Aikyam-Lab/Synoptic-Bench huggingface dataset:
805 PM CDT Mon Apr 19 2021 (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).
406 PM PDT Mon Apr 19 2021 Near freezing temperatures for many across the region.
A strong cold front will move across the area tonight and Tuesday morning. 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.
445 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.
Otherwise, increasing cloud cover keeps the area a bit warmer tonight than last night and the overnight forecast was only tweaked slightly (<1F average across the area) to better match the observed diurnal trends. 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.
At 02Z, the freezing line is located across Kansas from near Concordia/Smith Center to Scott City to somewhere north of Syracuse. The winds are expected to stay up through the night keeping the lower atmosphere mixed, and the stratus will be rolling in preventing significant radiational cooling. Our forecast is on the cooler side of the guidance envelope which seems reasonable, and the current obs combined with the first look at the 00Z data coming shows the forecast to be in reasonable shape. (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).
228 PM MST Mon Apr 19 2021 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.
Otherwise, a short wave trough coming in from the northwest tonight will bring in more clouds later on. As winds continue to decrease as the inversion strenghtens along with the low dew points, upper teens to the lower 20s look good for overnight lows. 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.
Temperatures tonight will continue to plummet into the teens across most areas with single digits to single digits below zero possible in the higher elevations.
637 PM EDT Mon Apr 19 2021 High pressure builds in tonight, remaining through Tuesday.
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.
Dry and relatively warm conditions will continue most of this week as upper level high pressure remains in place. Onshore flow will slowly strengthen throughout the week, with increasing cloud cover and cooler temperatures likely the latter half of the week.
/issued 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.
237 PM PDT Mon Apr 19 2021 Near freezing temperatures for many across the region.
623 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.
Otherwise, a short wave trough coming in from the northwest tonight will bring in more clouds later on. As winds continue to decrease as the inversion strengthens along with the low dew points, upper teens to the lower 20s look good for overnight lows. 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.
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.
A cold front will move through the area Tuesday morning, w/fropa at KMAF ~ 14Z. /issued 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.
Did notice ob trends were slightly warmer for temperatures, to which guidance was also warmer as well through the overnight. VFR through the period at all sites as high pressure prevails. CDG Chattanooga Airport, TN 48 74 43 57 37 / 0 0 10 0 0 Knoxville McGhee Tyson Airport, TN 46 72 43 53 34 / 0 10 20 10 0 Oak Ridge, TN 45 72 41 53 34 / 0 0 30 10 0 Tri Cities Airport, TN 41 70 42 51 30 / 0 10 20 30 0.
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.
Temperatures will start to rise to the lower 70s by this afternoon before the upcoming front. A strong cold front will push through the area this afternoon and during the evening. Behind the cold front, gusty winds will push much colder air into the region and cloud cover.
300 AM CDT Tue Apr 20 2021 The advertised cold front was currently plowing through the region early this Tuesday morning.
Bit cooler over the next several days, but still warmer than normally expected for mid-April, primarily inland. Cooler weather arrives for the weekend, along with return of clouds and rain.
208 AM MDT Tue Apr 20 2021 Upper trough will linger over eastern Montana today with isolated snow showers mixed at times with rain showers mainly over the SE half of the forecast area.
Unfortunately, not much warming is expected through the day, as 850mb temps remain below 0 deg C, with 925mb temps a couple degrees either side of freezing. Clouds build in today as a wave associated with an upper low over the Great Lakes dives south across our area, with the wave passing over through the afternoon and evening.
1050 PM PDT Mon Apr 19 2021 Cooler Tuesday with the chance of mainly mountain showers and thunderstorms.
1238 AM CDT Tue Apr 20 2021 Cold front currently moving down through the Panhandle expected to arrive at TAF sites in the 12-15z time period. /issued 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.
327 AM CDT Tue Apr 20 2021 Tranquil conditions this morning with just some patchy cloud cover within the persist troughing across the Upper Midwest and northern Plains. Pieces of energy will be rotating through the trough throughout the short term.
Total snowfall amounts will likely range from 3-4 inches along the I-70 corridor, 1-2 inches along the Highway 50 corridor and less than an inch to a dusting farther south toward the Oklahoma border. Temperatures have fallen to below freezing across all of the area except for south central Kansas and expect that area to do the same in the face of steady cold air advection early this morning. In spite of the sunshine, temperatures are only expected to reach the mid 40s to near 50 given the cooler airmass in place.
Temperatures were in the mid- and upper 20s north of Interstate 94 and around freezing elsewhere.
1027 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.
1114 PM CDT Mon Apr 19 2021 (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).
1222 AM CDT Tue Apr 20 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.
Cold front has moved into northeast OK and will move through the remainder of the sites by 12Z. Cold front is currently pushing through the Tulsa metro and will continue to quickly advance southeastward throughout the night.
but a cold front will drop SE into the state during the day on Tue.
(Today and tonight) As of 2 am, a cold front is currently moving south through Childress, TX. With the earlier arrival of the front in the Big Country, expect cool afternoon highs in the low to mid 50s, while the Concho Valley and Heartland will see highs in the upper 50s to upper 60s, and the I-10 corridor will see highs in the low 70s. Gusty and cool north winds of 20-25 mph with gusts of 35-40 mph will occur today behind the cold front.
Main feature of the near term period will be an upper level trough passing through the region this morning/afternoon. Upper level trough axis pushes through tonight with clearing skies expected. Lows will be in the low 50s across AL and in the mid to upper 50s across GA and the FL Big Bend.
927 PM PDT Mon Apr 19 2021 Near freezing temperatures for many across the region.
The highlights are now gone as of 9 PM. Temperatures tonight will continue to plummet into the teens across most areas with single digits to single digits below zero possible in the higher elevations.
250 AM CDT Tue Apr 20 2021 Another quiet night across the mid state tonight as the upper trough over the Plains continues to develop and work its way east toward the region. As the trough and cold front approach, southwest winds will pick up at the surface with very little moisture advection. Temps may be cool enough for some snow to mix in, especially east of I-65, but nothing to get excited about as surface temps should remain above freezing and precip will be mostly rain.
300 AM CDT Tue Apr 20 2021 The cold front has moved through the CWA allowing cooler air to gradually filter into the region. Expect temperatures to be in the mid 30s northwest to the low 40s southeast at the onset of the precipitation. With that being said, there are a few negative factors working against potential of accumulating snowfall including daytime precipitation and above freezing air/road temperatures. As a result, a Winter Weather Advisory is in effect for counties along and north of the Highway 60 corridor for today.
333 AM CDT Tue Apr 20 2021 The calendar might say it's the last half of April, but it will feel a lot like February for most of the area today as a strong cold front brings an unseasonably cold airmass south across the plains this morning. Given temps above freezing any accumulation will remain confined to grassy surfaces at best and would melt very quickly with moderating temps once heavier precip moves out. Widespread sub-freezing temperatures will result given the nature of this airmass and as such have gone ahead with a Freeze Warning for all of eastern OK and western AR tonight.
(Today and tonight) The cold front has moved though the northwestern half of OK already and is still expected to move out of southeastern OK by late morning.
Northerly 500mb flow aloft will bring a weak short wave across the area and when combined with daytime heating widespread scattered snow showers will develop even with temps above freezing as sfc wet bulb temps remain below freezing.
Temps will be slightly warmer Tuesday, but still will below normal, with highs in the lower 40s.
358 AM CDT Tue Apr 20 2021 Latest data suggests that a shallow cold front was making its way through the PAH forecast area already, and should complete its trip by around daybreak, leaving the entire area under a light northerly flow. As the cold air continues to settle in after midnight, freezing temps are now forecast for locations along and north of the OH River and west of the MS River. After a chilly but mostly sunny day Wed, temps are expected to drop again to near freezing Wed night. Thu is also expected to be dry under high pressure and west- northwesterly flow aloft, with a slight moderation of surface temps ahead of the next ripple in the mid level flow.
Did notice ob trends were slightly warmer for temperatures, to which guidance was also warmer as well through the overnight. Garuckas Chattanooga Airport, TN 74 43 57 37 64 / 0 10 0 0 0 Knoxville McGhee Tyson Airport, TN 72 43 53 34 60 / 0 20 10 0 0 Oak Ridge, TN 72 41 53 34 60 / 0 30 10 0 0 Tri Cities Airport, TN 70 42 51 30 56 / 10 20 30 0 0.
Morning surface analysis depicts the late season strong cold front well south of the area with associated pressure rises decreasing locally.
Temperatures will be slightly warmer than yesterday but will remain in the upper 30s to low 40s.
247 AM CDT Tue Apr 20 2021 As a strong cold front moves across the region, colder temperatures and some snow or a rain snow mix will be in place across central Illinois today.
Stronger onshore flow will produce gusty mountain and desert winds, and draw cooler weather farther inland.
210 AM EDT Tue Apr 20 2021 Low pressure will lift northeast of the region tonight with high pressure crossing Tuesday.
357 AM CDT Tue Apr 20 2021 An upper disturbance will keep cooler temperatures in place today into tomorrow along with chances for rain and snow showers during the day before warmer and drier conditions arrive to end the week. To the south, snow showers were seen along a baroclinic zone in the Missouri Valley in association with developing low pressure. As the day progresses, a lobe of vorticity and upper trough will pinwheel through the region as they spin around the large low to the east.
Otherwise a very cold night for April standards is expected tonight with lows likely dropping below freezing area-wide.
The next cold front moving through the TX panhandle across NW OK.
Weak high pressure will develop into Utah tomorrow. The axis of the upper trough now extends across northeast through south-central Utah, with the associated cold front draped across far southern Utah. With the trough tracking eastward away from the area tonight, winds have trended downward and precipitation has mostly tapered off.
227 AM MDT Tue Apr 20 2021 Anomalously deep/cold upper trough is in place over the region, supporting below normal temps and unstable conds. This will support much warmer conds Wed and esp Thur.
248 AM CDT Tue Apr 20 2021 Clear skies will continue for most of the overnight ahead of our next cold front making headway through the Panhandle. Winds will shift out of the N/NE for the morning across much of the forecast area, leaving cooler and unfortunately slightly dustier air in its wake.
358 AM CDT Tue Apr 20 2021 At the surface, high pressure centered over Louisiana early this morning. A cold front stretched from Lake Ontario to north Texas.
This area is still under the cloud cover, and temperatures have been very slow to fall past the mid 30s, but model consensus continues to indicate temps should fall to freezing or below yet this morning, thus the freeze warning will remain in place as well.
The upper energy will combine with the lower level moisture/instability to produce showers across the region this afternoon.
431 AM MDT Tue Apr 20 2021 Currently, upper trough exiting the region, and expect snowfall to continue to diminish through the morning. Overnight, most locations will again fall below freezing, though cloud cover will keep readings from dropping to record levels. An approaching upper-level trough and associated low will drop from the northwest on Wednesday and move into our area over the latter half of this week. The low will bring cold air advection at lower levels along with some additional moisture, which will likely result in some increased cloud cover and precipitation, which is expected to fall as snow.
This afternoon, a strong cold front will move through the area, reaching the I-35 sites around 00Z, shifting the winds out of the north. Temperatures start to rise today and for areas south of the Hill Country area should be able to creep up to around 80 and warmer further south. Temperatures in the Hill Country will be determined by the arrival time of a strong cold front that enters the area this afternoon. The current forecast of mid 70s is on the cooler side of a blend of models as the much cooler airmass behind the front should enter the area before the typical max heating time.
A strong cold front crossing between 10 and 12Z Wed will veer winds to W to NW while becoming gusty at 15-20 kts. Garuckas Chattanooga Airport, TN 77 42 58 36 63 / 0 20 10 0 0 Knoxville McGhee Tyson Airport, TN 74 41 53 34 60 / 0 40 10 0 0 Oak Ridge, TN 74 39 53 33 61 / 0 40 10 0 0 Tri Cities Airport, TN 73 42 52 30 55 / 10 20 30 10 10 NC.
627 AM CDT Tue Apr 20 2021 Cold front moving through the area. /issued 248 AM CDT Tue Apr 20 2021/ Clear skies will continue for most of the overnight ahead of our next cold front making headway through the Panhandle. Winds will shift out of the N/NE for the morning across much of the forecast area, leaving cooler and unfortunately slightly dustier air in its wake. Elsewhere in the region, lighter flow will occur over the Permian Basin and portions of SE NM where clear skies and high pressure will help temps plummet overnight into Wednesday AM.
630 AM CDT Tue Apr 20 2021 (Today and tonight) The cold front has moved though the northwestern half of OK already and is still expected to move out of southeastern OK by late morning.
5 C and slightly lower freezing level, but highest CAPE values remain beyond the stretches of our forecast area (FL Everglades). Temperatures today will limit to the mid 70s across the north with dense clouds, but climb to the low to mid 80s across the Treasure Coast as the previously mentioned breaks in clouds allow for additional heating (potentially resulting in additional convection). A weak cold front is expected to move across most of the local waters overnight tonight, as winds become W/WNW ahead of the front.
321 AM PDT Tue Apr 20 2021 Cooler today with the chance of mainly mountain showers and thunderstorms. Otherwise dry and warmer weather returns through the end of the week.
Overall the main changes with this update were to increase pops along and east of the Highway 83 corridor. An upper level jet is trailing the upper trough. The upper level trough situated over the area for the last couple of days will move east of the area on Wednesday, allowing for upper level ridging and a moderation in temperatures. We do climb into the 50s most areas, and winds shouldn't be too bad, maybe a little breezy east of the Highway 83 corridor in the afternoon.
GAH MORNING DISCUSSION: Upper trough will linger over eastern Montana today with isolated snow showers mixed at times with rain showers mainly over the SE half of the forecast area. The high will keep skies clear on Wednesday and upper ridge will move in from the west with warmer temperatures.
Total snowfall amounts will likely range from 3-4 inches along the I-70 corridor, 1-2 inches along the Highway 50 corridor and less than an inch to a dusting farther south toward the Oklahoma border. Temperatures have fallen to below freezing across all of the area except for south central Kansas and expect that area to do the same in the face of steady cold air advection early this morning. In spite of the sunshine, temperatures are only expected to reach the mid 40s to near 50 given the cooler airmass in place. This will keep cooler air in place over the central Plains.
This will result in continued subfreezing temperatures through early this morning (~10am) and then again tonight. The cold front which ushered in the Canadian airmass is now well south of the Panhandles. High pressure will continue to build in today with the cold airmass, and eventually the dry air will "win out" with skies clearing later today.
1031 AM EDT Tue Apr 20 2021 Currently - A lower level trough arcing north and northeastwards into South Florida, along with the Atlantic ridge reaching across Cuba, is generating moderate south to southwest breezes across the Keys and surrounding waters. Short Term Update - A significant percentage of the lower level trough emanating out of the Yucatan will bleed northeastwards across Florida this afternoon as weak high pressure expands into the Gulf of Mexico. A ridge axis across Cuba will result in generally south to southwest breezes across Keys waters this afternoon. Winds will trend downwards as troughing across the southeastern Gulf of Mexico weakens and Cuba warms.
506 AM MDT Tue Apr 20 2021 This morning, the upper-level trough axis will move across the area. On the backside of the trough, the winds will shift to the NW as high pressure moves into the area from the west. It is expected to be warmer today, with highs in the upper 30s to upper 40s. Dry conditions are expected tonight with overnight lows in the lower 20s and wind chills in the teens. Wednesday a weak ridge will move over the area during the first half of the day as an cut-off trough moves across the Great Basin into the Four Corners region. Temperatures on Wednesday are expected to reach the lower 40s to lower 50s for highs and cool to the mid 20s and lower 30s overnight.