Aikyam-Lab/Synoptic-Bench huggingface dataset:
Have an omega block setting over the middle of the country at this time with the CWA under the ridge and an upper low approaching the four corners region with the other one over the Mid-Atlantic states. a surface cold front is situated over northern Missouri. a series of three impulses are forecast to move around the upper low.
WILL SEE SOME SHOWERS MOVING NORTH INTO THE SOUTHWEST CWA LATE TONIGHT AND CONTINUING THROUGH THE DAY SUNDAY AS A PIECE OF ENERGY EJECTS NORTHEAST OUT OF THE LARGE UPPER TROUGH ACROSS THE SOUTHWEST CONUS.
451 PM PDT SAT MAY 7 2016 The arrival of a cold front will bring gusty winds to much of the Inland Northwest Sunday.
757 PM EDT SAT MAY 7 2016 AVIATION A COLD FRONT PASSED SOUTH OF THE STATE TODAY WITH COOLER AIR FILTERING IN ON NORTHERLY WINDS. A WEAK TROUGH OF LOW PRESSURE MOVING THROUGH THE STATE ON SUNDAY MAY GENERATE AN ISOLATED SHOWER OVER INTERIOR AND EASTERN PORTIONS OF THE STATE. A WETTER PATTERN SETS UP AS WE HEAD INTO THE WORK WEEK WITH WARM FRONTAL BOUNDARY NEARBY INTO MID WEEK.
MOISTURE WILL CONTINUE TO DEEPEN INTO SUNDAY WITH SCTD CU AGAIN DEVELOPING ALONG WITH AN INCREASE IN CIRRUS SPREADING IN FM THE WEST AS THE UPR RIDGE BEGINS TO FLATTEN. THE HIGH PRESSURE SYSTEM WILL MOVE FURTHER TO THE EAST ALLOWING FOR RETURN FLOW OFF THE GULF TO OCCUR FOR THE ENTIRE FORECAST AREA. ALLOWING UPPER LEVEL LOW OVER THE MOUNTAIN WEST TO MOVE TO THE EAST. UPPER LEVEL RIDGING SHOULD KEEP ANY SHOWERS FROM FORMING.
SOME OF THESE CLOUDS WL BE HIGH LVL AS PACIFIC MOISTURE DEEPENS IN ADVANCE OF AN APPROACHING MID/UPR TROUGH AXIS ANCHORED TO OUR WEST.
704 PM CDT SAT MAY 7 2016 19z/2pm surface analysis shows cold front sagging southward toward the I-74 corridor. 0-6km bulk shear remains rather weak, but is expected to increase to between 40 and 50kt later this afternoon/evening as an upper trough digs into the Great Lakes. The cold front will stall out south of our forecast area in the Ohio River Valley by Sunday morning, with spotty showers lingering in the post-frontal airmass across central IL.
STILL EXPECT SOME ADDITIONAL ELEVATED CONVECTION TONIGHT WITHIN NARROW RIBBON OF LOW LEVEL MOISTURE TRANSPORT AS THE LOW LEVEL JET VEERS ACROSS CENTRAL AND SOUTHEAST KANSAS AFTER MIDNIGHT.
THE HIGHEST POPS WILL BE NORTH WITH MUCH LESSER VALUES SOUTH OF HIGHWAY 40.
AN UPPER TROUGH IS SLOWING MOVING EAST WHICH WILL ALLOW SHOWER AND THUNDERSTORM ACTIVITY OVER THE INTERIOR TO SUBSIDE. HIGH PRESSURE WILL GRADUALLY BUILD ALONG THE WEST COAST OVER THE NEXT FEW DAYS. THE UPPER LEVEL LOW OVER THE DESERT SOUTHWEST THAT HAS BEEN BRINGING US SHOWERS OVER THE LAST FEW DAYS IS FINALLY STARTING TO MOVE OFF TO THE EAST. TONIGHT HIGH PRESSURE TRIES TO START BUILDING INTO THE AREA WITH NORTHWEST FLOW IN PLACE OVER THE AREA. SUNDAY THE HIGH PRESSURE CONTINUES TO BUILD OVER THE AREA.
802 PM EDT SAT MAY 7 2016 A COLD FRONT WILL MOVE ACROSS THE REGION LATER THIS EVENING INTO EARLY SUNDAY MORNING.
HIGH PRESSURE WILL CONTINUE TO BUILD IN MAKING FOR A QUIET PERIOD.
DRY AND PLEASANT WEEKEND WEATHER TO CONTINUE AS UPPER LOW OVER THE EASTERN SEABOARD SLOWLY DRIFTS INTO THE WESTERN ATLANTIC KEEPING THE DRY NW MID TO UPPER FLOW OVER THE REGION. CONSIDERABLE UPPER LOW OVER THE GREAT LAKES WILL LIFT NORTHWARD INTO EASTERN CANADA. A DEEPENING TROUGH WILL TAKE SHAPE OVER THE NORTHERN AND CENTRAL PLAINS REGION. ALLOWING FOR BROAD UPPER RIDGING ACROSS THE GULF COASTAL STATES.
/ISSUED 927 PM CDT SAT MAY 7 2016/ HIGH PRESSURE CENTERED OVER THE CENTRAL GULF STATES THIS EVENING HAS ALLOWED FOR RETURN FLOW OFF THE GULF. MOISTURE WILL CONTINUE TO DEEPEN INTO SUNDAY WITH SCTD CU AGAIN DEVELOPING ALONG WITH AN INCREASE IN CIRRUS SPREADING IN FM THE WEST AS THE UPR RIDGE BEGINS TO FLATTEN. THE HIGH PRESSURE SYSTEM WILL MOVE FURTHER TO THE EAST ALLOWING FOR RETURN FLOW OFF THE GULF TO OCCUR FOR THE ENTIRE FORECAST AREA. ALLOWING UPPER LEVEL LOW OVER THE MOUNTAIN WEST TO MOVE TO THE EAST. UPPER LEVEL RIDGING SHOULD KEEP ANY SHOWERS FROM FORMING.
910 PM CDT SAT MAY 7 2016 HIGH PRESSURE REMAINS LOCATED ACROSS THE SOUTHEAST UNITED STATES THIS EVENING WHILE A WARM FRONT STRETCHES ACROSS MID MISSOURI INTO NEBRASKA. /ISSUED 305 PM CDT SAT MAY 7 2016/ SKIES REMAIN SUNNY OVER THE FORECAST AREA AS TEMPERATURES HAVE WARMED INTO THE LOW TO MID 80S. HIGH PRESSURE WAS NEAR NEW ORLEANS LOUISIANA THIS AFTERNOON. THE HIGH WILL DRIFT EAST ACROSS THE GULF OF MEXICO TONIGHT. SUNDAY WILL BE ANOTHER NICE DAY WITH DRY WEATHER AND WARM TEMPERATURES AS HIGHS WILL BE IN THE LOW TO MID 80S. BY SUNDAY EVENING LOW PRESSURE WILL BE OVER CENTRAL KANSAS WITH A COLD FRONT EXTENDING SOUTH INTO WESTERN OKLAHOMA AND WEST TEXAS.
1122 PM CDT SAT MAY 7 2016 Clusters of thunderstorms have developed this afternoon ahead of a southward-moving cold front. The passage of the warm front puts the entire CWA in the warm sector until a cold front eventually moves across the region on late Wed night into Thu.
WHICH SHOULD STAY IN THE LOWER 60S. THE AIR MASS WILL CONTINUE TO MODIFY AND HIGHS SHOULD REACH THE LOWER 80S ALONG THE BEACHES AND MID-UPPER 80S INLAND.
WE DON'T THINK WE'LL SEE THE LOWER 30S LIKE THIS MORNING. HIGH PRESSURE WILL REMAIN OVER THE NORTHERN PLAINS TONIGHT. WEAK HIGH PRESSURE WILL REMAIN ACROSS THE NORTHERN PLAINS THROUGH THE EVENING.
/ISSUED 325 PM CDT SAT MAY 7 2016/ MID-LEVEL RIDGE CONTINUES TO MOVE EAST AHEAD OF AN UPPER CLOSED LOW OVER THE SOUTHWEST U. LOOKS TO BE BREEZY FROM THE SOUTHWEST ON SUNDAY WITH A TIGHT PRESSURE GRADIENT ASSOCIATED WITH THE PASSING UPPER LOW. THE CLOSED LOW WILL CONTINUE TO LIFT NORTHEAST INTO THE GREAT PLAINS THROUGH MID-WEEK.
ALTHOUGH THE PROXIMITY OF THE LARGE UPPER LOW TO OUR SOUTHEAST WILL KEEP SHOWERS GOING THROUGH THE NIGHT. THE UPPER LOW WILL MOVE FAR ENOUGH AWAY TO BRING A DRIER AND STABLE NORTHWEST FLOW INTO SE OREGON ON SUNDAY. YET STILL CLOSE ENOUGH FOR A CHANCE OF SHOWERS/AFTERNOON THUNDERSTORMS MAINLY OVER THE HIGHER TERRAIN OF SW IDAHO.
722 PM EDT SAT MAY 7 2016 A COLD FRONT WILL BRING SCATTERED SHOWERS WITH SOME THUNDERSTORMS THIS AFTERNOON AND EVENING. COOLER TEMPERATURES ARE EXPECTED FOR SUNDAY BEHIND THE FRONT. WITH WARMER AND UNSETTLED WEATHER EXPECTED FOR THE WORK WEEK.
/ISSUED 305 PM CDT SAT MAY 7 2016/ SKIES REMAIN SUNNY OVER THE FORECAST AREA AS TEMPERATURES HAVE WARMED INTO THE LOW TO MID 80S. HIGH PRESSURE WAS NEAR NEW ORLEANS LOUISIANA THIS AFTERNOON. THE HIGH WILL DRIFT EAST ACROSS THE GULF OF MEXICO TONIGHT. SUNDAY WILL BE ANOTHER NICE DAY WITH DRY WEATHER AND WARM TEMPERATURES AS HIGHS WILL BE IN THE LOW TO MID 80S. BY SUNDAY EVENING LOW PRESSURE WILL BE OVER CENTRAL KANSAS WITH A COLD FRONT EXTENDING SOUTH INTO WESTERN OKLAHOMA AND WEST TEXAS.
16 A QUIET AND DRY WEATHER PATTERN WILL CONTINUE THROUGH THE SHORT TERM AS HIGH PRESSURE REMAINS ANCHORED OVER THE DEEP SOUTH. SHORT RANGE MODELS AGREE ON THE UPPER RIDGE BEGINNING TO WEAKEN ITS GRIP SUNDAY NIGHT AS WEAK DISTURBANCES EMBEDDED WITHIN THE DEVELOPING SOUTHWEST FLOW ALOFT BEGIN TO KICK EAST OUT OF TEXAS.
720 PM EDT SAT MAY 7 2016 A COLD FRONT WILL MOVE SOUTHEAST OUT OF THE OHIO VALLEY TONIGHT AND EARLY SUNDAY.
1141 PM EDT SAT MAY 7 2016 A COLD FRONT WILL MOVE ACROSS THE REGION OVERNIGHT.
955 PM EDT SAT MAY 7 2016 MARINE A COLD FRONT PASSED SOUTH OF THE STATE TODAY WITH COOLER AIR FILTERING IN ON NORTHERLY WINDS. A WEAK TROUGH OF LOW PRESSURE MOVING THROUGH THE STATE ON SUNDAY MAY GENERATE AN ISOLATED SHOWER OVER INTERIOR AND EASTERN PORTIONS OF THE STATE. A WETTER PATTERN SETS UP AS WE HEAD INTO THE WORK WEEK WITH WARM FRONTAL BOUNDARY NEARBY INTO MID WEEK.
THE COLD FRONT IS JUST SOUTH OF THE CWA THIS AFTERNOON AND WILL EVENTUALLY BECOME STATIONARY OVER SOUTH CENTRAL IL TONIGHT. LOWS SHOULD BE ABLE TO DIP INTO THE LOWER 40S MOST AREAS AND POSSIBLY UPPER 30S IN THE USUAL COOL SPOTS. THEN HIGH TEMPS MIGHT END UP A FEW DEGREES WARMER THEN CURRENTLY ADVERTISED UPPER 60S/NEAR 70.
JHM The low will be moving northeastward away from Southern California tonight and showers should gradually diminish over the interior late tonight and Sunday.
SOME UNCERTAINTY DUE TO HIGH PRESSURE ARRIVING FROM THE NORTH. MUCH DRIER SFC DEWPOINTS IS MOVING INTO NORTHERN IA AS THE HIGH PRESSURE ARRIVES. FLOW AROUND THE LOW WILL ADVECT GULF MOISTURE INTO THE UPPER MIDWEST AND THE KEY TO THE STRONGER STORMS WILL BE THE LOCATION OF THE SURFACE FRONTAL BOUNDARY. WEAK RIDGING WILL BE IN PLACE AND THE WARM FRONT WILL BE WILL INTO MISSOURI.
WARMER TEMPS HAVE DEFINITELY RETURNED TO END THE WEEK. A NW-SE UPPER FLOW MOVING 'THROUGH' UPPER RIDGING IN PLACE ALONG THE MISSISSIPPI VALLEY WAS SENDING SHOWER AND THUNDERSTORM COMPLEXES ALONG THE OHIO VALLEY. OTHERWISE, WITH HIGH PRESSURE OVER THE GULF COAST REGION IN CONTROL OF THE OVERALL WX PATTERN, VFR CONDS ARE XPCTED THROUGH THE PERIOD. WITH RIDGING ACROSS THE AREA EXPECT MOSTLY CLR SKIES TONIGHT WITH LIGHT SW WINDS. SUNDAY LOOKS TO BE ANOTHER WARM/DRY DAY THANKS TO THE ABOVE MENTIONED RIDGE.
609 PM CDT SAT MAY 7 2016 LARGE UPPER LOW NUDGES A LITTLE EASTWARD TONIGHT. WITH THE LEADING EDGE OF THE LOW EVENTUALLY MOVING INTO SOUTHWEST NEB AND EASTERN CO. THERE IS A SHORT WAVE EVIDENT CURRENTLY MOVING THROUGH SOUTHERN CO AHEAD OF THE PARENT UPPER LOW. THE UPPER LOW TO THE WEST OF OUR FORECAST AREA DOES NOT MOVE MUCH AT ALL. BEFORE SMALL POPS RESURFACE IN THE LATE AFTERNOON FOR TSRA ONCE AGAIN IN OUR SOUTHERN ZONES ALONG THE LOW LEVEL FRONTOGENETIC ZONE.
WITH RIDGING ACROSS THE AREA EXPECT MOSTLY CLR SKIES TONIGHT WITH LIGHT SW WINDS. SUNDAY LOOKS TO BE ANOTHER WARM/DRY DAY THANKS TO THE ABOVE MENTIONED RIDGE.
AN INCREASINGLY MOIST AND UNSTABLE SOUTHWESTERLY FLOW ALOFT WILL COMBINE WITH A PACIFIC COLD FRONT TO SPREAD A CHANCE OF SHOWERS AND THUNDERSTORMS WEST TO EAST ACROSS THE AREA AFTER 20Z.
Closed cyclone spinning over Utah this afternoon, with surface dryline sharpening over SE Colorado and eastern New Mexico. First spoke of energy rotating out ahead of the low ignited a band of light showers and isolated thunder, which will continue to move northeast this afternoon. As parent upper low ejects to near Cheyenne, strong surface cyclogenesis is expected across the western CWA.
VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT 24 HOURS WITH HIGH PRESSURE CENTERED ALONG THE GULF COAST.
INCREASING MOIST AIR VIA RETURN FLOW FROM THE GULF AND THE APPROACH OF A LONGWAVE TROUGH FROM THE WESTERN STATES WILL INCREASE CLOUD COVER. AND WITH CLOSER PROXIMITY TO THE UPPER LOW AND DRYLINE IN WEST TEXAS.
1153 PM CDT SAT MAY 7 2016 Cold front has now pushed well south of the central IL forecast area. Temperatures will be several degrees cooler tonight in the post- cold-frontal air mass with lows in the upper 40s and low 50s. 19z/2pm surface analysis shows cold front sagging southward toward the I-74 corridor. 0-6km bulk shear remains rather weak, but is expected to increase to between 40 and 50kt later this afternoon/evening as an upper trough digs into the Great Lakes. The cold front will stall out south of our forecast area in the Ohio River Valley by Sunday morning, with spotty showers lingering in the post-frontal airmass across central IL.
39 INCHES WHICH IS THE LOWEST ON RECORD FOR THE DATE (OLD RECORD WAS 0. TONIGHT WILL BE ANOTHER COOL ONE FOR THIS TIME OF YEAR, ALTHOUGH PERHAPS A COUPLE OF DEGREES WARMER THAN LAST NIGHT.
THIS MODERATE ONSHORE FLOW WILL SATURATE THE LOWER LEVELS AND INCREASE THE CHANCE FOR LATE PERIOD MVFR DECKS UNDER A THICKENING STRATUS/CIRRUS DECK.
Lots of sunshine over the southern half of Illinois, along with dewpoints in the mid to upper 50s should support development of thunderstorms along and possibly ahead of the cold front that is draped east to west across central Illinois. The 12Z models are in agreement in bringing the cold front about half way through the area this evening and then stalling it out overnight into Sunday morning. The old boundary will lift back north as a warm front late Sunday and Sunday night, and cannot rule out an isolated storm along I-64, mainly in southern Illinois Sunday afternoon and evening. We will have a short wave ridge overhead Sunday, so development should be extremely limited if there is any at all.
leaving them in the low end VFR range across E OK.
619 PM CDT SAT MAY 7 2016 Clusters of thunderstorms have developed this afternoon ahead of a southward-moving cold front. The passage of the warm front puts the entire CWA in the warm sector until a cold front eventually moves across the region on late Wed night into Thu.
632 AM EST Mon Dec 19 2016 A slow moving cold front has pushed just southeast of the forecast area.
Overcast skies over these counties should keep the temperatures from falling below freezing. High pressure continues to build into the region this morning with gusty winds still over the coastal counties. The cloud deck is expected to remain over the area tonight which will keep the temperatures from falling below freezing.
546 AM CST Mon Dec 19 2016 /12Z TAFS/ VFR conditions will prevail across North and Central Texas today as high pressure has settled into the region. Light northerly winds will become light southerly by tonight with warmer temperatures expected on Tuesday. The proximity of the ridge axis will cause the northerly winds to weaken even more today. This should finally bring an end to the cold air advection, allowing temperatures to climb above freezing this afternoon. Winds will remain light and skies should remain mostly clear as we move through the evening and overnight hours, which will lead to sub-freezing conditions area-wide tonight and early Tuesday.
712 AM CST Mon Dec 19 2016 The biggest noticable difference from the 00z sounding to the 12z sounding is a drier airmass now in place above 600mb, and continued cooling in the low levels below 925mb. However, the depth of the below freezing airmass is very shallow at only around 1500 feet from just off the surface to around 960mb. Above 960mb, temperatures climb to well above freezing with the top of the temperature inversion peaking out around 13C or 55F. The reason for this continued deep layer of warmer air aloft is persistent southwest flow. This southwest flow pattern has also kept continued cloud cover and some very light showers in place as the warm and more moist airmass is forced up and over the low level cold pool.
A warmer westerly flow will develop over the Great Basin today and Tuesday ahead of a cold front.
/issued 309 AM CST Mon Dec 19 2016/ Arctic high pressure continues to build into the Mid-South this morning. Current temperatures range from the lower teens to the lower 20s. The high will settle over the area tonight. A gradual warming trend will begin on Tuesday as the high shifts east.
307 AM MST Mon Dec 19 2016 Northwest flow aloft continues this morning ahead of a weak ridging across the Pac NW. A strong 1045mb high pressure sits across the central plains into the Midwest. A weak but fast moving cold front will cross the region Tue night associated with a strong wave near the ND/Canadian border.
Expect cold overnight low temperatures with single digits to teens across much of the high country. A quiet week with a dynamic weekend is expected as an elongated trough currently over the South West will split into a closed off low, centered over the Pacific off of Baja California.
708 AM EST Mon Dec 19 2016 High pressure will keep us dry through at least midweek.
735 AM EST Mon Dec 19 2016 Strong high pressure will build across the region into Monday with a brief return to cold temperatures.
547 AM CST Mon Dec 19 2016 The mean, longwave upper trough across the central/southwest CONUS is in the process of breaking down, with a northern branch of upper level westerlies off of the Pacific taking over from tonight through midweek.
A weak cold front will begin to approach the nrn TAF sites late in the forecast period, and this is reflected by winds trending more from the west or west northwest at KGUY and KDHT. /Issued 434 AM CST Mon Dec 19 2016/ Latest water vapor imagery places broad trough lifting up towards the northeast states. Meanwhile, a cutoff upper level low is spinning off the Pacific coast of the Baja Peninsula. This low is sending some high level cirrus clouds into the Panhandles which should persist through the morning hours.
Surface map early this morning has high pressure sliding southeast toward the Ohio River Valley as an area of low pressure was moving through southern Manitoba. Warm air advection/rather brisk southwest winds continue tonight into Tuesday in warm sector of low pressure moving through southern Canada. Otherwise, plan on lows tonight in the teens and highs Tuesday in the lower 30s. Clouds spread in Tuesday night ahead of low pressure drooping southeast from Canada.
1045 AM EST Mon Dec 19 2016 Unseasonably warm and moist airmass over the FL peninsula ahead of a cold front pushing acrs the Big Bend/E Panhandle this morning. Cape Canaveral wind profiler showing winds diminishing through the sfc-6KFT lyr as the frontal trof over N FL has disrupted the lcl pgrad. Aloft, mid lvl ridging over S FL/FL Straits is generating steady SW flow thru the H85-H50 lyr that will tap additional dry mid lvl air upstream.
607 AM EST Mon Dec 19 2016 High pressure will keep us dry through at least midweek.
1013 AM EST Mon Dec 19 2016 High pressure and a dry airmass will build across the region through mid week.
Latest observation data shows very shallow cold front along I-10 corridor moving slowly southward. A more N to NE wind develops today behind cold front moving southward over the area. A cold front will move SE across area waters Today, with strong high pressure building to the Northwest Tonight. The high weakens to the North into mid week.
1039 AM EST Mon Dec 19 2016 Early visible satellite photographs show skies are partly cloudy with temperatures already in the lower 80s along the Florida keys. Surface wise, a western Atlantic ridge axis extends across the southern portion of the Florida peninsula, with a stationary front draped across the Florida panhandle and the adjacent atlantic and gulf waters. Given the persistent deep layered western Atlantic ridge axis nearby, limited moisture within a backing northeast to east flow below 700 mb will allow a shallow cloud line to form this afternoon along the island chain. Clouds locally forming over the land mass of the Lower Keys have allowed for brief stints of MVFR ceilings around 2kft this morning at EYW.
Those areas could see midday highs and then the cooler air sloshing in. The main difference was a bit cooler temperatures in the valley cold pools.
A complicated situation will arise overnight and Tuesday when surface temps are still below freezing while above-freezing air comes in above it. This will result in areas of freezing rain or sleet, especially on Tuesday. Current winter storm watch for northern zones in Idaho will be upgraded to winter storm warning for heavy snow there, while zones as far south as the Treasure Valley will come under a winter weather advisory for snow and/or sleet and freezing rain late tonight through Tuesday.
930 AM EST Mon Dec 19 2016 Strong high pressure will build across the region into Monday with a brief return to cold temperatures.
918 AM CST Mon Dec 19 2016 High pressure over the midwest continues to settle southeastward today with a few gusts up to 15 mph as the pressure gradient starts to slacken today. Temps are slowly warming with parts of NE AL already at freezing and NW AL in the mid 20s. The majority of the area should be above freezing by noon today. High pressure layered across much of the region will continue to gradually shift ewd Tonight into Wed.
Subfreezing temperatures are in place across all of south central Texas with values ranging from near 20 in the Hill Country to near 30 in the coastal and Rio Grande plains. Mid and high level cloud cover will limit insolation over the Rio Grande plains and Hill Country and we have opted for the cooler guidance numbers here. Just above the low-level cold air, return southerly flow will bring an increase in low clouds overnight. The low clouds will keep temperatures up over our southern areas and this should keep temperatures near or just above freezing south of the Highway 90 corridor. Farther north, clouds will likely move in too late to have much of an impact on temperatures and we expect another round of freezing temperatures tonight.
550 AM EST Mon Dec 19 2016 Cold Arctic high pressure builds over the area today. A warm front will move north of the region Tuesday.
614 AM EST Mon Dec 19 2016 High pressure and a dry airmass will build across the region through mid week.
High pressure will settle across the region allowing northeast winds 5 to 10 knots today to become light and variable overnight.
507 AM EST Mon Dec 19 2016 Cold Arctic high pressure builds over the area today. A warm front will move north of the region Tuesday.
For the next couple of days, the synoptic pattern will show little change with a closed low spinning west of the central Baja Coast and the main storm track moving into Washington. In between lies a ridge of high pressure over California and forecast models keep it in place today and then weaken it on Tuesday.
Temperatures by mid- week will moderate to more typical values with highs in the lower to mid 30s.
A warm front extended from a low pressure system in south central Canada southward into western Minnesota. Warm advection continued behind the warm front with southwest winds across ND and current temperatures in the teens to mid 20s above zero. The warmer temperatures today may help form a crust on top of the snow cover across the state.
419 AM CST Mon Dec 19 2016 (Today and Tonight) Today will see warmer temperatures under some high cloud cover and northeast winds at 5-10 mph. Monday night will be around 10 degrees warmer than this morning with lows generally in the mid 20s.
Breezy winds and much warmer temperatures continue to be the main highlights for today. A warm front extended from a low pressure system in south central Canada southward into western Minnesota. Warm advection continued behind the warm front with southwest winds across ND and current temperatures in the teens to mid 20s above zero. The warmer temperatures today may help form a crust on top of the snow cover across the state.
434 AM CST Mon Dec 19 2016 Latest water vapor imagery places broad trough lifting up towards the northeast states. Meanwhile, a cutoff upper level low is spinning off the Pacific coast of the Baja Peninsula. This low is sending some high level cirrus clouds into the Panhandles which should persist through the morning hours.
A slight ridge in place over Northeast Montana this morning with a quick-moving trough moving across Western Canada will bring a strong westerly flow over the local region today. The base of the upper trough slide across Nemont during the late afternoon and early evening will spread low clouds across the area, and maybe some light snow and rain. Another upper ridge follows for Tuesday for continued above normal temperatures. Tuesday night will see the next wave, a fast-moving, tight, miniature cyclone that will march right through Northeast Montana, producing snow and wind.
We will start off this period between high pressure across IL and low pressure across southern Manitoba with the parent low over British Columbia.
These temps will continue to fall into the mid teens by daybreak with temps further south into the lower to mid 20s attm.
/Issued 310 AM EST Mon Dec 19 2016/ (Added black ice discussion) Early this morning some sub-freezing temps are making their way farther south than forecast and actually reaching the freezing mark now across metro Atlanta. Will be expanding the Special Weather Statement for patch black ice potential farther south to include the metro and keep the expiration at 11 AM when some farther north locations should warm above freezing. Drier midlevels start to advect southward by Tuesday so should finally start to see some scattering of the low cloud deck then across north GA.