Aikyam-Lab/Synoptic-Bench huggingface dataset:
453 AM EST Sat Feb 3 2018 High pressure centered over NC and VA this morning will eject eastward this afternoon as low pressure moves from the upper Plains into the western Great Lakes. As the low moves eastward on Sunday it will push a cold front through the region with widespread rainfall.
/issued 902 PM CST Fri Feb 2 2018/ Skies are mostly clear this evening across the forecast area with temperatures ranging from the lower 20s to lower 30s. ranging from near 30F in the north to the low 40s in the far southeast. clouds will be on the increase later tonight along with warmer temperatures tomorrow. A few embedded elevated storms may also occur later in the night across the south as showalter indices drop to 0C in the trough axis. with a cold frontal passage lagging until afternoon. Freezing air will surge back in Sunday night with a few snow flurries possible north of I-40 in the 9pm to 3am time frame.
another short wave is moving over the top of the upper level ridge centered offshore. The airmass remains warm through the weekend with freezing levels at 7000-8000 feet.
343 AM CST Sat Feb 3 2018 A dry, breezy, and warm day is on tap today as an upper trough moves from the central Rockies southeast across the southern high plains this afternoon. We continue to side towards warmer temperatures on the Caprock and lower dewpoints, along with slightly stronger MOS guidance winds. A weak cold front will slip southward later this afternoon and early evening but only a weak gradient - surface winds should weaken fairly quickly this evening though around 10-15 mph northerly breezes may briefly follow the front.
When the winds mix down it should erode the lower cloud deck, otherwise there will be some low clouds and stratus producing IFR ceilings and visibilities overnight into the morning.
219 AM CST Sat Feb 3 2018 The upper air pattern will not change much through this forecast as a ridge holds just off of the west coast of the U.
There is still a threat of light freezing rain in Slope/Bowman/Adams counties early this morning, so will keep the winter weather advisory alive in these counties, and cancel the remaining three surrounding counties, Golden Valley, Billings, and Stark counties. Latest water vapor imagery shows a dominant Hudson Bay Low in combination with ridging in the Pacific northwest and a closed upper high over eastern Russia, all producing a strong/active northwest flow into North Dakota. The Hudson Bay upper low remains stationary and remains as the dominant steering force into North Dakota.
1247 AM EST Sat Feb 3 2018 High pressure will build across the region offering dry conditions into Saturday. A cold front will cross the region later Sunday, changing the bulk of the rain and snow over to snow. Warmer air will be filtered into the region on southerly winds that will increase to 10-15 mph during the day Saturday. Snow will begin Saturday night, mixing with rain during the day south of I-70, and then changing back to snow after the cold front passes in the afternoon. The upper level trough helping to force the bulk of this precipitation will will cross Sunday evening and begin the drying process that will eventually turn off any accumulating snowfall. Overnight lows Saturday night will not drop significantly, generally bottoming out around freezing in most locations.
High pressure aloft along the west coast will maintain a somewhat moist northwest flow across the Great Basin the next several days. High pressure remains in place off the West Coast, keeping Utah under a northwesterly flow aloft. In addition, dewpoints even in the Cache Valley remain above freezing at this time. Otherwise, expect some gusty winds over the higher terrain of northern Utah and across portions of southwest Wyoming.
Winds will continue to diminish overnight tonight as high pressure moves over Middle Tennessee. Lows will reach into the low to upper teens by Saturday morning, but we'll warm well above freezing by Saturday afternoon. As the center of high pressure moves east of the Mid-State Saturday, surface winds will become southerly.
At the surface, a weak area of low pressure will develop southwest of the state and will move east. Cold air will linger to the north in the wake of a cold front set to move through on Sunday. Cold air will begin to spill into the area as high pressure builds in after rainfall exits to the southeast.
312 AM EST Sat Feb 3 2018 High pressure will move off the east coast today. Low pressure will approach from the west tonight and Sunday and track across the area Sunday night.
Latest surface analysis places the approaching cold front across central Florida just north of the Lake Okeechobee region. High temperatures today were in the mid to upper 70s with a few areas reaching into the low 80s today. Mostly sunny skies have turned to partly cloudy skies ahead of a cold front. Latest surface analysis has the cold front draped across northern/central Florida working its way down the peninsula. This cold front will not be like the past few we have seen reach South Florida.
/issued 230 PM CST Fri Feb 2 2018/ Ahead of a shallow trough arriving in NW flow tomorrow afternoon, southerly winds will slowly moisten overnight but should fall short of generating low clouds or advection fog. Behind the upper trough Saturday evening, a modest cold front should wander south before stalling and decaying over the region on Sunday.
Saturday will start off warm, with morning low temperatures much warmer than previous nights. Warmed the previous forecast by about 5 degrees given a slightly slower cold front progression. During the afternoon a cold front will shift winds to northerly, gusting 20-30 mph. During the evening and early overnight, continued cold advection brings temperatures in the low levels of the atmosphere down to negative 12 to negative 20 C, which is the dendritic growth zone.
A cold front will move across Oklahoma and northern Texas on Sunday.
308 AM CST Sat Feb 3 2018 Southerly winds have returned to the region, resulting in warmer overnight temperatures and an overall increase in low level moisture. A cold front is on track to pass through the region tonight.
As this low moves southeastward it will cause winds to shift out of the northwest. Winds should quickly return out of a southerly direction by morning Sunday before a backdoor cold front slides into the Panhandles.
High pressure will move over the region this evening on its way to the Mid Atlantic coast Saturday afternoon. The return flow on the back side should bring us warmer temperatures in the afternoon, after another cold start in the teens Saturday morning. Southerly winds that night will keep us from cooling down too much and forecast soundings hover around the freezing mark through a fairly deep layer. The surface cold front, actually associated with a northern stream system that lags behind our morning precip maker, should pass through the region Sunday afternoon.
436 AM EST Sat Feb 3 2018 High pressure will build off to the east offering dry weather and a warming trend today. A cold front will cross the region later Sunday, changing the rain and snow over to snow.
339 AM CST Sat Feb 3 2018 Light snow is beginning to spread into the western CWA within region of broad lift out ahead of the low pressure system located over western SD. Soundings do still support some brief freezing rain or sleet so will leave mention of this in the forecast. It still appears snow accums will be light/minimal over much of the CWA, with the highest amounts around an inch or slightly more across the far northeast CWA. Arctic high pressure wil build in at the sfc on Sunday. Coupled with an upper trough that lingers over the region through mid week this combination will result in temperatures at or below average through the period. A few weak low pressure systems will clip through the region.
Water vapor imagery shows a short wave trough moving onshore into the Pacific Northwest today. Ahead of this wave, a lee side trough was deepening along the eastern slopes of the Rockies. Southerly winds, along with some increasing high level cloudiness, should keep low temperatures in the range of the warmer MAV guidance. A much warmer day is in store as west to northwest downslope winds result in high temperatures in the upper 50s/near 60 over central Kansas, ranging upward to the upper 60s over far southwest Kansas. A strong cold front will accompany this wave and will backdoor across western Kansas during the day. Thermal profiles suggest that the main precipitation types will be freezing drizzle or light snow in the mid layers are able to moisten up enough.
128 AM EST Sat Feb 3 2018 High pressure will build into the state overnight and Saturday. Developing low pressure over the plains this weekend will push through Pennsylvania on Sunday.
There is still a threat of light freezing rain in Slope/Bowman/Adams counties early this morning, so will keep the winter weather advisory alive in these counties, and cancel the remaining four surrounding counties, Golden Valley, Billings, Stark, and Hettinger counties. Latest water vapor imagery shows a dominant Hudson Bay Low in combination with ridging in the Pacific northwest and a closed upper high over eastern Russia, all producing a strong/active northwest flow into North Dakota. The Hudson Bay upper low remains stationary and remains as the dominant steering force into North Dakota.
A broad mid-level trough stretched across the eastern CONUS resulted in northwesterly flow aloft over the central U. At the surface, the region was wedged between high pressure over the southeastern U. and low pressure over the Rockies. This warming trend will continue into Saturday as a tight pressure gradient remains in place with low pressure advancing further eastward across KS. Saturday into Saturday night, which will push a surface cold front southeastward across the CWA Saturday night. There will still be plenty of dry air to overcome in the low-levels, so do not expect any precipitation along the front.
1251 AM EST Sat Feb 3 2018 Warmer and dry today. South- southwest winds in the lower levels will promote warm air advection throughout the day, allowing for a moderation in temperatures. with SLRs around 10 or lower given forecast upper air profiles and daytime max temperatures forecast to be above freezing. Any rain/mix will rapidly change back to snow late Sunday afternoon and evening as strong cold air advection will ensue with the passage of cold front.
Southern stream upper trough and vort max energy to move from the N Gulf tonight to the FL/GA line late Sunday. Weak N Gulf Coast storm system to develop and organize late tonight and move through the Deep South Sunday with attendant cold front sweeping through the Big Bend area by Sunday afternoon.
Concurrently, a cold front will be moving in from the west as an upper level trough moves into the Mid- Mississippi River Valley. Precipitation falling into the dry air in the low levels will cool the column and this will allow for a wintry mix of precipitation. Southern Valley and Plateau - All Rain Central Valley - Some Snow/Sleet at Onset but Mostly Rain Northern Valley and Plateau - Starts as Snow/Sleet mix around 1-3 am, transitions to freezing rain around 4- 6 am and all rain by 7 am. Southwest Virginia, Southwest North Carolina and East Tennessee Mountains - Starts as snow around 1 -3 am transitions to freezing rain near daybreak and all rain by 10 am. The cold front will move through the forecast area on Sunday with rain chances decreasing from west to east.
Portions of NE WY/the SD Plains could also see light rain or freezing rain, but appreciable accumulations are not expected. Upper ridging remain just off the Pacific Coast with deep northwest flow across the northern Plains. Models are indicating some precip may switch over to freezing rain across northwest SD as 850 mb temps of 0 to +3C push in late tonight with sub-freezing surface temps persisting.
However, a 12-15 kft cloud deck over northeast Oklahoma and northern Arkansas has kept temperatures a few degrees warmer than surrounding cloud-free locations this evening, and may allow low temperatures being several degrees warmer than forecast if clouds stick around all night.
356 AM CST Sat Feb 3 2018 High pressure dominates the eastern half of the CONUS this morning as a few weak waves move through the Midwest in predominantly northwesterly flow. With the high pressure ridge sliding to the east, southerly flow has picked up and will continue to increase into the morning. The warmer airmass moving into the region will pull the high temperatures up into the upper 30s/40s this afternoon.
Southerly winds tonight ahead of the next weather system will help keep temps much warmer than last night with lows in the 20s. An area of low pressure moves through South Dakota during the day Saturday, with the next sharp cold front beginning to edge into northeast NE Saturday afternoon. Models are generally pretty dry along the front Saturday, but the Highres NMM suggests there could be some spotty light drizzle, but changing to light snow as the colder air moves in.
1049 PM CST Fri Feb 2 2018 Stratus clouds continue to expand north and east across the area this afternoon ahead of an approaching warm front. Saturday the inverted trough noses into Iowa and southern Wisconsin.
May see some moistening of the lower levels by morning, with scattered low clouds briefly for the same areas. Overnight lows will be above seasonal normals, in the low to mid 40s.
416 AM EST Sat Feb 3 2018 Warmer and dry today. South- southwest winds in the lower levels will promote warm air advection throughout the day, allowing for a moderation in temperatures. with SLRs around 10 or lower given forecast upper air profiles and daytime max temperatures forecast to be above freezing. Any rain/mix will rapidly change back to snow late Sunday afternoon and evening as strong cold air advection will ensue with the passage of cold front.
A cold front was dropping through southeast Montana. An upper ridge will exist off the West Coast as an upper jet max crests the ridge and extends southeast across Montana and Wyoming into northern Colorado by late this afternoon. A cold front will drop southeast, where areas near highway 2 will only reach the lower 40s, upper 40s to near 50 expected near and south of highway 2. For tonight, an upper trough will drop through the Northern Plains into Nebraska, as the upper jet max drops into the region. The highest snowfall amounts near 2 inches northern Sheridan and northwest Cherry county with near 1 inch possible southeast through the North Platte, Broken Bow and Burwell areas.
high pressure has allowed temps to warm significantly over the eastern mountains and plains, and temps in the 60s have reappeared in the usual warm locations along the srn I-25 corridor. Elsewhere, wave passage will maintain breezy w-nw winds over the region overnight, keeping mins on the mild side, especially over the higher terrain and eastern slopes. On Saturday, temps aloft cool slightly across the region, though with deeper mixing and downslope winds, max temps will end up a few degf warmer than Fri at many locations, especially along and east of I-25.
It could be cooler, in the mid to upper 40s, over the snowpack in central to northeast Nebraska. A second quick wave will help to usher in cooler air tonight. Precipitation will mainly fall as snow outside of a possible quick transition as the cooler air settles into the region.
This is due to the center of cool high pressure over central Florida early this morning, which will shift south and east during the day and cause a moderating low level south/southwest wind flow. High pressure ridge over the area will produce good boating conditions. Return flow around departing high pressure over the Atlc will veer winds out of the south to southwest. Long duration of very low humidity expected again today as very dry air remains in the low and mid levels.
A closed low over the southern plains and an associated weak front will generate showers and thunderstorms to the west today. Thus, slight chance of thunder was maintained during the day Saturday with the highest PoPs generally transitioning eastward through midday into the afternoon. Highs both Friday and Saturday will be primarily in the low-to-mid 70s. High pressure will build in for the middle to late part of the week. All the action should occur during the first half of the forecast period, with a warm front and then a cold front producing the unsettled weather.
Isolated thunderstorms remain possible this afternoon along the passing cold front but widespread severe weather chances look unlikely as upper cap looks fairly stout. expect upper level ridging to return over the state.
With the cyclone approaching, this boundary will remain to our north, keeping the majority of the Mid-South within the warm sector through tonight. A very weak cold front (main effect will be drier air) will move across the Mid-South late tonight into early Saturday, shunting rain chances off to the south and east.
1030 AM EDT Fri Mar 16 2018 A dry cold front near the south coast will move to the south today and become stationary. Weak low pressure will move through late Saturday, pulling the front back north as a warm front.
An area of high pressure will be over the Northland today into Saturday keeping the region dry under mostly clear skies. Today will be sunny as a ridge over the Northland keeps the affects of a storm system well to the south/west over the Central/Northern Plains. Highs today will be warmer than yesterday and range from the mid thirties to lower forties. A light onshore flow will keep lakeside areas a bit cooler.
1032 AM EDT Fri Mar 16 2018 A cold front approaching from the north will stall near the north part of the forecast area tonight.
726 AM EDT Fri Mar 16 2018 VFR will prevail through period at all terminals as high pressure overhead will lead to mostly clear skies and light winds.
The Winter Storm Warning (WSWMFR) for the higher terrain of Siskiyou County, and Winter Weather Advisory for much of the remainder of Northern California, South Central Oregon, and southern Josephine County remains in effect through 8 AM PDT. A cold upper level low is centered offshore of Curry County and will slowly move east to southeast today. The trough will make its way across our area late today into Saturday morning with the highest probability of lingering snow showers over the Cascades. Another disturbance now over eastern British Columbia will rotate counter-clockwise around the trough and form a closed low offshore of Washington and Northern Oregon.
Will keep headlines as is for now but short range forecast soundings keep surface temperatures at or above freezing for most of the northeast Nebraska area for much of the day allowing for intermittent periods of freezing rain and rain.
An upper low over Kansas and Nebraska today will move into Iowa and Missouri tonight, with nothing to show for our area except some cirrus clouds in our south today and some mid level clouds in the southwest later tonight. Tonight will be much the same as it has been the past few nights with weak high pressure continuing over the area. 12Z Sat - 12Z Mon Upper level ridge over the forecast area on Sat will breakdown through Mon morning. Short waves will rotate around an upper level trough over the western US. Upper trough will move out into the central and southern Plains by Mon morning. Northern portion of the trough will rotate over southern ALTA and southern SASK. Mon - Thu Long wave trough remains over the West Coast and the northeast US and de-amplifies through the period.
A low pressure system will move from the Mississippi Valley to the Ohio Valley on Saturday. Areas near and north of Interstate 74 will see a wintry mix with mainly freezing rain.
/issued 345 AM CDT Fri Mar 16 2018/ Upper trough crosses Rockies today becomes a closed low early as the next low reaches the CA/OR coast.
An upper level low pressure system will continue to be over the region and centered over southern Oregon. This low will continue to spread moisture northward across the forecast area producing scattered to numerous showers at times for most of the forecast area. Temperatures will continue to be cool today due to cloud cover and the cooler air aloft mixing down due to the shower activity.
Low pressure moving across the central plains today will tap the relatively warm, moist gulf air that has begun streaming inland across the gulf coast over the last 12 hours to initiate scattered to numerous showers and thunderstorms. The highest overall coverage and intensity of the convection will be from mid morning through early afternoon during which a few strong to severe storms may develop.
Upper level trough will continue to move to the south today bringing rain and snow showers to the area through this evening.
A low pressure system was pushing into Western Kansas early this morning. From the low. A cold front was positioned to the west into Eastern Colorado. Latest model solutions continue to indicate this boundary making it into parts of Northwest Arkansas this afternoon as the low in Kansas makes its way across the Central Plans. gusty southwesterly winds 20-35 mph and warmer temperatures are forecast. The associated cold front to the low pressure system is progged to move into Northeast Oklahoma this evening and push through the CWA overnight tonight. Cooler temperatures and continued northerly winds 5-10 mph are forecast for Saturday behind the cold front.
The east coast trough will continue to lift northeast leaving our region under zonal upper-level flow with weak impulses passing harmlessly north of our area through Saturday. It will be warmer today, with high in the middle to upper 70s away from the beaches. Clear skies, dry air, and light winds will allow temperatures to drop quickly again after sunset, but low temperatures will be about 10 degrees or so warmer than last night, settling in the 40s north and 50s south. Temperatures will soar into the lower 80s away from the coast.
849 AM EDT Fri Mar 16 2018 Dry and stable conditions courtesy of high pressure over the region will support pleasant dry weather with ample sunshine and light winds across the entire forecast area the remainder of today. After a very cool start (temps in the 30s and 40s) temperatures will rebound quickly with highs topping out in the lower to mid 70s over inland areas during the afternoon, but upper 60s to around 70 along the coast due to an afternoon sea breeze.
expect upper level ridging to return over the state.
High pressure centered over far southwestern Ontario is nosing south into the Great Lakes early this morning, with north to northeast winds at the surface. Surface winds will become more easterly with time today as low pressure strengthens across the Plains. A considerable gradient in temperatures is expected from west to east today, with locations closer to Lake Michigan remaining in the low to mid 30s. Further west toward Madison, expect to see highs top out in the low 40s.
Snow fall totals might be a bit less with this storm through the lower elevations of the Missouri River Valley along and upstream of Fort Peck Lake. The going advisory still holds well generally for snow amounts and the expected freezing rain and snow and rain mix. Temperatures at the surface are around or even a little above freezing depending on location. Otherwise, freezing rain and snow are expected at times through the day, with steadiest precipitation rates late this morning into this afternoon for the southeast zones, and this evening for the northwest zones. This, combined with a trace to a few hundredths of an inch of icing potential in freezing rain, is reason enough to maintain the headlines in place. Tonight, as main precipitation lifts north, looking at the potential for lingering freezing drizzle.
1128 AM EDT Fri Mar 16 2018 Periodic snow showers and cold temperature are expected into the afternoon amid upper-level low pressure. Wintry precipitation could clip northern West Virginia and the ridges Saturday.