Aikyam-Lab/Synoptic-Bench huggingface dataset:
1117 AM MDT Mon Oct 30 2023 Temperatures across the Grand Valley as well as the valleys of east-central and southeast Utah have all risen above freezing over the last hour. Expect temperatures to warm back up above freezing or at least above the hard freeze within the next hour or two. Tonight should be another chilly night, but warmer than this morning by a few degrees. An amplified ridge over the West Coast will drift eastward over the next several days, and help modify the air mass so expect temps to warm gradually this week. By mid week a trough moves into the Pacific Northwest.
Southern areas likely to see clouds persist through the night and will likely remain above freezing. Forecasts seem to suggest a late break up of the clouds and perhaps a near-sunrise drop to freezing.
2) A secondary cold front will sweep through the region Tuesday afternoon, resulting in increasing clouds, blustery northwest winds, and perhaps some sprinkles across the EVV Tri-State Tuesday afternoon.
204 PM MDT Mon Oct 30 2023 Latest upper air analysis shows northwest flow over the High Plains. At the surface a weak cold front is seen approaching South Dakota. Meanwhile temperatures will be a little cooler than yesterday, especially over the eastern part of the forecast area. There will be several cold front passages. The upper level ridge continues to dominate the weather pattern over the western CONUS.
High temperatures have been 10-15 degrees cooler than average for late October. Overall pressure gradients are weaker tonight compared to last night, so wind speeds in the downslope areas south of the Mogollon Rim and Bradshaw Mountains will be lighter with the highest gusts around 30 mph.
113 PM EDT Mon Oct 30 2023 Low pressure continues to progress northeast of the area with scattered showers continuing across Central PA.
A cold front is current pushing southeastward across the area and has spurred light rain across northwest portions of the area.
Expect temperatures to warm back up above freezing or at least above the hard freeze within the next hour or two. Tonight should be another chilly night, but warmer than this morning by a few degrees. An amplified ridge over the West Coast will drift eastward over the next several days, and help modify the air mass so expect temps to warm gradually this week. By mid week a trough moves into the Pacific Northwest.
149 PM MDT Mon Oct 30 2023 A weak disturbance brushing eastern Montana, and an associated cold front dropping through the area has brought breezy northwest winds to eastern areas this afternoon, with some localized blowing/drifting snow. Warmer conditions can be expected for Tuesday as ridging pushing in from the west gets flattened, allowing for more zonal, westerly downslope flow to develop over the area.
201 PM EDT Mon Oct 30 2023 Low pressure and a cold front will move off to the east today, allowing widespread rain to come to an end. High pressure will build into the region tonight, resulting in clearing skies and freezing temperatures. The high will quickly be replaced by another low pressure system later Tuesday into Tuesday night, bringing a chance of rain and or snow showers. Drier weather will then return for mid week as high pressure builds back into the region. There is some dry air in the low levels, however expect the strength of this system to overcome this with the better chances the further north you go.
1156 AM MDT Mon Oct 30 2023 Latest upper air analysis shows northwest flow over the High Plains. At the surface a weak cold front is seen approaching South Dakota. Meanwhile temperatures will be a little cooler than yesterday, especially over the eastern part of the forecast area. Dry conditions continue with a northwest flow early in the period transitioning to more of a zonal flow by the end of the period as the west coast ridge breaks down.
153 PM MDT Mon Oct 30 2023 Key Messages: - Advisory level winds for some areas in western SD today - Light flurries possible the latter half of today - A gradual warm-up expected over the week Current Water Vapor and upper air analysis show the trough axis extending from the Hudson Bay region southwest through the south central plains.
A weak cold front will move through the Panhandles Tuesday morning, but it will not have much of a cooling effect as highs on Tuesday are expected to be the same to 8 degree warmer on Tuesday over today.
(Tonight through Tuesday night) As the upper-level trough that was responsible for this mornings cold front moves further east, strong northerly flow will continue to bring cooler air to Deep South Texas. Temperatures will continue to fall overnight, with lows reaching the low to mid 40s.
1204 PM MDT Mon Oct 30 2023 Temperatures across the Rifle and Montrose areas have all risen above freezing over the last hour. Temperatures across the Grand Valley as well as the valleys of east-central and southeast Utah have all risen above freezing over the last hour. Expect temperatures to warm back up above freezing or at least above the hard freeze within the next hour or two. Tonight should be another chilly night, but warmer than this morning by a few degrees. An amplified ridge over the West Coast will drift eastward over the next several days, and help modify the air mass so expect temps to warm gradually this week. By mid week a trough moves into the Pacific Northwest.
201 PM EDT Mon Oct 30 2023 Wave of low pressure tracks across the area today with widespread rain. A weak wave of low pressure riding along a stationary front will push across the region today. Some lake effect showers still be generated and with temperatures around freezing Tuesday night, precip types will largely be snow at elevations above 1000 feet and a rain snow mix to valley floors.
Weak northerly winds will become more gusty tomorrow morning, as another reinforcing cold front moves across the area.
1225 PM CDT Mon Oct 30 2023 (Today through Tuesday) A cold front is currently completing its transition through the BRO CWFA, and a few changes and additions have been made to the inherited hazards associated with the frontal passage. Next, churned and elevated seas created by the cold front passage will create a High Risk of rip currents at the local beaches until at least sunset Tuesday.
This translates to lows in the 20s and teens for most lower valleys and single digit lows for the higher valleys and mountains. High pressure building out west will eventually slide over the region by Tuesday and flatten out as it does due to an active northern Pacific stream, advecting moisture into the Pacific Northwest and eventually Intermountain West by later in the week.
Concerning temperatures, lows tonight should be 1-4 C warmer then this morning's lows. Tuesday high should be 3-6 C warmer than today's highs. Northwest flow aloft will continue for the upcoming week and into the weekend as a large trough remains over the eastern part of North America and with ridging along the Pacific coast.
230 PM MDT Mon Oct 30 2023 Cool temperatures today with highs barely breaching freezing in some points. As the upper level ridge shifts eastward tomorrow, temperatures will increase closer to near-normal and winds will turn westerly.
1119 AM CDT Mon Oct 30 2023 (Rest of Today) A cold front is approaching the I-59 corridor and will exit the forecast area within the next 1-2 hours.
1258 PM CDT Mon Oct 30 2023 A cold front is current pushing southeastward across the area and has spurred light rain across northwest portions of the area.
149 PM EDT Mon Oct 30 2023 Ridging remains in place aloft this afternoon while at the surface, high pressure north of the area extends across the state as a low spins near the Bahamas. Winds become more northeast and north tonight into Tuesday as the low over the Bahamas slowly moves away from Florida.
1230 PM MDT Mon Oct 30 2023 - Cooler than normal temperatures this afternoon with clear skies. By sunrise, expect some subzero readings in the high mountain valleys. For tonight, there is an upper trof which will sweep through the northern plains states with a weak front which brushes northeast Colorado. Temperatures will be a bit warmer overnight given the winds and moderating the airmass. Tuesday, Colorado remains on the back side of an exiting upper level trough.
Record low max temps are likely for the I-35 climate sites, and the low maxes from the month of October are be within a degree or two of today's highs. If so, there could be a pocket or two of near freezing temps for Tuesday morning. As with most light freeze days, if you know your location tends to run colder than the nearby climate sites, adjust accordingly, as valley effects in light wind can lead to temps up to 5 degrees cooler than locations just a mile or two away.
1246 PM EDT Mon Oct 30 2023 Wave of low pressure tracks across the area today with widespread rain. A weak wave of low pressure riding along a stationary front will push across the region today. Some lake effect showers still be generated and with temperatures around freezing Tuesday night, precip types will largely be snow at elevations above 1000 feet and a rain snow mix to valley floors.
This had allowed for parts of the CWA to fall to/below freezing. though with sunrise temps have already warmed back above freezing. As high pressure center moves into the region.
With clear skies and lighter winds, temps should fall close to the freezing mark across some of our far north/northeast counties.
1018 AM MDT Mon Oct 30 2023 Key Messages: - Near-advisory criteria winds today - Spotty light flurries possible late today and tonight - Temperatures warming to near-seasonable levels this week A deep upper trough axis extends from northern Ontario southwestward through the Midwest into the far SW US with brisk, northwesterly flow aloft over the Northern Plains and Northern Rockies.
Unseasonably cool temperatures will persist today with northerly flow aloft along the periphery of an upper level ridge. Dry and calm conditions will continue into tomorrow as the ridge moves overhead, and temperatures will begin to moderate.
(This evening through Tuesday night) Benign weather continues through the period as dry northwest flow aloft and high pressure take over. Temperatures will top out in the mid 40s today, and warm into the low 50s tomorrow.
252 PM MDT Mon Oct 30 2023 Key Messages: 1) Another cold night tonight, then slightly warmer tomorrow. Dry and cold northwest flow aloft this evening will relax as a relatively flat ridge of high pressure starts to build into the Desert SW on Tuesday. Plan on mainly clear skies and light winds across the entire area through the short term, with another cold night on tap for tonight, then slightly warmer tomorrow. Overnight minimum temps tonight are forecast to be 5 to 15F for the high valleys, and in the teens for the plains. the upper pattern will feature a longwave trough across the eastern conus, and an upper ridge along the West Coast.
An area of high pressure will continue to dominate the region through the first half of the week.
145 PM PDT Mon Oct 30 2023 A gradual warming trend continues for the remainder of the week with mostly dry conditions prevailing as high pressure builds over the region. Looking at the large scale pattern, ensembles are in solid agreement that high pressure ridge will begin to expand across the western U.
Clear skies prevail over the area on satellite imagery today, as the high pressure ridge continues over NorCal. Temperatures are expected to reach the low to mid 70s today in the Valley, with highs generally 2 to 10 degrees cooler than yesterday.
Water vapor imagery is highlighting a plethora of features, including a TUTT cell near the Yucatan Peninsula, an area of low pressure near the northwestern Bahamas, and a front draped across the Appalachians through the western Gulf. Temperatures are generally in the lower to mid 80s, with the lower temperatures being seen in the Lower Keys where cloud cover is more abundant. As the front across the Southeast slides southward, it will steer the area of low pressure near the northern Bahamas to the north to northeast away from land.
Areas of snow showers are pinwheeling around the upper low and visibilities are being reduced to 3/4 to 1/2 mile in some instances over northeast ND, indicating some brief intense bursts/snow squalls. Periods of snow will continue through early Tuesday morning before the low pulls away to the southeast.
Again Halloween evening, the clear sky/dry air regime will allow temperatures to fall quickly after sunset, down to freezing by 8-9pm.
210 PM MDT Mon Oct 30 2023 Weak cold front will exit the area tonight so the gusty winds and blowing snow associated with the front will subside this evening. Some patchy freezing fog may be possible towards morning, mainly in Garfield and McCone Counties.
1228 PM CDT Mon Oct 30 2023 (Today through Tuesday) Big changes in store for Alabama today as a strong cold front pushes through the area. Behind the front, northwest winds at 10-15 mph will usher in much cooler air, with temperatures falling into the 50s for areas north of I-59 by mid afternoon. Temperatures will warm quickly south of the cold front, with readings climbing into 70s and lower 80s along and southeast of the I-85 corridor.
(18Z TAFS) A cold front currently near the I-65 corridor continues through the remainder of the area with a northerly flow near 10 knots following in the wake of the front. /29 (Now through Tuesday) A large positively tilted upper trof located mostly over the central CONUS takes on a somewhat more meridional orientation while progressing into the eastern half of the CONUS through Tuesday. Highs on Tuesday will be in the upper 50s to lower 60s along and west of I-65 and in the lower to mid 60s further to the east.
(Tonight) A cold front has now exited northeast AL and all areas are experiencing steady or slowly falling temperatures. This will prevent freezing temperatures for nearly all areas tonight, except for far northwest AL and northwest portions of southern middle TN.
1119 AM MDT Mon Oct 30 2023 Today and Tonight: Isolated snow showers are likely to continue today, mainly near the North Dakota border as a back door cold front swings in from eastern Saskatchewan. Also of note is patchy freezing fog early this morning evident on satellite microphysics that is focused over Valley county and extending into the Missouri River Valley to the east. One more frigid night for this time of year with some below zero readings will result tonight from the cold front, though limited by cloud cover especially toward the west.
(Tonight through Tuesday night) Key Messages: - Gusty winds continue - Chilly low temperatures, with wind chills near freezing Tuesday night Isolated to scattered showers will continue tonight and early Tuesday before coming to an end Tuesday afternoon and evening. Cool temperatures will continue through Tuesday night with highs Tuesday will be in the low to mid 50s across the area. The combination of cool low temperatures and elevated north winds will lead to wind chills in the 30s and 40s, with the chilliest conditions across the northern Coastal Plains and Victoria Crossroads on Tuesday night when Wind Chills will be around freezing.
1100 AM MDT Mon Oct 30 2023 Temperatures across the Grand Valley as well as the valleys of east-central and southeast Utah have all risen above freezing over the last hour. Expect temperatures to warm back up above freezing or at least above the hard freeze within the next hour or two. Tonight should be another chilly night, but warmer than this morning by a few degrees. An amplified ridge over the West Coast will drift eastward over the next several days, and help modify the air mass so expect temps to warm gradually this week. By mid week a trough moves into the Pacific Northwest.
Longwave high pressure will maintain dominant synoptic control of our weather over the next several days, with absolutely no concerns for anything impactful.
1150 AM CDT Mon Oct 30 2023 (Today and tonight) Most of northern and western Oklahoma are below freezing already this morning and the freeze will likely be widespread enough and cold enough that we can count this is the first significant freeze of the season and no further Freeze Warnings will be necessary. Farther south though, the clouds held on long enough this morning that while some areas are down to freezing, it is not as widespread of cold as farther north.
1239 PM CDT Mon Oct 30 2023 (Today through Tuesday Night ) The upper trough is in the Plains and moving southeast as southwest flow continues in the south and east sections of the country. This upper trough will move through Arkansas this afternoon and overnight. The high is originating from Canada and will bring cold dry air. Two counties in the southeast may not reach freezing tonight so a Frost Advisory has been issued for Drew and Desha counties. Highs today will be in the lower 40s to lower 50s and Tuesday will be in the mid 40s to mid 50s.
1217 PM EDT Mon Oct 30 2023 Low pressure will track south of the area today then continue south of Nova Scotia tonight.
(This evening through Tuesday) A highly amplified ridge of high pressure remains over the region. While warmer than the previous nights, the temperatures will quickly cool to the lower 50s near the coast/bays, 40s in the interior valleys, to the upper 30s in isolated pockets.
301 PM EDT Mon Oct 30 2023 Light rain will taper off through the evening as low pressure exits the region.
344 PM EDT Mon Oct 30 2023 Sub-freezing temperatures are expected during the overnight hours.
(This afternoon through Tuesday Night) The cold front has passed entirely through Middle Tennessee, and we are left with some lingering rain and definitely colder temperatures.
356 PM EDT Mon Oct 30 2023 Widespread precipitation will continue to taper off this evening, with mostly dry conditions in store for Tuesday as high pressure builds in. Drier air behind a weak cold front dropping through the region will help erode lingering cloud cover and showers. Temperatures tonight will drop into the 20s across most of the region, although locations near Lake Champlain may stay near or above freezing. Heading into Tuesday, high pressure ridging looks to build in, bringing dry yet chilly weather to the region. Skies will be mostly clear, although daytime high temperatures will range in the low 30s to low 40s, with even cooler temperatures in the mountains.
High pressure will bring a warming trend to the region through the week.
Key Messages: - Advisory level winds for some areas in western SD today - Light flurries possible the latter half of today - A gradual warm-up expected over the week Current Water Vapor and upper air analysis show the trough axis extending from the Hudson Bay region southwest through the south central plains.
1047 PM EDT Mon Oct 30 2023 Sub-freezing temperatures are expected during the overnight hours.
Temperatures will fall to or below freezing across a good portion of the region tonight, mainly north and west of the Metroplex where a Freeze Warning is in effect. North winds will continue though so it'll feel a little cooler. Almost all of North and Central Texas will fall to below freezing Tuesday night.
803 PM EDT Mon Oct 30 2023 Sub-freezing temperatures are expected during the overnight hours.
Only change of substance for now is to increase the winds over the mountain ridges a little. Concerning temperatures, lows tonight should be 1-4 C warmer then this morning's lows. Tuesday high should be 3-6 C warmer than today's highs. Northwest flow aloft will continue for the upcoming week and into the weekend as a large trough remains over the eastern part of North America and with ridging along the Pacific coast.
Northeast winds will remain gusty for locations downslope (southwest) of the high terrain, but winds tonight are on track to stay lighter than they were last night. High temperatures have been 10-15 degrees cooler than average for late October. Overall pressure gradients are weaker tonight compared to last night, so wind speeds in the downslope areas south of the Mogollon Rim and Bradshaw Mountains will be lighter with the highest gusts around 30 mph.
This will set the stage for freezing temps in many areas along with some patches of frost.
609 PM CDT Mon Oct 30 2023 (Tonight through Tuesday night) As the upper-level trough that was responsible for this mornings cold front moves further east, strong northerly flow will continue to bring cooler air to Deep South Texas. Temperatures will continue to fall overnight, with lows reaching the low to mid 40s.
610 PM CDT Mon Oct 30 2023 (Tonight) A cold front has now exited northeast AL and all areas are experiencing steady or slowly falling temperatures. This will prevent freezing temperatures for nearly all areas tonight, except for far northwest AL and northwest portions of southern middle TN.
520 PM MDT Mon Oct 30 2023 Key Messages: - Advisory level winds for some areas in western SD today - Light flurries possible the latter half of today - A gradual warm-up expected over the week Current Water Vapor and upper air analysis show the trough axis extending from the Hudson Bay region southwest through the south central plains.
622 PM CDT Mon Oct 30 2023 (This afternoon through Tuesday Night) The cold front has passed entirely through Middle Tennessee, and we are left with some lingering rain and definitely colder temperatures.
610 PM CDT Mon Oct 30 2023 (This evening through Tuesday night) Benign weather continues through the period as dry northwest flow aloft and high pressure take over. Temperatures will top out in the mid 40s today, and warm into the low 50s tomorrow.
458 PM MDT Mon Oct 30 2023 Latest upper air analysis shows northwest flow over the High Plains. At the surface a weak cold front is seen approaching South Dakota. Meanwhile temperatures will be a little cooler than yesterday, especially over the eastern part of the forecast area. There will be several cold front passages. The upper level ridge continues to dominate the weather pattern over the western CONUS.
Late this afternoon and this evening, it was partly cloudy and wet across the Lower Keys due to a Tropical Upper Tropospheric Trough (TUTT) near the Yucatan Peninsula and significant low level moisture just below the daily max of 2. The dry air at 950 MB and 850 MB is keeping showers from becoming more robust over the Lower Keys. Although showers continue to move over the Lower Keys MRMS, 3-hour rainfall accumulations ranged from 0. Before the clouds set in over the Lower Keys, Key West International Airport reached a high of 87 degrees, while Marathon International Airport recorded a temperature of 85 degrees.
/EC/ Tuesday night through the end of week: Colder air will advect into the area for mid week bringing the potential for below freezing lows through midweek. Freeze warning/watch products have been issued for Tuesday night as low temperatures will be in the low 30s with the possibility of some 20s to be scattered in northern portions of our CWA. Wind gusts around 15-20 kts will drop wind chill values to the lower 20s with some areas seeing teens.
Ridging remains in place aloft this afternoon while at the surface, high pressure north of the area extends across the state as a low spins near the Bahamas. Winds become more northeast and north tonight into Tuesday as the low over the Bahamas slowly moves away from Florida.
524 PM MDT Mon Oct 30 2023 Cool temperatures today with highs barely breaching freezing in some points. As the upper level ridge shifts eastward tomorrow, temperatures will increase closer to near-normal and winds will turn westerly.
A few locations in southern mid TN/NW AL may drop to freezing prior to daybreak, but this should only be for a couple of hrs and not be widespread enough to warrant a Freeze Warning.
By Tuesday evening, another cold front will impact the Mid-South, reinforcing the cool and dry air already in place.