Aikyam-Lab/Synoptic-Bench huggingface dataset:
The cooler waters of Florida Bay have decoupled the BL winds, at least according to Whipray which is near 15 knots or less. Temperatures are in the lower 70s and should easily reach the upper 70s this afternoon. Dewpoints have increased to the lower 60s, although humidity remains comfortable for our standards.
1002 AM MST Sun Feb 23 2020 Current sfc analysis shows a cold front progressing sewd across the wrn SD plains, with nwly flow over nwrn SD and W/SW flow elsewhere. Temps are not appreciably cooler behind the front, with 30s still observed across ern MT/wrn ND. Some cirrus is streaming across our srn tier as an upper low begins to impinge upon the srn stream ridging that has been in place the last couple of days. The srn stream upper low should remain to our south today.
Temperatures are running a little warmer than originally thought, so I've bumped afternoon highs just a little, but this still leaves everybody solidly in the 50s.
244 PM EST Sun Feb 23 2020 Synopsis/Discussion/Marine - Winter weather is back in the forecast - Monday will be the warmest day of the period -- Winter weather is back in the forecast -- Two waves of low pressure are heading for the Great Lakes. The second wave is via the northern stream and will quickly carve out a deep upper trough over the central US.
Given cloud cover and rainfall, temperatures reside in the lower 40s tonight. By Monday morning, rain chances increase due to a front stemming from the low pressure system moving from the lower Plains into the lower Great Lakes region.
1130 AM CST Sun Feb 23 2020 A cold front passes across the area today and brings a switch to brisk northwest winds.
Will continue the High Wind Warning for the Guadalupe Mountains until midnight MST. Another day of above normal temperatures is expected Monday as a new surface lee low/trough forms in northwest flow aloft. Another upper level storm system will pass by to the north and drag a dry cold front through the forecast area Monday night.
Temperatures will still manage to creep into the 80s by mid Monday afternoon, slowed primarily only across the ranchlands, where cooler air will be offset by a mix of clouds and sun, as opposed to cloudier skies expected farther east.
358 PM EST Sun Feb 23 2020 High pressure will persist through tonight. A warm front will lift north of the region on Monday, followed by a pair of cold fronts during the middle of the week.
Clouds are spreading into the region from the northwest this morning, ahead of an upper level system that will drive a cold front through the region later today. Still expecting 1 to 3 inches of snow above around 5000 feet, with just a few hundredths of rain in the lower elevations. Areas of MVFR and local IFR with mountain obscuration associated with a cold front crossing the region this afternoon. Surface winds: generally SE 5-15 kts, becoming W to NW 10-20 kts behind the cold front with gusts up to 35 kts.
The next disturbance will bring a cold front through much of the state early Monday. High pressure will build into the region for the remainder of the coming week. However, as the higher clouds aloft move out, the fog and stratus is expected to rapidly dissipate by midday. A fast moving weak cold front will bring some snow and wind to northern Utah and southwest Wyoming late tonight into Monday and into the central mountains by Monday morning.
224 PM CST Sun Feb 23 2020 The upper level low was currently on the border of Colorado and New Mexico slowly moving east. The center of this low will still be over the Panhandles this evening and will be slow to advance eastward through the nighttime hours. Surface winds will remain highest in closest proximity to the low which will generally be in the extreme southern Texas Panhandle shifting to the extreme southeastern Texas Panhandle by Monday morning. Although a cold front will move through Sunday evening, weak surface cyclogenesis will occur in northeastern New Mexico on Monday. A stronger cold front will move through the region Monday evening.
1146 AM CST Sun Feb 23 2020 A change is in the air as a cold front is expected to move across the forecast area. As of 08Z, cold front is working into the far northwestern portions of South Dakota. Cold front is expected to work south today leading to cooler temperatures and breezy northwest winds developing. Temperatures will still be relatively mild south of I-90 as cooler air will take the better part of the day before settling in. Clouds and winds will be on the increase on Monday as upper level trough approaches from the west and pressure gradient increases across the plains.
Across the lower elevations impacts from this line don't look to have nearly as much of an impact as a 1-2 hour period of rain and/or snow is likely including a slight chance for a very brief period of freezing rain around Idaho Falls and Blackfoot as the front moves through but again overall impacts should be limited. As the week progresses, models build a high pressure ridge over the region allowing temperatures to begin to moderate.
Current satellite and upper-air analysis shows the low pressure system that brought widespread rain and snow to northern Arizona has moved into Colorado and New Mexico.
VFR conditions will prevail next 24 hours, as an upper-lvl trough passes thru the region. Will continue the High Wind Warning for the Guadalupe Mountains until midnight MST. Another day of above normal temperatures is expected Monday as a new surface lee low/trough forms in northwest flow aloft. Another upper level storm system will pass by to the north and drag a dry cold front through the forecast area Monday night.
308 PM MST Sun Feb 23 2020 The low pressure center seemed to have an extremely delayed intensification period and is intensifying further east which caused generally dry conditions over the I-25 corridor, but snowfall is still being observed over the mountains. The low pressure center is still expected to intensify, and will continue to bring rain over the eastern plains during the overnight hours. Tomorrow afternoon, a cold front associated with a low pressure center located to the northeast of Colorado will pass overhead bringing cloud cover and an isolated snow shower to the eastern plains.
By monday morning a low pressure system will be north of the region but will open up and lift to the northeast and this will drag a cold front through our area. Winds also have the potential to become gusty between the morning and afternoon time frame due to a longwave trough with a tight pressure gradient that will begin to swing across the state Monday. The cold front is expected to push through the area Monday evening bringing in come cooler and dry weather behind it for the coming days.
A short wave ridge will bring drier and more stable conditions to the region through midnight.
It will still take a few more hours to moisten the low levels enough for cigs to fall below VFR.
The trough will continue moving east this afternoon. An upper level trough will move east from the Rockies into the western Plains on Monday. While precipitation associated with this trough will remain to the south, increasing mid and upper level moisture will cause cloud cover to increase through the day Monday, generally from west to east. Warm temperatures will continue Monday, with the highest temperatures approaching 40 degrees in northwest Wisconsin. North to northeasterly flow will develop Monday night as the upper level trough moves into Iowa. Cooler air will filter in from Ontario, and this will bring a chance for some light lake-effect snow showers late Monday night, mainly for the South Shore but possibly extending into the Twin Ports.
345 PM CST Sun Feb 23 2020 Mid-afternoon sfc analysis shows high pressure centered along the srn Atlantic coast ridging wswwd with a resultant srly low-level flow maintaining a much moister airmass across the forecast area at this time. Water vapor imagery shows ridging now moving east of the forecast area with our next mid/upper-level storm system moving out of the Rockies. The developing nrly flow behind the front will usher in a brief shot of cooler temps tomorrow night with wake up temps Mardi Gras morning ranging from the mid 40s to the lower 50s for all but the immediate coast/extreme lower Acadiana.
A return to near normal temperatures is likely early this week, followed by a warming trend later in the week as high pressure builds across the intermountain West. The low pressure system that brought the widespread rainfall to the area has moved into the southern Rockies. In the wake of this system, conditions are quite chilly across the region with temperatures struggling to climb through the lower 60s across the lower deserts. Meanwhile, the lower levels remain relatively moist with surface dewpoints in the 40s. Numerous vort maxes are evident on water vapor imagery within the larger upper low. A ridge will build along the west coast early this week and high temperatures will recover into lower 70s tomorrow.
Winds will begin to veer around to the sw and w as a cold front moves through the day Monday. /Tonight through Monday Night/ An upper-level trough approaching the region from the west will be the main feature driving the forecast in the near term. A trailing cold front will swing across the region on Monday with conditions improving from the west. Temperatures overnight to fall into the 50s ahead of the cold front. All locations forecast to fall into the lower 40s on Monday night as high pressure rebuilds across the region.
341 PM CST Sun Feb 23 2020 Cooler air has begun moving into the region this evening as a Canadian high pressure slides southward. The diffuse cold frontal passage overnight will knock temperatures back down to near seasonal normals for Monday.
615 PM EST Sun Feb 23 2020 VFR prevails during the next 24 hours at all terminals with high pressure well in control of the area. High temperatures will range from the upper 70s along the east coast to the lower 80s across the interior sections.
731 PM EST Sun Feb 23 2020 Marine - Winter weather is back in the forecast - Monday will be the warmest day of the period -- Winter weather is back in the forecast -- Two waves of low pressure are heading for the Great Lakes. The second wave is via the northern stream and will quickly carve out a deep upper trough over the central US.
639 PM EST Sun Feb 23 2020 Aviation - Winter weather is back in the forecast - Monday will be the warmest day of the period -- Winter weather is back in the forecast -- Two waves of low pressure are heading for the Great Lakes. The second wave is via the northern stream and will quickly carve out a deep upper trough over the central US.
Low temperatures tonight will be warmer than normal, ranging from the mid 40s to the mid 50s. By monday morning a low pressure system will be north of the region but will open up and lift to the northeast and this will drag a cold front through our area. Winds also have the potential to become gusty between the morning and afternoon time frame due to a longwave trough with a tight pressure gradient that will begin to swing across the state Monday. The cold front is expected to push through the area Monday evening bringing in come cooler and dry weather behind it for the coming days.
257 PM MST Sun Feb 23 2020 A return to near normal temperatures is likely early this week, followed by a warming trend later in the week as high pressure builds across the intermountain West. The low pressure system that brought the widespread rainfall to the area has moved into the southern Rockies. In the wake of this system, conditions are quite chilly across the region with temperatures struggling to climb through the lower 60s across the lower deserts. Meanwhile, the lower levels remain relatively moist with surface dewpoints in the 40s. Numerous vort maxes are evident on water vapor imagery within the larger upper low. A ridge will build along the west coast early this week and high temperatures will recover into lower 70s tomorrow.
Cooler temperatures today with temperatures running 5 to 10 degrees lower than yesterdays values at 2 pm.
Drier and cooler conditions expected Monday night.
307 PM MST Sun Feb 23 2020 The low pressure center seemed to have an extremely delayed intensification period and is intensifying further east which caused generally dry conditions over the I-25 corridor, but snowfall is still being observed over the mountains. The low pressure center is still expected to intensify, and will continue to bring rain over the eastern plains during the overnight hours. Tomorrow afternoon, a cold front associated with a low pressure center located to the northeast of Colorado will pass overhead bringing cloud cover and an isolated snow shower to the eastern plains.
Dry and warmer conditions will return throughout most of the week as high pressure builds over the state.
Winds will slowly decrease this evening, but will stay solidly breezy, as a cold front moves through the region late tonight and shifts the winds to the northwest. /issued 224 PM CST Sun Feb 23 2020/ The upper level low was currently on the border of Colorado and New Mexico slowly moving east. The center of this low will still be over the Panhandles this evening and will be slow to advance eastward through the nighttime hours. Surface winds will remain highest in closest proximity to the low which will generally be in the extreme southern Texas Panhandle shifting to the extreme southeastern Texas Panhandle by Monday morning. Although a cold front will move through Sunday evening, weak surface cyclogenesis will occur in northeastern New Mexico on Monday. A stronger cold front will move through the region Monday evening.
STRONG COLD FRONT ACCOMPANIED BY WIND GUSTS TO 40 MPH AND BRIEF. SIGNIFICANT SNOW BANDS POSSIBLE ACROSS WESTERN MONTANA LATER A powerful Pacific cold front will move across the Northern Rockies this afternoon and evening, producing intense snowfall and wind gusts up to 40 mph. Snow showers behind the cold front are anticipated to organize from northwest to southeast in possibly intense banded snow features.
Another cold front Monday will bring surface winds from the west and northwest, with possible gusts around 20 knots, beginning around 18Z Monday. /issued 247 PM CST Sun Feb 23 2020/ (Tonight and Monday) An upper level trough will swing across the Texas Panhandle and Oklahoma overnight, sending a Pacific front through West Central Texas. Mild conditions are forecast on Monday behind the weak cold front.
Winds aloft will also come up as the trough passes, so higher elevations may see blowing snow either side of midnight, impacting the main mountain passes. As the main push of the trough passes across the state Monday morning, winds will begin to increase across both Sweetwater County and Johnson County, bringing winter impacts to all three main Interstates. The biggest impact of those looks to be I-90 across Johnson County, as winds will be more perpendicular to the highway.
A disturbance in NW flow aloft will bring a cold front across northern Utah tonight and through remainder of the state by Monday afternoon.
Mild temps once again this afternoon despite the weak cold front passage, helped by lots of sunshine. Main focus will be on the closed trough expected to migrate from Montana across western ND and eventually into South Dakota. Main mid/upper low track is still west of our CWA limiting larger scale synoptic forcing/moisture advection.
544 PM CST Sun Feb 23 2020 Cooler air has begun moving into the region this evening as a Canadian high pressure slides southward. The diffuse cold frontal passage overnight will knock temperatures back down to near seasonal normals for Monday.
After a brief cool down tomorrow due to a weak cold front passing through, dry and warmer conditions expected the rest of the week, with many areas hitting 60 or better.
654 PM EST Sun Feb 23 2020 High pressure will maintain dry weather today. Rain returns tomorrow with a crossing low pressure system. With prevailing southwest flow, temperatures should remain above freezing overnight for the bulk of the region. The approaching low pressure system is expected to weaken early Monday morning over the Mississippi River before advancing into the Great Lakes.
Expect areas along and north of I-20 to be covered in rain by sunrise Monday as lift increases ahead of an advancing short wave trof. Reduced rain chances for areas south of I-20 overnight as low level ridging keeps most of the rain across north Alabama.
Increased low level moisture today will mean a little warmer temperatures tonight compared to the last couple of nights. High temperatures will reach the 70s with a slight chance of late day showers over interior se Ga near a developing warm front.
A low pressure system is expected to affect the area starting tonight, and lingering into the midweek period. In the wake of this system, high pressure is expected to move into the area for the later parts of the week. Previous discussion Models suggest an upper low, currently over the southern Rockies, will move into the southern Plains by sunrise Monday.
340 PM CST Sun Feb 23 2020 - Cold front tomorrow morning still on track with a chance of showers and perhaps an isolated storm.
348 PM CST Sun Feb 23 2020 Cooler air has begun moving into the region this evening as a Canadian high pressure slides southward. The diffuse cold frontal passage overnight will knock temperatures back down to near seasonal normals for Monday.
Temperatures should be steady or will slowly drop into the lower to middle 40s as precipitation develops and becomes more persistent. By Monday morning, rain chances increase due to a front stemming from the low pressure system moving from the lower Plains into the lower Great Lakes region.
207 PM MST Sun Feb 23 2020 One upper low spins over the Four Corners, while another moves ashore over British Columbia. Surface map shows high pressure pushing into the region. Winds will turn southerly this evening, becoming breezy between the departing high pressure and the incoming low.
Closed low over the four corners region this morning continues to track east and will be the impetus of some potential precipitation for our north central Kansas counties tonight.
409 PM MST Sun Feb 23 2020 One upper low spins over the Four Corners, while another moves ashore over British Columbia. Surface map shows high pressure pushing into the region. Winds will turn southerly this evening, becoming breezy between the departing high pressure and the incoming low.
/Tonight through Monday Night/ An upper-level trough approaching the region from the west will be the main feature driving the forecast in the near term. A trailing cold front will swing across the region on Monday with conditions improving from the west. Temperatures overnight to fall into the 50s ahead of the cold front. All locations forecast to fall into the lower 40s on Monday night as high pressure rebuilds across the region.
628 PM EST Sun Feb 23 2020 High pressure exits tonight. Warm front lift north Monday.
115 AM EST Mon Feb 24 2020 - Winter weather is back in the forecast - Monday will be the warmest day of the period -- Winter weather is back in the forecast -- Two waves of low pressure are heading for the Great Lakes. The second wave is via the northern stream and will quickly carve out a deep upper trough over the central US.
1057 PM CST Sun Feb 23 2020 Cooler air has begun moving into the region this evening as a Canadian high pressure slides southward. The diffuse cold frontal passage overnight will knock temperatures back down to near seasonal normals for Monday.
A cold front moves in the Big Country late evening, moving along I- 20, 10 PM to Midnight, and through the rest of the region by morning.
1104 PM EST Sun Feb 23 2020 High pressure will maintain dry weather through part of Monday. Rain returns later tomorrow with a crossing low pressure system. The approaching low pressure system is expected to weaken early Monday morning over the Mississippi River before advancing into the Great Lakes.
1042 PM MST Sun Feb 23 2020 One upper low spins over the Four Corners, while another moves ashore over British Columbia. Surface map shows high pressure pushing into the region. Winds will turn southerly this evening, becoming breezy between the departing high pressure and the incoming low.
The Evening Update: Nly gradients beginning to increase this evening as the dry cold front moves over Norcal. JHM Cooler temperatures today with temperatures running 5 to 10 degrees lower than yesterdays values at 2 pm.
Current upper ridging will slowly give way to falling heights over the next 12-18 hours as a potent MLC strengthens over the southern plains, which will drive moisture advection and eventually a fropa through the southern Appalachian region. Likewise, temperature profiles across the higher peaks/ridgetops tonight combined with incoming moisture could yield a few hours of snow showers above 4500ft, with little/no accumulation expected. LW Chattanooga Airport, TN 43 52 50 62 42 / 50 100 100 10 20 Knoxville McGhee Tyson Airport, TN 42 50 47 63 43 / 40 100 100 10 10 Oak Ridge, TN 41 49 47 62 42 / 50 100 100 20 20 Tri Cities Airport, TN 37 48 44 62 42 / 40 100 90 20 10.
931 PM MST Sun Feb 23 2020 Light snow shower coverage has pretty much ended this evening over the area as the upper trough continues to exit the region to the east. With fairly wide dew point spreads across the lower elevations, no real threat for fog is expected over the areas which received snow today. After the current calm and stable ridge axis passes over the region around 12z, will expect windy conditions to eventually develop across northern Colorado. A short wave ridge will bring drier and more stable conditions to the region through midnight.
252 AM CST Mon Feb 24 2020 Area of light to moderate rainfall will continue to pinwheel around the upper low as it moves from south central across southeast Kansas this morning.
254 AM CST Mon Feb 24 2020 Early morning satellite imagery detected the upper cyclone across northwest OK, with a pronounced dry slot noted across a good portion of the forecast area. The better rain chances will remain near the OK/KS and MO/AR borders this morning as the upper system tracks east-northeast, with scattered light showers/drizzle south of the low.
Upper low continues to push east, and showers across the plains this evening have been brief. Moore The low pressure center seemed to have an extremely delayed intensification period and is intensifying further east which caused generally dry conditions over the I-25 corridor, but snowfall is still being observed over the mountains. The low pressure center is still expected to intensify, and will continue to bring rain over the eastern plains during the overnight hours. Tomorrow afternoon, a cold front associated with a low pressure center located to the northeast of Colorado will pass overhead bringing cloud cover and an isolated snow shower to the eastern plains.
Low pressure is currently centered over the northeast corner of the Texas Panhandle. As this low continues to move east across northern Oklahoma, more rain across the region overnight. Southerly winds on the back side of high pressure have allowed surface dewpoints to recover into the lower 40s. Rain chances will begin to gradually taper off Monday night as a cold front pushes through the Lower Mississippi Valley.
Lift across a warm front to our south should help support continued development. a strong upper low will move across the mid MS Valley today into the OH Valley overnight. This will bring a surface cold front into north GA late tonight. and as the warm front drifts northward.
VFR conditions will prevail next 24 hours, as an upper-lvl trough exits the region. Will continue the High Wind Warning for the Guadalupe Mountains until midnight MST. Another day of above normal temperatures is expected Monday as a new surface lee low/trough forms in northwest flow aloft. Another upper level storm system will pass by to the north and drag a dry cold front through the forecast area Monday night.