Aikyam-Lab/Synoptic-Bench huggingface dataset:
144 AM EDT SAT APR 11 2015 UPPER LOW THAT HAS BEEN IMPACTING THE AREA SINCE THU EVENING HAS MOVED E OF LAKE SUPERIOR THIS AFTERNOON. LOWS TONIGHT COULD GET QUITE COLD OVER THE INTERIOR W AS SKIES CLEAR AND THE RIDGE MOVES IN. SUNNY SKIES AND A WARMER AIRMASS ON SAT WILL ALLOW TEMPS TO RISE INTO THE MID-UPPER 40S E AND 50S ELSEWHERE. A RIDGE ACROSS THE REGION INTO MID WEEK AND ANOTHER TROUGH TOWARD THE AREA BY THU INTO FRI. GUSTY SSW WINDS TO 30- 35 MPH MAY DEVELOP SUNDAY WITH SFC HEATING PUSHING HIGHS INTO THE LOWER 60S AND MIXING HEIGHTS INTO THE 900-850 MB LAYER.
LIGHT WINDS AND MOSTLY CLEAR SKIES HAVE ALLOWED TEMPS TO FALL INTO THE LOWER TO MID 30S. THE HIGHER CAPE VALUES.
A cold front arriving today will cause strong gusty winds across the region.
AS A LARGE RIDGE OF HIGH PRESSURE SETTLES OVER THE REGION.
617 AM EDT SAT APR 11 2015 HIGH PRESSURE WILL BE BUILDING ACROSS THE REGION TODAY AND SHIFTING EAST ON SUNDAY.
350 AM EDT SAT APR 11 2015 HIGH PRESSURE BUILDING EASTWARD FROM THE OHIO VALLEY WILL BRING BREEZY AND DRIER WEATHER TODAY.
351 AM EDT SAT APR 11 2015 HIGH PRESSURE WILL PROVIDE DRIER AND COOLER WEATHER OVER THE WEEKEND.
350 AM EDT SAT APR 11 2015 HIGH PRESSURE BUILDS THIS WEEKEND.
HIGH PRESSURE AND OFFSHORE FLOW WILL BRING CLEAR SKIES AND ABOVE NORMAL TEMPERATURES THROUGH THE END OF THE WEEK.
336 AM CDT Sat Apr 11 2015 A large area of high pressure is currently centered over central Illinois. Expect temperatures to be a little bit cooler than yesterday, although still near normal in the lower to mid 60s.
BEST FORCING FOR CONVECTION ASSOCIATED WITH THE UPPER TROF FAVORS NORTH DAKOTA. SUNDAY NIGHT WILL FEATURE HIGH PRESSURE IN PLACE OVER THE WESTERN DAKOTAS. HIGH PRESSURE WILL BE OVER THE REGION TO START THE PERIOD.
A COLD FRONT MOVES THROUGH THE CAROLINAS AND OFF OF THE CAROLINA COAST BY THIS AFTERNOON. HIGH PRESSURE BUILDS OVER THE REGION FOR THE WEEKEND BEHIND THE COLD FRONT.
THIS WILL ALLOW DIURNAL CONVECTION ACROSS THE HIGH PLAINS LATER TODAY TO DEVELOP/MOVE EAST ACROSS MUCH OF THE AREA OVERNIGHT. BEFORE RENEWED SURFACE BASED CONVECTION DEVELOPS ALONG A SURFACE COLD FRONT WHICH WILL MOVE INTO CENTRAL KANSAS DURING THE AFTERNOON AS THE ASSOCIATED UPPER TROF MOVES ACROSS THE NORTHERN PLAINS.
FORECAST SOUNDINGS AND RAW MODEL TEMPS SUGGEST AT OR JUST ABOVE THE WARMER GFS MOS WOULD BE FAVORED. A TROUGH COMING ASHORE OVER THE PACIFIC NORTHWEST COAST TODAY WILL DIG DOWN INTO THE NORTHERN ROCKIES TONIGHT AND EJECT EASTWARD OVER THE UPPER MIDWEST THEREAFTER. A WEAK IMPULSE ALONG THE LEADING PERIPHERY OF THIS TROUGH WILL MOVE ACROSS IOWA LATE TONIGHT AND SUNDAY MORNING. AS THE LARGER NORTHERN TROUGH THEN MOVES ACROSS THE REGION IT WILL PUSH A COOL FRONT ACROSS IOWA SUNDAY NIGHT. THE BROAD ASCENT ALONG THE LEADING FLANK OF THE UPPER TROUGH SHOULD PROVIDE FOR GOOD COVERAGE OF THUNDERSTORMS DEVELOPING ALONG AND JUST AHEAD OF THE SURFACE BOUNDARY LATE SUNDAY AFTERNOON THROUGH SUNDAY EVENING. BEHIND THE SUNDAY NIGHT TROUGH PASSAGE THINGS WILL SCOUR OUT.
336 AM CDT SAT APR 11 2015 HIGH PRESSURE DRIFTING SLOW THROUGH THE REGION WILL ENSURE A PLEASANT AND RAINFREE WEEKEND. ESP SUNDAY AS WINDS TURN SOUTHERLY ON THE WEST SIDE OF THE HIGH.
155 AM EDT SAT APR 11 2015 A COLD FRONT. FAIR AND COOLER CONDITIONS EXPECTED SATURDAY AND SUNDAY.
West to northwest winds have been generally in the 10 to 15 mph range, with some higher gusts up in the northeast, closer to the departing upper low. Winds become southerly with time, with highs rising to the lower 70s on Saturday. A southern stream trough also lifts northeast towards the Texas panhandle. A trailing cold front associated with the main trough surges southeast by the evening hours, as strong moisture advection boosts dewpoints into the 60s. In addition, highs in the lower to middle 70s.
HIGHS TODAY WILL BE AROUND 70 EXPECT FOR WARMER MID 70S FAR WEST CLOSER TO A WARM FRONT.
AS OF 4AM TEMPERATURES ACROSS THE REGION ARE IN THE LOW TO UPPER 40S UNDER CLEAR SKIES. A COUPLE DEGREES MORE OF COOLING ARE EXPECTED BEFORE SUNRISE WITH LOWS BOTTOMING OUT IN THE LOW TO MID 40S. JUST A PICTURE PERFECT DAY ACROSS THE MID-SOUTH WITH HIGHS IN THE LOW TO MID 70S. A SLIGHTLY WARMER NIGHT IS EXPECTED OVERNIGHT WITH LOWS AROUND 50 DEGREES. THE WEATHER PATTERN WILL BECOME QUITE UNSETTLED AS AN UPPER LEVEL LOW OVER BAJA CALIFORNIA IS EXPECTED TO BECOME CUTOFF FROM THE MAIN FLOW OUT WEST.
COLD FRONT MOVES ACROSS THE CWA SATURDAY NIGHT INTO SUNDAY MORNING. THE PERIOD OPENS DRY WITH HIGH PRESSURE AT THE SFC AND A BUILDING RIDGE ALOFT.
Another round of showers and thunderstorms is likely Sunday evening with a cold front moving in from the northwest.
305 AM EDT SAT APR 11 2015 HIGH PRESSURE BRINGS DRY WEATHER THIS WEEKEND WITH A WARMING TREND.
1143 PM MDT FRI APR 10 2015 A MOISTURE-STARVED UPPER DISTURBANCE WAS CROSSING WRN CO THIS AFTERNOON BRINGING SOME HIGH CIRRUS CLOUDS TO THE REGION WHILE DAYTIME HEATING AND WEAK INSTABILITY AS GENERATING SOME HIGH- BASED CUMULUS OVER AND NEAR THE HIGHER TERRAIN. SATELLITE WATER VAPOR IMAGES THIS AFTERNOON SHOWED AN UPPER LOW SOUTHWEST OF CA NEAR 130W/30N WHILE AN UPPER TROUGH ALONG THE BRITISH COLUMBIA/PAC NW COAST WAS POISED TO MOVE INLAND. THE UPPER LOW IS EXPECTED TO MOVE OVER SRN CA/NRN BAJA SATURDAY AFTERNOON. THE PACNW TROUGH MOVES ACROSS THE NRN ROCKIES SATURDAY NIGHT PUSHING A DRY COLD FRONT INTO NE UT BY 12Z SUNDAY. A WEAK COLD FRONT WILL BRUSH BY NE UTAH AND NW COLORADO BY EARLY SUNDAY MORNING BRINGING A TEMPORARY WIND SHIFT TO NORTHWESTERLY FLOW.
IT SEEMS THAT SO FAR THIS SEASON THUNDERSTORMS HAVE ONLY FIRED OVER OUR FORECAST AREA WHEN A FRONT OR TROUGH PASSAGE PROVIDED A BETTER FORCING MECHANISM. MAINLY OVER RIDGES AND MOUNTAINS. TEMPERATURES ACROSS THE NORTH WILL BE 3-6 DEGREES COOLER THAN TODAY'S. A RELATIVELY DRY AIRMASS BENEATH A FLAT RIDGE PORTENDS QUIET WEATHER TO BEGIN THE WEEK.
An early morning surface analysis showed high pressure centered over Illinois, slowly working its way southeast toward the lower Ohio Valley. Highs will top out in the lower 60s across southern Indiana and in the mid/upper 60s across central Kentucky. Another quiet night is then on tap as the high centers itself over Virginia. The upper level flow becomes more zonal to southwesterly Sunday downstream of a trough in the Rockies, and this will act to bring warmer air to the area.
1233 AM CDT SAT APR 11 2015 VERY QUIET TONIGHT ACROSS THE FORECAST AREA WITH RIDGE OVER THE REGION. MOS GUIDANCE IS A LITTLE COOLER BUT I USED THAT PATTERN AND ADJUSTED UP SLIGHTLY. SATURDAY TO BE A LOVELY DAY WITH THE RIDGE SLIDING OFF TO THE SOUTHEAST ALLOWING WARM SOUTH FLOW TO DEVELOP OVER THE AREA. MIXING DEPTHS SUPPORT HIGHS IN THE LOWER TO MIDDLE 60S. THOUGH THE NORTH SHORE TO BE COOLER WITH THE ONSHORE FLOW OFF LAKE SUPERIOR.
STRONG SW FLOW WILL CONTINUE ADVECTING IN WARM AIR TODAY AS A THERMAL RIDGE CROSSES THE REGION. TEMPERATURES WILL REACH THE LOWER 70S TO LOWER 80S. A COLD FRONT WILL CROSS THE AREA LATE TONIGHT INTO SUNDAY MORNING. DEEPENING S/W TROUGH WILL CROSS THE NRN PLAINS SUNDAY ALONG WITH CONTINUED CHANCES FOR LIGHT SHOWERS. THE TROUGH WILL CONTINUE EASTWARD SUN NIGHT WITH STRONG HIGH PRESSURE WILL BUILDING BEHIND IT.
409 AM EDT SAT APR 11 2015 HIGH PRESSURE WILL BE BUILDING ACROSS THE REGION TODAY AND SHIFTING EAST ON SUNDAY.
THE UPPER TROUGH WILL MOVE EAST OF THE FORECAST AREA TONIGHT AND WEAK RIDGING WILL BUILD IN. ALSO THERE MAY BE ENOUGH BREAKS IN THE CLOUD COVER LEADING TO COOLER TEMPERATURES AT NIGHT.
414 AM MDT SAT APR 11 2015 MAINLY DRY AND WARMER WEATHER WILL OCCUR TODAY WITH CONTINUED WARM ADVECTION. THIS PLUME OF HIGHER THETA-E AIR IS CURRENTLY IN WEST CENTRAL TEXAS BUT SHIFTS NORTHWARD RATHER QUICKLY ON INCREASING SOUTHERLY LOW LEVEL FLOW AHEAD OF THE LEE TROUGH. HIGHS SHOULD STILL REACH THE LOWER TO MID 70S OVER THE PLAINS.
154 AM EDT SAT APR 11 2015 A COLD FRONT WILL MOVE EAST OF THE REGION BY LATE THIS EVENING.
356 AM CDT SAT APR 11 2015 215 AM CDT A QUIET AND PLEASANT SATURDAY ACROSS THE REGION AS HIGH PRESSURE SCOOTS ACROSS CENTRAL ILLINOIS INTO INDIANA DURING MIDDAY. BEING TO THE NORTH OF THE HIGH CENTER. SO CONTINUE THE FORECAST HIGHS IN THE LOWER 60S FOR MOST LOCATIONS. MTF 240 AM CDT UPPER TROUGH WILL WILL MOVE SOUTHEAST INTO THE NORTHERN PLAINS EARLY SUNDAY WITH SOUTHERLY LOW LEVEL WINDS IN OUR AREA RESULTING WARM AND MODEST MOISTURE ADVECTION.
WITH TEMPERATURES IN THE LOWER/MID 30S IN THE JAMES VALLEY.
210 AM PDT SAT APR 11 2015 A fast moving cold front will move through the region this morning. This will result in rain and snow showers, breezy winds and cooler conditions through today.
AHEAD OF THE NEXT COLD FRONT THAT WILL MOVE THROUGH LATER SATURDAY NIGHT/EARLY SUNDAY. ESPECIALLY FROM THE PINE RIDGE AREA TO WINNER. SATURDAY WILL BE MOSTLY SUNNY AND QUITE WARM AS THERMAL RIDGE MOVES ACROSS THE AREA. COLD FRONT WILL MOVE THROUGH MUCH OF NORTHEAST WY AND FAR NORTHWEST SD LATE SATURDAY EVENING AND ACROSS THE REST OF THE CWA AFTER MIDNIGHT.
Look for a mix of sun and clouds with highs reaching the low to mid 70s.
THE HIGH AND DEEP MOISTURE CONTENT AND THE WARM AIR ADVECTION WILL SUPPORT INCREASINGLY ACTIVE CONVECTION WHICH WILL LIKELY PRODUCE HIGHLY EFFICIENT RAINFALL OVER PORTIONS OF SOUTHWEST AND CENTRAL AREAS OF DEEP SOUTH TEXAS TONIGHT TRACKING NEAR THE COAST SUNDAY MORNING.
240 AM CDT SAT APR 11 2015 215 AM CDT A QUIET AND PLEASANT SATURDAY ACROSS THE REGION AS HIGH PRESSURE SCOOTS ACROSS CENTRAL ILLINOIS INTO INDIANA DURING MIDDAY. BEING TO THE NORTH OF THE HIGH CENTER. SO CONTINUE THE FORECAST HIGHS IN THE LOWER 60S FOR MOST LOCATIONS. MTF 240 AM CDT UPPER TROUGH WILL WILL MOVE SOUTHEAST INTO THE NORTHERN PLAINS EARLY SUNDAY WITH SOUTHERLY LOW LEVEL WINDS IN OUR AREA RESULTING WARM AND MODEST MOISTURE ADVECTION.
358 AM EDT SAT APR 11 2015 HIGH PRESSURE MOVES IN TODAY AND WILL CENTER OVER THE REGION SUNDAY.
236 AM EDT SAT APR 11 2015 HIGH PRESSURE WILL MOVE IN FOR THE BALANCE OF THE WEEKEND. RESULTING IN DRIER AND WARMER WEATHER. EXPECTING A SCATTERED CU FIELD TO DEVELOP AS RESIDUAL LOW- TO MID-LEVEL MOISTURE REMAINS IN THE NORTHWEST FLOW BEHIND THE UPPER LOW. DESPITE HIGH PRESSURE NOSING IN AT THE SURFACE FROM THE WEST. THE LOW-LEVEL PRESSURE GRADIENT WILL REMAIN TAUGHT THROUGH THE AFTERNOON. TAX HIGH PRESSURE IS PROGGED TO BUILD IN UNDER AN UPPER TROUGH SATURDAY WITH DRY WEATHER EXPECTED. WARM ADVECTION IS EXPECTED WITH SOUTHERLY FLOW SUNDAY AS THE HIGH BEGINS TO SHIFT EAST.
HAVE GONE HIGHER THAN GUIDANCE TEMPERATURES BASED ON YESTERDAYS WARMER THAN EXPECTED TEMPERATURES. MUCAPE MARGINAL AND HAVE KEPT POPS ON THE LOW SIDE AND OVER SOUTHWEST NEBRASKA. THIS WILL FORCE A COLD FRONT THROUGH THE AREA SUNDAY MORNING.
UPPER LEVEL TROUGH FROM THE GULF OF ALASKA MOVING INTO THE PACIFIC NORTHWEST THIS MORNING. THE COLD FRONT ASSOCIATED WITH THIS TROUGH IS CURRENTLY ALONG THE CASCADE MOUNTAINS OF WASHINGTON AND NORTHERN OREGON. THUS HAVE DECIDED TO INTRODUCE A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE COLD FRONT THIS AFTERNOON AS THE FRONT MOVES THROUGH THE REGION WITH THE FAVORABLE UPPER LEVEL JET SUPPORT AND AFTERNOON SURFACE HEATING. DRIER AIR MOVES INTO THE REGION AND TEMPERATURES WILL BE AROUND 5 DEGREES BELOW NORMAL SUNDAY BEFORE A WEAK UPPER LEVEL RIDGE BEGINS TO BUILD INTO THE REGION.
AT THE BEGINNING OF THE EXTENDED THE MODELS ARE SHOWING UPPER LEVEL LONG WAVE RIDGE OVER THE CENTRAL PLAINS AND A LONG WAVE TROUGH OVER THE WESTERN U. THESE TWO LONG WAVES LOOKED TO MOVE TOWARD THE EAST WITH THE TROUGH BEING OVER THE PLAINS BY 16/12Z AND OVER THE EASTERN SEABOARD BY THE END OF THE EXTENDED. ON THE SURFACE THE MODELS ARE SHOWING A BOUNDARY WITH HIGH PRESSURE BEHIND IT MOVING THROUGH THE TRI STATE AREA BEGINNING AT 15/18Z. THE REST OF THE EXTENDED LOOKS TO BE INFLUENCE BY HIGH PRESSURE.
In this set-up, the surface thermal ridge and axis of highest dwpnts are near co-located. Overnight there is an indication that the arrival energy assocd shrtwv trof in the sw flow aloft and 40kt LLJ may renew the development of convection, especially s of I-20. Sunday more robust PoPs are warranted with backed mid level flow ahead of an upper low sw of El Paso City, helping to hold low level mstr in place.
153 AM EDT SAT APR 11 2015 A COLD FRONT SHIFTS ACROSS THE VIRGINIA TIDEWATER TONIGHT. HIGH PRESSURE WILL PROVIDE DRIER WEATHER OVER THE WEEKEND.
416 AM EDT SAT APR 11 2015 THIS WEEKEND WILL FEATURE DRY CONDITIONS AND AMPLE SUNSHINE AS HIGH PRESSURE TRACKS EAST THROUGH THE OHIO VALLEY AND MID ATLANTIC. AND SOME WEAK LATE DAY WAA WILL ALLOW AFTERNOON TEMPS TO RECOVER TO NEAR 60F AFTER A COOL START (COOLER LOW-MID 50S HIGHS ALONG THE IMMEDIATE LAKE MI SHORELINE). DRY/SUBSIDENT AIR UNDER THE INFLUENCE OF THE AFOREMENTIONED LOW LEVEL ANTICYCLONE WILL ENSURE GOOD RADIATIONAL COOLING TONIGHT.
A TROUGH IS SHIFTING EAST ACROSS NEW ENGLAND. WITH MODEST RIDGING BUILDING IN ALOFT. SKIES WILL BE MOSTLY SUNNY TODAY WITH HIGHS TOPPING OUT IN THE LOW TO MID 60S. TONIGHT WILL BE MOSTLY CLEAR WITH LOWS IN THE LOW TO MID 40S FOR MOST. ALLOWING FOR RETURN SOUTHERLY FLOW AND WARMER TEMPERATURES. GENERALLY IN THE LOW TO MID 70S.
BUT WITH MUCH COOLER TEMPS ALOFT AND A DECAYING CAP.
LEADING TO INCREASED SOUTHERLY LOW LEVEL WINDS AND MIN TEMPS HOLDING ABOVE FREEZING TONIGHT.
THEN EAST TO SOUTHEAST 7-12 KNOTS INTO THE DAY THURSDAY AS HIGH PRESSURE SHIFTS EAST ACROSS THE MISSISSIPPI.
A HIGH PRESSURE RIDGE AXIS IS PUSHING EAST OF THE FORECAST AREA.
513 AM CST WED FEB 18 2015 A COLD FRONT CONTINUES TO SURGE SOUTH THROUGH THE FORECAST AREA THIS MORNING BRINGING GUSTY NORTHWEST WINDS.
AS FOR HIGHS WILL KEEP READINGS MAINLY IN THE 40S OVER NERN CO EXCEPT CLOSER TO THE WY-CO BORDER WHERE DOWNSLOPE NWLY WINDS COMING OFF THE CHEYENNE RIDGE WILL ALLOW FOR HIGHS IN THE LOWER TO MID 50S. FOR TONIGHT BREEZY CONDITIONS WILL CONTINUE OVER THE HIGHER TERRAIN AND MAY MIX DOWN TO THE LOWER FOOTHILLS AFTER MIDNIGHT.
AN ARCTIC HIGH PRESSURE AREA WILL BUILD INTO THE REGION WITH ANOTHER SURGE OF WINDS TONIGHT HELP MAINTAIN THE ADVISORY CONDITIONS THROUGH THURSDAY AFTERNOON.
/ISSUED 330 AM CST Wed Feb 18 2015/ Northwesterly flow in the wake of a departing upper level low will yield mostly clear skies and temperatures above normal the remainder of the week. Things begin to change over the weekend as an upper ridge becomes amplified off the west coast opening up the central U.
625 AM CST WED FEB 18 2015 ARCTIC HIGH PRESSURE EXTENDED FROM CENTRAL SASKATCHEWAN AND MANITOBA SOUTHWARD INTO THE DAKOTAS. EARLY THIS MORNING THE CENTER OF HIGH PRESSURE (AND COLDEST TEMPERATURES) REMAINED JUST NORTH OF THE CANADIAN BOARDER. THIS AREA OF HIGH PRESSURE WILL SLOWLY SLIDE SOUTHEAST THROUGH THE DAY. WIND SPEEDS WILL BE LESS THAN HALF WHAT THEY WERE YESTERDAY WITH A MUCH MORE SHALLOW PRESSURE GRADIENT. LIGHT SNOW POTENTIAL THURSDAY ALONG A WARM FRONT.
825 AM MST WED FEB 18 2015 STRONG HIGH PRESSURE WILL REMAIN SITUATED OVER THE DESERT SOUTHWEST FOR THE REMAINDER OF THE WEEK. THE HIGH PRESSURE SYSTEM WILL EVENTUALLY BREAK DOWN OVER THE WEEKEND ALLOWING FOR SLIGHTLY COOLER TEMPERATURES. YET REMAINING WARMER THAN AVERAGE. SLIGHTLY COOLER MORNING ACROSS THE LOWER DESERTS.
Arctic high pressure over western Canada drops down into IL by sunset Thu and this to lighten winds Thu & Thu night.
EARLY MORNING WATER VAPOR IMAGERY IDENTIFIED A LONGWAVE TROUGH ACROSS THE CENTRAL CONUS. THE MIDWEST WAS UPSTREAM OF THE TROUGH AXIS. MEANING SUBSIDENCE AND HIGH PRESSURE. BUT AS THE HIGH BUILDS IN WINDS WILL DIMINISH. SO ALTHOUGH TEMPERATURES WILL BE CONSIDERABLY COOLER THAN THIS MORNING. THE COLDEST DAY IS THURSDAY AS AN ARCTIC HIGH PRESSURE SYSTEM PASSES SLOWLY BY.
UPPER LEVEL RIDGE AXIS WILL WEAKEN AS IT MOVES EAST TOWARDS THE NORTHERN AND CENTRAL ROCKIES TODAY, AS AN UPPER LEVEL DISTURBANCE EXITS THE EASTERN PACIFIC AND BEGINS TO ROTATE AROUND THE UPPER LEVEL RIDGE AXIS. AS THIS WEAKENING UPPER LEVEL RIDGE MOVES EAST A NORTHWESTERLY DOWNSLOPE FLOW WILL IMPROVE ACROSS THE CENTRAL HIGH PLAINS. WITH WIND SPEEDS SLIGHTLY STRONGER THAN WHAT THEY WERE EARLIER THIS MORNING AND FROM THE SOUTH/SOUTHWEST WILL FAVOR KEEPING OVERNIGHT LOWS A FEW DEGREES WARMER THAN WHAT THE LATEST GUIDANCE SUGGESTED.
635 AM EST WED FEB 18 2015 PERIODS OF MVFR TO IFR CEILINGS WILL PASS THROUGH THE KEYS ISLAND TERMINALS THROUGH LATE THIS EVENING AS A ROBUST COLD FRONT MOVES ACROSS THE ISLAND CHAIN.
357 AM MST WED FEB 18 2015 Several more benign weather days are in store for most of the Northern Rockies as a ridge of high pressure pushes into the area. A weak trough moving along the MT-BC border will bring some gusty west winds tonight into Thursday morning along the Continental Divide from around Deer Lodge northward.
VFR EXPECTED THROUGH THE FORECAST PERIOD AS HIGH PRESSURE SETTLES OVER THE AREA TODAY AND THURSDAY. TO NEAR THE FREEZING MARK ALONG THE I-10 CORRIDOR. AS HIGH PRESSURE SITS OVER OUR REGION FOR THE NEXT 24-36 HOURS.
ONLY CHANGE WAS TO SLIGHTLY INCREASE SNOW TOTALS ACROSS OHIO CONSIDERING THE LOW VISIBILITIES BEING OBSERVED AT AUTOMATED STATIONS. STILL SEEING SUBSIDENCE OVER MUCH OF THE AREA AHEAD OF THE TROUGH AND FRONT. FIRST WAVE MAKES IT INTO THE RIDGES THIS AFTERNOON. MAINLY OVER THE SOUTHEASTERN CORNER AND PARTICULARLY OVER THE RIDGES. THE HIGHEST SNOWFALL ACCUMULATIONS WILL BE OVER THE RIDGES WHERE ADVISORIES HAVE BEEN ISSUED. MODELS ARE HIGHLIGHTING THE NORTH AND RIDGES WITH THE PASSAGE OF THE LATE AFTERNOON/EVE WAVE.
SLIGHTLY WARMER TEMPS WITH HIGHS IN THE MID/UPPER 60S. A WARMING TREND WILL CONTINUE THROUGH THU AS S TO SE LOW LEVEL WINDS STRENGTHEN ACROSS S TX IN RESPONSE TO DEEPENING LOW PRESSURE ALONG THE ROCKIES.
526 AM CST WED FEB 18 2015 FOR TODAY EXPECT ANOTHER ARCTIC COLD FRONT TO SWEEP ACROSS THE REGION WITH SOME BREEZY NORTHWEST WIND GUSTS OF AROUND 25 MPH WITH AROUND 30 MPH EXPECTED IN THE NORTHWEST DELTA REGION. THIS WILL BRING LOWS FROM THE MID TEENS NORTHEAST TO THE MIDDLE 20S SOUTHWEST AS THE COLD ARCTIC HIGH SETTLES OVER THE LOWER MISSISSIPPI VALLEY. FOR THURSDAY IT WILL BE A COLD DAY WITH HIGHS FROM THE LOWER 30S NORTHEAST TO THE MIDDLE 40S SOUTHWEST. IT WILL BE ANOTHER COLD NIGHT WITH LOWS FROM THE LOWER 20S NORTHEAST TO THE MIDDLE 30S SOUTHWEST.
/ISSUED 456 AM CST WED FEB 18 2015/ ARCTIC AIR WILL CONTINUE TO PLUNGE INTO THE MIDSOUTH TODAY BEHIND A COLD FRONT. EXPECT READINGS RANGING FROM THE LOWER 20S TO THE LOWER 30S. ARCTIC HIGH PRESSURE WILL SETTLE OVER THE MIDSOUTH.
600 AM EST WED FEB 18 2015 LINE OF SHOWERS AHEAD OF A COLD FRONT IS SLOWLY MOVING ACROSS THE AREA. * WIND CHILL ADVISORY ISSUED FOR AREAS NORTH OF AN EVERGLADES CITY TO BOCA LINE LATE TONIGHT-THU MORNING * FREEZE WATCH ISSUED FOR GLADES, HENDRY, INTERIOR COLLIER COUNTIES LATE THU NIGHT-FRI MORNING * HIGH RISK OF RIP CURRENTS GULF BEACHES THROUGH THURSDAY * SMALL CRAFT ADVISORY ALL LOCAL GULF AND ATLANTIC WATERS A COLD FRONT WILL EXIT THE SOUTHERN TIP OF THE PENINSULA THIS MORNING, USHERING IN A COLD AND DRY AIRMASS. TEMPS ARE ALREADY BELOW FREEZING ACROSS THE WESTERN FLORIDA PANHANDLE. ANOTHER COLD FRONT OF ARCTIC ORIGIN. GUIDANCE SUGGESTS TEMPS DROPPING TO NEAR FREEZING ACROSS THESE LOCALES WITH MID-UPPER 30S ELSEWHERE EXCEPT LOWER 40S ALONG THE IMMEDIATE SE FL COAST.
THE AXIS OF A RIDGE OF HIGH PRESSURE WILL REMAIN ALONG THE WEST COAST AND KEEP THE STORM TRACK WELL NORTH AND EAST OF THE AREA THROUGH AT LEAST THURSDAY. MODELS CONTINUED TO SUGGEST THAT THIS PATTERN WILL CHANGE BY THE WEEKEND AS A BROAD TROUGH OF LOW PRESSURE DEVELOPS OVER THE WESTERN UNITED STATES.
A STRONG RIDGE OF HIGH PRES OVER THE REGION WILL WEAKEN OVER THE REGION. THIS WILL BRING CLOUDS AND BIT COOLER AIR TO THE REGION THROUGH MOST OF THE WEEK. OFFSHORE FLOW WILL REDEVELOP OVER THE WEEKEND AS THE RIDGE REBUILDS OFFSHORE. UPPER RIDGE HAS WEAKED AND SHIFTED SE OF THE REGION. MODELS REMAIN IN GOOD AGREEMENT THU NIGHT AND FRI IN REBUILDING THE UPPER RIDGE OFFSHORE.
A STRONG COLD FRONT WILL SWEEP THROUGH THE FORECAST AREA LATE THIS AFTERNOON. BRISK WINDS WILL CONTINUE BEHIND THE COLD FRONT TONIGHT.
623 AM EST WED FEB 18 2015 LOW PRESSURE WILL DEVELOP WELL SOUTH OF THE AREA TODAY.
539 AM CST WED FEB 18 2015 HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE NORTH WITH ONLY OCCASIONAL MID TO HIGH LEVEL CLOUDS EXPECTED.
500 AM CST WED FEB 18 2015 WATER VAPOR SATELLITE IMAGERY SHOWING A DEEP MID-LEVEL TROUGH CARVED OUT ACROSS THE EASTERN CONUS. EMBEDDED SHORT WAVE TROUGH WITHIN NORTHWEST FLOW ALOFT HAS PUSHED AN ARCTIC FRONT SOUTHWARD ACROSS THE AREA. RADAR STILL SHOWING SCATTERED SNOW SHOWERS MAINLY ALONG/EAST OF THE MISSISSIPPI RIVER UNDER THE PASSING MID-LEVEL TROUGH. WILL SEE A CHANCE OF SNOW WEST OF THE MISSISSIPPI RIVER LATE THURSDAY NIGHT AS A WARM FRONT APPROACHES FROM THE NORTHERN/CENTRAL PLAINS.
The Southern Plains will remain in northwest flow aloft through tonight, as the area remains in between a large upper trough to the east and a ridge out west. Full sunshine today, coupled with increasing 850 mb temperatures, will result in a pleasant day with afternoon highs in the lower and middle 60s.
STRONG HIGH PRESSURE WILL REMAIN SITUATED OVER THE DESERT SOUTHWEST FOR THE REMAINDER OF THE WEEK. THE HIGH PRESSURE SYSTEM WILL EVENTUALLY BREAK DOWN OVER THE WEEKEND ALLOWING FOR SLIGHTLY COOLER TEMPERATURES. YET REMAINING WARMER THAN AVERAGE. A HIGHLY AMPLIFIED HIGH PRESSURE RIDGE ALONG THE WEST COAST WILL SHIFT INTO THE DESERT SOUTHWEST LATER TODAY WHILE STARTING TO WEAKEN. TEMPERATURES WILL GET A FEW DEGREE BOOST TODAY WITH HIGHS IN THE LOWER 80S ACROSS OUR WESTERN AREAS AND NEAR 80 DEGREES ACROSS THE SOUTH-CENTRAL LOWER DESERTS. WILL SEE A BIT OF SHIFT IN THE LARGE SCALE FLOW STARTING THURSDAY WITH A WEAK TROUGH OFF THE CALIFORNIA COAST TURNING WINDS MORE OUT OF THE WEST SOUTHWEST. THE RIDGE AXIS. AFTER THE RIDGE BREAKS DOWN LATE THIS WEEK.
The center of high pressure will begin to move in later this evening and overnight.
A RIDGE OVER THE WEST COAST WILL BRING NORTHWEST CALIFORNIA DRY WEATHER AND ABOVE NORMAL TEMPERATURES FOR THE NEXT FEW DAYS. A RIDGE OF HIGH PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER PATTERN FOR THE NEXT FEW DAYS. THE RIDGE WILL WEAKEN A LITTLE TODAY AND THURSDAY AS A WEAK SYSTEM PASSES TO OUR NORTH.
938 AM CST WED FEB 18 2015 MAINLY CLEAR SKIES ACROSS WESTERN AND CENTRAL NORTH DAKOTA THIS MORNING WITH ARCTIC HIGH PRESSURE CENTERED OVER THE FORECAST AREA. ARCTIC HIGH PRESSURE EXTENDED FROM CENTRAL SASKATCHEWAN AND MANITOBA SOUTHWARD INTO THE DAKOTAS. EARLY THIS MORNING THE CENTER OF HIGH PRESSURE (AND COLDEST TEMPERATURES) REMAINED JUST NORTH OF THE CANADIAN BOARDER. THIS AREA OF HIGH PRESSURE WILL SLOWLY SLIDE SOUTHEAST THROUGH THE DAY. WIND SPEEDS WILL BE LESS THAN HALF WHAT THEY WERE YESTERDAY WITH A MUCH MORE SHALLOW PRESSURE GRADIENT. LIGHT SNOW POTENTIAL THURSDAY ALONG A WARM FRONT.
LIMITED AMOUNT OF SNOW COVER WILL CAP COOLING POTENTIAL AND HAVE CONTINUED TO SIDE TO THE WARMER SIDE OF GUIDANCE. HIGH PRESSURE SHIFTS OFF TO THE SOUTHEAST ON THURSDAY AND WILL ALLOW A SOUTH TO SOUTHEAST WIND TO DEVELOP.
UPPER LEVEL RIDGE COLLAPSES AS IT MOVES EAST OVER THE AREA TODAY. WITH HIGHS 55 TO 60 IN THE LOWER ELEVATIONS AND IN THE 40S IN THE POPULATED MOUNTAIN AREAS.
924 AM EST WED FEB 18 2015 LOW PRESSURE WILL DEVELOP WELL SOUTH OF THE AREA TODAY.
THE THERMAL TROUGH WILL STILL BE WELL ENTRENCHED ON THURSDAY WITH HIGHS. ONLY REACHING THE TEENS NORTH TO THE LOWER 20S SOUTH.
AT 250 MB THIS MORNING A LONGWAVE TROUGH WAS ANALYZED ACROSS THE CENTRAL UNITED STATES WITH SOUTHEAST TEXAS AT THE BASE OF THE TROUGH AXIS. THE TROUGH AXIS WILL CONTINUE TO SWING TO THE EAST TODAY ALLOWING FOR BEAUTIFUL WEATHER THIS AFTERNOON. 850 TEMPS ARE CURRENTLY RIGHT AROUND FREEZING AND WITH FULL SUN THIS WILL TRANSLATE TO HIGH TEMPERATURES IN THE LOWER 60S. ON THURSDAY ANOTHER COLD FRONT WILL DIVE SOUTHWARDS AND WILL LIKELY PUSH TO THE EAST AND ONLY AFFECT OUR FAR NORTHEASTERN COUNTIES. CLOUDS WILL START TO MAKE A RETURN TO THE AREA THURSDAY AFTERNOON IN THE FORM OF SOME CU WITH SLIGHTLY WARMER TEMPERATURES.
AND EXPECT MAXIMUM TEMPERATURES TODAY TO BE ABOUT FIVE DEGREES WARMER THAN YESTERDAY.