Aikyam-Lab/Synoptic-Bench huggingface dataset:
405 AM CST Sat Nov 12 2016 Main forecast concern in the short term lies with widespread freezing temperatures tonight as chilly high pressure settles in over the forecast region. Will go with freeze advisory entire region for several hours of sub-freezing from midnight to around 8 or 9 AM Sunday. This high pressure system will continue to control the region for the remainder of the short term, and temperatures should moderate a bit each day.
Some of the coldest spots have managed to drop into the upper 20s, foreshadowing what is to come tonight, as dew points drop into the low to mid 20s this afternoon. This trough is only allowing for an increase in some high clouds across eastern Kentucky. Highs today will be several degrees cooler compared to yesterday, with readings generally peaking in the low to mid 50s. Ridges will be the only spots likely not seeing several hours of sub-freezing temperatures. A moisture starved trough of low pressure aloft is expected to push slowly across the eastern third of the CONUS through mid week, and will bring little more than scattered cloud cover to eastern Kentucky.
813 PM EDT Mon Oct 31 2016 High pressure will travel east of the Great Lakes region tonight allowing a warm front to push northeast into the area.
Scattered thunderstorms erupted nearer to the upper low center along the far northern California coast this afternoon, but all lightning strikes were confined to areas north of Point Arena. Dry and mild weather is then forecast for the remainder of the work week as an upper ridge builds over California. SFO Bridge Approach. A cold front will sweep southeastward over the coastal waters and bays late this afternoon and evening. High pressure will rapidly build back in over the area beginning Tuesday afternoon.
Believe the drier air coming and the decreasing winds/clouds, temperatures should drop a little cooler than what the current forecast has. Much cooler, more seasonable autumn air mass expected starting Tuesday and continuing through the remainder of the week.
921 PM EDT Mon Oct 31 2016 High pressure centered over the eastern Great Lakes will shift to the east coast overnight. A warm front will lift north across the region on Tuesday.
In the low levels of the atmosphere, a high pressure system will be located along the southeastern coast of the United States overnight. In the mid levels of the atmosphere, an area of high pressure will be centered over the northern Gulf of Mexico tonight. In the upper levels of the atmosphere, a ridge of high pressure will be located over the eastern Gulf of Mexico overnight.
Ceilings will slowly clear throughout the day tomorrow as high pressure regains control across the area.
/issued 256 PM CDT Mon Oct 31 2016/ Under sunny skies temps have warmed into the low to mid 80s this aftn.
709 PM CDT Mon Oct 31 2016 At h5 trough along the Pacific northwest coast with stronger wave moving through the Dakotas as seen in IR. There is a strong Hudson Bay low with a trough into the northeast CONUS. The lower elevations in the Platte River valley will fall to near freezing. Cooler air over western Nebraska on Tuesday with passage of cold front yesterday. Temperatures on the order of 10f to 15f degrees cooler.
Secondary low pressure moving east across the CWA this evening, with another batch of light rain showers moving through and keeping winds up over Fort Peck Lake. Cancelled the High Wind Warning at 6 pm without any reports in the Warning area. TFJ The stacked low pressure system responsible for this Halloween rain and wind is slow to get out of eastern Montana, but the main impacts are beginning to wane this afternoon.
1045 PM EDT Mon Oct 31 2016 A diffuse cold front over the northern Midlands will dissipate.
A weakening upper level trough is moving across Oregon this evening and tonight. An upper ridge will start building into the region Tuesday with gradual clearing by afternoon.
1148 PM CDT Mon Oct 31 2016 Early-afternoon water vapor imagery and 12z upper-air analysis revealed the presence of a west-southwest mid-level flow regime stretching from a vigorous trough just off the Oregon and California coasts into the northern and central Plains. In the low levels, a surface cyclone attendant to this mid-level disturbance was analyzed over central North Dakota as of 18z with a trailing cold front (presently masked by downslope warming) extending south into central Nebraska.
South winds turning to the west/northwest following the cold front will remain breezy through the evening but should gradually diminish towards morning. Main highlight will be above normal temperatures with highs in the 50s and 60s with lows above freezing. High confidence with building upper ridge into the weekend. although considering the strength of the upper ridge it may take a few days longer for the pattern to evolve than what models are suggesting. Will have to monitor obs to see if they will get back into KFAR, but for now will keep the lower ceilings out.
Expected arrival of renewed steeper/stronger swell during the high tide cycle Tuesday evening has led to an extension of the Coastal Flood Advisory.
940 PM EDT Mon Oct 31 2016 High pressure will build across the region through tonight.
734 PM EDT Mon Oct 31 2016 High pressure will move off the New England coast during the day Tuesday.
/ISSUED 353 PM CDT Mon Oct 31 2016/ The upper ridging that has dominated our weather for several days is beginning to shift east. The arrival of 60F+ dew points will coincide with the onset of the low ceilings.
Winds are shifting to the west and northwest behind the low pressure trough this afternoon. Cooler, but still unseasonably warm weather, is expected behind the low.
/Issued 812 PM CDT Mon Oct 31 2016/ A zonal flow pattern persists over much of the CONUS, to the north of ridging along the Gulf Coast. At the surface, lee side low pressure over Western Kansas and broad high pressure over the Eastern CONUS is yielding south winds and much above average warmth.
MSAS sfc pressure analysis had a low pressure trough in the Plains with the low itself centered in eastern North Dakota. The eastern periphery of the low stratus have actually been slowly eroding westward through the day. Also, analyzing forecast 925-850mb RH fields and moisture flux convergence, there will likely be an increase in low-level clouds through the afternoon into the evening along a developing warm front. For these reasons, nudged highs down toward CONSALL values, slightly cooler than SuperBlend.
So with that and our latest observations have lowered a few of the overnight lows in our more climatologically cooler areas. RH values will be in the low to mid 30s each afternoon, with light winds.
616 PM CDT Mon Oct 31 2016 Early-afternoon water vapor imagery and 12z upper-air analysis revealed the presence of a west-southwest mid-level flow regime stretching from a vigorous trough just off the Oregon and California coasts into the northern and central Plains. In the low levels, a surface cyclone attendant to this mid-level disturbance was analyzed over central North Dakota as of 18z with a trailing cold front (presently masked by downslope warming) extending south into central Nebraska.
1012 PM EDT Mon Oct 31 2016 A front that slipped south of the area last night, returns as a warm front tonight.
However, given the higher dewpoints tonight and not much expectation for clouds, it's likely not that simple. Remnant upper low seen on w/v imagery over s Tx will get absorbed in the sw flow aloft and move across cntl/ne Tx on Tue.
Strong Low pressure along the Minnesota/canada border region maintain a strong south wind regime tonight with high waves. Medium Pronounced WAA regime will continue into tonight with thermal ridge axis becoming established ahead of approaching frontal boundary.
The light showers are likely associated with pre-frontal warm air advection ahead of the main cold front. There has been a decent amount of lightning near the low and along the cold front since last night as well. One other item of note, freezing level lowers to 6-7k feet.
It's warm front was moving into the southwest corner of the forecast area. The cold front was into western Minnesota. This precipitation is caused by a low pressure area centered along the nd/mn border late this afternoon. The low will move northeast into southern Canada by early Tuesday morning. High pressure will build into the forecast area Tuesday morning causing breaks in the clouds from south to north during the day.
High pressure aloft will settle over the Great Basin midweek. The associated frontal band is expected to make it across northern Utah during the morning hours, weakening as it progresses east and loses the upper support as the trough begins to split. CIGs may lower below 7 kft as early as 12z with the approach of a weak cold front.
Otherwise, forecast remains on track as high pressure regains control and clouds clear tomorrow, resulting in abundant sunshine and another day of near record temperatures. Chattanooga Airport, TN 56 85 57 82 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 56 83 55 81 / 0 0 0 0 Oak Ridge, TN 56 83 55 81 / 0 0 0 0 Tri Cities Airport, TN 54 78 51 78 / 10 0 10 0.
758 PM EDT Mon Oct 31 2016 WSW flow aloft and 996mb low pressure over the Dakotas is resulting in broad strong warm air advection from the northern plains to the Upper Great Lakes. Winds should be decoupled just enough from the low-level wind max to lead to LLWS at KIWD this evening and at KCMX/KSAW thru the night. Per satellite imagery and obs, lower cigs are noted across MN/western WI ahead of the cold front associated with the low pres system. Strong low pressure moving from the northern Plains to north of Lake Superior tonight will result in gales to 40 knots over the east half of Lake Superior tonight. Once the low moves northeast of Lk Superior, west gales to 35 kts are expected Tue over Lake Superior, especially for the west half.
South winds turning to the west/northwest following the cold front will remain breezy through the evening but should gradually diminish towards morning. Main highlight will be above normal temperatures with highs in the 50s and 60s with lows above freezing. High confidence with building upper ridge into the weekend. although considering the strength of the upper ridge it may take a few days longer for the pattern to evolve than what models are suggesting. Will go with more of this higher end trend for now and let later shifts watch.
1154 PM EDT Mon Oct 31 2016 High pressure will move off the New England coast during the day Tuesday.
A warm front will bring a few showers after midnight. A weak cold front will pass through the area Tuesday afternoon with a small chance of morning showers.
805 PM EDT Mon Oct 31 2016 Very mild air will persist overnight into Tuesday as a warm front lifts through the region.
Areas of fog remain north of the highway 2 corridor, so did add that mention to the forecast until mid evening. South winds turning to the west/northwest following the cold front will remain breezy through the evening but should gradually diminish towards morning. Main highlight will be above normal temperatures with highs in the 50s and 60s with lows above freezing. High confidence with building upper ridge into the weekend. although considering the strength of the upper ridge it may take a few days longer for the pattern to evolve than what models are suggesting. Will have to monitor obs to see if they will get back into KFAR, but for now will keep the lower ceilings out.
A frontal boundary that moved off the mid Atlantic coast and caused the pressure gradient to ease locally will have stronger high pressure building in behind it. Reinforcing ridge north of the area will increase northeast to east winds back to 15-20 knots, especially south of the Volusia/Brevard County line late tonight/Tuesday.
822 PM EDT Mon Oct 31 2016 A diffuse cold front over the northern Midlands will dissipate.
746 PM EDT Mon Oct 31 2016 A front that slipped south of the area last night, returns as a warm front tonight.
Upper level low over Northern California will spread scattered light showers over the forecast area tonight and early Tuesday. Expecting a cold front to pass through the region between 06-18Z moving SW to NE.
/issued 813 PM CDT Mon Oct 31 2016/ An anomalously strong subtropical ridge will build over the SE CONUS over the next few days, keeping temperatures well above normal through midweek. Temperatures will fall into the 50s across most of the CWA, with the Memphis metro area likely remain in the lower 60s.
1123 PM CDT Mon Oct 31 2016 At h5 trough along the Pacific northwest coast with stronger wave moving through the Dakotas as seen in IR. There is a strong Hudson Bay low with a trough into the northeast CONUS. The lower elevations in the Platte River valley will fall to near freezing. Cooler air over western Nebraska on Tuesday with passage of cold front yesterday. Temperatures on the order of 10f to 15f degrees cooler.
An upper level low moving toward northern California will bring a slight chance of showers to the central coast tonight.
Despite precipitation and cool temperatures, it is expected that prevailing winds will curtail most fog activity so have removed most mentions except for in the higher southwest valleys.
611 PM MDT Mon Oct 31 2016 Have let the High Wind Warning expire across Custer, Fallon, and Carter counties at 6 pm as planned. Zonal flow across the area this tonight and Tuesday transitioning to ridging by Tuesday. Cooler day on Tuesday with downslope gradients still in place but less mixing will keep temperatures below 60 degrees. Mountains will see mountain shower activity especially during the afternoon as the flow turns a bit more cyclonic ahead of a ridge beginning to build into the Pacific Northwest.
732 PM EDT Mon Oct 31 2016 High pressure over the northeast will keep dry conditions in central New York and northeast Pennsylvania through Tuesday night.
Light snow showers will be possible over the higher terrain through the night with little accumulations expected. Zonal flow across the area this tonight and Tuesday transitioning to ridging by Tuesday. Cooler day on Tuesday with downslope gradients still in place but less mixing will keep temperatures below 60 degrees. Mountains will see mountain shower activity especially during the afternoon as the flow turns a bit more cyclonic ahead of a ridge beginning to build into the Pacific Northwest.
606 PM CDT Mon Oct 31 2016 Latest 19z surface analysis indicated low pressure over eastern North Dakota. Out ahead of the low pressure system.
759 PM EDT Mon Oct 31 2016 High pressure will move off the New England coast during the day Tuesday.
847 PM CDT Mon Oct 31 2016 Upper ridge is still in control of the TN valley and stlt shows that mid/high level moisture will continue to move across the TN valley overnight. Earlier forecasts were showing that temps could be a deg or two cooler than today but it doesn't look like that will be the case.
1145 PM CDT Mon Oct 31 2016 Latest 19z surface analysis indicated low pressure over eastern North Dakota. Out ahead of the low pressure system.
737 PM EDT Mon Oct 31 2016 High pressure building eastward across the North Country this afternoon and tonight will eventually scour out low clouds currently over the area for a mostly clear and cool night.
1221 AM EDT Tue Nov 1 2016 High pressure will build across the region through tonight.
738 PM EDT Mon Oct 31 2016 A front that slipped south of the area last night, returns as a warm front tonight.
813 PM CDT Mon Oct 31 2016 An anomalously strong subtropical ridge will build over the SE CONUS over the next few days, keeping temperatures well above normal through midweek. Temperatures will fall into the 50s across most of the CWA, with the Memphis metro area likely remain in the lower 60s.
812 PM CDT Mon Oct 31 2016 A zonal flow pattern persists over much of the CONUS, to the north of ridging along the Gulf Coast. At the surface, lee side low pressure over Western Kansas and broad high pressure over the Eastern CONUS is yielding south winds and much above average warmth.
818 PM EDT Mon Oct 31 2016 Stagnant pattern persists with a strong U/L ridge anchored over the Gulf of Mexico and Florida. Big pattern change late in the week as strong U/L ridging will develop over western North America with rex type block briefly taking shape. The strong ridging will induce sharp downstream troughing over the eastern U.
Temperatures were warmer and dewpoints mixed out further than yesterday, so fog formation may be delayed an hour or two from what occurred last night.
A cold front will push through the forecast area mainly between late tonight, with winds shifting northwest following frontal passage.
256 PM CST Wed Feb 8 2017 The cold front blew through North TX today with some gusty winds and cooler temperatures.
137 PM EST Wed Feb 8 2017 Cold air moving back into that state behind cold front that crossed the state today. Snow is expected late tonight into early Thursday morning with the highest accumulations likely in the Lower Susquehanna Valley.
Winds will increase out of the north this morning as a shallow cold front moves southward through the region. Winds will drop off to light and variable as high pressure moves in overnight. /Issued 324 AM CST Wed Feb 8 2017/ Shallow cold front is making its way through northeast Oklahoma at this time, and will move through the entire forecast area by early afternoon. The colder air will have a hard time making it through the higher terrain, so the far southeast part of the forecast area will see another mild day today.
The highest confidence exists with regard to wind chills tonight across the northeast zones. As a warm front pushes through the area tonight and into the day on Thursday the second concern becomes introduced. Model Bufkit soundings show that precipitation will begin as snow but begin to mix and change with sleet and freezing rain Thursday morning. There exists a possibility of patchy blowing snow as well with gusty winds in place before snow cover crusts over with the warmer temperatures and any liquid precipitation occurs.
1253 PM EST Wed Feb 8 2017 Cold air moving back into that state behind cold front that crossed the state today. Snow is expected late tonight into early Thursday morning with the highest accumulations likely in the Lower Susquehanna Valley.
345 PM EST Wed Feb 8 2017 For the rest of the afternoon, expect rain showers to increase over the area and continue through much of the evening hours courtesy of an upper level trough and cold front passing through the region. With temps above freezing before midnight and antecedent warm grounds, don't anticipate any impacts. Thu night looks dry with high pressure in place.
134 PM EST Wed Feb 8 2017 Intermittent periods of BKN/OVC MVFR ceilings will persist through most of thee afternoon, before an upper-level disturbance triggers showers and thunderstorms this evening through around midnight ahead of a cold front. The cold front should clear the area by 06z, resulting in a wind shift to the NW.
Broad upper level troughing continues across the eastern half of the country today. At the surface, a cold front remains north of the area with southwest flow maintaining a moist boundary layer across the area with high dewpoints for this time of year.
Snow showers will continue through Thursday before tapering down as high pressure pushes into the region.
1157 AM EST Wed Feb 8 2017 Scattered showers will end this morning as a cold front moves southeast of the region. Behind this, upslope snow will continue into Thursday afternoon, enhanced somewhat by passage of the mid level trough. Have issued a winter storm warning for the higher eastern Tucker and Garrett, closer to best moisture and where synoptic snow looks to hold on longest. Winter weather advisory has been issued for the remainder of the ridges and up to Indiana county. Outside of the ridges, lesser amounts should stay under advisory criteria, although Monongalia and Marion counties in will need to be monitored for headlines, as they will be closer to better lift and deep moisture.
339 PM CST Wed Feb 8 2017 (Tonight and Thursday) As of 2 PM, a NW-SE oriented pre-frontal trough/wind shift with modest cooling was south of I-20, making its way through the Concho Valley. Temperatures tonight will be quite a bit colder behind the front tonight for lows, dropping into the lower 30s north of I-20 to near 40 for the I-10 corridor. Cooler temperatures will continue for Thursday, although we will still be above normal in most areas.
Other concern will be mixed precipitation late tonight and Thursday moving across the region with a warm front from southwest to northeast. Arctic high pressure will move across Northeast Montana with dry and bitter cold weather. The high moves to the east tonight and an upper ridge moves into Western Montana. This will bring a warm front into Central Montana. That warm front along with the upper ridge moves east across the forecast area during the day on Thursday with significantly warmer temperatures. Rapidly warming temperatures aloft over a cold surface could bring a mix of light snow, sleet, freezing rain and/or light rain.
Through 18z the front moves little while to our northeast and east high pressure strengthens with colder air moving in. By 00z the stationary front remains to our west with high pressure starting to slide slowly east. Currently have highs in the low to mid 30s east and low to mid 50s west. For tonight warmer air aloft drifts into far eastern Colorado and with south to southwest winds around 10 mph produce mild lows in the mid to upper 20s. Across the east they'll still be under the influence of cold high pressure and light winds. warmer air aloft spreads from west to east across the forecast area producing afternoon temperatures ranging from the mid 40s to near 50 out east and mid/upper 60s out west.
241 PM CST Wed Feb 8 2017 Temperatures have warmed into the lower to middle 70s across much of the area this afternoon, some 15 to 20 degrees above normal for this time of year. The only factor limiting our high temperatures today will be a northerly wind shift later this afternoon, a precursor to an approaching backdoor cold front. The backdoor cold front is expected to make its way into the area later this afternoon and into the evening hours. No rain is expected with this cold front, with temperatures expected to fall into the 30s tonight.
500 PM EST Wed Feb 8 2017 Cold air moving back into that state behind cold front that crossed the state today. Snow is expected late tonight into early Thursday morning with the highest accumulations likely in the Lower Susquehanna Valley.
Plan to leave as is for now and add counties to bridge gap to the east to mainly focus on potential impacts with quick burst of snow around morning commute, then begin to trim this morning as exact track of second wave becomes certain.
Medium Chilly night shaping up for srn WI as cold low level thermal trough continues to become established.
A cold front remains to our north in central Wyoming and is readily apparent when looking at the difference in temperatures across the state. Broad ridging builds in Thursday though some snowshowers may persist for the far northern mountains. The upper level ridge over the area Thursday moves east with southwesterly flow on the backside kicking in Thursday night.
This area will need to be monitored this afternoon as cold front drops into the area. Chances for showers and a few thunderstorms will again impact all terminals today as a cold front moves through the region.
256 PM EST Wed Feb 8 2017 An upper-level trough continue to race east toward the Tennessee Valley and Southern Appalachian region this afternoon. As the cold front pushes east into the Plateau by 22-00z, a broken line/areas of convection is expected to develop across middle TN and move into the Plateau.