Aikyam-Lab/Synoptic-Bench huggingface dataset:
221 AM EST Mon Jan 29 2018 A cold front will continue to move across the region early this morning bringing much colder air.
Light N-ly winds are expected to continue tonight but increase Monday due to a surge of high pressure.
This evening, a cold front will push through the area, which will increase winds and gusts and bring a return of cigs around the VFR/MVFR margins.
In addition, another cold front extended from Ohio Valley to Arkansas to West Texas. Upper air analysis showed a trough axis from the Great Lakes region to north central Gulf with an embedded disturbance over Missouri. The main upper level trough axis will continue to push east and northwest aloft and surface will drive the remaining moisture well south to southern and southeast gulf today and tonight.
The last remnants of the lower clouds are dissipating quickly across northwest and west central Minnesota.
318 AM EST Mon Jan 29 2018 Fair weather will continue through Monday under the influence of a weak ridge of high pressure.
324 AM CST Mon Jan 29 2018 Cold front currently moving into far southeast Oklahoma/west-central Arkansas early this morning. Brisk north winds behind the front have dropped wind chill indices into the lower to mid teens across much of northeast Oklahoma.
304 AM CST Mon Jan 29 2018 Early this morning the cold front has made its way into far southern Missouri and will be south of the area in the next few hours. The winds will diminish this afternoon as high pressure begins to work its way into the region from the west.
High pressure gradually weakens thereafter allowing temperatures to cool slightly beyond the middle of the week, although still remaining above average. A strong upper level ridge continues to blanket the western states today, yielding lots of sun and very warm temperatures. During the next 24 hours, the ridge axis will be tipping eastward, which will precipitate an increase in the surface pressure gradient across southern Arizona.
29/06Z TAF CYCLE A cold front will move through the state through Monday morning. Today Through Tuesday No significant weather is expected through the period with a dry cold front crossing during the first half of Monday. Surface ridging will build in thereafter, with the ridge axis moving overhead by Tuesday.
A cold front is located in North Texas and this front will be pushing through the CWA later this morning. Behind it, dewpoints will be in the 20s and 30s with the lower values across the western half of the area.
With the center of the high well to our east on Monday, lower tropospheric winds will take on a greater southerly or southwest trajectory which will allow for warmer high temperatures. We foresee highs in the upper 20s over our far east, but lower to mid 40s are possible over the higher terrain of southwest Nebraska. After lows mainly in the 20s, highs should climb into the lower to mid 50s for most locations Tuesday afternoon. The warm up is short-lived as the models project a cold front Tuesday evening.
236 AM MST Mon Jan 29 2018 CURRENT FORECAST: Synoptic Setup: forecast begins with center of an arctic airmass over northern Baffin Island and large trough extending south through Ontario the Great lakes and the Mississippi Valley and second trough pushes southwest into the Yukon Territory and the Gulf of Alaska where arctic air give way to a pacific airmass. In between these two large troughs is a ridge over California running north into southern British Columbia. Today through Tuesday: Ridge to the west will be progressive and move through eastern Montana reaching peak Tuesday before exiting. During this time expect rising temperatures with above freezing conditions for Tuesday itself.
Today Through Tuesday Night Cold front was located acrs NW AR early this mrng. Elsewhere, highs wl be in the 40s and 50s, about 5 to 10 degree cooler than on Sun. The high wl shift E of AR on Tue, with S/SE wind flow returning.
An upper ridge axis moves into western Colorado by 00Z Monday late. For temperatures readings look 2-4 C warmer on Monday compared to today's. Warm temperatures will continue on Tuesday as strong ridging remains in place over the western United States. With the ridge axis translating across Colorado Monday night and Tuesday, the warmest airmass of the week will be in place. It will also be dry across the forecast area due to the subsidence under the ridge.
Northerly winds in the lower levels backed to the northwest and then west in the mid levels. Upper trough axis should pass through the area early this evening with clouds clearing by mid to late evening. Cold air slowly moderates while high pressure moves east.
850mb temps will decrease from around -16C now to around -20C by 00Z Tue, but high pressure will be moving in from the W at the same time. Overall, lake effect snow will push offshore on Tuesday and be replaced with a warming trend out ahead of an approaching cold front from the west.
1016 PM MST Sun Jan 28 2018 Latest analysis shows the upper trough that brought light snow to parts of the area today is shifting off to the east and the western CONUS ridge builds eastward. Flurries will remain possible over parts of western and central SD into the early evening but then synoptic scale subsidence associated with the upper trough building in from the west should bring an end to any precipitation for the rest of the night. The upper ridge to the west will continue to move eastward early this week, bringing warmer temperatures to the forecast area especially by Tuesday, when highs are expected to push into the upper 40s to near 60.
228 AM MST Mon Jan 29 2018 High pressure aloft will bring seasonably mild dry weather under mostly sunny skies this week with temperatures remaining around 5 degrees above normal most of the period. For today and Tuesday flat ridge will extend west to east across the CWA over low level easterly flow.
1105 PM CST Sun Jan 28 2018 A cold front will shift into the Ozarks from the north late this afternoon and this evening.
310 AM CST Mon Jan 29 2018 A fairly weak cold front is moving through the region tonight, shifting winds to the NE. Temperatures will be a few degrees cooler (particularly for areas north of I-10) today but expect another beautiful day regardless.
255 AM CST Mon Jan 29 2018 Early this morning the region was under northwesterly flow aloft as the mid-level trough was stretched across the eastern CONUS. At the surface, high pressure was surging southward into the Central Plains with the northerly winds supporting the advection of cold Canadian air into the region. As a result, this approaching low pressure will cause winds overnight to shift around to the south. This shift to southerly winds will keep overnight temperatures a bit warmer than this morning with lows in the upper teens to low 20s.
336 AM CST Mon Jan 29 2018 H5 analysis this morning had a trough of low pressure extending from the upper Mississippi valley south into the Ozarks. High pressure was present over California with a ridge extending north into British Columbia. This was in the vicinity of an elevated warm front which extended across the western third of the forecast area. The before mentioned elevated warm front, will track slowly east today across the western 2/3rds of the forecast area. The warm front will track east, approaching the Missouri river by 12z Tuesday. Ridging aloft will persist along the west coast the next several days, with northwest flow aloft across our region on the eastern periphery of the ridge.
235 AM EST Mon Jan 29 2018 Low pressure near the coast will move northeastward and farther away from the forecast area today, and rain will taper off from west to east.
The gusty east wind combined with low RH values and high fire danger will produce critical fire conditions for the lower deserts.
238 AM CST Mon Jan 29 2018 Low stratus clouds blanket much of the area early this morning, with a pocket of clearing along and north of the Highway 20 corridor in Iowa. Seasonably cold and relatively benign weather is expected next 24 hours as Canadian high pressure builds southward into the middle and upper Mississippi River Valley Region. Highs this afternoon will range from the mid 20s NW of a line from Cedar Rapids to Freeport to the lower 30s in the Burlington, Keokuk, and Macomb areas. Tonight, the ridge of high pressure will be directly overhead, with clear, calm, and cold conditions expected overnight.
The cold front has already moved through most of the terminals with the exception of SPS, but that will change around 06-07Z.
The cold front that moved through last night is parked to the south of the area with a trailing stationary boundary draped back into the central and northern Rockies. Therefore, high temps have been having a hard time reaching the low to mid 30s along the KS/NE border while upper 40s have been more common over east central KS. High temps should be on the colder side of guidance with low 30s being the common reading as a cooler airmass remains in place with surface ridging from the north. A good warmup is expected on Tuesday as thermal ridge extends from southwest to northeast across Kansas and into Iowa.
The recent snowfall will also allow for cooler temperatures tonight. A weak area of low pressure over southwest SD is producing light snow west of the CWA. High pressure building into the region from the north will bring cold temperatures tonight with lows in the single digits on either of zero. The cold high pressure will keep temps in western MN from climbing very much. A weak cold front will push through the region on Tuesday.
1041 PM CST Sun Jan 28 2018 High pressure over the region will keep skies clear at all area airports through this TAF period. In the upper levels, Deep north and northwest flow over TX is associated with an upper trof over the upper midwest. This trof will move east toward the east coast keeping us in the extended downsloping and dry NW upper-level flow for the first part of the work week. At the surface, high pressure will continue to build down into the state giving us continued cool conditions and low humidities.
200 AM CST Mon Jan 29 2018 Energy within the base of a mid level trof that extended from Great Lakes to the Mississippi Valley region, will move east today. Quiet weather tonight through Tuesday night as high pressure moves across the area. It will be cooler as well.
an approaching cold front from the west-northwest will veer winds to a more southerly flow and then southwest across the area. The front and its parent mid level trough will also bring widespread showers and potential for a few thunderstorms starting later tonight and continuing into Monday. A drier and cooler airmass should begin filtering from the north in the wake of the FROPA Monday late in the afternoon and continuing through Tuesday.
/issued 853 PM CST Sun Jan 28 2018/ A reinforcing cold front is beginning to push into Northeast Arkansas, the Missouri Bootheel, and Northwest Tennessee. Temperatures will drop into the lower to mid 30s for nows. A cold front was located from northeast Ohio through southern Missouri and into western Nebraska. Temperatures will be cooler tonight but seasonal with lows Monday morning in the low to mid 30s. High pressure will build into the central U.
Cold front will move through our region today, bringing some gusty nwly winds. Wind speeds will gradually decrease as the pressure gradient relaxes this aftn, and high pressure builds in over the region.
Today, a mid to upper level trough axis will be crossing the area, with dry air advection eroding morning clouds and leaving mostly to partly sunny skies. A secondary 500 mb vort max on the back side of the trough along with a cold front will move into the area late in the day. A 20-25 kts upslope 850 mb flow will enhance QPF in the higher elevations of SW VA and East TN, with snow accumulations still expected to be in the 1-3 inch range across the mountains.
839 PM PST Sun Jan 28 2018 High pressure aloft and offshore flow will keep the weather unseasonably warm and dry through Monday.
1126 PM CST Sun Jan 28 2018 Strong cold air advection associated with a passing cold front has been observed across the local area today. the low clouds are expected to clear this evening with mainly passing thin cirrus expected overnight. expect temperatures to warm up to near freezing by early afternoon as todays cold front eventually begins lifting northeast late in the day. A relatively nice start to the extended periods is expected across the local area as an upper level ridge passes across the plains on Tuesday and mostly sunny skies prevail. An approaching cold front will then approach the local area behind this ridge.
1112 PM PST Sun Jan 28 2018 Stratus and freezing fog are rolling into the southern half of Lake Tahoe this evening as seen on area webcams.
329 AM CST Mon Jan 29 2018 Today through Tonight: Latest rap and satellite imagery showed a mid to upper level trough over the Mississippi Valley region. With a tight pressure gradient and high pressure building in expect breezy conditions for today with gusty winds of up to 25 mph in the delta region and 15 to 20 mph elsewhere as a dry cold front tracks across the region for today. Winds will taper off as the pressure gradient relaxes from the northwest overnight as the upper trough tracks to the east. Highs today will be from the lower 50s north to the lower 60s south. It will be cooler tonight with a freeze with lows from the middle 20s to the lower 30s.
116 AM EST Mon Jan 29 2018 A cold front will continue to move across the region early this morning bringing much colder air.
100 PM EST Tue Jan 23 2018 A cold front will exit central NC early this afternoon.
Clouds are continuing to push into the area this morning as an upper level low centered over the Great Lakes region lifts northeast. Clouds associated with an upper level low will continue to impact all terminals during the taf period.
Remaining on the chilly side Wednesday with a strong area of high pressure building down from the north. High pressure is moving east Wednesday night with a warm front trying to lift moisture in the Upper Great Lakes, behind the high.
Only variation seems to be the slight increase in temperatures expected due to the coming upper level ridge through mid-week, followed by colder temperatures into the weekend due to the next upper level trough from the northern Rockies. Evidently the slow movement of the overall pattern allows the higher elevations of the Rocky Mountains to wring out all of the precipitation, leaving us here out on the northern high plains with no leftovers.
Tonight low level moisture profiles will thicken enough to support a very light rain/snow mix or even light snow/flurries as temps fall below freezing. Upper low over western Illinois will make its way ENE into the Great Lakes today. Seasonably chilly and somewhat raw conditions will continue into Wednesday, as another upper wave swings through the Ohio Valley and the low-level thermal trof takes its time lifting out.
911 AM MST Tue Jan 23 2018 Sent an update this morning to represent the wide range of low temperatures this morning and to capture the freezing fog in the valley locations. BMickelson Previous discussion: Upper trof moving across the region this morning with clearing skies. Still a little potential for freezing fog in the valleys but not much sign of it yet. Otherwise dry and warming conditions expected over the next few days as an upper ridge builds across the Rockies.
302 PM CST Tue Jan 23 2018 Temperatures will remain the primary concern in this forecast period along with potential for fog as warmer air returns to the region. A higher layer of clouds over central and eastern Nebraska was overtaking the low cloud layer. This higher layer was in association with a mid level trough moving across the central plains this afternoon. Warmer readings in the mid to upper 30s were just upstream of the area along with less cloud cover.
Clouds are continuing to push into the area this morning as an upper level low centered over the Great Lakes region lifts northeast. Cloud cover looks to move over the region on the backside of the upper trough today, bringing low VFR/high MVFR cigs through the day.
Ridge building over the area will keep most of the area dry with warmer temperatures on tap. Lee side troffing will increase foothills winds tonight with strong wind gusts expected from Livingston to Nye by late tonight.
Low temperatures will generally range from the low to mid 30s.
Issued by National Weather Service RAPID CITY SD 203 PM CST Tue Jan 23 2018 19z surface analysis had weak high pressure from eastern MT into eastern CO. Wednesday will feature southwest return flow as upper ridge moves toward the plains states.
Temperatures range from the lower 40s north to the lower 50s across parts of North Mississippi.
The upper low that produced a band of heavy snow across northwest KS northeast across central and northeast NE, and produced 1 to 3 inches of snowfall across the TOP CWA, was located across the mid MS river valley early this morning. The upper low will lift northeast across the eastern Great Lakes This afternoon and then into New England Tonight. Skies will gradually clear this morning across northeast and east central KS as the upper low continues to lift northeast towards the eastern Great Lakes. Morning lows will dip into the lower 20s across the western counties where skies will be clear and into the mid to upper 20s across the eastern counties with the cloud cover lingering. The southern counties did not see much in the way of accumulating snowfall and may warm into the lower to mid 40s.
The deeper layer moisture will start increasing over the RGV from the south as a 500 mb closed low approaches the region from the west tonight through Wed Night. Sct pockets of 500 mb vorticity will rotate around the base of the trough axis moving across the RGV.
The deeper layer moisture will then start increasing over the RGV from the south as a 500 mb closed low approaches the region from the west. High pressure over North Texas will maintain northeast winds with VFR conditions likely through the next 24 hours.
254 PM EST Tue Jan 23 2018 Cold front will move offshore this afternoon with breezy conditions into this evening.
with gustier winds and warmer temperatures also expected.
429 PM EST Tue Jan 23 2018 Short Term (This afternoon through Wednesday night): Slow moving cold front is responsible for showers and a few thunderstorms that have been occurring this afternoon, mainly over northern portions of South Florida, including the Lake region. The cold front will move through South Florida tonight. The cold front has been weakening significantly as it moves southeastward, so this cold front will not bring air as cold as the fronts earlier this month. The coldest night will be Wednesday night, when lows are forecast to range from the upper 40s in Glades County to the lower 60s along the southeast beaches.
/Issued 1035 AM CST Tue Jan 23 2018/ Some clouds linger across northwest AR and far northwest corner of OK this morning, but should clear off soon as upper low continues lifting northeast. This leaves us with a sunny and slightly warmer afternoon. As a result, a sunny day is expected across eastern Oklahoma and western Arkansas with high pressure building across the area at the surface.
1131 AM MST Tue Jan 23 2018 High pressure over the Rockies this morning.
Cumulus and stratocumulus was well entrenched over the lower OH Valley, MS Valley, and Great Lakes. Moisture is expected to remain at the low levels near and below 850 mb and low clouds should persist through at least Wednesday evening. The trough departs to the northeast on Wednesday night with mid level heights rising across the Southeast and into the Lower OH Valley and TN Valley regions. A ridge of high pressure will prompt south to southwest winds which in turn will transport warm air off the Gulf of Mexico into the Tennessee and Ohio valley regions.
1026 AM CST Tue Jan 23 2018 High pressure continuing to build across the region to maintain northwest winds around 5 to 10 mph today. Northwest flow aloft due to upper-level ridge of high pressure across the Rockies to allow for clear skies areawide. /issued 455 AM CST Tue Jan 23 2018/ The Four State Region will be under the influence of high pressure on the surface and aloft for much of the rest of this week resulting in a fair weather pattern with near normal temperatures. Overnight lows the next couple of night will lower to near or below freezing.
High pressure in control at the surface will yield light to moderate northerly winds through this evening becoming light overnight. /issued 445 AM CST Tue Jan 23 2018/ Deep upper low that brought showers and storms to the area yesterday morning is now quickly moving into the Great Lakes region. At the sfc, high pres continues to ridge east over the area, with dry and cool conditions in place early this morning.
Temperatures look on track with highs ranging from the low 50s in the north to the low 60s in the south. Following yesterday's frontal passage, high pressure at the surface will slide south and east into our area today. Temperatures today will be just about what is normal for late January with highs ranging from the lower 50s in the north to around 60 in the south. With clear skies and light northerly winds, cooler conditions will occur tonight. Overnight lows will drop into the lower to mid 30s areawide.
/issued 1026 AM CST Tue Jan 23 2018/ High pressure continuing to build across the region to maintain northwest winds around 5 to 10 mph today. Northwest flow aloft due to upper-level ridge of high pressure across the Rockies to allow for clear skies areawide. /issued 455 AM CST Tue Jan 23 2018/ The Four State Region will be under the influence of high pressure on the surface and aloft for much of the rest of this week resulting in a fair weather pattern with near normal temperatures. Overnight lows the next couple of night will lower to near or below freezing.
318 PM EST Tue Jan 23 2018 A cold front will exit central NC early this afternoon.
As Wednesday morning wanes into Wednesday afternoon, snow levels will rise and cause snow in valleys of north central Idaho and northwest Montana to mix with rain and/or freezing rain at times before changing over to all-rain in the afternoon.
339 PM CST Tue Jan 23 2018 Current GOES-16 WV imagery shows yesterdays mid- latitude cyclone over the eastern Great Lakes region with the closed upper level low beginning to fill in the past few hours. Associated cold front continues to push through the eastern CONUS and nearly ready to make its way offshore. Also, any fog that develops would be very patchy and probably only ground fog, if that, due to cloud cover in place and dry air mixing in from the lowest levels above the surface.
Temperatures will continue to fall into the low-30s through this afternoon.
A cooler airmass has also moved in with temps generally in the 40s this afternoon with a few readings around 50 across North Mississippi. This deck will retreat east as the low level thermal trough pushes east over the next 12 hours. /issued 325 AM CST Tue Jan 23 2018/ Temperatures this morning are in the low to mid 40s with some mid-level cloudiness in northern areas due to the proximity of an upper-level low to our north. The influence of this upper low will be gone by midday, with any remaining cloud cover exiting to the northeast with it.
A weak upper ridge with areas of clear skies and light winds resulted in patchy fog in some locations this morning, including the Lower Treasure Valley near Ontario and the Long Valley near McCall. Moisture along a warm front will bring increasing clouds and light precipitation to northern areas (mainly from Baker County to the West Central Idaho mountains) this afternoon.
Large upper low off the BC coast with a plume of moisture streaming into the Pacific northwest.