Aikyam-Lab/Synoptic-Bench huggingface dataset:
The pressure gradient between the front and approaching high pressure looks to begin to slacken from west to east after sunrise, so current Wind Advisory and High Wind Warning headlines look good, with the western CWA seeing the high winds diminish early this morning, then the east by midday or so. The aforementioned high pressure system begins to nose down from the northwest tonight, becoming centered over North Dakota on Wednesday. Colder air will make a return with the high as well, particularly tonight and Wednesday. This period will kick off Wednesday night with an arctic airmass in place thanks to a 1045 mb high pressure system that will build in across the area.
A large trough is setting up in the western parts of the nation which will be the setup for the upcoming winter storm for the middle portions of this week. A cold front is currently moving through and we should see breezy northeast winds across the region today ushing in the first round of cold air advection. This wave should provide lift along the cold front draped from central Oklahoma into south central Kansas. Tonight arctic air will sweep across the area quickly dropping us below freezing. This quick temperature change should ensure that any liquid precipitation should change quickly to snow with no real mix phased change of sleet or freezing rain. A 700 mb closed low in Colorado will move into Kansas during the afternoon and arctic air will continue to advect in through the day.
A cold frontal system will bring increasing winds today and Wednesday, along with some colder air for the latter part of the week.
407 AM EST Tue Feb 1 2022 The forecast are will remain under the influence of ridging aloft as it builds eastward into the Atlantic. The main concern once again today will be dry fire weather conditions with MinRH once again in the lower 30s with areas in the upper 20s. With good sunshine today, we'll see afternoon highs warmer than normal. Mainly high clouds will begin increasing overnight, keeping overnight lows warmer than the past several days. Even with increased clouds tomorrow, southerly flow will once again bring warmer than normal temperatures.
608 AM EST Tue Feb 1 2022 Dry high pressure today.
403 AM MST Tue Feb 1 2022 Light snow and below normal temperatures are expected through Wednesday across the Northern Rockies in wake of a strong cold front.
Ahead of the arctic boundary, unstable conditions will develop as the trough digs into the region causing snow showers. The Flathead Valley is most likely to have the highest impact from the above conditions due to the frontal passage being during the afternoon through the evening commute. Winds decrease on Wednesday as a ridge of high pressure builds to the west.
Look for increasing and thickening clouds today as a cold front approaches. Passage of the cold front tonight into Wednesday will bring areas of accumulating snow along with cold temperatures and gusty winds.
505 AM EST Tue Feb 1 2022 High pressure will give us one more day of dry weather before a low pressure system develops and pushes high pressure east. With the region under the influence of high pressure, mainly clear skies through the night will slowly give way to increasing cloud cover through dawn. Easterly flow through the overnight and into the day will allow for warmer temps in downslope flow. The main feature of the short term takes shape with the longwave trough setting up over the Midwest and moving east.
Temperatures are not going to move much today and most areas will see highs in the lower 20s. This evening a push of jet energy through the Pacific northwest causes the trough over Montana to elongate a bit and this supports a deepening of cold air.
352 AM CST Tue Feb 1 2022 It will be much cooler today behind a cold front with fairly steady temperatures that will struggle to rise.
520 AM CST Tue Feb 1 2022 A cold front will shift winds to the north this morning at all three terminals. /issued 250 AM CST Tue Feb 1 2022/ The initial cool down that will have us trending toward much colder temperatures will occur today as a cold front moves through the forecast area. The cold front will be south of the FA by tomorrow morning. Currently a mixture of freezing rain, snow, and liquid rain will be most probable across much of the FA given the presence of a warm nose. Currently rain and freezing rain look to be most likely across the far southeastern Rolling Plains. Any liquid or freezing rain should quickly change over to snow not too long after the onset of precip thanks to dynamic cooling.
411 AM MST Tue Feb 1 2022 Upper level analysis and water vapor imagery show a quick moving northern stream upper trough pushing east of the forecast area into the Upper Mississippi Valley this morning. Further upstream, an upper trough axis extends across the Central Great Basin into California. This trough axis will continue to pivot eastward with time, reinforced by a lobe of vorticity that is forecast to quickly dig across the Northern Rockies later today. This front will surge south of the forecast area today as a strong Canadian (1046-1048 mb) high pressure settles into the Northern Plains late tonight into Wednesday. As the aforementioned western trough axis strengthens and pivots eastward, expect an increase in snow chances across the southern half of the forecast area Wednesday afternoon and evening.
208 AM MST Tue Feb 1 2022 Upper level analysis and water vapor imagery show a quick moving northern stream upper trough pushing east of the forecast area into the Upper Mississippi Valley this morning. Further upstream, an upper trough axis extends across the Central Great Basin into California. This trough axis will continue to pivot eastward with time, reinforced by a lobe of vorticity that is forecast to quickly dig across the Northern Rockies later today. This front will surge south of the forecast area today as a strong Canadian (1046-1048 mb) high pressure settles into the Northern Plains late tonight into Wednesday. As the aforementioned western trough axis strengthens and pivots eastward, expect an increase in snow chances across the southern half of the forecast area Wednesday afternoon and evening.
High pressure building into the Mid-Atlantic will produce onshore flow, bringing warmer temperatures and higher dewpoints to east central Florida. Afternoon highs will be in the lower to mid 70s, right at normal for this time of year. High pressure building into the Mid-Atlantic will produce easterly winds 10 to 15 knots, increasing to 15 to 20 knots across the Brevard and Treasure Coast waters tonight.
Will see very light snow this afternoon and tonight as upper trof moves through and northerly flow aloft sets in tonight and Wednesday. NAM model hints at convergence zone overnight dropping south as upper trof moves east from upper snake highlands through Snake River Plain. Winds will be much lighter today as high pressure builds in.
650 AM EST Tue Feb 1 2022 Dry and warmer weather will be interrupted by a return of periodic precipitation for the late week period.
423 AM MST Tue Feb 1 2022 Winds have been slowly trending down over the past few hours so have allowed the High Wind Warning to expire early this morning as the focus switches to the cold temperatures.
401 AM EST Tue Feb 1 2022 Dry high pressure today.
Allowed all segments of the High Wind Warning to expire that were set to end at the top of this current hour.
A ridge of high pressure off the coast will lead to gusty northerly winds across much of the region over the next few days. A ridge of high pressure has returned to dominate the regional weather pattern. Will opt not to issued a wind advisory as the near 45 mph category for an advisory will mainly be seen along ridgetops and non-populated areas. The valleys and coastal areas that decouple from the wind will see chilly temperatures with locally near freezing temperatures. At elevations above 2000 feet upper slopes and ridges across this same area will also see northerlies gusting from 30 to 40 mph over the next 36 hours as well.
341 AM MST Tue Feb 1 2022 The first cold front is through the region, with brisk northwest winds finally winding down across the state.
Much cooler temperatures for the second half of the week.
Mid-level low across the Gulf of Mexico to open into a broad trough extending through east Texas into the Red River Valley this evening allowing for continued rain chances across portions of north Louisiana, southern Arkansas, and southeast Oklahoma.
544 AM MST Tue Feb 1 2022 Light snow and below normal temperatures are expected through Wednesday across the Northern Rockies in wake of a strong cold front.
Looking upstream, this trough is starting to deepen as it moves through the Great Basin. Latest model runs suggest that the trough will continue to gain amplitude until it passes over our area Wednesday afternoon. As the trough axis approaches, upper level support increases, creating the best lift late this evening into early Wednesday morning.
A sharp, positively tilted short wave trough will slice southwest over the Southwest United States tonight and will start to turn the midlevel flow more to southwest. Cold Canadian air will simultaneously plunge south over the High Plains into North Texas. NAM timing shows the approaching cold front still over Central Texas by the end of the day Wednesday.
It will be much cooler today behind a cold front with fairly steady temperatures that will struggle to rise.
212 AM PST Tue Feb 1 2022 A dry cold front will bring much colder temperatures and increased winds Tuesday and Wednesday.
500 AM MST Tue Feb 1 2022 The first cold front is through the region, with brisk northwest winds finally winding down across the state.
Light snow and below normal temperatures are expected through Wednesday across the Northern Rockies in wake of a strong cold front.
A cold front currently pushing through the forecast area is bring another shot of CAA and strong northwesterly winds to the region.
There were questions about whiteout conditions occuring due to freezing rain yesterday in northeast ND and older snow pack elsewhere.
605 AM CST Tue Feb 1 2022 While temperatures have been stable overnight, cold air advection ramps up today behind a surface cold front currently draped from western Minnesota to eastern Nebraska. Winds will remain elevated in wind prone areas west of the Mississippi River into the overnight hours before 850mb winds turn northerly and exhibit restraint under influence of lee anticyclone. Timing and location of the amplifying upper level trough and associated favorable regions of ascent remain more towards the Mid-Mississippi River Valley.
At this hour, a ridge-valley temp split of 15-20 degrees was observed with u20s-m40s. For today, the 5h ridge axis shifts east allowing southwest flow to develop in mid to upper levels. This as the compact upper low entering the northwest Gulf becomes an open wave. Southerly flow and a sunny sky will help to push temperatures into the lower 60s, perhaps the middle 60s in northwest AL. The open 5h wave becomes more diffuse tonight, while the surface and 8h lows lift northward through the lower MS into western TN by Wednesday morning. The low level jet at 8h increases 45-55kt (perhaps higher if the NAM is right) which will greatly amplify moisture transport and theta-E advection across MS into western TN. The higher PoPs may need to be shifted further east if this trend continues.
936 AM EST Tue Feb 1 2022 Dry high pressure today.
A cold front will push through the area today, bringing gusty winds and cooler air.
605 AM CST Tue Feb 1 2022 Have allowed the High Wind Warning and the Wind Advisory across portions of central South Dakota to expire. The pressure gradient between the front and approaching high pressure looks to begin to slacken from west to east after sunrise, so current Wind Advisory and High Wind Warning headlines look good, with the western CWA seeing the high winds diminish early this morning, then the east by midday or so. The aforementioned high pressure system begins to nose down from the northwest tonight, becoming centered over North Dakota on Wednesday. Colder air will make a return with the high as well, particularly tonight and Wednesday. This period will kick off Wednesday night with an arctic airmass in place thanks to a 1045 mb high pressure system that will build in across the area.
649 AM EST Tue Feb 1 2022 High pressure along with relatively dry air will remain in control of the region today.
/Issued 407 AM EST Tue Feb 1 2022/ The forecast are will remain under the influence of ridging aloft as it builds eastward into the Atlantic. The main concern once again today will be dry fire weather conditions with MinRH once again in the lower 30s with areas in the upper 20s. With good sunshine today, we'll see afternoon highs warmer than normal. Mainly high clouds will begin increasing overnight, keeping overnight lows warmer than the past several days. Even with increased clouds tomorrow, southerly flow will once again bring warmer than normal temperatures.
The gusty winds may produce some cooler feel to the air this afternoon and evening but things should calm down except for right along the Atlantic coast.
1227 PM PST Tue Feb 1 2022 Colder temperatures and increased winds Tuesday and Wednesday with low pressure moving through the Great Basin. Dry weather should persist for at least the first half of February with blocking high pressure near the west coast. Ensembles maintain the blocking area of high pressure along the west cost for the next 10-14 days. Sierra ridge winds should continue to climb tonight and early Wednesday AM, then decline Wednesday afternoon into Wednesday night. Ridge gusts, especially along the crest could exceed 100 mph tonight with some higher speeds mixing down through gaps in the terrain and over Lake Tahoe where gusts could peak in the 35-50 mph range. Minor tree damage is possible with the stronger winds in the higher terrain.
Valleys could see a light snow shower or flurry this evening as the trough axis passes. The lower elevations will be mixed again today with northwest flow down to the surface.
VFR through the period at all sites as high pressure prevails. CDG Chattanooga Airport, TN 60 43 55 51 65 / 0 10 60 90 70 Knoxville McGhee Tyson Airport, TN 59 34 57 46 64 / 0 10 50 90 70 Oak Ridge, TN 58 36 55 46 62 / 0 10 60 90 70 Tri Cities Airport, TN 55 31 54 43 61 / 0 0 40 80 70.
Currently, long wave trough over the Northern Plains region with the strong embedded S/WV impulse off to our east across northern Minnesota. Otherwise, strong Arctic high pressure settles over western and central North Dakota during the day Wednesday, with highs ranging from 10 below north to just above zero southwest.
1015 AM MST Tue Feb 1 2022 Upper level analysis and water vapor imagery show a quick moving northern stream upper trough pushing east of the forecast area into the Upper Mississippi Valley this morning. Further upstream, an upper trough axis extends across the Central Great Basin into California. This trough axis will continue to pivot eastward with time, reinforced by a lobe of vorticity that is forecast to quickly dig across the Northern Rockies later today. This front will surge south of the forecast area today as a strong Canadian (1046-1048 mb) high pressure settles into the Northern Plains late tonight into Wednesday. As the aforementioned western trough axis strengthens and pivots eastward, expect an increase in snow chances across the southern half of the forecast area Wednesday afternoon and evening.
At upper levels, there is a slight troughing over the Plains. At the sfc, the cold front that was across the state this morning has moved into KS. Also at the sfc (over Alberta), is a strong arctic high pressure system with isobars of higher pressure dripping southeast into the Plains. The backing wind flow regime will invite in the cold arctic air being brought SE by the high. This looks to be better the more south and west you move from the high pressure system. Into the day tomorrow, the jet lift support will move out of area and the high pressure system will continue to push more cold dry air into the state, resulting in a decrease in PoPs come evening.
1022 AM MST Tue Feb 1 2022 The first cold front is through the region, with brisk northwest winds finally winding down across the state.
242 PM EST Tue Feb 1 2022 High pressure along with relatively dry air will remain over the region today into a portion of Wednesday.
Gradual day-to-day warming can be expected through the week as an upper-level ridge remains firmly in place over the eastern Pacific. Can't rule out a few areas even approaching the freezing mark.
Currently, the axis of this trough is just upstream over the southern Gulf of Mexico, as evident in geostationary satellite moisture channel imagery. Currently, air temperatures in most Keys island communities are in the lower 70s, warmer than the last few days, but still below average for this time of year.
Expect cloudy skies and breezy westerly winds today ahead of a cold front due tonight and Wednesday. This cold front will bring areas of snow to the eastern portions of the state with blustery and cold conditions behind the front for most locations.
Warm front lifts through middle TN late tonight and through Wed morning. CD Chattanooga Airport, TN 43 55 51 65 40 / 10 70 90 70 80 Knoxville McGhee Tyson Airport, TN 34 57 46 64 39 / 0 60 90 70 80 Oak Ridge, TN 36 55 46 62 37 / 0 70 90 70 80 Tri Cities Airport, TN 31 54 43 61 41 / 0 40 80 70 80.
1040 AM EST Tue Feb 1 2022 Dry and warmer weather will be interrupted by a return of periodic precipitation for the late week period.
A pattern shift continues as high pressure sits northeast of the peninsula of Florida this morning with breezy northeasterly to easterly wind flow taking root across the area. The 12z MFL sounding shows that the surface inversion will eventually mix out with the warmer air just above the surface able to help the region warm into the 70s today under abundant sunshine. Expansive ridging over the western Atlantic Ocean has allowed for increased east/northeasterly flow across the region.
(Tonight ) Cold front will move into northeast Oklahoma this afternoon and clear western Arkansas and southeast Oklahoma soon after sunrise Wednesday. The stronger surge of cold air will somewhat lag the the frontal passage and temperatures at or below freezing are expected along the Interstate 44 corridor around sunrise. After midnight sub freezing temps push into NE OK and a freezing rain sleet mix develops near the OK / KS border gradually spreading southward through the early morning hours Wednesday.
This morning started out cool and dry again in Keys island communities, with overnight low temperatures ranging from near 60F to the lower 60s. It probably will be difficult for the temperatures to exceed lower 70s this afternoon owing to cloud cover and a wind trajectory off (a cooler) Hawk Channel. East breezes will freshen further tonight, as a high pressure cell expands and intensifies over the western North Atlantic.
1142 AM EST Tue Feb 1 2022 High pressure along with relatively dry air will remain over the region today.
Deep positive tilt trough over the Rockies and amplifying ridge over the eastern Pacific has placed the PacNW under a deep northwest flow aloft today, with upslope snow showers across the Cascades and the northeast mountains developing as a result.
Main story in later periods continues to be cold temperatures and associated wind chill impacts with mean upper ridge holding fairly firm along western U.
1135 AM CST Tue Feb 1 2022 It will be much cooler today behind a cold front with fairly steady temperatures that will struggle to rise.
138 PM EST Tue Feb 1 2022 High pressure along with relatively dry air will remain over the region today.
1130 AM CST Tue Feb 1 2022 While temperatures have been stable overnight, cold air advection ramps up today behind a surface cold front currently draped from western Minnesota to eastern Nebraska. Winds will remain elevated in wind prone areas west of the Mississippi River into the overnight hours before 850mb winds turn northerly and exhibit restraint under influence of lee anticyclone. Timing and location of the amplifying upper level trough and associated favorable regions of ascent remain more towards the Mid-Mississippi River Valley.
1011 AM EST Tue Feb 1 2022 A pattern shift continues as high pressure sits northeast of the peninsula of Florida this morning with breezy northeasterly to easterly wind flow taking root across the area. The 12z MFL sounding shows that the surface inversion will eventually mix out with the warmer air just above the surface able to help the region warm into the 70s today under abundant sunshine. Expansive ridging over the western Atlantic Ocean has allowed for increased east/northeasterly flow across the region.
539 PM EST Tue Feb 1 2022 The surface cold front is passing through the western U. by sunset so the earlier introduced slight chances of precipitation for this low certainty, but possible scenario continue. As a cold front continues to make its way through Upper Michigan late this evening, temperatures will continue to drop, and northwest winds will gust to 35 to 40 mph, especially over Copper Country where gusts in excess of 50 mph will not be uncommon. through the end of the week as high pressure moves through the CONUS.
A strong upper level trough was getting carved out over the western U. Across the central High Plains, the cold front that pushed through western Kansas last night now extends from eastern Kansas to western Oklahoma and southwest Texas. Storm total QPF is the highest over southwest Kansas where up to a half inch may be possible.
The low level clouds that could produce some minimal rainfall overnight, are moving from east to west and reaching the coastal counties. Temperatures after increasing to the lower-mid 70s today, will drop the mid 50s for urban interior and coastal counties and to the upper 40s for rural interior.
709 PM EST Tue Feb 1 2022 The persisting high pressure gradually migrates into the west Atlantic through the next couple of days with mainly dry conditions prevailing. The gusty winds may produce some cooler feel to the air this afternoon and evening but things should calm down except for right along the Atlantic coast.
549 PM CST Tue Feb 1 2022 (Tonight ) Cold front will move into northeast Oklahoma this afternoon and clear western Arkansas and southeast Oklahoma soon after sunrise Wednesday. The stronger surge of cold air will somewhat lag the the frontal passage and temperatures at or below freezing are expected along the Interstate 44 corridor around sunrise. After midnight sub freezing temps push into NE OK and a freezing rain sleet mix develops near the OK / KS border gradually spreading southward through the early morning hours Wednesday.
656 PM EST Tue Feb 1 2022 One more day of dry and warmer weather before a large system brings mixed precipitation and colder air to the region.
Temperatures are steady or slowly falling through the single digits above zero east of the James River valley, while slowly warming through the teens above zero in and west of the James River valley, with some areas seeing readings warming into the low 20s across the western/southwestern CWA.
The arctic cold front pushed through Essex on US Highway 2 and across eastern portions of the Glacier National Park as of 100pm MST this afternoon. The arctic air will gradually move east of the region as high pressure builds over the Pacific Northwest and Eastern Pacific.
649 PM EST Tue Feb 1 2022 High pressure along with relatively dry air will remain over the region today into a portion of Wednesday.