Aikyam-Lab/Synoptic-Bench huggingface dataset:
1156 AM CST Wed Nov 6 2019 Early morning water vapor imagery showed an elongated trough across the Canadian Provinces with clipper system beginning to dig into British Columbia and Alberta. Further to the south, a weak trough was moving inland towards the Baja Peninsula with ridging downstream across New Mexico and Texas. As of 09Z, surface observations indicated the cold front was pushing through Central Nebraska, generally extending from Sioux City,IA to Grand Island, NE and extending back to the west towards Torrington, WY. Today we will see one more mild day ahead of the incoming cold front. Temperatures will rise into the 50s to near 60 before the cold front pushes through later today with temperatures quickly falling behind the front. Any precipitation should be winding down by Thursday morning as high pressure, and those colder temperatures, surge in.
An upper level ridge will keep weather systems away from Western Washington until late in the week.
The lower atmosphere will continue to moisten in the upslope/post-frontal regime. These two items are conducive for drizzle and then freezing drizzle production. Have the highest confidence of at least one kilometer thick saturated profile roughly from Benkelman to Gove and points west and southwest. Forecast soundings across the eastern Colorado counties do show a profile that is very supportive of freezing drizzle. The freezing drizzle could lead to some slick elevated surfaces late tonight. Drier air underneath the high will eventually start to advect in from the north and northeast, with the clouds and drizzle eroding from the northeast to the southwest by early morning. For Thursday, high pressure will eventually move off to our east. These areas might see slightly cooler highs for tomorrow.
250 PM MST Wed Nov 6 2019 Current surface analysis shows cold front well south of the region, with high pressure centered over northeast MT. Upper level analysis shows large trough over much of the central and eastern US, with low over southeastern Hudson Bay. Cutoff low is located over the southwest US, with a ridge off the Pacific NW coast. Lingering snow will taper off across southwest SD late today and early evening, with gradual clearing from the north as high pressure slides southeast across the Dakotas tonight. Lows will be in the teens for most areas, with some single digits across the higher Black Hills and portions of the plains.
925 PM EST Wed Nov 6 2019 Showers will return late tonight and persist into tomorrow with a cold front, before transitioning to snow in the afternoon.
335 PM CST Wed Nov 6 2019 Light rain is expected to increase in both coverage and intensity this evening and overnight as a strong cold front approaches from the North. The cold front should approach Jackson, TN, Memphis, and Tunica, MS by sunrise and Move into Middle Tennessee and Northwest Alabama around Midday. 25 inch range highest in Northeast Arkansas with the lower totals in Northeast Mississippi.
Skies will clear from north to south overnight and with decreasing winds, will allow for very cold temperatures overnight into the low teens and single digits.
This is thanks to a low pressure advecting in warmer air. A cold front, already in our northwest, will continue sliding south, shifting winds to the north and creating gusty conditions. The cold front and precipitation will exit the area tomorrow morning around sunrise. Much colder temperatures will filter in behind the front, with lows tomorrow morning dropping into the low 20s to low 30s. High pressure will stick around for Thursday and Thursday night, keeping temperatures well below normal.
Winds will remain light with the ridge moving across the area. We may see a quick drop off in temperatures again into Thursday night, mainly to the east as the high departs and winds become more southerly. The period will commence with extensive high pressure from the Great Lakes southwestward into the TX/OK Panhandle area. Meanwhile, a warm front will be sweeping across the Dakotas. Aloft, a trough will be sitting over the East Coast with a ridge over the West Coast, putting the north-central CONUS directly under solid northwest flow. The trough over the East Coast will generally remain in place as an upper low rotates atop Hudson Bay. This will help sustain and even strengthen not only the East Coast trough but also the northwest flow over the Dakotas and MN/WI.
Taking a look at current conditions around 20Z, 1041mb high pressure was set up over southern Saskatchewan and eastern MT. Plenty of cumulus clouds have developed in the clear air across ND, along with lake enhanced/river enhanced streamers potentially with light snow or flurries as cold air moves over the warmer water. Expect light winds will filter in at the surface as the high shifts across central SD by 06Z Thursday. Warm air advection will take hold during the day Thursday as the high sinks into IA and 850mb temperatures rebound to 0 to -12C (warmest southwest of Pierre). While surface temperatures will remain similar across eastern SD and west central MN, temperatures will end up about 10 degrees warmer Thursday over Central SD (topping out in the 30s).
740 PM EST Wed Nov 6 2019 High pressure will build across the middle Atlantic states through tonight. A warm front will retreat northward across the Carolinas on Thursday, before a strong cold front crosses the region Thursday night. An Arctic cold front accompanying the northern stream trough will sweep east through the area Thursday night.
Today, a weak closed area of low pressure moved south of our area, impacting mostly central Arizona. Far southeastern Mohave County experienced an increase in cumulus clouds with isolated sprinkles, but nothing more of note as the low pressure continued to push eastward out of our area. Going into the latter half of the week, above-average temperatures will persist under a strong West Coast ridge. Through the weekend, another area of low pressure will spin off the Baja Coast and begin to push inland. As mentioned in previous discussions, this area of low pressure and its associated moisture is expected to move farther south than today's system, resulting in little to no impacts for our area. The related short wave trough will help to bring temperatures down a couple of degrees but will still remain above seasonal averages.
After this band of light snow, an area of high pressure will build in from the northwest and remain over the region through Thursday. The colder start will also hold down temperatures some Thursday with highs only in the lower to middle 20s. High pressure will be scooting overhead Thursday night, which should make for a chilly night in the single digits for most of the area, especially where somewhat fresh snow cover remains.
Looking at the big picture, the global pattern has shifted gears into a pattern with a dominate west coast ridge and Hudson Bay low, which places Utah under quiescent northwesterly flow aloft. The impact to Utah is some high-thin cloud cover this afternoon that will clear out tonight, along with an ever-so-slightly cooler northerly flow behind the weak wave passage.
with continued ridging southwest across Southeast Texas and Southern Louisiana keeping an easterly flow.
Upper level ridging will persist over the Rockies or near the West Coast through mid November. This is also a very dry pattern, so that only very light precipitation in the wake of the cold fronts can be expected. Ahead of a feature, a cold front will surge through western Kansas this evening. If so, then a transition to freezing drizzle would be expected after 06z at DDC and then shifting southward through 12z.
435 PM MST Wed Nov 6 2019 Current surface analysis shows cold front well south of the region, with high pressure centered over northeast MT. Upper level analysis shows large trough over much of the central and eastern US, with low over southeastern Hudson Bay. Cutoff low is located over the southwest US, with a ridge off the Pacific NW coast. Lingering snow will taper off across southwest SD late today and early evening, with gradual clearing from the north as high pressure slides southeast across the Dakotas tonight. Lows will be in the teens for most areas, with some single digits across the higher Black Hills and portions of the plains.
Showers will develop during the afternoon hours when a cold front will move through the region. with continued ridging southwest across Southeast Texas and Southern Louisiana keeping an easterly flow.
226 PM MST Wed Nov 6 2019 High pressure around 1042 MB will continue to move southeast across the region this evening into tonight.
Overall coverage of showers and storms will increase during the late afternoon and evening as trough/low over the southwestern U. Meanwhile, a strong cold front is approaching from the north and will move into far northwest Oklahoma by 8-9 pm. The cold front will also add additional lift for storms and may bring another area of locally heavy rainfall to parts of central Oklahoma. Temperatures are expected to fall below freezing across northwest/west central Oklahoma during the late overnight hours. This may result in areas of light freezing rain/sleet before drier air advects into the area.
638 PM EST Wed Nov 6 2019 Showers will return Thursday with a cold front before transitioning to snow in the afternoon.
/Tonight through Wednesday/ A cold front pushed through most of Iowa as of 2 PM and will exit the far southeast by 5 PM. At this time road temps were just above freezing with bridges just below. High pressure moves in overnight pushing in a lot of dry air.
337 PM CST Wed Nov 6 2019 Upper level ridging will persist over the Rockies or near the West Coast through mid November. This is also a very dry pattern, so that only very light precipitation in the wake of the cold fronts can be expected. Ahead of a feature, a cold front will surge through western Kansas this evening. If so, then a transition to freezing drizzle would be expected after 06z at DDC and then shifting southward through 12z.
An associated surface cold front will press south into the Ohio Valley region tonight, and is expected to shoot south of forecast area by mid morning Thursday. Updated at 335 PM Wed Nov 6 2019 Dry but much colder air will then filter into the region Thursday night into the early weekend as Canadian high pressure settles southeast. After morning lows in the lower/mid 20s Fri morning, afternoon high temps will only make it to near 40 degrees at most locations, despite a return to sunshine.
Temperatures today have been cooler than they were yesterday.
These showers have weakened slightly and the 00z OHX sounding shows plenty of dry air in the low levels. The main batch of showers will be associated with the large, broad trough and associated surface front.
/issued 335 PM CST Wed Nov 6 2019/ Light rain is expected to increase in both coverage and intensity this evening and overnight as a strong cold front approaches from the North. The cold front should approach Jackson, TN, Memphis, and Tunica, MS by sunrise and Move into Middle Tennessee and Northwest Alabama around Midday. 25 inch range highest in Northeast Arkansas with the lower totals in Northeast Mississippi.
The low level moisture has been pushed down into southeast WA and northeast Oregon.
Daytime temperatures will slowly warm to near freezing with very light winds throughout the daylight hours.
259 AM CST Thu Nov 7 2019 Skies are cloudy across the Mid-South area early this morning with temperatures in the low to mid 50s. The rain is ahead of a cold front which currently extends from extreme northern Kentucky through southeast Missouri and into extreme southern Oklahoma. As this cold front continues to push south, the area of rain will spread south into the remainder of the Mid-South. As the cold front moves into the region, colder air will start to move into the Mid-South. Temperatures will start falling behind the cold front as early as late this morning. By tonight, the cold front will be well south of the region with rain exiting the Mid-South before midnight. High pressure will be covering much of the eastern and central U.
Mid and high level cloud cover across southern Utah, associated with a weakening upper low traversing the Desert Southwest, is dissipating owing to a combination of subsidence and dry air entrainment.
The much advertised strong cold front had finally reached Osage county of Northeast Oklahoma at 03z this evening. widespread rain showers along with isolated to scattered thunderstorm potential will continue across the CWA overnight as the strong cold front makes its way through the region. The greater thunder potential and widespread heavy rainfall should shift southeast through the night with the movement of the cold front. Behind the cold front.
1032 PM EST Wed Nov 6 2019 Deep mean-layer ridging centered over the Gulf of Mexico supports a 1030 mb high pressure center near the Delmarva. Temperatures are in the lower 80s with dewpoints in the mid 70s. High pressure will remain over the Western Atlantic and Florida tonight and Thursday. A cold front will move south down the Florida Peninsula Friday, then weaken across the Florida Keys Friday Night.
328 AM EST Thu Nov 7 2019 Key West radar is tracking a few strong showers in the Florida Straits waters south of the lower Keys. There are no major changes in the forecast thinking between now and the front bridging through beginning tomorrow night. The Keys are currently sitting on the southern periphery of a large lower tropospheric anticyclone parked over the eastern seaboard. As it rolls off the coast towards the northeast, a low amplitude trough digs into the southeast pushing a boundary into our area beginning Friday afternoon.
1030 PM MST Wed Nov 6 2019 Current surface analysis shows cold front well south of the region, with high pressure centered over northeast MT. Upper level analysis shows large trough over much of the central and eastern US, with low over southeastern Hudson Bay. Cutoff low is located over the southwest US, with a ridge off the Pacific NW coast. Lingering snow will taper off across southwest SD late today and early evening, with gradual clearing from the north as high pressure slides southeast across the Dakotas tonight. Lows will be in the teens for most areas, with some single digits across the higher Black Hills and portions of the plains.
239 AM CST Thu Nov 7 2019 High pressure building in from the Dakotas providing a mostly clear and cold night across the area early this morning. High pressure will slide into the area today and settle overhead tonight. Lows set to tank tonight with the high overhead and mostly clear skies through at least midnight. In case you were wondering, these temperatures are some 20-25 degrees below our norms for early November! Warm air advection (relatively warmer) kicks in Friday/Friday night with increasing cloud cover as the high slides east and low pressure approaches from the Northern Plains.
Area of freezing drizzle this morning had ended across the central and northwest Sandhills as colder and drier air moved in. The upper trough across the Northern Plains and Great Lakes Region will drop southeast tonight. Forecast lows were lowered a few degrees to the low to mid teens. Upper ridging will build into the region through Friday night. On Friday, as 850mb temperatures warm to near 13C southwest, highs reach the lower to mid 60s central and southwest and around 55 northeast.
239 AM CST Thu Nov 7 2019 High pressure building in from the Dakotas providing a mostly clear and cold night across the area early this morning. High pressure will slide into the area today and settle overhead tonight. Lows set to tank tonight with the high overhead and mostly clear skies through at least midnight. In case you were wondering, these temperatures are some 30 degrees below our norms for early November! Warm air advection (relatively warmer) kicks in Friday/Friday night with increasing cloud cover as the high slides east and low pressure approaches from the Northern Plains.
A ridge of high pressure will continue building into the region tonight with dry conditions prevailing. Some patchy fog may develop over the lower columbia basin that includes pasco and hermiston.
High pressure has settled in for today. However, an upper-level trough currently situated across the Great Lakes region is deepening, and propagating eastward. This front will quickly usher out the now weak high pressure system, and another cold front will be pushing into the region tomorrow. This front will be rather weak in nature, but it will bring cooler and drier conditions once more, and ultimately the continuation of quiet weather.
The lower atmosphere will continue to moisten in the upslope/post-frontal regime. These two items are conducive for drizzle and then freezing drizzle production. Have the highest confidence of at least one kilometer thick saturated profile roughly from Benkelman to Gove and points west and southwest. Forecast soundings across the eastern Colorado counties do show a profile that is very supportive of freezing drizzle. The freezing drizzle could lead to some slick elevated surfaces late tonight. Drier air underneath the high will eventually start to advect in from the north and northeast, with the clouds and drizzle eroding from the northeast to the southwest by early morning. For Thursday, high pressure will eventually move off to our east. These areas might see slightly cooler highs for tomorrow. For Friday, a weak lee trough with a downslope pattern is expected across northwest Kansas.
923 PM CST Wed Nov 6 2019 A potent cold front that is currently located across Central Missouri will push into the Mid-South tomorrow. /issued 335 PM CST Wed Nov 6 2019/ Light rain is expected to increase in both coverage and intensity this evening and overnight as a strong cold front approaches from the North. The cold front should approach Jackson, TN, Memphis, and Tunica, MS by sunrise and Move into Middle Tennessee and Northwest Alabama around Midday. 25 inch range highest in Northeast Arkansas with the lower totals in Northeast Mississippi.
Ceilings will improve to MVFR/VFR by mid- morning ahead of a cold front that will move through the region. with continued ridging southwest across Southeast Texas and Southern Louisiana keeping an easterly flow. Changes coming Thursday into Friday as a strong cold front will be moving through the region. Chances of showers and perhaps an isolated thunderstorm will increase ahead of the front Thursday afternoon, and continue for a short while after the cold frontal passage. By Friday, the upper air pattern will be dominated with a large scale long wave trough across the Central and Eastern U.
Poor IFR or blo flight conditions ongoing across the region ahead of a cold front. Behind the cold front, flight conditions will improve gradually and will eventually return to VFR during to the day on Thursday. The much advertised strong cold front had finally reached Osage county of Northeast Oklahoma at 03z this evening. widespread rain showers along with isolated to scattered thunderstorm potential will continue across the CWA overnight as the strong cold front makes its way through the region. The greater thunder potential and widespread heavy rainfall should shift southeast through the night with the movement of the cold front. Behind the cold front.
/issued 923 PM CST Wed Nov 6 2019/ A potent cold front that is currently located across Central Missouri will push into the Mid-South tomorrow. /issued 335 PM CST Wed Nov 6 2019/ Light rain is expected to increase in both coverage and intensity this evening and overnight as a strong cold front approaches from the North. The cold front should approach Jackson, TN, Memphis, and Tunica, MS by sunrise and Move into Middle Tennessee and Northwest Alabama around Midday. 25 inch range highest in Northeast Arkansas with the lower totals in Northeast Mississippi.
This is thanks to a low pressure advecting in warmer air. A cold front, already in our northwest, will continue sliding south, shifting winds to the north and creating gusty conditions. The cold front and precipitation will exit the area tomorrow morning around sunrise. Much colder temperatures will filter in behind the front, with lows tomorrow morning dropping into the low 20s to low 30s. High pressure will stick around for Thursday and Thursday night, keeping temperatures well below normal. On Friday, the high pressure will move east, returning southerly flow and warmer temperatures to the area.
Quiet conditions continue this evening, with the cold front through the area. Temperatures will be a couple degrees cooler on Thursday in response to the frontal passage. However, models are showing the potential for a return of stagnant air by Friday under prevailing high pressure.
Ceilings will fall rapidly along and in the wake of the cold frontal passage with at least MVFR ceilings and VSBYS along with -SHRA overspreading the region through much of the late morning and afternoon hours on Thursday.
TFJ High pressure around 1042 MB will continue to move southeast across the region this evening into tonight. Drastically warmer temperatures are expected Friday with highs ranging from the mid-40s in the far northeast to the middle 50s in the southwest. Dry conditions and relatively light winds will accompany the warmer temperatures.
Daytime temperatures are expected to climb into the mid to upper 30s later today after the lower clouds clear out. We will see a slight improvement in temperatures Friday as the high pressure starts to slide east and surface flow becomes more southerly.
321 AM CST Thu Nov 7 2019 Early this morning a mid-level wave was moving southeast across the northern and central Plains within the broad trough centered over James Bay. This feature will continue to move across the Plains and into the Great Lakes region by afternoon as the trough progresses east. High pressure of arctic origin will will continue to build southward into northeast Kansas this morning allowing the pressure gradient to weaken and decrease the gusty north winds.
/issued 259 AM CST Thu Nov 7 2019/ Skies are cloudy across the Mid-South area early this morning with temperatures in the low to mid 50s. The rain is ahead of a cold front which currently extends from extreme northern Kentucky through southeast Missouri and into extreme southern Oklahoma. As this cold front continues to push south, the area of rain will spread south into the remainder of the Mid-South. As the cold front moves into the region, colder air will start to move into the Mid-South. Temperatures will start falling behind the cold front as early as late this morning. By tonight, the cold front will be well south of the region with rain exiting the Mid-South before midnight. High pressure will be covering much of the eastern and central U.
For tonight, very cold weather is expected with lows in the low 20s and upper teens.
Western locales are seeing calm winds as ridge axis transitions thru the area. There still will be a few spots seeing patchy freezing fog/drizzle before sunrise, but overall it is done with only slick roadways left to affect portions of the region.
These southwest winds will warm temperatures back above freezing in Minnesota.
354 AM CST Thu Nov 7 2019 The strong cold front is more or less on schedule, now extending from near McAlester to Ardmore to south of Wichita Falls, Texas. It will continue its southward advance today, ushering in much cooler/colder weather to Oklahoma and north Texas. Precipitation will continue behind the front, extending this morning into northwest Oklahoma, where temperatures are below freezing. Some light accumulations of ice are possible in the northwest, though roads (except bridges/overpasses) should be warm enough to remain ice-free.
433 AM MST Thu Nov 7 2019 Areas of fog & freezing drizzle are ongoing across a large part of the CWA early this morning. A Freezing Fog Advisory will remain in effect until 6 AM this morning for current hazards including low visibilities & slick roads. Otherwise, decreasing clouds today w/ temperatures trending warmer for much of the area.