Aikyam-Lab/Synoptic-Bench huggingface dataset:
937 PM CST SUN FEB 8 2015 SOME FOG BEGINNING TO DEVELOP ACROSS THE COASTAL COUNTIES THIS EVENING AND THIS MAY SPREAD INLAND TOWARD THE US 59 CORRIDOR OVERNIGHT AS THE COLD FRONT APPROACHES FROM THE NORTH. CONDITIONS WILL IMPROVE FROM NORTHWEST TO SOUTHEAST DURING THE LATE NIGHT THROUGH MORNING HOURS AS A WEAK COLD FRONT MOVES ACROSS THE AREA AND DRIES THINGS OUT. NEXT 7 DAYS PRIMARILY REMAINS A TEMP FCST WITH MEAGER MOISTURE AVAILABILITY AND UPPER RIDGING (IN GENERAL) KEEPING THINGS DRY. THE FOG MAY BECOME MORE WIDESPREAD OVER THE BAYS AND NEARSHORE WATERS LATER THIS EVENING AND OVERNIGHT AS A PREFRONTAL TROUGH APPROACHES THE COAST. THE TROUGH WILL MOVE OFF THE COAST AROUND SUNRISE MONDAY MORNING. THE ACTUAL COLD FRONT SHOULD ARRIVE BY MID MORNING AND HELP SCOUR OUT ANY LINGERING FOG.
559 PM EST SUN FEB 8 2015 HIGH PRESSURE WILL REMAIN TO OUR NORTH THROUGH MONDAY AS WEAK LOW PRESSURE TRACKS ALONG A FRONTAL BOUNDARY OFF THE COAST.
LOW PRESSURE OVER THE GREAT LAKES WILL MOVE EASTWARD AND INTO THE NORTHERN MID ATLANTIC STATES TONIGHT INTO MONDAY PUSHING A COLD FRONT SOUTHWARD FROM THE TENNESSEE VALLEY INTO CENTRAL FLORIDA.
WEAK MID LEVEL RIDGING AND DRYER AIR SHOULD HELP TO KEEP ANY LAKE EFFECT FROM IMPACTING NORTHERN WISCONSIN TONIGHT. MODELS SHOWED CONSIDERABLE LOW LEVEL MOISTURE THROUGHOUT THE NIGHT WITH SOME DRYING DURING THE DAY ON MONDAY AS HIGH PRESSURE MOVES INTO THE STATE.
403 PM CST SUN FEB 8 2015 VERY NICE SPRING DAY ON TAP AS TEMPS CLIMBED INTO THE LOWER 70S MOST LOCATIONS.
UPPER LEVEL RIDGE OVER THE GREAT BASIN WILL SHIFT EAST ACROSS THE CENTRAL ROCKIES TONIGHT AND MONDAY. A PACIFIC SYSTEM WILL MOVE OVER THE TOP OF THE RIDGE CAUSING FLOW ALOFT TO INCREASE AND BECOME MORE WESTERLY MONDAY AFTERNOON. WITH THE RIDGE MOVING OVER THE STATE MONDAY. FRONT LEFT QUAD OF A 130KT JET ROUNDING THE TOP OF THE UPPER RIDGE OVER COLORADO PASSES OVER THE NRN MTNS MONDAY NIGHT.
A COLD FRONT AND UPPER LEVEL WAVE WILL EXIT THE AREA TONIGHT.
HIGHLIGHTS OF THE SHORT TERM ARE FOG AND FREEZING DRIZZLE THIS AFTERNOON INTO TONIGHT. DID ADD A MENTION OF PATCHY FREEZING DRIZZLE TO THE SLIGHT CHANCE SNOW WITH A POTENTIAL LOSS OF ICE CRYSTALS IN THE COLUMN THROUGH THE EVENING. THE SIMILAR SETUP CONTINUES OF HIGHS IN THE SOUTHWEST BEING MUCH WARMER.
955 PM CST SUN FEB 8 2015 AS WEAK BACK-DOOR COLD FRONT AND ASSOCIATED SHALLOW COOLER AIR FILTER SOUTH/SOUTHWEST ACROSS THE REGION OVERNIGHT. AS WEAK BACK-DOOR COLD FRONT AND ASSOCIATED SHALLOW COOLER AIR FILTER SOUTH/SOUTHWEST ACROSS THE REGION OVERNIGHT.
503 PM EST SUN FEB 8 2015 WEAK LOW PRESSURE WILL SPREAD SOME LIGHT RAIN OR DRIZZLE OVER THE UPPER OHIO REGION TONIGHT. PRECIPITATION WILL CHANGE TO SNOW SHOWERS WITH PASSAGE OF THE SYSTEMS COLD FRONT ON MONDAY. THE MID LEVEL TROUGH AXIS AND SURFACE FRONT ARE PROJECTED SLOWLY ACROSS THE REGION ON MONDAY. OR FREEZING DRIZZLE TO DEVELOP UNDER VERY LOW INVERSION LEVELS. TEMPERATURES ALSO ARE A PROBLEMS AS MODELS ARE IN DISPUTE ON MAGNITUDE OF COLD ADVECTION IN THE WAKE OF THE LOW.
WITH RIDGING EXTENDING WESTWARD ACROSS OUR REGION FROM BERMUDA. A COLD FRONT WAS PLUNGING SOUTHEASTWARD FROM THE MIDWEST AND GREAT LAKES STATES. WITH LIGHT SOUTHERLY FLOW IN THE LOW LEVELS BOOSTING DEWPOINTS INTO THE 45-50 DEGREE RANGE. EXPECTING ONLY A GRADUAL INCREASE IN HIGH ALTITUDE CLOUDINESS OVERNIGHT AHEAD OF BOTH THE GULF TROUGH AND COLD FRONT. RANGING TO THE LOWER 50S AT THE COAST. ONE FROM THE GULF LOW AND ANOTHER FROM THE COLD FRONT MOVING INTO SOUTHEAST GA. WEAK LOW PRESSURE OVER THE SOUTHERN GULF OF MEXICO WILL PIVOT NORTHEASTWARD ON MONDAY. CROSSING THE FL PENINSULA AHEAD OF AN APPROACHING COLD FRONT DURING THE EVENING HOURS.
901 PM EST SUN FEB 8 2015 WEAK LOW PRESSURE WILL SPREAD SOME LIGHT RAIN OR DRIZZLE OVER THE UPPER OHIO REGION TONIGHT. PRECIPITATION WILL CHANGE TO SNOW SHOWERS WITH PASSAGE OF THE SYSTEMS COLD FRONT ON MONDAY. COLDER AIR NEAR THE SURFACE SHOULD ADVECT IN AN DROP TEMPS ENOUGH TO WHERE A BRIEF PERIOD OF LIGHT FREEZING RAIN IS POSSIBLE. THE MID LEVEL TROUGH AXIS AND SURFACE FRONT ARE PROJECTED SLOWLY ACROSS THE REGION ON MONDAY. OR FREEZING DRIZZLE TO DEVELOP UNDER VERY LOW INVERSION LEVELS. TEMPERATURES ALSO ARE A PROBLEMS AS MODELS ARE IN DISPUTE ON MAGNITUDE OF COLD ADVECTION IN THE WAKE OF THE LOW.
657 PM EST SUN FEB 8 2015 A LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL MOVE ACROSS THE REGION TONIGHT INTO MONDAY MORNING.
535 PM EST SUN FEB 8 2015 A COLD FRONT WILL COME THROUGH MONDAY.
A COLD FRONT NEAR SW OREGON AT 5 PM WILL CROSS SW IDAHO 3-6 AM.
SHORT TERM: (Through Tomorrow) Cold front making its way south through the CWA this afternoon with the wind shifting to the northwest and temperatures slowly dropping off.
While have not seen reports of these echoes reaching the ground, would expect these returns to represent drizzle/freezing drizzle. Cold front continues to sag slowly southward through central Illinois this afternoon, with 20z/2pm analysis placing it just south of the I-72 corridor. End result will be a cool/overcast night with low temperatures ranging from the lower 20s far north around Galesburg to the lower 30s south of I-70.
DELAYED THE INITIAL SPREAD OF HIGHER POPS INTO THE NORTHWEST BUT KEPT THE TIMING OF THE HIGHEST POPS RELATIVELY UNCHANGED ACROSS THE FORECAST AREA. /ISSUED 640 PM EST SUN FEB 8 2015/ WHICH WILL DEEPEN TONIGHT AND PUSH A COLD FRONT ACROSS THE SOUTHEAST TONIGHT INTO MONDAY. AND AS USUAL THE NAM IS AT THE HIGHER END OF THE RANGE.
CONDITIONS WILL IMPROVE FROM NORTHWEST TO SOUTHEAST DURING THE LATE NIGHT THROUGH MORNING HOURS AS A WEAK COLD FRONT MOVES ACROSS THE AREA AND DRIES THINGS OUT. NEXT 7 DAYS PRIMARILY REMAINS A TEMP FCST WITH MEAGER MOISTURE AVAILABILITY AND UPPER RIDGING (IN GENERAL) KEEPING THINGS DRY. THE FOG MAY BECOME MORE WIDESPREAD OVER THE BAYS AND NEARSHORE WATERS LATER THIS EVENING AND OVERNIGHT AS A PREFRONTAL TROUGH APPROACHES THE COAST. THE TROUGH WILL MOVE OFF THE COAST AROUND SUNRISE MONDAY MORNING. THE ACTUAL COLD FRONT SHOULD ARRIVE BY MID MORNING AND HELP SCOUR OUT ANY LINGERING FOG.
A COLD FRONT WILL MOVE ACROSS THE AREA FROM 06Z-12Z WITH SSW WINDS BECMG NNW. WINDS ARE EXPECTED TO REMAIN GUSTY AS WE HEAD INTO THE OVERNIGHT HOURS AND A COLD FRONT APPROACHES FROM THE NORTHWEST. WE'LL REALLY BEGIN TO FEEL THE COOLER AIR MASS MONDAY NIGHT AS TEMPERATURES DROP TO AROUND 30 DEGREES.
909 PM EST SUN FEB 8 2015 A COLD FRONT WILL BEGIN TO APPROACH THE REGION OVERNIGHT AND THEN PUSH THROUGH THE AREA MONDAY EVENING.
MODELS ARE STILL IN GOOD AGREEMENT WITH A COLD FRONT SWEEPING IN FROM THE NORTHWEST DURING THE AFTERNOON ON MONDAY. THIS FRONT COMBINED WITH AN AREA OF LOW PRESSURE IN THE GULF THAT MOVES NORTHEASTWARD WILL PRODUCE INCREASING CLOUD COVER AND RAIN CHANCES MONDAY AFTERNOON THROUGH MONDAY NIGHT. INCREASING CLOUD COVER IS EXPECTED TO DEVELOP DURING MONDAY AS MOISTURE INCREASES AHEAD OF THE COLD FRONT WITH A SHOWERS LIKELY DURING THE AFTERNOON. HIGH PRESSURE RIDGING ACROSS FLORIDA WILL MOVE EAST AS A COLD FRONT MOVES INTO THE GULF AND ACROSS THE WATERS MONDAY NIGHT. HIGH PRESSURE WILL BUILD INTO THE REGION FOR MIDWEEK WITH ANOTHER COLD FRONT MOVING ACROSS THE WATERS BY THE END OF THE WEEK.
LARGE UPPER LOW CENTERED OFF THE WEST COAST THIS EVENING. SATELLITE SHOWS SEVERAL VORTICITY CENTERS ROTATING THROUGH THE LOW. ON MONDAY THE LOW MOVES NORTHWARD AND WEAKENS INTO AN UPPER TROUGH RESULTING IN A WESTERLY FLOW ALOFT. LOWERING FREEZING LEVELS WILL PRODUCE SNOW OVER THE MOUNTAINS MONDAY NIGHT.
CHANGES TO THE NEAR TERM PORTION OF THE FORECAST WERE MINIMAL AS THE AXIS OF THE HIGH AMPLITUDE EASTERN NORTH AMERICAN TROUGH HAS SHIFTED TOWARD THE COAST. CONFIDENCE IN THE SCENARIO IS MINIMAL AT MOMENT AS GFS AND ECMWF HAVE VARIED IN DEPICTIONS OF THE LOW PRESSURE TRACK OVER THE PAST SEVERAL DAYS.
COUPLED WITH WINDS IN THE 10 TO 15 KT RANGE AND TEMPERATURES IN THE LOW TO MID TEENS SHOULD KEEP WINDCHILLS ACROSS NORTHWEST TENNESSEE NEAR ZERO THROUGH NOON TODAY. WITH MUCH COLDER THAN NORMAL TEMPERATURES PREVAILING TODAY/S 00Z MODEL GUIDANCE SHOWED A NORTHWARD SHIFT IN THE LOW LEVEL FEATURES EARLY MONDAY. THIS COULD LIMIT FREEZING RAIN AND SLEET ACCUMULATION FOR THE AREAS TO THE SOUTH OF OXFORD AND TUPELO. AS SLEET AND FREEZING POTENTIAL INCREASES. A DEEP LONGWAVE TROF WILL REMAIN ANCHORED OVER SOUTHEAST CANADA.
CANCELLED WIND CHILL ADVISORY EARLY AS THE HIGH HAS SETTLED IN AND EASED THE WINDS. HIGH A WEAK UPPER TROUGH WILL REMAIN OVER THE NORTHERN PLAINS AS THE UPPER FLOW OVER SOUTHERN WISCONSIN BECOMES MORE ZONAL AND THE STRONG JET MAX MOVES OFF TO THE EAST. THE 925 MB RH INCREASES AS THE LOW LEVEL FLOW BECOMES MORE EAST. WIND CHILLS ARE STILL NEAR OR IN THE LOW END OF THE ADVISORY CRITERIA. OVER SOUTH CENTRAL WISCONSIN WINDS HAVE DECOUPLED IN MANY AREAS AS THE RIDGE BUILDS IN.
CONSIDERABLE CLOUDINESS WILL SPREAD ACROSS SOUTHERN ARIZONA TODAY AS A DEVELOPING LOW PRESSURE SYSTEM OVER BAJA CALIFORNIA MOVES EAST ACROSS NORTHWEST MEXICO.
602 AM EST SUN FEB 15 2015 HIGH PRESSURE WILL BUILD ACROSS THE GREAT LAKES TODAY INTO MONDAY.
LOW PRESSURE WILL TAKE SHAPE ACROSS THE SOUTHERN PLAINS TODAY AND SLIDE EASTWARD TONIGHT INTO MONDAY.
A STRONG COLD FRONT IS LOCATED ALONG THE RED RIVER VALLEY INTO THE TEXAS PANHANDLE.
NORTH COASTAL WILL BE COOLER DUE TO COLD SHELF WATERS AND DEVELOPING ONSHORE COMPONENT. WINDS VEERING TO 330-360/14G25KT BEHIND COLD FRONT AROUND 15Z-18Z.
805 AM MST SUN FEB 15 2015 CONSIDERABLE CLOUDINESS WILL SPREAD ACROSS SOUTHERN ARIZONA TODAY AS A DEVELOPING LOW PRESSURE SYSTEM OVER BAJA CALIFORNIA MOVES EAST ACROSS NORTHWEST MEXICO.
06Z SFC ANALYSIS HAS HIGH PRESSURE FROM MINNESOTA INTO THE LOWER MISSISSIPPI VALLEY. THIS IS THE RESULT OF AN AMPLIFIED UPPER LEVEL PATTERN WITH A WEST COAST RIDGE AND EASTERN NORTH AMERICAN TROUGH.
Experience shows this latter issue is often under-forecast as the warm layer is often warmer than anticipated. Monday morning the snow will wind down as the upper level trough axis moves east across northeast and east central Kansas.
TODAY THROUGH MONDAY NIGHT REX BLOCKING PATTERN HAS SET UP OFFSHORE THE PACIFIC COAST. UPPER TROUGH WILL STRENGTHEN ACROSS THE CNTRL CONUS MONDAY. A SERIES OF UPPER WAVES WILL CROSS THE REGION BRINGING SLIGHTLY COOLER TEMPS.
544 AM CST SUN FEB 15 2015 THE DRY ARCTIC AIR RULES WITH A LARGE AREA OF VERY DRY AIR IN THE LOW LEVELS IS KEEPING THE SNOW SEEN ON RADAR FROM REACHING THE GROUND WITH MALF BASES TO 040.
BUT LACK OF SNOW ACROSS THE AREA SHOULD LEAD TO WARMER TEMPS. HAVE SIDED WITH WARMER GUIDANCE VALUES FOR TODAY. WITH WARMER AIR TEMPORARILY WORKING INTO THE REGION SUNDAY NIGHT EXPECT TEMPERATURES TO REMAIN FAIRLY STEADY IF NOT RISE SOME THROUGH THE NIGHT. THE EXCEPTION WILL BE IN THE EAST WHERE IT WILL TAKE LONGER FOR THE WARMER AIR TO ARRIVE. LINGERING CLOUD COVER AHEAD OF THE TROUGH COULD KEEP TEMPERATURES FROM FALLING SUBSTANTIALLY. OVERALL PATTERN BEGINS WITH A STRONG RIDGE OVER THE PACIFIC WITH ANOTHER LOW OVER HUDSON BAY. COLD FRONT WILL BE NEAR NW IOWA.
AN UPPER RIDGE WILL BUILD OVER THE REGION WITH LOW LEVEL OFFSHORE FLOW DEVELOPING.
MAIN ISSUE IS LATEST MODELS SUGGEST WARMER AIR SURGING FARTHER NORTHWARD ALOFT. CHATTANOOGA AIRPORT, TN 29 22 32 27 / 10 40 100 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 26 18 30 24 / 0 30 100 70 OAK RIDGE, TN 27 17 30 23 / 10 40 100 60 TRI CITIES AIRPORT, TN 20 12 27 20 / 0 30 100 70 NC.
WITH MUCH COLDER THAN NORMAL TEMPERATURES PREVAILING TODAY/S 00Z MODEL GUIDANCE SHOWED A NORTHWARD SHIFT IN THE LOW LEVEL FEATURES EARLY MONDAY. THIS COULD LIMIT FREEZING RAIN AND SLEET ACCUMULATION FOR THE AREAS TO THE SOUTH OF OXFORD AND TUPELO. AS SLEET AND FREEZING POTENTIAL INCREASES. A DEEP LONGWAVE TROF WILL REMAIN ANCHORED OVER SOUTHEAST CANADA.
/ISSUED 526 AM CST SUN FEB 15 2015/ A COLD FRONT WILL SLOWLY FINISH PUSHING THRU SRN TX PNHDL EARLY THIS MORNING. WITH MUCH COOLER TEMPERATURES IN ITS WAKE. FEATURING AN UPPER LEVEL RIDGE ALONG THE W COAST AND A DEEP UPPER LEVEL TROF OVER THE ERN HALF OF THE U.
623 AM EST SUN FEB 15 2015 HIGH PRESSURE WILL BUILD ACROSS THE GREAT LAKES TODAY INTO MONDAY.
555 AM CST SUN FEB 15 2015 ARCTIC HIGH PRESSURE WAS HOLDING FIRM ACROSS EASTERN MN AND WI EARLY THIS MORNING. LITTLE CHANGE TO THE HIGHS TODAY WITH SINGLE DIGITS IN THE EAST TO THE TEENS WEST CENTRAL AND SOUTHWEST. LOWS MONDAY MORNING WILL BE A LITTLE WARMER THAN THIS MORNING AS SOUTHERLY LOW LEVEL FLOW PREVAILS AHEAD OF AN INCOMING TROUGH. READINGS RANGE FROM AROUND ZERO FROM EAU CLAIRE AND LADYSMITH TO THE HIGH SINGLE DIGITS ACROSS THE WEST CENTRAL. OVER THE NEXT COUPLE OF DAYS THE UPPER LEVEL PATTERN WILL AMPLIFY AS THE RIDGE BUILDS ACROSS THE WEST COAST. THIS WILL RESULT IN DOWNSTREAM TROUGHING.
1003 AM EST SUN FEB 15 2015 HIGH PRESSURE WILL BUILD ACROSS THE GREAT LAKES TODAY INTO MONDAY.
539 AM CST SUN FEB 15 2015 A COLD FRONTAL BOUNDARY HAS PASSED THROUGH KCDS SHIFTING WINDS TO THE NORTHEAST BUT WILL REMAIN LIGHT THROUGH THE AFTERNOON. THE COLD FRONT WILL GET A STRONGER PUSH THIS AFTERNOON AND EVENING BRINGING STRONG NORTHEASTERLY WINDS AT ALL TAF SITES. THE FIRST COMPLICATION WILL BE THE COLD FRONT CURRENTLY OOZING INTO THE SOUTHEASTERN PANHANDLE. A DEEPENING SURFACE CYCLONE OVER SOUTHEASTERN NEW MEXICO WILL LEAD TO PRESSURE FALLS OVER THIS AREA. SOUNDINGS CONTINUE TO POINT TO PRECIPITATION BEGINNING AS RAIN TRANSITIONING TO FREEZING RAIN AS THE LOW LEVEL COLD AIR WORKS INTO THE AREA. DRYING EXPECTED TO START MONDAY THOUGH ALSO STILL UNCLEAR HOW MUCH THE LOW CLOUD COVER WILL ERODE.
AT THE SAME TIME THOUGH IT IS DIFFICULT TO SEE THE MAJORITY OF THE MODELS AGREEING WITH THE WARMER TRENDS AND NOT BEGIN TO MAKE SOME CHANGES TO THE ORIGINAL THOUGHTS. THERE IS A DISTINCT POSSIBILITY THAT ONLY THE FAR NORTHERN ROW OF COUNTIES EVEN SEE ANY FREEZING RAIN AT ALL. ESPECIALLY WITH THE WARMER MODEL RUNS.
A DRY COLD FRONT WILL DROP IN OVER THE GREAT BASIN TODAY RESULTING IN COOLER TEMPERATURES WHICH WILL CONTINUE INTO MONDAY. HIGH PRESSURE REBUILDS INTO NEVADA FOR DRY CONDITIONS AND WARMER DAYTIME TEMPERATURES CLIMBING INTO THE 60S.
447 AM CST SUN FEB 15 2015 FORECAST MODELS HAVE BEEN TENDING WARMER IN THE LOWEST 1000 FEET & WETTER. NORTH TO SOUTH TRANSITION FROM RAIN TO FREEZING RAIN.
418 AM CST SUN FEB 15 2015 ARCTIC HIGH PRESSURE WAS HOLDING FIRM ACROSS EASTERN MN AND WI EARLY THIS MORNING. LITTLE CHANGE TO THE HIGHS TODAY WITH SINGLE DIGITS IN THE EAST TO THE TEENS WEST CENTRAL AND SOUTHWEST. LOWS MONDAY MORNING WILL BE A LITTLE WARMER THAN THIS MORNING AS SOUTHERLY LOW LEVEL FLOW PREVAILS AHEAD OF AN INCOMING TROUGH. READINGS RANGE FROM AROUND ZERO FROM EAU CLAIRE AND LADYSMITH TO THE HIGH SINGLE DIGITS ACROSS THE WEST CENTRAL. OVER THE NEXT COUPLE OF DAYS THE UPPER LEVEL PATTERN WILL AMPLIFY AS THE RIDGE BUILDS ACROSS THE WEST COAST. THIS WILL RESULT IN DOWNSTREAM TROUGHING.
THE HIGHEST QPF IN OUR SOUTHERN COUNTIES WOULD YIELD THE HIGHEST SNOW TOTALS THERE. HAVE OPTED TO USE A WATCH IN THE FAR NORTH WHERE THE FORECAST AMOUNTS ARE THE LOWEST. THE WARM LAYER ALOFT MAY CLIMB ABOVE FREEZING AND LEAD TO MIXED PRECIP IN OUR SOUTHERN COUNTIES.
COLD FRONTAL PASSAGE THIS MORNING FOLLOWED BY UNSEASONABLY COOL COLD FRONT HAS JUST PUSHED SOUTH OF THE I-10 CORRIDOR IN NE FL DURING THE MID-MORNING HOURS AND WILL BE SOUTH OF NE FL BY THE LATE MORNING HOURS. STILL EXPECT A CHALLENGING NIGHT OF TEMPS AS MOSTLY CLEAR SKIES THIS EVENING AND LIGHT WINDS WILL PROVIDE FOR DECENT RADIATIONAL CONDITIONS AND TEMPS WILL FALL INTO THE 30S/LOWER 40S QUICKLY IN MOST LOCATIONS BUT INCREASING HIGH CLOUDS AND FLOW BECOMING LIGHT EASTERLY WILL SLOWLY INCREASE MOISTURE AND SHOULD HOLD MIN TEMPS TO JUST ABOVE FREEZING ACROSS MOST INLAND LOCATIONS.
SLEET AND FREEZING RAIN WILL OCCUR OVER SOUTHERN AREAS WITH ICE ACCUMULATIONS AROUND ONE QUARTER OF AN INCH WITH POSSIBLY HIGHER AMOUNTS.
/ISSUED 447 AM CST SUN FEB 15 2015/ FORECAST MODELS HAVE BEEN TENDING WARMER IN THE LOWEST 1000 FEET & WETTER. NORTH TO SOUTH TRANSITION FROM RAIN TO FREEZING RAIN.
THE FREEZING LINE IS EDGING INTO THE REGION HAVING BACKDOORED INTO SOUTH AR. SO SOME WARMER AIR ALOFT COULD MIX DOWN. BUT WENT AHEAD AND WARNED FOR OUR NORTHERN TIER OF COUNTIES FOR FREEZING RAIN AND THEN SOME POCKETS OF SLEET INTO WASHINGTON/S BIRTHDAY AS THE COLD ALOFT DEEPENS AS WPC WINTER WEATHER DESK HAS NOT CHANGED ALL THAT MUCH OVER THE LAST DAY. THE HIGH IS FORECAST TO BUILD TO 1042MB BY MIDNIGHT BEFORE REALLY PLUNGING DOWN THE FRONT RANGE.
A WEAK DOWNSLOPING TROUGH SHOULD SWITCH WINDS TO THE NORTHWEST ON MONDAY. THE NEXT COLD FRONT ARRIVES MONDAY NIGHT.
HIGH PRESSURE WAS CENTERED OVER SOUTHWEST ONTARIO WHERE THE COLDEST AIR WAS LOCATED. WITH DEEP TROUGHING TO PERSIST ALONG THE EAST COAST/NEW ENGLAND AND GENERAL UPPER LEVEL RIDGING ALONG THE WEST COAST. AN ARCTIC COLD FRONTAL BOUNDARY WILL PERSIST MUCH OF THE WEEK.
254 AM PST Sun Feb 15 2015 Dry weather with above normal temperatures will continue through this week under high pressure ridging. Upper level ridging continues to build off of the coast. High temperatures there will be noticeably cooler this afternoon. Area temperatures are generally 2 to 8 degrees cooler than this time yesterday, with Redding being a notable exception, where northerly winds were keeping temperatures mild early this morning (58 at 2 am). Ridging will dominate this week with little change in the dry and very mild weather.
AS STRONG COLD FRONT PUSHES SOUTH. STRONG HIGH PRESSURE OVER THE WESTERN GREAT LAKES WAS RIDGING INTO SE TX. AN AREA OF LOW PRESSURE WAS LOCATED OVER EASTERN NEW MEXICO WITH A WEAK BOUNDARY EXTENDING EAST ACROSS THE RED RIVER TO NORTHERN LOUISIANA. A WEAK RIDGE OF HIGH PRESSURE WAS NOTED OVER DEEP SOUTH TEXAS WITH AN INCREASE IN 850 MB MSTR NOTED AT CRP AND BRO. A COLD FRONT WILL APPROACH SOUTHEAST TEXAS EARLY MONDAY MORNING. THE FRONT WILL CROSS THE NORTHERN ZONES EARLY MONDAY MORNING WITH THE HIGH TEMPERATURE OCCURRING VERY CLOSE TO SUNRISE WITH FALLING TEMPS THEREAFTER.
LOW PRESSURE FROM SASKATCHEWAN TO THE WESTERN BORDER OF THE DAKOTAS EARLY THIS MORNING IS FORECAST TO MOVE EAST ACROSS WESTERN AND CENTRAL NORTH DAKOTA TODAY. MODELS SUGGEST A BIT OF CLEARING JUST BEHIND THE TROUGH TO INTERRUPT THE MORE OR LESS CONTINUOUS CLOUD COVER DEPICTED BY THE MODELS FOR TODAY AND TONIGHT. 00Z GFS AND 06Z NAM SUGGEST ENOUGH INSTABILITY BEHIND THE TROUGH TO PRODUCE SOME LIGHT SNOW/FLURRIES IN THE NORTHWEST THIS AFTERNOON. LOWS TONIGHT ALSO HAVE A RELATIVELY LARGE NORTHEAST-TO-SOUTHWEST SPREAD IN TEMPERATURES - AROUND ZERO IN THE TURTLE MOUNTAINS TO THE LOWER 20S SOUTHWEST.
HIGH PRESSURE OVER THE OHIO VALLEY WILL SLIDE EAST THROUGH THE PERIOD. /ISSUED 347 AM EST SUN FEB 15 2015/ HIGH PRESSURE GRADUALLY SLIDING TO THE EAST INTO THE ATLANTIC WILL LEAD TO A SLOW WARMING TREND EARLY THIS WEEK.
345 AM MST SUN FEB 15 2015 CONSIDERABLE CLOUDINESS WILL SPREAD ACROSS SOUTHERN ARIZONA TODAY AS A DEVELOPING LOW PRESSURE SYSTEM OVER BAJA CALIFORNIA MOVES EAST ACROSS NORTHWEST MEXICO.
602 AM EST SUN FEB 15 2015 THE COLD PRESSURE RIDGE APPROACHING FORM THE NORTHWEST WILL EXTEND THROUGH THE FORECAST AREA TONIGHT. MOISTURE WILL INCREASE MONDAY AHEAD OF LOW PRESSURE TRACKING EASTWARD IN THE LOWER MISSISSIPPI RIVER VALLEY.
THIN HIGH CLOUDS ASSOCIATED WITH A RETROGRADING UPPER LOW OVER BAJA HAVE SNEAKED INTO THE FOUR CORNERS. THIS IS IN RESPONSE TO THE WESTERN RIDGE RE-AMPLIFYING JUST OFF THE WEST COAST AND A COLD UPPER TROUGH DEVELOPING OVER THE CENTRAL AND EASTERN PORTIONS OF THE COUNTRY.
526 AM CST SUN FEB 15 2015 A COLD FRONT WILL SLOWLY FINISH PUSHING THRU SRN TX PNHDL EARLY THIS MORNING. WITH MUCH COOLER TEMPERATURES IN ITS WAKE. FEATURING AN UPPER LEVEL RIDGE ALONG THE W COAST AND A DEEP UPPER LEVEL TROF OVER THE ERN HALF OF THE U.
A WEAK STORM SYSTEM OVER THE ROCKIES WILL DRAG A SURFACE COLD FRONT ACROSS THE REGION TODAY. HIGH PRESSURE WILL RETURN BY MIDWEEK.
856 AM EST SUN FEB 15 2015 TEMPERATURES ACROSS THE ISLANDS RANGE FROM THE UPPER 50S TO THE LOWER 60S. DEWPOINT TEMPERATURES IN THE LOW TO MID 50S THIS MORNING ARE ABOUT 8 DEGREES HIGHER THAN YESTERDAY MORNING. AND SOME STRATOCUMULUS SEEN ON VISIBLE IMAGERY OVER THE WATERS SURROUNDING THE LOWER KEYS.
a strong cold front will affect all terminals by 16/12Z, beginning with KHOB by 16/06Z. Have kept this lower deck VFR for now, but this may have to be changed in subsequent forecasts. A strong cold front currently stretched across Oklahoma will take its time moving south today, reaching our area tonight.
STRONG HIGH PRESSURE OVER THE WESTERN GREAT LAKES WAS RIDGING INTO SE TX. AN AREA OF LOW PRESSURE WAS LOCATED OVER EASTERN NEW MEXICO WITH A WEAK BOUNDARY EXTENDING EAST ACROSS THE RED RIVER TO NORTHERN LOUISIANA. A WEAK RIDGE OF HIGH PRESSURE WAS NOTED OVER DEEP SOUTH TEXAS WITH AN INCREASE IN 850 MB MSTR NOTED AT CRP AND BRO. A COLD FRONT WILL APPROACH SOUTHEAST TEXAS EARLY MONDAY MORNING. THE FRONT WILL CROSS THE NORTHERN ZONES EARLY MONDAY MORNING WITH THE HIGH TEMPERATURE OCCURRING VERY CLOSE TO SUNRISE WITH FALLING TEMPS THEREAFTER.
THU MORNING WILL LIKELY BE COLDER THAN WED MORNING AS HIGH PRESSURE MOVES IN. MID-LEVEL TROUGH OF LOW PRESSURE DROPPING THROUGH THE REGION TODAY THROUGH TONIGHT WILL PRODUCE VFR CLOUD COVER AT BOTH KLSE AND KRST. BUT THINKING THIS ACTIVITY WILL WEAKEN AND BECOME NONEXISTENT AS THE TROUGH MOVES INTO A DRIER AIRMASS IN PLACE OVER THE UPPER MISSISSIPPI RIVER VALLEY REGION.
HIGH PRESSURE RIDGING TO THE GULF COAST. A DRY AND DIFFUSE COLD FRONT ACROSS THE NATURE COAST. AND HIGH PRESSURE ACROSS THE SOUTHERN GULF AND SOUTH FL WILL EASE SOUTHWARD TODAY WITH THE FRONT CLEARING THE SOUTHERN COUNTIES BY AFTERNOON. TEMPERATURES WILL BE WARMER TODAY THAN ON SAT BUT STILL RUN BELOW NORMAL. HIGH PRESSURE OVER THE CENTRAL GULF OF MEXICO MOVES EASTWARD AND WILL CAUSE THE WINDS TO VEER FROM THE NORTHWEST TO THE NORTHEAST AROUND 10 TO 15 KNOTS THROUGH SUNDAY NIGHT.
AS THE RIDGE BREAKS DOWN AND THE SEA BREEZE RETURNS.
LOW PRESSURE AND AN ASSOCIATED COLD FRONT NEAR THE OHIO RIVER THIS MORNING WILL HEAD SOUTHEAST TODAY. HIGH PRESSURE IS GOING TO ARRIVE FROM THE NORTH. THE SAME HIGH PRESSURE SHOULD CONTROL HOOSIER WEATHER INTO THE WEEKEND AS ITS CENTER MOVES FROM THE UPPER LAKES TO THE SOUTHEAST COAST.
WITH MORE LOW CLOUDS UPSTREAM OVER NRN WI WITH WEAK SHORT WAVE EMBEDDED IN CYCLONIC FLOW WITH DEEPENING 50 MB TROUGH. BIG QUESTION IS WHETHER THIS UPSTREAM CLOUD DECK WILL SETTLE OVER SRN WI TODAY WITH COLD ADVECTION ON GUSTY NW WINDS BEHIND A SECONDARY TROUGH.
ONLY REAL CONCERN FOR ANY PRECIP LATE TONIGHT/INTO THU MORNING WILL BE PERHAPS A FEW SHOWERS WELL AHEAD OF THE ASSOCIATED COLD FRONT. WITH CURRENT DEW PTS TRENDING MAINLY IN THE LOWER/MID 50S RANGE. A COLD FRONT WILL THEN BEGIN TO MOVE EWD ACROSS THE AREA LATER IN THE DAY.
WITH LIGHT WINDS AND A GENERALLY CLEAR SKY OVERNIGHT LOWS SHOULD DROP INTO THE LOW TO MID 20S. WARM AND DRY CONDITIONS WILL ENSUE OVER THE AREA AS AN UPPER RIDGE OVER THE WESTERN PORTION OF THE COUNTRY WILL KEEP WNW FLOW OVER THE AREA WITH HIGH PRESSURE AT THE SURFACE.
A WARMING TREND IS UNDERWAY AND WILL PERSIST THROUGH LATE IN THE WEEK AS HIGH PRESSURE BUILDS OVER THE COAST.
137 AM EDT THU MAR 26 2015 LOW PRESSURE CROSSES THE MIDDLE OHIO VALLEY THURSDAY MORNING. THIS DRAGS A STRONG COLD FRONT THROUGH THE AREA MIDDAY AND AFTERNOON.
MUCH WARMER WEATHER WILL ARRIVE FRIDAY AS THE LL FRONTAL ZONE SHIFTS EAST. TEMPS WILL BE A LITTLE WARMER THAN YESTERDAY WITH 40S AND LOWER 50S FOR HIGHS. SAVE THE HIGHER ELEVATIONS OF THE BH AND PERHAPS NW SD WHERE COOLER BL CONDS WILL BE IN PLACE. MUCH WARMER CONDS EXPECTED WITH HIGHS IN THE 60S MOST AREAS.
HIGH PRESSURE WILL BRING A WARMING TREND TO THE REGION INTO THE UPCOMING WEEKEND. THE AXIS OF THE UPPER RIDGE REMAINS OVER THE WEST COAST STATES EARLY THIS MORNING WITH A COOL DRY NORTHERLY FLOW OVER THE CWA. EXPECT LESS CIRRUS AND A CONTINUED WARMING AIRMASS TONIGHT THRU FRI AS THE UPPER RIDGE SHIFTS INTO THE GREAT BASIN. THE RIDGE AXIS SHIFTS EAST SAT AS A WEAKENING PAC SHORT WAVE CROSSES THE NRN ROCKIES AND SENDS A LOW LEVEL COLD FRONT INTO NRN UT DURING THE AFTN.