Aikyam-Lab/Synoptic-Bench huggingface dataset:
/ISSUED 316 AM CST WED DEC 16 2015/ UPPER LEVEL LOW WHICH BROUGHT BREEZY CONDITIONS TO THE REGION YESTERDAY CONTINUE TO EJECT INTO THE NORTHERN PLAINS THIS MORNING WITH A TRAILING TROUGH EXTENDING TO NORTHERN BAJA CALIFORNIA. THE TROUGH AXIS WILL MORE OR LESS BE OVERHEAD BY 00Z THU AHEAD OF YET ANOTHER IMPULSE DIVING ALONG THE FRONT RANGE OF THE ROCKIES. ITS TRAILING UA TROUGH WAS DRAPED ACROSS THE SOUTHERN PLAINS BUT WILL EXIT THE REGION TOMORROW WITH LITTLE FANFARE.
A BROAD WESTERN ATLANTIC RIDGE LIES ACROSS THE SOUTHERN HALF OF THE FLORIDA PENINSULA. WITH A DEEP LAYERED WESTERN ATLANTIC RIDGE ANCHORED OVER THE FLORIDA PENINSULA.
with strong cold front extending southward into Texas. Highs in the lower to middle 50s will be achieved by around midday, followed by readings dropping back into the 40s across the western CWA during the afternoon.
Excellent radiational cooling conditions tomorrow morning will result in sub freezing temperatures in all counties of the CWA, with lows mainly in the mid and upper 20s.
956 AM EST WED DEC 16 2015 LIGHT RAIN SHOWERS ARE POSSIBLE TODAY AND TONIGHT AS A LOW PRESSURE SYSTEM MOVES INTO THE AREA.
MSAS THETA-E/MSLP FIELD DEPICT A COLD FRONT OVER THE CWA WHICH IS EXPECTED TO MOVE OFFSHORE AFTER 12Z TODAY. COOLER CONDITIONS EXPECTED TODAY OWING TO CAA AND CONTINUED CLOUD COVER (MSTR TRAPPED UNDER THE FRONTAL INVERSION. ) EXPECT COLDER CONDITIONS TONIGHT/EARLY THURSDAY WITH MINIMUM READINGS IN THE LOWER TO MID 40S OVER MOST CWA LOCATIONS. EXPECT THIS CONDITION TO CONTINUE UNTIL THE FOREGOING COLD FRONT MOVES OFFSHORE AFTER 12Z TODAY. BRIEF SCA CONDITIONS MAY OCCUR OVER THE OFFSHORE COASTAL WATERS IN RESONSE TO THE FRONT/WARMER SST VALUES.
COLD FRONT IS NOW ABOUT 30 MILES OFFSHORE AND FOG HAS DISSIPATED WITH THE EXCEPTION OF A FEW PLATFORMS NEAR THE 40 MILE MARK. SECONDARY SURGE OF HIGH PRESSURE TONIGHT WILL KEEP SCA'S THROUGH THURSDAY MORNING.
300 AM PST WED DEC 16 2015 BLUSTERY DAYS AND COLD NIGHTS THROUGH THURSDAY UNDER HIGH PRESSURE.
601 AM CST WED DEC 16 2015 LOW PRESSURE SYSTEM AND ASSOCIATED PRECIPITATION ON TRACK WITH VERY MINOR ADJUSTMENTS TO PREVIOUS FORECAST. BEFORE THE NEXT ROUND OF HEAVY SNOW ARRIVES THIS AFTERNOON AS THE CENTER OF LOW PRESSURE TRACKS OVER THE TWIN PORTS AND INTO THE MN ARROWHEAD. THE SNOW MAY MIX WITH RAIN AT TIMES DURING THE AFTERNOON IN LOCATIONS ALONG THE IMMEDIATE SHORE OF LAKE SUPERIOR WHERE TEMPERATURES WILL BE SLIGHTLY ABOVE FREEZING.
WE WILL REMAIN UNDER A BROAD UPPER TROF. CLEARING WILL BE DIFFICULT UNTIL THE UPPER TROF BEGINS TO PUSH EAST.
STILL SOME FOG WILL LINGER IN THE NEXT TWO HOURS OVER THE LOWER VALLEY CLEARING BY MID MORNING AS THE FRONT MAKES ITS WAY ACROSS THE AREA. PREFRONTAL BOUNDARY WILL GRADUALLY MOVE ACROSS NORTHERN SECTIONS OF THE CWA BY DAWN AND LATE MID MORNING IN THE LOWER VALLEY. AS COOLER AIR GRADUALLY FILTERS INTO THE CWA DURING THE DAY. COOLER TEMPERATURES ARE EXPECTED EARLY THU MORNING WITH MOST LOCATIONS REACHING THE MID TO LOW 40S AND THE 50S ALONG THE COAST.
ATTENTION SHIFTS TO A WARM FRONTAL BOUNDARY THAT WILL USHER IN MODERATE TO HEAVY COASTAL AND MOUNTAIN PRECIPITATION LATE TODAY THROUGH THURSDAY. ROAD SURFACE TEMPERATURES SHOULD BE ABOVE FREEZING IN AREAS LIKE SISKIYOU SUMMIT WHEN SNOW ARRIVES LATE THIS AFTERNOON. A WINTER STORM WATCH AT WSWMFR REMAINS FOR THE POTENTIAL FOR SNOW AND FREEZING RAIN. THEN CHANGING TO FREEZING RAIN THEN RAIN IN PLACES LIKE KLAMATH FALLS AND TULE LAKE. ANOTHER LOCATION THAT MAY EXPERIENCE FREEZING RAIN IS MOUNT SHASTA CITY. ITS HARD TO IGNORE THE NAM12 FORECAST SOUNDING THAT SHOWS A CLEAR WARM LAYER ABOVE FREEZING SURFACE TEMPERATURES. MOS GUIDANCE SUGGESTS MOUNT SHASTA SURFACE TEMPERATURES WILL BE ABOVE FREEZING. WE HAVE ADDED A SLIGHT CHANCE OF FREEZING RAIN IN THIS AREA FOR THURSDAY MORNING.
430 AM CST WED DEC 16 2015 THE COLD FRONT HAS MOVED THROUGH THE AREA AND COOLER WEATHER IS EXPECTED TODAY.
1041 AM EST WED DEC 16 2015 HIGH PRESSURE WILL GRADUALLY RETREAT TO THE NORTHEAST TODAY. A COLD FRONT WILL CROSS THE AREA ON THURSDAY.
DEEP LOW PRESSURE TO GUARANTEE WINDY CONDITIONS WITH PASSAGE TODAY.
Mid/upper level system currently lifting over the upper Midwest allowing cooler air to filter in on the backside. With cooler temperatures, clear skies, and light winds lows should drop into the lower to mid 20s.
IR SATELLITE DEPICTS A MATURE CYCLONE ACROSS THE UPPER MIDWEST DRIFTING NORTH-NORTHEAST EARLY THIS MORNING. THE FRONT WILL HAVE PUSHED THROUGH THE MID- SOUTH LEAVING A MUCH COOLER AIRMASS IN ITS WAKE.
407 AM MST WED DEC 16 2015 NORTHWEST FLOW ALOFT THIS MORNING WILL TURN WESTERLY LATE THIS AFTERNOON AND EVENING AS A SHORT WAVE TROUGH MOVE SOUTH ALONG THE NORTHERN ROCKIES. ON THE BACK SIDE OF THIS TROUGH IS A FAIRLY STRONG PUSH OF CANADIAN AIR WHICH MODELS SHOW SURGING SOUTHWARD WITH A SAGGING JET MAXIMA ACROSS NORTHEAST COLORADO DURING THE LATE MORNING/EARLY AFTERNOON HOURS. WITH PASSAGE OF THE COLD FRONT FRONT DOWNSLOPE FLOW TURNS MILDLY UPSLOPE WITH GUSTY N-NELY WINDS OF 20-30KTS FOR SEVERAL HOURS ON THE PLAINS. IN THE HIGH COUNTRY. AREAS OF LIGHT SNOW AND GUSTY WINDS COULD MAKE TRAVEL A BIT DIFFICULT OVER THE HIGHER MTN PASSES.
SOME NORTHERN NEVADA VALLEYS MIGHT SEEM BRIEF FREEZING RAIN EARLY THURSDAY.
HEIGHT RISES INDICATE HIGH PRESSURE BUILDING IN THURSDAY NIGHT BUT LATEST GUIDANCE SUGGESTING PRECIP WILL MAKE IT UP AND OVER THE RIDGE AND DROP DOWN CAUSING SOME LIGHT SNOWFALL FOR THE NORTHERN MTNS.
255 AM PST WED DEC 16 2015 COLD TEMPERATURES REMAIN INTO WEDNESDAY BEFORE A WARM FRONT MOVES THROUGH WITH SNOW POSSIBLE NEAR THE OREGON BORDER AND A SLIGHT CHANCE OF FREEZING RAIN.
535 AM CST WED DEC 16 2015 DRY SLOT ROTATING AROUND THE AREA OF LOW PRESSURE OFF TO THE NORTHWEST PUSHING THROUGH THE CWA CURRENTLY.
AS HIGHER DEWPOINT AIR CONTINUES TO ADVECT NWD ATOP COOLER SHELF WATERS. LIGHT SE WINDS WILL BECOME WEST THEN NORTH AS THE SHOWERS AND COLD FRONT MOVES THROUGH. WEAK HIGH PRESSURE BUILDS IN BEHIND THE CDFNT FOR TOMORROW WITH MORE SEASONAL TEMPERATURES EXPECTED. WITH LOWS FRI NIGHT/SAT AM NEARING THE FREEZING MARK OVER INTERIOR EAST TX/CENTRAL LA.
A short period of clearing will take place, but low clouds wrapping around the low will spread back into the northwestern CWA by mid afternoon. with strong cold front extending southward into Texas. Highs in the lower to middle 50s will be achieved by around midday, followed by readings dropping back into the 40s across the western CWA during the afternoon.
A COLD FRONT WILL REACH KDHT AND KGUY AROUND MIDNIGHT TONIGHT. /ISSUED 314 AM CST WED DEC 16 2015/ COOLER CONDITIONS WILL PREVAIL THE NEXT COUPLE OF DAYS ALONG WITH A CHANCE FOR SOME LIGHT SNOW SHOWERS ON THURSDAY. COOLER AIR THAT ADVECTED IN BEHIND THIS SYSTEM WILL KEEP HIGHS IN THE 30S ACROSS THE WESTERN OK PANHANDLE AND IN THE 40S ELSEWHERE TODAY. PUSHING ANOTHER COLD FRONT THROUGH THE AREA. THIS REINFORCING SHOT OF COLD AIR WILL KEEP HIGH TEMPS IN THE LOWER 30S TO LOWER 40S.
946 AM CST WED DEC 16 2015 A COLD FRONT HAS MOVED INTO NORTHCENTRAL LA. AFTN HIGH IN THE LOWER 60S NORTH TO UPPER 60S SOUTH EXPECTED. /ISSUED 527 AM CST WED DEC 16 2015/ COLD FRONT CURRENTLY EXTENDS FROM NEAR KELD THROUGH KSHV AND KLFK TO CONTINUE MOVING E THROUGHOUT THIS WEDNESDAY. COOLER. /ISSUED 441 AM CST WED DEC 16 2015/ COLD FRONT CONTINUES STEADY EWD PROGRESS THROUGH THE REGION THIS MORNING AS IT EXTENDS ALONG A LINE FROM NEAR ELD TO SHV AND OCH.
A WARM FRONT ANALYZED OVER THE PANHANDLE THIS MORNING WILL CONTINUE TO LIFT NORTHWARD THROUGH THE DAY. WITH HIGHS REACHING UP INTO THE LOWER TO MID 80S.
THIS IN MODERATE TO STRONG WARM AIR ADVECTION IN THE LOWER LEVELS. WITH THE FIRST COLD FRONT MOVING THROUGH LATE MORNING TO MID-DAY FROM WEST-EAST. WARM ADVECTION IN THE LOWEST LEVELS AND QG FORCING SHIFT NORTHEAST DURING THE MORNING AND LEAVE THE AREA THIS MORNING AS THE OCCLUDED FRONT SHIFTS IN. AS THE UPPER LOW SHIFTS INTO AND PAST MSP THIS AFTERNOON.
427 AM CST WED DEC 16 2015 LOW PRESSURE SYSTEM AND ASSOCIATED PRECIPITATION ON TRACK WITH VERY MINOR ADJUSTMENTS TO PREVIOUS FORECAST. BEFORE THE NEXT ROUND OF HEAVY SNOW ARRIVES THIS AFTERNOON AS THE CENTER OF LOW PRESSURE TRACKS OVER THE TWIN PORTS AND INTO THE MN ARROWHEAD. THE SNOW MAY MIX WITH RAIN AT TIMES DURING THE AFTERNOON IN LOCATIONS ALONG THE IMMEDIATE SHORE OF LAKE SUPERIOR WHERE TEMPERATURES WILL BE SLIGHTLY ABOVE FREEZING.
SHORT WAVE TROUGH AND COLD FRONT FROM THE NORTH WILL BRING SNOW SHOWERS TODAY MAINLY TO IDAHO ZONES. BRIEF CLEARING AND COLDER THIS EVENING BEHIND THE TROUGH BEFORE A PACIFIC STORM COMES INLAND AND SPREADS SNOW ACROSS OREGON TOWARD MORNING AND ACROSS IDAHO THURSDAY MORNING. THE PCPN WILL BE IN A WARM-ADVECTION PATTERN AND TEMPS WILL RISE ABOVE FREEZING IN HARNEY COUNTY THURSDAY AFTERNOON WITH SNOW MIXING WITH OR CHANGING TO RAIN BELOW 4500-5000 FEET. MODELS CONTINUE TO BE IN GOOD AGREEMENT OF TROUGH OFF THE PACNW COAST CONTINUING TO DIG SOUTH AND TRANSITIONING THE AREA INTO THE WARM SECTOR.
IT IS EXPECTED TO BRING HEAVY SNOW AMOUNTS TO THE MOUNTAINS AND A MIXTURE OF SNOW AND FREEZING RAIN TO THE LOWER VALLEYS AND BASIN WHERE THERE WILL BE COLD AIR TRAPPED AT THE SURFACE. THE SNOW WILL LIKELY CHANGE TO RAIN IN CENTRAL OREGON AND POSSIBLY OVER THE SOUTHERN BLUE MOUNTAINS AS WARMER AIR WILL MOVE INTO THOSE AREAS. THE WARMER AIR WILL EVENTUALLY REACH ALL AREAS BY LATE THURSDAY NIGHT.
RAD THE LATEST WINTER WEATHER HEADLINES REMAIN IN TACT THIS MORNING AS A POTENT UPPER LEVEL LOW NOW MOVING INTO SOUTHWESTERN MINNESOTA CONTINUES TO GENERATE BANDS OF SNOW INTO SOUTH CENTRAL NORTH DAKOTA. HEAVY BANDED SNOW COMING TOGETHER AS FRONTOGENETICAL FORCING AND MAXIMUM ASCENT THROUGH THE DENDRITIC GROWTH ZONE (-12C TO -18C) WITH A PERSISTENT TROWAL SUSTAINING A WARM/MOIST FEED ALOFT PER 700MB-500MB EQUIVALENT POTENTIAL TEMPERATURE RIDGE AXIS. HIGHS TODAY WILL BE IN THE LOW TO MID 20S WITH OVERNIGHT LOWS RANGING BETWEEN 6 AND 15 ABOVE.
SW-W WINDS WILL BE BRISK OVER THE HIGHER TERRAIN CREATING BLOWING SNOW OVER MOUNTAIN PASSES. BIG FLY IN THE OINTMENT WILL BE TEMPERATURES AS GUIDANCE SUGGESTING SOME WARM AIR ADVECTION ALOFT WHICH IS BRINGING SFC TEMPS TO ABOVE FREEZING WHICH WOULD CAUSE A SWITCH TO RAIN AS MENTIONED ABOVE.
CHATTANOOGA AIRPORT, TN 51 65 56 69 / 90 50 80 80 KNOXVILLE MCGHEE TYSON AIRPORT, TN 48 63 54 69 / 90 50 80 80 OAK RIDGE, TN 49 63 55 67 / 90 50 70 70 TRI CITIES AIRPORT, TN 46 60 52 68 / 100 50 70 70.
THE FIRST IN A SERIES OF SHORT WAVE TROUGHS EMBEDDED IN THIS FLOW HAS DEPARTED TO THE NORTHEAST OF THE AREA AT THIS TIME. RESIDUAL SHALLOW WEAK LIFT IN THE LOW WARM CLOUD LAYER MAY ALLOW FOR SOME DRIZZLE TO PERSIST ACROSS THE REGION THIS EVENING.
/issued 211 PM CST MON DEC 21 2015/ A broad, low amplitude upper trough will encompass much of the ConUS through the coming week.
1020 PM EST MON DEC 21 2015 DEEP RIDGE AXIS OVER CENTERED NEAR BERMUDA AND EXTENDING BACK TO THE YUCATAN CHANNEL HAS MAINTAINED A DEEP AND BRISK 15-20KT SE FLOW THRU THE H100-H70 LYR FOR THE PAST SVRL HRS. A LOW AMP FRONTAL TROF PUSHING INTO THE LWR MS VALLEY WILL INTERACT WITH THE WRN FLANK OF THE ATLC RIDGE TO MAINTAIN A FAIRLY TIGHT PGRAD ACRS THE FL PENINSULA THAT WILL PREVENT DECOUPLING OVERNIGHT. LARGE HI PRES RIDGE CENTERED NEAR BERMUDA AND EXTENDING BACK TO THE YUCATAN PENINSULA WILL MAINTAIN A MODERATE TO FRESH SERLY BREEZE ACRS THE LCL ATLC OVERNIGHT. LCL PGRAD EXPECTED TO REMAIN TIGHT ENOUGH TO MAINTAIN THE FLOW AS A LOW AMP FRONTAL TROF OVER THE MS RIVER VALLEY INTERACTS WITH THE WRN FLANK OF THE ATLC RIDGE.
908 PM EST MON DEC 21 2015 LOW PRESSURE OVER THE CENTRAL GREAT LAKES WILL MOVE SLOWLY NORTHEAST AND REACH SOUTHERN ONTARIO BY TUESDAY MORNING AS WEAK HIGH PRESSURE BUILDS ACROSS THE OHIO VALLEY. TUESDAY NIGHT THE HIGH WILL MOVE EAST AS LOW PRESSURE MOVES INTO THE CENTRAL PLAINS.
AS GULF MOISTURE AND WARMER AIR CONTINUE TO STREAM INTO THE REGION FROM THE S. WITH THE GLOBAL MODEL RUNS HINTING AT A DEEPENING UPPER LOW/TROUGH PATTERN OUT OF THE SW STATES POSSIBLY LIFTING TO THE NE. AN EXTENSIVE BAND OF RAIN AHEAD OF A COLD FRONT IS MOVING ACROSS THE TN VALLEY AND ADJACENT AREAS THIS EVENING.
WITH HIGH PRESSURE DOMINATING. COLD FRONT WILL APPROACH THE MS/TN VLYS TUESDAY. SLIGHTLY DRIER AIR MOVES IN THE FROM SOUTH AND EAST AS DEEP LAYER RIDGE TO THE EAST INTENSIFIES. BREEZY EAST AND SOUTHEAST WIND THROUGH TONIGHT WILL PROLONG THE HIGH RISK FOR RIP CURRENTS ON ATLANTIC BEACHES.
537 PM CST MON DEC 21 2015 WITH MODELS SHOWING A LARGE BROAD TROF MAINTAINING OVER THE CONUS. PATTERN WILL FAVOR AN EVENTUAL THRUST OF CAA INTO THE LOWER 48 BY MID WEEK ALONG WITH PCPN DEVELOPMENT ASSOCIATED WITH ANTICIPATED COLD FRONT. OTHERWISE A BRIEF WARM UP TUESDAY WITH HIGHS IN THE LOW 40S NORTH AND NEAR 50 SOUTH.
836 PM CST MON DEC 21 2015 A LINE OF SHOWERS HAS DEVELOPED ALONG THE COLD FRONT THIS EVENING AND IS NEAR JACKSONVILLE TO NEWPORT AND MOVING EAST. AREAS OF FOG ARE EXPECTED IN THE EASTERN THIRD OF THE AREA AHEAD OF THE COLD FRONT. WITH THE LOW LEVELS SATURATED.
drier air and mostly clear skies will lead to much cooler overnight lows compared to last night.
AND THEN INCREASE AND BECOME GUSTY BY MID TO LATE TUESDAY MORNING AS A SFC TROF OF LOW PRESSURE DEVELOPS ALONG THE ERN SLOPES OF THE ROCKIES.
638 PM CST MON DEC 21 2015 A COLD FRONT CURRENTLY IN THE VICINITY OF OF THE I30 CORRIDOR IS CONTINUING TO PROGRESS THROUGH THE AREA. AS THE FRONT AND UPPER TROUGHS PROGRESS EASTWARD.
A COLD FRONT JUST NORTH OF THE NEVADA BORDER WILL MOVE SOUTH CHANGING RAIN TO SNOW OVERNIGHT.
This will set the stage for Tuesday to see a bit more sun and a return of warmer temperatures with southerly winds.
707 PM EST MON DEC 21 2015 SOME SHOWERS ALONG WITH AREAS OF DRIZZLE WILL PERSIST OVERNIGHT WITH LOWS PRIMARILY IN THE LOWER 40S.
906 PM CST MON DEC 21 2015 A COLD FRONT IS ON THE DOOR STEPS OF NORTHEAST ARKANSAS AT THIS TIME.
WITH A TROUGH OVER THE MS VALLEY WILL CONTINUE TO SPREAD MOISTURE INTO OUR AREA WITH UPPER SUPPORT FOR INCREASING RAIN CHANCES.
THERE HAS BEEN NO ASCAT PASSES IN THE PAST SEVERAL HOURS BUT A SHIP IN THE STRAITS SOUTH OF THE LOWER KEYS REPORTED EAST WINDS OF 24 KNOTS.
AND WITH THE LIGHT SOUTH WINDS BRINGING DEW POINTS IN THE UPPER 60S OVER WATER TEMPERATURES IN THE LOW TO MID 60S.
SFC COLD FRONT IN ASSOCIATION WITH THIS DISTURBANCE ALOFT IS NEAR A ACT. ELD LINE BEFORE STALLING EARLY TUESDAY AND EVENTUALLY LIFTING BACK TO THE NORTH AS A WARM FRONT.
955 PM EST MON DEC 21 2015 LOW PRESSURE OVER THE CENTRAL GREAT LAKES WILL MOVE SLOWLY NORTHEAST AND REACH SOUTHERN ONTARIO BY TUESDAY MORNING AS WEAK HIGH PRESSURE BUILDS ACROSS THE OHIO VALLEY. TUESDAY NIGHT THE HIGH WILL MOVE EAST AS LOW PRESSURE MOVES INTO THE CENTRAL PLAINS.
/ISSUED 539 AM CST THU JAN 14 2016/ SOUTH WINDS WILL CONTINUE TODAY AHEAD OF COLD FRONT.
LOW PRESSURE SYSTEM CROSSING THE REGION WILL BRING PCPN INTO THE NORTHWEST PORTION OF THE CWA WITHIN THE NEXT FEW HOURS.
346 PM CST THU JAN 14 2016 AREAS OF LIGHT SNOW ARE EXPECTED TO FOLLOW THE COLD FRONT INTO THE AREA FROM THE NORTHWEST THIS EVENING AND CONTINUE EAST/SOUTHEAST TONIGHT. WIND CHILLS WILL HOLD WARMER THAN ADVISORY LEVELS. COOLER ATMOSPHERE BEHIND THE BOUNDARY IS FAIRLY EFFICIENT AT PRODUCING PRECIPITATION.
A TROUGH EXTENDED FROM THE NORTHERN PLAINS. SOUTHEAST OVER THE HIGH PLAINS AND UP TO THE COLORADO FRONT RANGE. SUBSIDENCE WAS PRESENTLY OVER THE HIGH PLAINS. A LOW LEVEL JET IS EXPECTED TO SLIDE OVER THE REGION AS A TROUGH AXIS PUSHES EAST. THIS JET WILL MOVE IN BEHIND THE TROUGH AND WHAT APPEARS TO BE A COLD FRONT. FORECAST SOUNDINGS INDICATE THAT THE BOUNDARY LAYER WILL BE MIXING INTO COOLER AND COOLER AIR. MUCH COOLER WEATHER IS EXPECTED. COLD AIR ADVECTION WILL PERSIST IN THE WAKE OF TODAY'S COLD FRONT PASSAGE. HIGH TEMPERATURES SHOULD BE ON THE ORDER OF 10 TO 15 DEGREES COOLER ON FRIDAY.
HAVE BUMPED HIGH TEMPS UP A BIT TODAY BASED ON WARMER 850 MB AIRMASS TODAY IN ADDITION TO CONTINUED STRONG MIXING. WE GENERALLY HAVE HIGHS RANGING FROM THE UPPER 30S ACROSS OUR NORTHERN COUNTIES TO THE LOWER 50S IN THE SOUTH. A TRAILING COLD FRONT WILL MOVE INTO THE NORTHERN PORTION OF THE CWA LATE THIS EVENING PROVIDING ENOUGH FORCING FOR ASCENT TO GENERATE SOME LIGHT SNOW SHOWERS AS THE BOUNDARY DROPS SOUTHEAST.
A cold front will enter eastern oklahoma late tonight. Expect temperatures to top out in the lower to mid 60s. with the chances of showers increasing this evening ahead of an approaching Pacific cold front.
THESE TYPES OF WINDS WILL LIKELY CONTINUE THIS MORNING OVER AND NEAR THE HIGHER TERRAIN.
309 PM CST THU JAN 14 2016 A very warm air mass is over the region as highs in the low to middle 60s are currently being observed across the area. An upper level short wave trough and cold front are currently located across the central Plains. A cooler air mass will start to spread into the area on Friday with highs in the 40s with northwesterly winds.
1004 AM MST THU JAN 14 2016 COLD FRONT BRINGING SNOW AND A RETURN TO MORE SEASONAL TEMPERATURES IS CURRENTLY NEAR HELENA AND WILL MAKE SLOW BUT STEADY PROGRESS SOUTHWARD THROUGH THE DAY. INCREASING MOISTURE ASSOCIATED WITH A DISTURBANCE ALOFT, AND A COLD FRONT MOVING SLOWLY SOUTH, WILL RESULT IN WIDESPREAD LOW CLOUDS AND SNOW.
1045 AM MST THU JAN 14 2016 AVIATION SECTION UPDATED COLD FRONT BRINGING SNOW AND A RETURN TO MORE SEASONAL TEMPERATURES IS CURRENTLY NEAR HELENA AND WILL MAKE SLOW BUT STEADY PROGRESS SOUTHWARD THROUGH THE DAY. UPPER-LEVEL TROUGH WILL CONTINUE TO MAKE ITS WAY THROUGH CENTRAL AND SOUTHWEST MT THIS AFTN/EVE, BRINGING BROAD SWATH OF OVERCAST CLOUDS AND AREAS OF LIGHT SNOW. SURFACE COLD FRONT FROM THIS SYSTEM WAS AT KHLN AT 17Z AND SHOULD REACH KBZN IN NEXT HOUR OR TWO.
Still expect scattered showers to develop this evening within relative moist axis ahead of Pacific cold front which will sweep through the area overnight.
THIS WILL CAUSE THE HIGHS IN THE SOUTH TO COME IN A LITTLE LOWER THAN PREVIOUS FORECAST SO ADJUSTMENTS HAVE BEEN MADE. TEMPERATURES IN THE NORTHEAST WILL LIKELY HIT THE LOWS AROUND MIDNIGHT TO 3 AM AND THEN RISE THROUGH THE EARLY MORNING AS THE CLOUDS THICKEN OVER THE AREA. THE REST OF THE AREA WILL SEE LIGHTER RAIN WITH THE MAIN UPPER LOW AS IT SWINGS THROUGH FRIDAY MORNING/AFTERNOON.
LOW TEMPERATURES LAST NIGHT WERE COLD A MOSTLY BELOW NORMAL AND RANGED FROM THE MID 30S TO LOWER 40S OVER THE LOWER DESERTS. WITH WIDE RIDGE AXIS INBETWEEN /OMEGA BLOCK/. AS ENERGY /SHORT WAVES/ MOVES ACROSS THE PACIFIC AND EJECTS INTO THE BROAD RIDGE ACROSS THE WESTERN STATES.
CURRENT WATER VAPOR IMAGERY AND RAP UPPER AIR ANALYSIS INDICATES A WEAK UPPER LEVEL RIDGE IN PLACE. AN UPPER LEVEL TROUGH IS MOVING EASTWARD ACROSS TEXAS INTO THE NORTHWESTERN GULF OF MEXICO. LOWS TONIGHT WILL BE ABOUT 10-20 DEGREES WARMER THAN LAST NIGHT WITH VALUES IN THE MID 30S TO LOW 40S. THE BULK OF THE MOISTURE LOOKS TO REMAIN TO THE SOUTHEAST ACROSS THE CAROLINA CLOSER TO THE LOW TRACK. FRIDAY NIGHT WE BEGIN THE PERIOD WITH AN UPPER LEVEL TROUGH SWINGING THROUGH THE AREA WITH COLDER AIR MOVING IN AS THE TROUGH EXITS.
AHEAD OF THE LOW SOUTHERLY FLOW WILL KEEP TEMPERATURES FROM DROPPING MUCH TONIGHT. MOISTURE WILL INCREASE AHEAD OF THE LOW SO FOG IS LIKELY TONIGHT. FREEZING DRIZZLE OR FREEZING FOG IS POSSIBLE NORTH AND WEST OF MADISON.
SANDIA/MANZANO AND SOUTH-CENTRAL MT RANGES EXTENDING EASTWARD TO THE HIGH PLAINS OF CENTRAL AND EAST-CENTRAL NM.
CURRENTLY - AN AREA OF HIGH PRESSURE CONTINUES TO EMERGE OFF THE SOUTHEASTERN ATLANTIC COAST. WHILE A LOW PRESSURE SYSTEM DEEPENS IN THE NORTHWESTERN GULF OF MEXICO. THE TURNING TO A WARMER TRAJECTORY HAS BUMPED TEMPERATURES ALONG THE ISLAND CHAIN INTO THE LOWER 70S. FORECAST - THE HIGH TO OUR NORTH WILL SHIFT FURTHER EASTWARD OUT INTO THE ATLANTIC. SHOWER AND THUNDERSTORM CHANCES WILL INCREASE AS THE WARM FRONT NEARS THE ISLAND CHAIN. EXPECT WARMER THAN NORMAL TEMPERATURES DUE TO THE INCREASING WARM FLOW. RAIN CHANCES WILL DIMINISH QUICKLY LATE FRIDAY AS THE LOW RACES NORTHEASTWARD ALONG THE ATLANTIC COAST.
410 PM EST THU JAN 14 2016 CHANCES OF RAIN INCREASE LATE TONIGHT WITH OCCASIONAL RAIN ON FRIDAY AS AN UPPER LEVEL DISTURBANCE AND COLD FRONT TRACK INTO AREA. TEMPERATURES WILL BE FAIRLY STEADY OVERNIGHT AND INTO THE LOWER 40S ON FRIDAY.
POTENT UPPER LOW MOVING SWIFTLY TOWARD THE AREA THIS MORNING. WE ARE STRONGLY CONSIDERING ADDING THE LOWER TREASURE VALLEY TO THE ADVISORY AS AMOUNTS THERE WILL BE ENOUGH TO CREATE SLICK ROADS AND DANGEROUS TRAVEL CONDITIONS. COLD FRONT BROUGHT MIXED RAIN AND SNOW TO SOUTHWEST IDAHO THAT CHANGED TO ALL SNOW AROUND MIDNIGHT AND LEFT AN INCH ACCUMULATION IN THE TREASURE VALLEY.
THE LOW IS EXPECTED TO TRACK ACROSS THE FORECAST AREA FRIDAY MORNING. AS BEST WARM ADVECTION WILL BE SOUTH OF THE WARM FRONT. UPPER TROUGH WILL MOVE EAST OF THE REGION EARLY IN THE EVENING.
455 PM EST THU JAN 14 2016 WEAK HIGH PRESSURE WILL BUILD IN TONIGHT WITH LAKE EFFECT SNOWS DIMINISHING. THE HIGH'S VISIT WILL BE SHORT LIVED AS A COUPLE OF LOW PRESSURE SYSTEMS APPROACH. A WARM FRONT WILL MOVE ACROSS THE REGION FRIDAY USHERING A MILDER AIRMASS.
246 PM EST THU JAN 14 2016 HIGH PRESSURE WILL MOVE OUT TO SEA TONIGHT.
AND EVEN THE LOWER ELEVATIONS OF THE COLUMBIA BASIN COULD SEE A DUSTING OF SNOW FRIDAY MORNING. A TRANSITORY RIDGE OF HIGH PRESSURE WILL THEN BUILD INTO THE REGION DURING THE DAY FRIDAY.
1126 AM CST THU JAN 14 2016 FOR 18Z TAFS /ISSUED 1027 AM CST THU JAN 14 2016/ THE NORTHWESTERN EDGE OF AN AREA OF HIGH PRESSURE IS STILL IN CONTROL OF THE SENSIBLE WEATHER ACROSS THE TENNESSEE VALLEY. AS THE HIGH SHIFTS FURTHER SOUTHEAST. MOST AREAS WILL SEE HIGHS IN THE LOWER TO MID 50S. WITH SOME HIGHS IN THE LOWER 60S IN NW AL WHERE SOUTHWEST FLOW IS THE STRONGEST.
307 PM EST THU JAN 14 2016 WEAK LOW PRESSURE WILL MOVE ACROSS NEW ENGLAND WITH A FEW CLOUDS AND WIDELY SCATTERED FLURRIES. A RIDGE OF HIGH PRESSURE WILL NOSE INTO THE AREA FROM THE NORTH OVERNIGHT INTO FRIDAY. THE HIGH WILL GRADUALLY MOVE OFF TO THE EAST FRIDAY NIGHT WHILE LOW PRESSURE DEVELOPS TO OUR SOUTHWEST.
105 PM EST THU JAN 14 2016 HIGH PRESSURE WILL ALLOW FOR DRY CONDITIONS ACROSS THE REGION TODAY. A COLD FRONT WILL BEGIN TO APPROACH THE AREA ON FRIDAY AND MOVE THROUGH FRIDAY EVENING. DUE TO THIS HAVE TAKEN THE DRIZZLE AND FREEZING DRIZZLE OUT OF THE FORECAST HOWEVER KEPT THE INCREASE IN CLOUD COVER. WITH THE INCREASE IN CLOUD COVER WENT ON THE COOLER SIDE OF GUIDANCE TODAY. EXPECT PRECIPITATION TO HOLD OFF TONIGHT AND MOVE INTO THE REGION ON FRIDAY IN ADVANCE OF A COLD FRONT. A COLD FRONT WILL MOVE THROUGH FRIDAY EVENING INTO EARLY FRIDAY NIGHT.
1239 PM EST THU JAN 14 2016 LOW PRESSURE MOVING QUICKLY FROM THE GULF COAST TO THE CAROLINA COAST WILL BRING RAIN FRIDAY.
BUT HIGH PRESSURE WILL QUICKLY BUILD AND BRING EAST TO SOUTHEASTERLY FLOW BACK BY FRIDAY NIGHT. DESPITE BEING BEHIND A WEAK COLD FRONT.
308 PM CST THU JAN 14 2016 A COLD FRONT WILL CONTINUE TO MOVE SOUTHEAST ACROSS OKLAHOMA AND NORTH TEXAS THIS EVENING. BRINGING SOMEWHAT COOLER AIR INTO THE REGION.
1218 PM CST THU JAN 14 2016 FORECAST STILL RUNNING ON TRACK WITH THE STEADIEST SNOW FALLING ALONG THE HIGHWAY 200 CORRIDOR. MOST AVAILABLE LONG AND SHORT RANGE MODEL GUIDANCE INDICATING A BAND OF 2-4 INCH SNOWFALL ALONG AND OR JUST SOUTH OF THE HIGHWAY 2 CORRIDOR. AS THE LOW SHIFTS SE ARCTIC AIR WILL BEGIN FILTER SOUTHWARD. COULD SEE A BIT STRONGER WIND ON BACK SIDE OF THE LOW HOWEVER WIND SPEEDS SHOULD GENERALLY BE AT OR BLO 20KTS PRODUCING SOME DRIFTING AT WORSE.
340 PM EST THU JAN 14 2016 A WARM FRONT WILL LIFT NORTH OF THE STATE BY LATE AFTERNOON.
AND EVEN THE LOWER ELEVATIONS OF THE COLUMBIA BASIN COULD SEE A DUSTING OF SNOW FRIDAY MORNING. A TRANSITORY RIDGE OF HIGH PRESSURE WILL THEN BUILD INTO THE REGION DURING THE DAY FRIDAY. A WARM FRONT WILL BRING INCREASING MID AND HIGH LEVEL CLOUDS THIS AFTERNOON AT KYKM, KDLS, KRDM, AND KBDN.
1130 AM EST THU JAN 14 2016 WEAK LOW PRESSURE WILL MOVE EASTWARD ACROSS ONTARIO THIS MORNING. A WARM FRONT WILL TAKE SHAPE AND MOVE NORTHWARD ACROSS THE REGION TONIGHT AS LOW PRESSURE MOVES INTO THE WESTERN GREAT LAKES.