Aikyam-Lab/Synoptic-Bench huggingface dataset:
544 PM CST WED FEB 3 2016 SURFACE MAP SHOWING LOW PRESSURE THAT GAVE THE AREA ANYWHERE FROM A COUPLE INCHES TO NEAR A FOOT OF SNOW NOW OVER SOUTHEAST ONTARIO THIS AFTERNOON. BUT LATEST VISIBLE SATELLITE IMAGERY SHOWING CLEARING WORKING IN ACROSS MN/IA AS A RIDGE OF HIGH PRESSURE BUILDS IN. BUT SHORT-LIVED AS MID CLOUD RACES IN AHEAD OF A MID-LEVEL TROUGH OF LOW PRESSURE APPROACHING THE AREA FROM SOUTHERN MANITOBA/DAKOTAS. LOOK FOR THAT MID-LEVEL TROUGH TO ROTATE SOUTHEAST ACROSS THE AREA THURSDAY AFTERNOON.
HIGHS ARE TOPPING OUT IN THE LOW TO MID 60S. LOWS TONIGHT WILL TAKE A TUMBLE TO NEAR FREEZING OR JUST BELOW. AS THE TROUGH PASSES THROUGH THURSDAY. HIGH PRESSURE THEN BEGINS BUILDING INTO THE COMMONWEALTH THURSDAY EVENING MAKING FOR A CHILLY NIGHT THURSDAY NIGHT WITH LOWS AROUND 20 DEGREES.
404 PM EST WED FEB 3 2016 COLDER AIR WILL OVERSPREAD THE REGION TONIGHT AS AN AREA OF LOW PRESSURE TRACKS NORTHEAST ACROSS QUEBEC.
STRONG HIGH PRESSURE WILL DEVELOP OVER THE REGION FOR MUCH OF THE UPCOMING WEEK.
A minor mid level trof axis will pass through the PAH forecast area today, providing enough lift to maintain a deck of low clouds during the daylight hours. Meanwhile, a second trof axis is forecast to move through our region on Thursday with little fanfare. This will be followed by ridging at the sfc and aloft. Thus, the passage of the trof axis will tend to reinforce chilly temperatures through Thursday night.
326 PM CST WED FEB 3 2016 18Z SFC DATA HAS A SEASONALLY STRONG LOW PRESSURE NEAR LAKE HURON WITH A TROF EXTENDING FROM THE STRAITS OF MACKINAC INTO EASTERN MISSOURI.
344 PM CST WED FEB 3 2016 DRY CONDITIONS WITH SLIGHTLY WARMER TEMPERATURES EXPECTED TOMORROW. THE UPPER TROUGH AXIS HAS PASSED EAST OF OUR AREA AND INTO THE GREAT LAKES WITH SUBSIDENCE AND MOSTLY CLEAR SKIES NOW DOMINATING THE CENTRAL PLAINS. THE UPPER TROUGH WILL SLIDE FURTHER EAST TOMORROW WITH INCREASING RIDGING ALOFT. THERE WILL BE A LIGHT WESTERLY DOWNSLOPE WIND THAT WITH PLENTY OF SUNSHINE WILL ALLOW FOR A MODEST WARM UP BACK TO JUST SHY OF THE FREEZING MARK IN SNOW COVERED AREAS. MITCHELL COUNTY WILL LIKELY SEE HIGHS ABOVE FREEZING GIVEN THE LACK OF SNOW IN THAT AREA.
UPDATE: Do expect a few flurries the rest of the morning across northeast Missouri into west central Illinois where the low level moisture is the deepest and there is enough ascent from a passing vort max. Otherwise looks like there will be extensive low cloudiness today in the low level cyclonic curvature.
550 PM CST WED FEB 3 2016 VFR CONDITIONS WILL PREVAIL AS HIGH PRESSURE SETTLES OVER THE REGION. ABUNDANT SUNSHINE HAS ALLOWED TEMPS TO WARM INTO THE LOWER 60S COAST AND MID 50S NORTH EARLY THIS AFTERNOON.
LITTLE MORE ROBUST RETURNS ACROSS THE NORTH CENTRAL WITH A FEW HUNDREDTHS ACCUMULATION ALONG AND NORTH OF THE HIGHWAY 2 CORRIDOR. AS THE TROUGH PUSHES OFF TO THE EAST THIS SNOW ACTIVITY IS EXPECTED TO PUSH EASTWARD THROUGH THE MORNING AND DIMINISH.
sunny and warmer. Migratory high pressure ridge builds into Kansas, with the ridge axis near the KS/CO border by 6 pm. Meanwhile, melting snow will hold temperatures down across the northern zones, with Scott/Lane/Trego counties struggling to get to the freezing mark.
NOT A BIG STORM BUT IT WILL DROP GENERALLY 1-3 INCHES OF SNOW IN THE VALLEYS AND ABOUT 5 INCHES IN THE HIGHER PASSES AND MOUNTAINS. TEMPS THURSDAY WILL RISE ABOVE FREEZING IN THE VALLEYS AND SOME OF THE SNOW WILL MELT.
TONIGHT THROUGH THURSDAY WINDS WILL INCREASE ACROSS THE AREA TONIGHT AHEAD OF A PACIFIC LOW PRESSURE TROUGH MOVING INLAND ALONG THE WEST COAST. THURSDAY NIGHT THROUGH WEDNESDAY THE TROUGH WHICH IS EXPECTED TO PRODUCE GUSTY WIND WITH ADDITIONAL LIGHT SNOW THURSDAY AFTERNOON WILL CONTINUE TO MOVE THROUGH THE AREA THURSDAY EVENING.
626 PM EST WED FEB 3 2016 THE AREA OF LOW PRESSURE TRAVELING NORTH OF THE PINE TREE STATE WILL BRING RAIN AND STRONG WINDS TO DOWNEAST MAINE TONIGHT. HIGH PRESSURE WILL RETURN WITH PARTIAL CLEARING ON THURSDAY. MSLY FOR N AND W OF A MILLINOCKET TO HOULTON LINE FOR A COUPLE OF MORE HRS OF LGT INTERMITTENT FZRA BEFORE MUCH WARMER AIR OVERTAKES THIS PTN OF THE REGION. KEPT THE HIGH WIND WARNING GOING. THE LARGEST THREAT FURTHER INLAND IS ALONG THE HIGHER HILLS. THE LOW LEVEL JET WILL QUICKLY DEPART AFTER 12Z. WITH PARTIAL CLEARING EXPECTED ON THURSDAY AS A SURFACE COLD FRONT PUSHES THROUGH THE STATE.
1145 AM CST WED FEB 3 2016 BROAD AREA OF HIGH PRESSURE WAS RIDGING ACROSS THE TAF SITES THIS MORNING WITH BREEZY NORTHWEST WIND. HIGH PRESSURE WILL SETTLE OVER NORTH TEXAS ON THURSDAY WITH LIGHT SOUTHERLY WIND RETURNING LATE IN THE AFTERNOON.
HIGH PRESSURE WILL REMAIN IN CONTROL OF THE WEATHER TONIGHT. A COLD FRONT WILL MOVE INTO THE REGION THURSDAY NIGHT AND IT WILL INCREASE THE CHANCE OF SHOWERS DURING THAT TIMEFRAME. /ISSUED 408 PM EST WED FEB 3 2016/ DRY CONDITIONS ARE EXPECTED TONIGHT AND DURING MOST OF THE DAY ON THURSDAY AS HIGH PRESSURE MOVES OFF TO THE NORTHEAST. WARM AND HUMID CONDITIONS ARE EXPECTED TO REMAIN IN PLACE OUT AHEAD OF THE APPROACHING COLD FRONT ON THURSDAY AS THE SOUTHEAST WINDS CONTINUE.
HIGH PRESSURE WILL CONTINUE TO BUILD INTO OK AND N TX THIS AFTERNOON AND TONIGHT. A MID- LEVEL TROUGH WILL MOVE QUICKLY ACROSS THE SOUTHERN PLAINS OVERNIGHT AND THIS MAY PROVIDE VARIABLE HIGH CLOUD COVER.
MORNING LOWS ACROSS THE FORECAST AREA WERE IN THE TEENS AND 20S AT THE LOWER ELEVATIONS WHILE IN THE MOUNTAINS THEY WERE MOSTLY IN THE SINGLE DIGITS TO THE LOWER TEENS.
HIGHS ON THURSDAY WILL ONLY REBOUND INTO THE LOWER TO MID 50S AS THE BASE OF THE LONG WAVE TROUGH AXIS SHIFTS OVERHEAD.
ANOTHER PUSH OF HIGH PRESSURE OVERNIGHT WILL INCREASE WINDS GENERALLY OUT OF THE N-NE AT 10-15KT THRU MID MRNG THURSDAY. SECOND PUSH OF HIGH PRESSURE MOVING IN WITH BREEZY CONDITIONS DEVELOPING ACROSS SOUTH TEXAS. BUT THE COOLER TEMPERATURES HAVE KEPT RELATIVE HUMIDITY VALUES ELEVATED.
735 PM EST WED FEB 3 2016 A STRONG COLD FRONT CONTINUES CROSSING THE AREA WILL STALL NEAR THE COAST THURSDAY.
408 PM EST WED FEB 3 2016 DRY CONDITIONS ARE EXPECTED TONIGHT AND DURING MOST OF THE DAY ON THURSDAY AS HIGH PRESSURE MOVES OFF TO THE NORTHEAST. WARM AND HUMID CONDITIONS ARE EXPECTED TO REMAIN IN PLACE OUT AHEAD OF THE APPROACHING COLD FRONT ON THURSDAY AS THE SOUTHEAST WINDS CONTINUE.
/ISSUED 320 PM CST WED FEB 3 2016/ A SECONDARY TROF AS SHOWN ON WV IMAGERY WILL SWING ACROSS THE REGION THIS EVENING INTO TONIGHT BUT WILL DO LITTLE TO AFFECT THE OVERALL WEATHER MINUS SOME CLOUDS ACROSS OUR NORTHERN ZONES. HIGH PRESSURE WILL DOMINATE AGAIN WHICH WILL CALM WINDS ACROSS MUCH OF THE FA ALLOWING FOR RADIATIONAL COOLING OVERNIGHT. THIS IN ADDITION TO AN APPROACHING UPPER LEVEL SHORT WAVE RIDGE WILL ALLOW FOR A SLIGHT WARM UP TOMORROW WITH HIGHS REACHING INTO THE LOW/MID 50S AREA WIDE. /ALDRICH LOW AMPLITUDE UA RIDGING WILL BE EXITING THE REGION TOMORROW NIGHT.
Temperatures currently range from 32-37F from I-55 nw to the lower 40s from I-70 southeast. The freezing line near Galesburg to push se toward I-72 by 23Z/5 pm. Low pressure to lift ne into western Quebec by sunset while surface and upper level trof pivot se across central and into southeast IL this afternoon. As a pair of long wave troughs pass through the region, some clipper-type systems will zip through the Midwest.
LIGHT SNOW SHOWERS ASSOCIATED WITH A WEAK VORTICITY MAX ROUNDING THE BASE OF THE 500MB TROUGH WILL MOVE OUT OF THE AREA BY THIS EVENING. SURFACE RIDGING WILL BRING LIGHT WEST WINDS IN THE MORNING. A 500MB TROUGH WITH WEAK VORTICITY ADVECTION WILL BRING LIGHT SNOW TO CENTRAL WI DURING THE AFTERNOON AND EVENING.
1126 AM MST WED FEB 3 2016 CURRENT SURFACE ANALYSIS SHOWS LOW PRESSURE OVER SOUTHERN MANITOBA. WITH TROF STRETCHING SOUTHWESTWARD ACROSS ND INTO WESTERN SD. UPPER LEVEL ANALYSIS SHOWS LARGE SCALE TROF OVER THE REGION. WITH NORTHWESTERLY WINDS BREEZY ACROSS NORTHWEST SD BEHIND THE SURFACE TROF. MAINLY THE NORTHERN BLACK HILLS AND POSSIBLY ALONG THE PINE RIDGE. TODAY THROUGH THURSDAY NIGHT UPPER LEVEL ANALYSIS HAS BROAD TROF ACROSS THE WESTERN CONUS WITH RIDGE JUST MOVING ONTO THE WEST COAST. WESTERN RIDGE WILL CROSS THE ROCKIES AND NOSE INTO THE NORTHERN PLAINS.
The ridge of high pressure that brought a reduction in precipitation today will give way to a cold front later tonight into Thursday morning.
/ISSUED 306 PM CST WED FEB 3 2016/ A chilly night is on tap for eastern Oklahoma and western Arkansas as high pressure settles overhead tonight.
231 PM CST WED FEB 3 2016 A minor mid level trof axis will pass through the PAH forecast area today, providing enough lift to maintain a deck of low clouds during the daylight hours. Meanwhile, a second trof axis is forecast to move through our region on Thursday with little fanfare. This will be followed by ridging at the sfc and aloft. Thus, the passage of the trof axis will tend to reinforce chilly temperatures through Thursday night.
THERE WAS QUITE A BIT OF SURFACE RIDGING IN NORTHERN IDAHO THAT MAY PREVENT THE GRADIENT FROM REACHING THE PROPER ORIENTATION FOR A WIND HIGHLIGHT TONIGHT.
A CLIPPER SYSTEM WITH THE CENTER OF THE LOW OVER SOUTHERN MANITOBA WILL TRACK THROUGH THE FORECAST AREA THROUGH TONIGHT. WEAK RADAR RETURNS OVER CENTRAL NORTH DAKOTA ASSOCIATED WITH THE WARM FRONT WILL MOVE THROUGH THE EASTERN CWA THIS AFTERNOON WITH LITTLE OR NO ACCUMULATION EXPECTED. COLD ADVECTION BEHIND THE COLD FRONT TONIGHT BUT WINDS AND MOSTLY CLOUDY SKIES SHOULD KEEP TEMPERATURES FROM FALLING INTO THE SINGLE DIGITS. HIGH PRESSURE MOVES ACROSS THE FORECAST AREA ON THURSDAY WITH LIGHT WINDS. COOLER IN THE EAST THURSDAY WITH HIGHS IN THE MID TEENS TO MID 20S. WARM ADVECTION RETURNS THURSDAY AFTERNOON WEST WITH HIGHS REACHING THE LOW TO MID 30S.
250 PM CST WED FEB 3 2016 Central US currently dominated by a large scale upper trof that extends from Canada to Mexico. Smaller scale pieces of energy rotating through the trof, with one noted extending from Central Nebraska southwest into SW Colorado. Lows still fall into the teens for most of the area, cooler to the far northwest where heavier snow fell. Highs progged to range from around freezing over the snow to the middle 40s in the far southeast counties.
THIS TROUGH ASSOC WITH ONE OF MANY SHORT WAVES MOVING SOUTHEAST THRU THE AREA THE NEXT 24-48 HOURS. BAND OF SNOW SHOWERS WITH THIS TROUGH MOVING EAST PRODUCING ONE HALF INCH OF SNOW IN THE NRN/CNTRL RRV. TROUGH SHOULD EXIT EASTERN CWA IN THE 12Z TO 15Z TIMEFRAME TOMORROW MORNING. INCREASED CLOUD COVER AND WESTERLY WINDS BEHIND THE TROUGH SHOULD KEEP OVERNIGHT LOWS IN THE DOUBLE DIGITS. WITH DAYTIME HIGHS TOMORROW POSSIBLY A COUPLE DEGREES WARMER THAN WE SAW TODAY.
220 PM CST WED FEB 3 2016 SURFACE MAP SHOWING LOW PRESSURE THAT GAVE THE AREA ANYWHERE FROM A COUPLE INCHES TO NEAR A FOOT OF SNOW NOW OVER SOUTHEAST ONTARIO THIS AFTERNOON. BUT LATEST VISIBLE SATELLITE IMAGERY SHOWING CLEARING WORKING IN ACROSS MN/IA AS A RIDGE OF HIGH PRESSURE BUILDS IN. BUT SHORT-LIVED AS MID CLOUD RACES IN AHEAD OF A MID-LEVEL TROUGH OF LOW PRESSURE APPROACHING THE AREA FROM SOUTHERN MANITOBA/DAKOTAS. LOOK FOR THAT MID-LEVEL TROUGH TO ROTATE SOUTHEAST ACROSS THE AREA THURSDAY AFTERNOON.
649 PM EST WED FEB 3 2016 A COLD FRONT WILL CROSS THE AREA THIS EVENING ACCOMPANIED BY A FEW SCATTERED LIGHT SHOWERS.
THE COLD FRONT HAS PUSHED EAST OF THE CWA AND COLD ADVECTION HAS BEGUN. AN UPPER TROUGH SWINGING THROUGH THE UPPER GREAT LAKES.
A large area of low clouds blankets WI/MI/IN/IL/MO and eastern IA this afternoon with an upper level trof settling into the Midwest. Forecast models track low pressure ne into central Quebec by dawn Thu while upper level trof axis moves into the MS river valley. This should keep low clouds in place over much of CWA tonight with some decrease clouds west and SW CWA later tonight with surface ridging into mid MS valley by Thu morning. Brisk west winds of 15-25 mph and gusts of 25-35 mph will veer WNW and diminish to 8-14 mph by overnight as Canadian high pressure over the central Rockies ridges toward the mid MS river valley by dawn Thu.
540 PM CST WED FEB 3 2016 DRY CONDITIONS WITH SLIGHTLY WARMER TEMPERATURES EXPECTED TOMORROW. THE UPPER TROUGH AXIS HAS PASSED EAST OF OUR AREA AND INTO THE GREAT LAKES WITH SUBSIDENCE AND MOSTLY CLEAR SKIES NOW DOMINATING THE CENTRAL PLAINS. THE UPPER TROUGH WILL SLIDE FURTHER EAST TOMORROW WITH INCREASING RIDGING ALOFT. THERE WILL BE A LIGHT WESTERLY DOWNSLOPE WIND THAT WITH PLENTY OF SUNSHINE WILL ALLOW FOR A MODEST WARM UP BACK TO JUST SHY OF THE FREEZING MARK IN SNOW COVERED AREAS. MITCHELL COUNTY WILL LIKELY SEE HIGHS ABOVE FREEZING GIVEN THE LACK OF SNOW IN THAT AREA.
747 PM EST WED FEB 3 2016 A COLD FRONT WILL CROSS PENNSYLVANIA BY LATE TONIGHT. AN UPPER LEVEL TROUGH OVER THE GREAT LAKES WILL KEEP TEMPERATURES CLOSE TO SEASONAL NORMALS FOR THE NEXT COUPLE OF DAYS. MILD AIR LINGERING AND MIXING WILL BE WEAK DESPITE THE PASSAGE OF COLD FRONT THIS EVENING. THUR LOOKS DRY AND MAINLY SUNNY FOR THE SERN HALF OF THE AREA - BUT THE LOW CLOUDS UNDER THE UPPER LOW WILL HOLD ON INTO THURS NIGHT. UPSLOPE FLOW FOR THE NEXT 36 HRS AND THEN THE PASSAGE OF THE UPPER TROUGH AND BEST ENERGY WILL LEAD TO SCT SHSN DOWNWIND OF THE LAKE AND IN THE LAURELS.
251 PM EST WED FEB 3 2016 A COLD FRONT WILL GRADUALLY MOVE EAST OF THE AREA TONIGHT. DRY HIGH PRESSURE WILL SPREAD BACK OVER THE REGION AND PERSIST INTO THE WEEKEND. RECENT SFC ANALYSIS INDICATED THAT THE COLD FRONT WAS RUNNING ALONG THE SPINE OF THE SOUTHERN APPALACHIANS. THE COLD FRONT WILL PRESS TOWARDS THE ATLANTIC COAST TONIGHT. ON THURSDAY NIGHT AN UPPER TROUGH WILL PROGRESS ACROSS THE SOUTHERN APPALACHIANS.
1038 AM MST WED FEB 3 2016 MODELS REMAIN IN GOOD AGREEMENT WITH A WEAK SHORT WAVE MOVING OVER THE HIGHER TERRAIN THIS MORNING CAUSING CONTINUED SNOWFALL FOR FAVORED AREAS. WEAK RIDGING TRIES TO BUILD IN EARLY TONIGHT BUT A MORE PRONOUNCED WAVE WILL BREAK IT DOWN VERY QUICKLY AS PRECIP LOOKS TO START NOON THURSDAY OVER ERN UT AND SPREADS ACROSS WRN CO THROUGH THE DAY. ALL MODELS SLOWED DOWN TROUGH WITH PRECIP STARTING A GOOD 6 TO 12 HRS LATER SO GOT POPS TO MATCH.
MONTANA IS CURRENTLY BENEATH A BRISK AND SOMEWHAT MOIST NORTHWESTERLY FLOW ALOFT WITH AN UPPER LEVEL RIDGE CURRENTLY OVER EASTERN WASHINGTON/OREGON.
AS HIGH PRESSURE MOVES IN. TRAILING THE MAIN COLD FRONT THAT MOVED THROUGH THE STATE YESTERDAY. THIS BOUNDARY IS RESPONSIBLE FOR USHERING IN A NOTABLY COOLER AIR MASS INTO THE STATE. WITH TEMPERATURES JUST BELOW THE FREEZING MARK IN THE NORTHWEST. HIGHS WILL BE OVER 20 DEGREES COOLER THAN YESTERDAY AND MUCH CLOSER TO SEASONAL NORMS. HIGH PRESSURE WILL BEGIN TO BUILD ACROSS THE REGION TONIGHT. AND THURSDAY SHOULD BE COOLER THAN TODAY WITH HIGHS MOSTLY IN THE 40S.
231 PM EST WED FEB 3 2016 A STRONG COLD FRONT WILL CROSS THE AREA THIS EVENING THEN STALL NEAR THE COAST THURSDAY.
227 PM CST WED FEB 3 2016 Low clouds rotating around the exiting cyclone over the Great Lakes will clear from west to east late today and tonight.
THIS WILL TIGHTEN A LEE TROUGH AND DEVELOP STRONG WINDS AT LIVINGSTON AND NYE OVERNIGHT. WIND FORECAST TRICKY OVER THE WEST AS THE TROUGH DOES SEND QUITE A BIT OF ENERGY INTO IDAHO AND THIS MAY CAUSE TOO MUCH IN THE WAY OF SURFACE PRESSURE FALLS OVER THE GREAT BASIN FOR ADVISORY LEVEL WINDS. THE SPLITTING NATURE OF THE TROUGH WILL LIMIT THE LARGE SCALE ASCENT FOR THIS SYSTEM ON THURSDAY BUT ENOUGH INSTABILITY WITH 850-500MB LAPSE RATES NEAR 8C/KM AND SOME MOISTURE FOR A FEW SHOWERS.
215 PM MST WED FEB 3 2016 WARMER HIGH PRESSURE WILL SLOWLY EDGE INTO THE REGION THE REMAINDER OF THIS WEEK ALLOWING FOR SOME MODERATION OF TEMPERATURES.
500 PM CST WED FEB 3 2016 Low clouds rotating around the exiting cyclone over the Great Lakes will clear from west to east late today and tonight.
306 PM CST WED FEB 3 2016 A chilly night is on tap for eastern Oklahoma and western Arkansas as high pressure settles overhead tonight.
337 PM EST WED FEB 3 2016 THE AREA OF LOW PRESSURE TRAVELING NORTH OF THE PINE TREE STATE WILL BRING RAIN AND STRONG WINDS TO DOWNEAST MAINE TONIGHT. HIGH PRESSURE WILL RETURN WITH PARTIAL CLEARING ON THURSDAY. KEPT THE HIGH WIND WARNING GOING. THE LARGEST THREAT FURTHER INLAND IS ALONG THE HIGHER HILLS. THE LOW LEVEL JET WILL QUICKLY DEPART AFTER 12Z. WITH PARTIAL CLEARING EXPECTED ON THURSDAY AS A SURFACE COLD FRONT PUSHES THROUGH THE STATE.
WITH SOME BANDED CU POPPING IN THE MODEST LOW LEVEL INSTABILITY PRESENT BEHIND THE COLD FRONT. CL WHILE A PASSING SNOW SHOWER CANNOT BE RULED OUT NORTH OF INTERSTATE 80 OR IN THE HIGHER ELEVATIONS OF PA/WV/MD THURSDAY EVENING. HIGH PRESSURE SHOULD BUILD INTO THE REGION AND ALLOW FOR DRY CONDITIONS.
1011 AM CST WED FEB 3 2016 COOLER AND DRIER AIR IS FILTERING INTO THE REGION ON WESTERLY WINDS AS HIGH PRESSURE BUILDS IN BEHIND THE DEPARTING SYSTEM. LINGERING SHOWERS BEHIND A DEPARTING COLD FRONT WILL MOVE EAST OF THE CWA BY SUNRISE. A SECONDARY COLD FRONT IS PUSHING INTO THE MIDSOUTH AT THIS TIME. COOLER AND DRIER AIR WILL FILTER INTO THE MIDSOUTH BEHIND THE SECONDARY COLD FRONT. THE FIRST IN A SERIES OF UPPER TROFS WILL MOVE INTO THE MIDSOUTH TONIGHT INTO THURSDAY. LITTLE IF ANY CLOUD COVER IS EXPECTED WITH THIS FIRST TROF. HIGH PRESSURE WILL BEGIN TO BUILD INTO THE AREA. LOWS WILL RANGE FROM THE MID 20S TO THE LOWER 30S.
THIS SUGGESTS ADDING THE UPPER TREASURE VALLEY TO THE WINTER WX ADVISORY FOR SNOW CURRENTLY IN EFFECT IN EASTERN OREGON AND THE LOWER TREASURE VALLEY IN IDAHO. THURSDAY WILL BE A LITTLE WARMER THAN TODAY AS UPPER RIDGE QUICKLY RETURNS AFTER TONIGHT/S TROUGH.
SECOND PUSH OF HIGH PRESSURE MOVING IN WITH BREEZY CONDITIONS DEVELOPING ACROSS SOUTH TEXAS. BUT THE COOLER TEMPERATURES HAVE KEPT RELATIVE HUMIDITY VALUES ELEVATED. HIGH PRESSURE AND DRY AIR ACROSS THE REGION WILL MAINTAIN VFR CONDITIONS THROUGH THE TAF PERIOD. HIGH PRESSURE CONTINUES TO BUILD ACROSS S TX WITH A GRADUAL DECREASE IN TEMPS/DEWPOINTS AS WELL. AM NOT EXPECTING ANY FREEZING TEMPS.
sunny and warmer. Migratory high pressure ridge builds into Kansas, with the ridge axis near the KS/CO border by 6 pm. Meanwhile, melting snow will hold temperatures down across the northern zones, with Scott/Lane/Trego counties struggling to get to the freezing mark. Late week an upper level trough will quickly cross western United States as a short wave ridge crosses the central high plains.
TEMPERATURES WILL SEE A CHANGE OVERNIGHT AS THE POTENTIAL FOR FREEZING WILL DIMINISH. WILL PREVENT ANOTHER POSSIBLE NIGHT OF FREEZING TEMPERATURES. THE ASSOCIATED COLD FRONT.
626 AM EST THU NOV 26 2015 HIGH PRESSURE OVER THE REGION WILL DRIFT EASTWARD THROUGH FRIDAY. GIVING WAY TO A COLD FRONT LATE FRIDAY NIGHT.
A BLOCKING PATTERN OVER THE PACIFIC NORTHWEST CONTINUES WITH AN UPPER HIGH OVER SOUTHERN B. AND LOW PRESSURE ALOFT IN THE GREAT BASIN AND WELL OFF THE WEST COAST.
A strong cold front will move through the area toward the end of the TAF period. Two significant weather concerns for late in the short term: Heavy rain potential for the northeastern counties, and an Arctic Strong upper low continues to dive southeast from Northern California toward Nevada early this morning. a major change is expected tonight as a strong Arctic cold front dives south across the area.
801 AM EST THU NOV 26 2015 DRY WEATHER AND WARMER TEMPERATURES CAN BE EXPECTED TODAY AND THROUGH MOST OF FRIDAY. RAIN CHANCES INCREASE FRIDAY NIGHT WITH THE PASSAGE OF A COLD FRONT. DRY CONDITIONS AND WARMER TEMPERATURES WILL CONTINUE THROUGH FRIDAY VIA SOUTHWEST FLOW. THE EASTWARD PROGRESSION OF THE COLD FRONT CONTINUES TO SLOW AS THE EASTERN RIDGE REFUSES TO GIVE GROUND.
438 AM MST THU NOV 26 2015 SNOW AMOUNTS AND POSSIBILITY OF MORE FREEZING PRECIP THE FORECAST CHALLENGES IN THE SHORT TERM. SURFACE COLD FRONT CURRENTLY DOWN OVER NORTHWESTERN COLORADO THIS MORNING. NORTHEAST LOW LEVELS WINDS AND TEMPERATURES NOW IN THE LOW TEENS UP BY DOUGLAS AND RAWLINS AND LOW 20S IN THE PANHANDLE. ECMWF AND GFS BRING UPPER LOW INTO EXTREME SOUTHWEST WYOMING/NORTHEAST UTAH BY 18Z WITH QPF BAND CURRENTLY OVER RIVERTONS AREA SHIFTING EAST. GFS SOUNDINGS SHOWING A RETURN OF POSSIBLE FREEZING RAIN/DRIZZLE TO AREAS EAST OF THE LARAMIE RANGE FRIDAY. DID INTRODUCE FREEZING DRIZZLE BACK INTO THE FORECAST FOR MUCH OF FRIDAY MORNING INTO THE AFTERNOON BASICALLY FROM CHEYENNE TO SCOTTSBLUFF AND POINTS SOUTH.
BROAD AND DEEP UPPER TROUGH SETTLING OVER THE GREAT BASIN HAS RISEN PWAT VALUES TO BETWEEN 1 AND 1. SUBTLE ADJUSTMENTS TO THE IMPACT OF SANDRA NOW HAS THE INITIAL SURGE OF PACIFIC MOISTURE TAKING A MORE INDIRECT ROUTE INTO TX AND LEADING THE A REDUCED THREAT FOR HEAVY RAIN IN ADVANCE OF THE FRIDAY COLD FRONT. THE COLD FRONT CONTINUES TO SHOW A STRONG PUSH INTO NORTH AND CENTRAL TX. LEADING TO A SHIFT TO COOLER MAXES OVER NORTHERN COUNTIES AND A MORE ABRUPT CHANGE ALONG THE FRONT. AND THERE ARE UNCERTAINTIES OVER THE LATE FRIDAY LOCATION WHICH WILL IMPACT THE HIGH TEMPERATURE FORECAST OVER THE METRO CITIES AND POINTS EAST.
THE CURRENT PRESSURE GRADIENT ON THE WESTERN SIDE OF THIS RIDGE OVER THE TENNESSEE VALLEY IS ADVECTING COOLER AIR INTO NORTHERN ALABAMA FROM GEORGIA. THIS WILL LIKELY DROP TEMPERATURES INTO THE LOWER TO MID 40S IN MOST LOCATIONS TOWARD DAYBREAK.
702 AM EST THU NOV 26 2015 STRONG HIGH PRESSURE WEDGED FROM THE CENTRAL APPALACHIANS TO THE CANADIAN MARITIMES WILL MAINTAIN DRY WEATHER WITH MODERATING TEMPERATURES INTO FRIDAY.
AND COLD UPPER LOW CENTER THAT MOVED INTO NV YESTERDAY.
THE SOUNDINGS ALSO SHOWS THE THREAT FOR FREEZING RAIN/DRIZZLE IS VERY LOW SO WILL LEAVE IT OUT OF THE GRIDS. AN UPPER LOW OVER THE SOUTHWEST CONUS WILL MOVE ONLY SLOWLY NORTH AND EAST OVER THE WEEKEND WITH THE NORTHLAND UNDER CONFLUENT FLOW ALOFT.
957 AM CST THU NOV 26 2015 LATEST SURFACE OBS SHOW TEMPERATURES WARMING QUICKLY THIS MORNING WITH MANY AREAS ALREADY IN THE LOW TO MID 60S. TEMPS COMPARED TO 24 HRS AGO ARE MUCH WARMER AS THE SOUTHERLY FLOW CONTINUES TO BRING IN MILDER AIR.
DRY NORTHEASTERLY FLOW ALOFT WILL DOMINATE THROUGH FRIDAY AS THE UPPER LOW REMAINS TO OUR SOUTH.
SOME OF THE HIGHER WIND GUSTS WILL APPROACH 30 KNOTS. MID/UPPER LEVEL HIGH PRESSURE CENTERED OVER EAST CENTRAL MEXICO WILL MIGRATE EASTWARD THROUGH THE PERIOD AND BECOME CENTERED NEAR THE CENTRAL GULF BY THE END OF THE PERIOD. AT THE LOW LEVELS.
621 AM EST THU NOV 26 2015 DRY WEATHER AND WARMER TEMPERATURES CAN BE EXPECTED TODAY AND THROUGH MOST OF FRIDAY. RAIN CHANCES INCREASE FRIDAY NIGHT WITH THE PASSAGE OF A COLD FRONT. WARM AIR ADVECTION IN THE LOWER LEVELS WILL PROVIDE ABOVE NORMAL TEMPERATURES. DRY CONDITIONS AND WARMER TEMPERATURES WILL CONTINUE THROUGH FRIDAY VIA SOUTHWEST FLOW. THE EASTWARD PROGRESSION OF THE COLD FRONT CONTINUES TO SLOW AS THE EASTERN RIDGE REFUSES TO GIVE GROUND.
DEPICT THE POSITIVELY TILTED AXIS OF A DEVELOPING TROUGH ACROSS THE WESTERN CONUS FROM NORTHEAST MONTANA TO CENTRAL CALIFORNIA. BUT THE UPPER FLOW DECELERATES TO NEAR 75 KNOTS ACROSS AN UPPER RIDGE OVER THE MISSISSIPPI VALLEY SOUTHEAST TO ALONG THE FLORIDA PENINSULA TO OVER THE KEYS. AT THE SURFACE AND IN THE LOWER TO MID LEVELS. THE 1052 MB SURFACE CENTER OF A STILL BUILDING EXCEPTIONALLY STRONG ANTICYCLONE IS NOW JUST EAST OF ATLANTIC CANADA. THE LOWER TROPOSPHERE WAS SLIGHTLY MOIST BELOW 850 MB. THE NEAR 1050 RIDGE WILL MIGRATE INTO THE NORTHWEST ATLANTIC THROUGH THE AFTERNOON AND EVENING HOURS. TEMPERATURES WILL REACH THE LOWER 80S.
340 AM MST THU NOV 26 2015 A HUGE UPPER LEVEL LOW WILL SIT OVER UTAH THURSDAY THEN RETROGRADE SOUTHWEST TO SOUTHERN CALIFORNIA AND NEVADA FRIDAY. THE SURFACE COLD FRONT WILL BE OVER SOUTHERN CO THURSDAY THEN MOVE SLOWLY SOUTH TO NEW MEXICO AND ARIZONA FRIDAY. THE CLOSED LOW WILL MEANDER ACROSS THE GREAT BASIN AS CYCLONIC FLOW (COUNTER-CLOCKWISE FLOW) CONTINUES ACROSS MUCH OF THE CWA. THIS PERIOD WILL BE RATHER UNSETTLED AS PIECES OF ENERGY ROUND THE BASE OF THE LOW PRESSURE AND AS THEY MOVE OVERHEAD.
TEMPS COMPARED TO 24 HRS AGO ARE MUCH WARMER AS THE SOUTHERLY FLOW CONTINUES TO BRING IN MILDER AIR.
While expect extensive cloud cover across the area, the strong sly flow shud help push temps warmer. Have trended slightly above the cooler guidance for today.