Aikyam-Lab/Synoptic-Bench huggingface dataset:
619 AM CDT Mon Apr 19 2021 Latest 08z surface analysis shows cold front extending from Lake Superior to central Iowa. This cold front was producing a band of rain showers from eastern Wisconsin into northern Iowa per latest mosaic radar. Behind cold front temperatures have fallen into the middle 30s to lower 40s across the forecast area per latest metars. Surface cold front tracks south of the forecast area today and an unseasonably cold airmass will advect into the region. upper level low is expected to track into the southern Ontario Canada/Upper Great Lakes region. First impulse rotating around the upper level low will move over the forecast area this afternoon/evening.
658 AM EDT Mon Apr 19 2021 A dying cold front will push into northwest Pennsylvania tonight, then stall out over the northern part of the state on Tuesday.
/Issued 740 AM EDT Mon Apr 19 2021/ An upper trough will cross the OH Valley this morning and into the early afternoon. In the wake of this trough. An upper ridge will build over the forecast area through tonight. The upper flow will become more west to southwest on Tuesday as a low pressure area moves along the Gulf.
631 AM EDT Mon Apr 19 2021 [Through 12Z Tuesday] A cold front will shift southeast of the region this morning.
Cold front will move into NE OK after 00z, likely reaching KBVO around 03z and KTUL/KRVS 05z with strong gusty north winds and MVFR ceilings spreading south behind the front through 12z Tuesday. /Issued 253 AM CDT Mon Apr 19 2021/ A fast-moving/strong cold front was currently pushing into southern NE and will be across southern KS later today. The warmup will be short-lived as the cold front will dip into northeast OK late Monday night and sweep through the entire forecast area later Tuesday. Latest data suggests that temps could briefly dip into the mid 30s Tuesday morning as the precipitation increases, with a rain/snow mix still possible across parts of northeast OK and perhaps into the higher terrain of northwest AR.
741 AM EDT Mon Apr 19 2021 Dry and warmer weather expected until rain, snow, and much cooler temperatures return midweek with crossing low pressure. Weak ridging at the surface and aloft will provide dry weather.
We will be slightly warmer for the next 24 hours, both low and high with light southerly winds. Although the next cold front will be shifting the winds back to NW Tuesday afternoon and may keep a lid on mid to upper 60s for our I-30 corridor tomorrow, but everywhere else should see a warmer day with warm southwest winds boosting the temps into the mid to a few upper 70s right ahead of the front.
A cold front, now along the Kansas/Nebraska border, will move south today and tonight, entering northwest Oklahoma early this evening. Much cooler air will flow in behind the front, and there will be chances for rain and/or snow, mainly over the northern half of Oklahoma.
Cooler Tuesday with the chance of mainly mountain showers and thunderstorms.
434 AM PDT Mon Apr 19 2021 Warmer inland today with well above average high temperatures while the immediate coast begins to cool.
The next two days will be very pleasant with plenty of sunshine and temperatures striving for 70 today and reaching the lower to mid 70s on Tuesday. Southwest winds will begin to increase on Tuesday ahead of our next system that is poised to bring much cooler air into the region. A surface cold front will move through Tuesday night bringing some light showers mainly after midnight.
A drop in the freezing level will maintain the threat for small hail, however the focus for activity will continue to be strong winds, frequent lightning and heavy rain. Dense cloud cover will limit temps a bit this afternoon, reaching the upper 70s from Orlando north, to the low to mid 80s south.
1224 PM CDT Mon Apr 19 2021 (Today and tonight) An upper level low/trough is centered across northern Mexico and will track across far West Texas today, then across West Central Texas overnight. Overnight low temperatures will be in the low to mid 40s. A strong cold front will approach the northern Big Country around daybreak, resulting in gusty north winds of 15 to 20 mph.
Currently, long wave trough remains across much of North America today.
1145 AM CDT Mon Apr 19 2021 Latest 08z surface analysis shows cold front extending from Lake Superior to central Iowa. This cold front was producing a band of rain showers from eastern Wisconsin into northern Iowa per latest mosaic radar. Behind cold front temperatures have fallen into the middle 30s to lower 40s across the forecast area per latest metars. Surface cold front tracks south of the forecast area today and an unseasonably cold airmass will advect into the region. upper level low is expected to track into the southern Ontario Canada/Upper Great Lakes region. First impulse rotating around the upper level low will move over the forecast area this afternoon/evening.
Meanwhile, a unseasonably strong cold front, that is currently being analyzed to be across southern Kansas, will be approaching our northern zones by midday Tuesday. Temperatures will fall rapidly behind the cold front, with highs being reached early in the day for our northern zones. The cold front should push through the entire area by Tuesday evening. Model consensus is keeping the area fairly dry as the cold front pushes through on Tuesday. Overnight lows will drop into the lower 30s across our northern zones to the lower 40s across our southern zones.
208 PM CDT Mon Apr 19 2021 It's a puffy cumulus kind-of day across Middle TN with temperatures running around seasonal averages for most everyone (it's a little cooler than average on the Plateau). Tomorrow should be more of the same, though slightly warmer, but clouds should start to increase throughout the day as we sit in anticipation of our next weather maker due in here tomorrow night. Tomorrow night's cold front will be rather strong.
206 PM MDT Mon Apr 19 2021 Water vapor satellite imagery showing an upper level trough diving southeast across the Rockies with strong lift over Wyoming and just entering northern Colorado. This should allow snow to accumulate more quickly since surfaces will be cold and near freezing.
202 PM CDT Mon Apr 19 2021 The mid-level trough axis responsible for scattered SHRA across the Trans Pecos will have moved e by 00Z/Tue leaving mostly clear skies in its wake. Meanwhile a nrn stream mid-level trough and assocd cold front will move quickly s to impact W TX/SE NM Tue AM. The dryline sharpens Fri, thus much warmer/drier especially across the w as a mid-level trough approaches. Timing of the trough does not align with max heating very well and SB instability will be limited to the very far e and far s CWFA so we will continue to downplay PoPs.
Regarding temperatures, we can expect freezing conditions Tuesday morning (morning lows in the upper 20s. Then we can expect more freezing conditions Tuesday night (an additional Freeze Warning has been issued for Tuesday night).
Mostly clear skies and west to southwesterly winds will remain common across the CWA this afternoon ahead of a cold front forecast to reach Northeast Oklahoma around/just after 00z. These conditions were ahead of a southward moving cold front currently stretched west to east generally across Central Kansas into Northeastern Missouri. Conditions today are forecast to be the warmest of the work week as the much anticipated cold front is still slated to reach Northeast Oklahoma this evening.
Temperatures look on track to reach into the lower to mid 70s this afternoon.
A cold front will move into the southern Great Lakes and Ohio Valley later today and cross the Ohio River tonight. TD Chattanooga Airport, TN 47 77 45 58 37 / 0 0 10 0 0 Knoxville McGhee Tyson Airport, TN 44 75 44 54 35 / 0 0 20 10 0 Oak Ridge, TN 43 75 43 54 34 / 0 10 30 10 0 Tri Cities Airport, TN 39 72 42 53 30 / 0 10 20 30 0.
Considerable cloud cover and high rain chances will keep temperatures close to seasonal norms today with highs topping out in the mid to upper 70s north, and around 80 to the lower 80s central and south.
233 PM EDT Mon Apr 19 2021 A dying cold front will push into northwest Pennsylvania tonight, then stall out over the northern part of the state on Tuesday.
327 PM CDT Mon Apr 19 2021 High pressure is currently sitting over the area. The high pressure that gave us a few days of great weather starts to move east. We should start Tuesday off with sunny and dry conditions with temperatures into the low 70s. A strong cold front will approach and cross through Tuesday afternoon into Tuesday evening.
Meanwhile, a cold front has already entered the northwestern CWA, beginning to set the stage for our event tomorrow. The cold front will move all the way through the CWA by midnight tonight, with cold advection ongoing for hours prior to precipitation arriving very late tonight and early Tuesday morning. Colder air moving in aloft and dynamic cooling will cool surface air temperatures into the low to mid 30s as precipitation occurs. Moderate to briefly heavy snow is expected across much of the area (not as intense across the far southern CWA) given large scale forcing from the upper trough and jet structure along with impressive frontogenesis. With warm ground temperatures, air temperatures above freezing, and any solar energy heating the roads, these rates are the key to the impact equation with this event.
(This evening through Tuesday) Skies are gradually trying to clear out this afternoon across the southern half of our forecast area, as an upper low moves into far west Texas. By tonight, this feature will move into central Texas and drag a surface cold front southward with it. However, once the front arrives in the Big Country shortly after sunrise, temperatures there will quickly dip into the low 40s.
The system snow associated with the low passing well to our south continues to look like it will largely miss us to the south. The trough lingers into Tuesday night and will keep some small pops going in the southeast with models generating some very light qpf with a continued signal for higher 925-700 millibar RH values.
Temps will be slightly warmer Tuesday, but still well below normal, with highs in the lower 40s.
218 PM EDT Mon Apr 19 2021 High pressure builds in tonight, remaining through Tuesday.
This is mostly the result of a longwave positively tilted trough remaining over the northern and central plains, keeping the CWA in cold northwesterly flow.
Strong cold front, currently moving through southeast Kansas, will push into northeast Oklahoma this evening, moving to near the I-44 corridor by 12Z Tuesday.
Otherwise temperatures are trending nicely for us to reach our afternoon highs today in the lower 70s. We will be slightly warmer for the next 24 hours, both low and high with light southerly winds. Although the next cold front will be shifting the winds back to NW Tuesday afternoon and may keep a lid on mid to upper 60s for our I-30 corridor tomorrow, but everywhere else should see a warmer day with warm southwest winds boosting the temps into the mid to a few upper 70s right ahead of the front.
These conditions were ahead of a southward moving cold front currently stretched west to east generally across Central Kansas into Northeastern Missouri. Conditions today are forecast to be the warmest of the work week as the much anticipated cold front is still slated to reach Northeast Oklahoma this evening.
257 PM CDT Mon Apr 19 2021 Troughing across the north central CONUS will bring occasional chances for light precip during the short term forecast period, along with cool temperatures. Expect lows to dip into the low to mid 20s, which is around 10 degrees below climatological normals. Max layer wet bulb temperatures look to stay primarily below freezing to yield flurries/snow showers, but a transition to sprinkles/rain showers could occur during the afternoon as the wet bulb temp sneaks to around freezing and surface temps warm into the 40s.
An unseasonably cool airmass will persist across the region through Tuesday with upper troughing residing across the Upper Midwest. Not much change will occur in the overall pattern through mid-week with an upper level trough and associated cool pool of air residing over the area.
A dry cold front continues to push into the region from the north, which will generate gusty winds in the late morning and afternoon today. Any precipitation associated with the cold front will be limited to higher elevations of the Central Idaho Mountains. Temperatures will lower 10 to 15 degrees across the region behind the cold front, returning to near-normal.
Mostly clear skies are expected overnight with temps dropping into the lower 40s in most areas. With a breezy southwest flow, temperatures should be a bit warmer than today. Highs should top out in the 65-70 degree ranges, perhaps slightly warmer down in the Lake Cumberland region.
(This evening through Tuesday) A strong cold front, currently near the Oklahoma and Kansas border, will push quickly southward this evening and overnight. Perhaps, freezing drizzle is more likely or very light freezing rain across northwest Oklahoma (after midnight).
Dry and relatively warm conditions will continue most of this as upper level high pressure remains in place. Onshore flow will slowly strengthen through the week, with increasing cloud cover and cooler temperatures likely the latter half of the week.
Otherwise, no significant changes expected as high pressure settles over the area. The front is well to the southeast of our coastal waters, with high pressure centered over Texas this morning. Low pressure over Lake Superior this morning has a cold front southwest to Colorado.
A thermal trough along the coast will deepen today into Tuesday, bringing the return of gusty north winds and steep to very steep wind driven seas.
A strong cold front is forecast to push across the area on Tuesday afternoon and evening.
A cold front will move into the southern Great Lakes and Ohio Valley later today and cross the Ohio River tonight.
Temperatures will continue to fall near or below freezing by daybreak. Today: Upper troughing continue to sink southward into the Upper Plains will also continue to nudge the best low lvl forcing southward this morning. Temperatures will struggle to reach the 40 degree mark in some locations and climb into the lower 40s in others. Tuesday: Upper troughing deepening on Tuesday, with strong signals for the development of instability based showers by mid-day. Despite surface temperatures rising near or just above 40 degrees, boundary layer dew points remain in the teens, producing sub freezing wet bulb temperatures and making snow showers at 40+ degrees certainly possible.
1111 AM EDT Mon Apr 19 2021 A dying cold front will push into northwest Pennsylvania tonight, then stall out over the northern part of the state on Tuesday.
A strong cold front will traverse the terminals late tonight, after midnight, with gusty northerly winds in its wake. A much stronger short wave will be rotating around a larger trough centered over Ontario. The most notable impact in the near term will be a strong cold front quickly advancing through the region during the pre-dawn hours on Tuesday morning. Freezing temperatures are most likely around the extreme southwestern Texas Panhandle into the northwestern South Plains with additional chances on the caprock. This front will bring a cooler airmass back to the region keeping temperatures in the 50's.
136 PM CDT Mon Apr 19 2021 Summary: Much cooler temperatures expected today in the wake of the cold front that went through yesterday. Look for highs in the lower 40s.
Increasing mid level clouds late tonight could keep lows warmer than expected. Even through high temperatures should reach the lower 40s, buffer soundings, CAM p-type, and HREF all suggest snow showers on Tuesday.
Locally, vertical enhancement in the low level cloud deck on GOES visible imagery lends credence to the potential for some convective enhancement and a showery nature in precip. Soundings also indicate steep lapse rates in the lowest few kilometers and an increased risk for convective enhancement/higher snowfall rates overnight. A jet streak rounding the base of the trough which will move eastward into the Central Plains this evening. Meanwhile, a strong cold front continues to move southward across the Southern Plains.
Fire Danger Statement out today for portions of central and eastern GA where RHs are going to drop this afternoon into the lower to mid 20s.
152 PM MDT Mon Apr 19 2021 Broad trough covers the CONUS, with upper low spinning over the Hudson Bay. With cold high pressure sinking into the region, winds are northerly 10 to 20 kts, and temperatures are in the 20s and 30s.
What an impressive cold front for mid-April yesterday! Snow amounts ranged from several inches along the Continental Divide including 4. Temperatures were struggling to warm much this afternoon across the region and an easterly wind gradient made it feel even cooler. In Idaho, generally low temperatures in the 30s are expected for the lower elevations.
253 PM MDT Mon Apr 19 2021 Thanks to a slowly-departing lobe of the low pressure system from Hudson Bay, widespread intermittent hit- or- miss snow/rain showers are prevalent across the entire CWA today.
1216 PM CDT Mon Apr 19 2021 A strong cold front pushed south across the local area overnight. This front has brought occasionally gusty northerly winds along with noticably cooler temperatures. with most locations reporting wind chills this morning in the lower to mid 20s.
249 PM CDT Mon Apr 19 2021 Well below normal temperatures will be the dominant feature of the forecast through mid-week, with sub-freezing overnight temperatures impacting any sensitive vegetation which has already emerged. Precip type is a little tricky, as away from any showers, temperatures will have the potential to climb into the lower-mid 40s. However, forecast soundings indicate that the sub-cloud layer remains quite dry, leaving plenty of room for evaporative cooling to near or even below freezing throughout most of the day.
Also, occasional ripples in the alto cumulus fields hint at other inversions above the low level inversion. Temperatures across the island chain range from the lower to upper 80s, with dewpoints in the upper 70s. Second, the line of storms over the southeastern Gulf of Mexico should have some southward propagation, building upshear into the Gulf waters north of the Lower and Middle Keys.
The weak, dry cold front that brought periods of breezy conditions and patchy blowing dust last night is exiting the region this morning. Cooler air is filtering into the region behind the frontal passage and will lower afternoon temperatures around 15 degrees cooler than yesterday. Tonight, cooler dry air over the region combined with light winds will allow low temperatures to dip into the lower 30s across much of the forecast area.
Tuesday morning a strong cold front will move through the region between 13Z-16Z. An upper level low currently along the Arizona/U. Right on the heels of the upper low will be an upper trough dropping due south out of Canada and bringing another cold front Tuesday morning. Temperatures behind the front may briefly reach near freezing in northern Lea County Tuesday morning, but clearing skies and lighter winds Tuesday night will bring colder temperatures and a more widespread late season freeze for portions of southeastern New Mexico and the northern Permian Basin.
Increasing cloudiness will keep lows warmer, but still below normals, in the mid-upper 40s north to near 50 degrees in the south. In addition, we should remain dry in the low-levels, so we should be able to mix out again Tuesday. /DC/ Broad troughing encompasses the eastern half of the country. This will result in a cooler weather pattern across the region, more springlike than summerlike.
305 PM CDT Mon Apr 19 2021 A dry cold front will move through our region tonight and settle just southeast of the PAH forecast area. On Tuesday, low pressure will move along the front as an upper level trof moves over the middle Mississippi and lower Ohio valleys.
For 18Z Aviation discussion below Extensive cloud cover in cyclonic flow will be the main story today, along with much cooler temperatures. Despite temperatures in the low to mid 40s, wet bulb temperatures will remain below freezing throughout the column due to inverted V/very dry profiles in the boundary layer. The deep circulation around the upper trough diving southward over the next couple of days, will lead to steep lapse rates which will cause these rain/snow showers. Once the mean trough moves east of our region will temperatures begin to moderate late this week. The week of April 26th looks more unsettled due to the transition to the stronger zonal flow, and possibly a more active pattern as a long wave trough begins to develop across the Rockies, and into the Plains.
As for temperatures, lows tonight look to range from the low 20s across west central Kansas to around 30 degrees across south central Kansas.
A few warmer spots may still reach the lower 40s, but most other locations are probably going to level off with increasing cloud cover (especially in the west). With convective temps in the low to mid 30s skies will CU up this morning with a scattered to broken afternoon expected.
1209 PM MDT Mon Apr 19 2021 The cold front is moving in about 3 hrs faster than most of the guidance showed. With the early passage of the front, temperatures are expected to fall quicker and slightly cooler than previously forecast. High temperatures are expected to range from the mid 30s in our far northern counties to the lower 50s in Greeley and Wichita counties. As mentioned earlier, the snow is expected to move out of the area Tuesday morning as high pressure moves in from the west.
1107 AM PDT Mon Apr 19 2021 Much cooler temperatures will settle in across the Inland Northwest to start the week.
SYNOPSISâ¦ Above normal temperatures will resume today with highs climbing into the low 90s across the lower deserts. Another weather system during the middle of the week will bring a return of somewhat cooler temperatures and increased windy conditions.
647 PM CDT Mon Apr 19 2021 (This evening through Tuesday) Skies are gradually trying to clear out this afternoon across the southern half of our forecast area, as an upper low moves into far west Texas. By tonight, this feature will move into central Texas and drag a surface cold front southward with it. However, once the front arrives in the Big Country shortly after sunrise, temperatures there will quickly dip into the low 40s.
/issued 633 PM CDT Mon Apr 19 2021/ High pressure is currently sitting over the area. The high pressure that gave us a few days of great weather starts to move east. We should start Tuesday off with sunny and dry conditions with temperatures into the low 70s. A strong cold front will approach and cross through Tuesday afternoon into Tuesday evening.
Cold front is currently pushing through the Tulsa metro and will continue to quickly advance southeastward throughout the night.
Above normal temperatures will resume today with highs climbing into the low 90s across the lower deserts. Another weather system during the middle of the week will bring a return of somewhat cooler temperatures and increased windy conditions.
New cells are now forming well southwest of the Lower Keys - also moving swiftly towards the northwest.
This means the higher elevations could be a degree or two warmer than the valleys.
Skies are now clear in Idaho but high clouds were drifting over Oregon ahead of a weak upper low off the Oregon coast.
VFR conditions are expected through most of the period before a cold front impacts the state Tuesday evening/night.
1014 PM EDT Mon Apr 19 2021 High pressure builds in tonight, remaining through Tuesday.
A jet streak rounding the base of the trough which will move eastward into the Central Plains this evening. Meanwhile, a strong cold front continues to move southward across the Southern Plains.