cold front. Still timing the cold frontal passage for late tonight into Sunday morning. Cold front will bring MVFR-IFR snow showers and mountain obscuration.
Showers exit the waters by afternoon as a front slides across the state and high pressure begins to build in.
938 AM PST Sat Feb 1 2020 The passage of a strong cold front on today will produce strong gusty winds across the Columbia Basin, Palouse, and West Plains, with occasional showers.