Aikyam-Lab/Synoptic-Bench huggingface dataset:
240 PM MST TUE FEB 2 2016 WATER VAPOR IMAGERY AND RAP 500 MB ANALYSIS SHOWS A STRONG UPPER LEVEL LOW PRESSURE AND ASSOCIATED TROUGH SYSTEM POSITIONED OVER THE CENTRAL PLAINS AND TAKING A NEGATIVE TILT AS THE SYSTEM BEGINS TO LIFT INTO THE UPPER MIDWEST STATES. THE STRONG CIRCULATION IS EVIDENT BASED ON VIS/IR SATELLITE DATA AS THE UPPER LEVEL LOW CONTINUES TO MOVE EASTWARD. A SNOW BAND MOVING SOUTH OF INTERSTATE 80 ALONG HIGHWAY 283 COULD ALSO BRING SOME ADDITIONAL SNOW UP TO AN INCH FOR NORTON AND HILL CITY AREAS THIS AFTERNOON BEFORE THE LOW CENTER MOVES EAST ENOUGH TO END THE SNOW THREAT.
316 PM EST TUE FEB 2 2016 A DEEP CYCLONE OVER NORTHERN KANSAS WILL LIFT NORTHEAST INTO SOUTHWEST WISCONSIN AND WEAKEN BY WEDNESDAY MORNING. THE WARM FRONT ASSOCIATED WITH THIS SYSTEM WILL LIFT UP ACROSS THE AREA THIS EVENING WITH NUMEROUS SHOWERS AND EMBEDDED THUNDERSTORMS. THE COLD FRONT ASSOCIATED WITH THE LOW WILL SWEEP EASTWARD ACROSS THE AREA OVERNIGHT CAUSING ANOTHER ROUND OF SHOWERS AND POSSIBLY THUNDERSTORMS. DEEP LYRD CYCLONE OVR NRN KS THIS AFTN WILL OPEN EWD AND DEAMPLIFY SHRT TERM. SOME LAKE ENHANCED SNOW SHOWERS EXPECTED WED NIGHT INTO THURS MORNING AS THERMAL TROUGH ADVECTS OVER THE AREA AMID LINGERING MOISTURE AND CYCLONIC FLOW. WINDS BACK TO THE SW BY THURS AFTERNOON WITH LOWERING INVERSION AS MIDLEVEL TROUGH AXIS PASSES OVERHEAD. SOME LATE DAY WAA SHOULD PUSH HIGH TEMPS INTO THE LOW 30S.
KEPT MARQUETTE AND GREEN LAKE COUNTIES IN A WARNING TO ACCOUNT FOR THE ONGOING SNOW AND POTENTIAL FOR FREEZING DRIZZLE. DOWNGRADED THE REST OF THE WARNING TO ADVISORY SINCE THERE IS STILL A SMALL POTENTIAL FOR FREEZING DRIZZLE. TEMPERATURES WILL BE RIGHT AROUND FREEZING. SO PATCHY FREEZING DRIZZLE IS POSSIBLE. EXPECT MIXED PRECIP TO CHANGE OVER TO RAIN THIS EVENING WITH TEMPERATURES JUST ABOVE FREEZING. GIVEN PAVEMENT TEMPS WILL BE AROUND FREEZING. LIGHT SNOW SHOWERS IN THE WRAP-AROUND REGION OF THE LOW WILL HOLD OFF UNTIL EARLY WED MORNING. EXPECTING LOW TO MID LEVEL FRONTOGENESIS IN THE DEFORMATION ZONE OUT AHEAD OF A POTENT VORT MAX ROUNDING THE BASE OF THE 500MB TROUGH.
1056 AM CST TUE FEB 2 2016 WINDS HAVE ALREADY STARTED MIXING OVER THE PAST COUPLE OF HOURS WITH WINDS AT ALL TERMINALS BEING SUSTAINED NEAR THE 20 KNOT RANGE WITH GUSTS OCCASIONALLY REACHING INTO THE LOW 30 KNOT RANGE. A COLD FRONT CURRENTLY LOCATED OVER THE OK PANHANDLE WILL CONTINUE TO PUSH SOUTHWARD AND MOVE THROUGH THE REGION BY THE LATE AFTERNOON. COLD FRONT PASSAGE EXPECTED EARLY TO MID AFTERNOON BUT PROBABLY WONT PRODUCE SIGNIFICANT DIRECTION CHANGES OR TOO MUCH OF A WIND SPEED INCREASE. /ISSUED 354 AM CST TUE FEB 2 2016/ COOL DRY AND BREEZY ON TRACK TODAY ON THE BACK SIDE OF THE STRONG UPPER LOW OVER WESTERN KANSAS THIS MORNING MOVING NORTHEAST INTO THE UPPER MISSISSIPPI VALLEY BY EARLY WEDNESDAY.
The next low pressure system will be quick on its heels, moving through NorCal midday Wednesday through Wednesday night. This next system is forecast to be a bit wetter than today's, but not by much as it too will be weakened by the eastern Pacific ridge. High pressure will begin to build into California more strongly late this week into the weekend.
TODAY THROUGH WEDNESDAY NIGHT UPPER LEVEL ANALYSIS HAS VIGOROUS CLOSED LOW OVER SOUTHWEST KANSAS WITH BROAD TROF ACROSS MUCH OF THE WESTERN CONUS. LOW PRESSURE IS LOCATED ACROSS SOUTH CENTRAL KANSAS AND HIGH PRESSURE RESIDES ACROSS SOUTH CENTRAL CANADA INTO THE FAR NORTHERN PLAINS. UPPER LOW WILL CONTINUE TO SHIFT NORTHEAST INTO EASTERN NEBRASKA BY LATE THIS AFTERNOON. UPPER LEVEL LOW WILL LIFT INTO THE GREAT LAKES REGION AS THE BROAD WESTERN TROF SHIFTS ACROSS THE NORTHERN PLAINS. MAIN UPPER TROF CONTINUES TO TREK EAST WEDNESDAY NIGHT. WITH RIDGING CROSSING THE ROCKIES LATE WEDNESDAY NIGHT.
500MB ANALYSIS SHOWS THE UPPER LOW MOVING QUICKLY INTO WESTERN KANSAS WITH CLOUD TOPS BEGINNING TO WARM ACROSS SOUTHEAST WYOMING. RIDGE AXIS OVERHEAD BY THAT TIME.
OR SECONDARY COLD FRONT. AS THIS TROUGH AXIS APPROACHES NORTH/CENTRAL TEXAS. WITH AREAS NORTHWEST OF A COMANCHE TO SHERMAN LINE DROPPING NEAR/BELOW FREEZING.
342 PM CST TUE FEB 2 2016 (Tonight and Wednesday) A powerful upper-level trough continues to lift northeast into the Upper Midwest this afternoon. This system brought the Pacific cold front through the area yesterday evening. A secondary cold front will move south across the area tonight, shifting winds to the north. Wind speeds will generally remain below 10 mph, but may briefly gust over 15 mph for an hour or two behind the cold front. Temperatures will remain rather cool, with afternoon highs ranging from the upper 40s in the Big Country to the lower 50s across the Concho Valley and I-10 corridor.
434 PM EST TUE FEB 2 2016 A STRONG LOW PRESSURE CENTER WILL TRACK FROM THE UPPER MIDWEST THROUGH THE GREAT LAKES REGION THIS EVENING AND OVERNIGHT. A COLD FRONT TRAILING THE SYSTEM WILL CROSS THE OHIO VALLEY WEDNESDAY EVENING.
DEEP LAYER HIGH PRESSURE TO OUR EAST WILL CONTINUE TO DRIVE THE WEATHER INTO WEDNESDAY AS WE REMAIN ON ITS WESTERN PERIPHERY. THE RIDGE WILL SIGNIFICANTLY SLOW DOWN THE PROGRESS OF THE SYSTEM MOVING THROUGH THE DEEP SOUTH, KEEPING THE FORECAST RELATIVELY DRY AND SOMEWHAT SUPPRESSED, THROUGH WEDNESDAY NIGHT. SOUTHEASTERLY FLOW AROUND THE RIDGE WILL CONTINUE TO BRING IN A WARM AND HUMID AIRMASS, WITH HIGHS IN THE LOW-MID 80S AND LOWS IN THE MID-UPPER 60S OVER THE INTERIOR/GULF COAST AND LOW 70S ALONG THE EAST COAST. THE HIGHER THAN NORMAL LOW LEVEL HUMIDITY WILL KEEP THE THREAT FOR FOG IN THE FORECAST TONIGHT, AND POSSIBLY AGAIN WEDNESDAY NIGHT.
Mature cyclone near Omaha accelerating away from SW KS. Northern areas on the snowpack will fail to reach freezing Wednesday afternoon.
1114 AM CST TUE FEB 2 2016 Water vapor imagery showing strong negatively tilted upper trough spinning across the Southern High Plains this morning.
1058 AM MST TUE FEB 2 2016 500MB ANALYSIS SHOWS THE UPPER LOW MOVING QUICKLY INTO WESTERN KANSAS WITH CLOUD TOPS BEGINNING TO WARM ACROSS SOUTHEAST WYOMING. RIDGE AXIS OVERHEAD BY THAT TIME.
WEST AND NORTHWEST FLOW MIXING IN LOW DEWPOINTS (DOWN INTO THE TEENS) AND TEMPERATURES UP INTO THE LOWER TO MID 70S. COLD FRONT SWINGS EAST AWAY FROM THE AREA THIS EVENING AND COLD FRONT MOVING THROUGH THE KS/OK/NWTX THIS AFTERNOON SHOULD ARRIVE IN SETX AROUND 2 AM WEDNESDAY NEAR CLL AND BE OFF THE COAST BY 8 AM OR SO.
/ISSUED 1148 AM CST TUE FEB 2 2016/ COMPACT DEEP CLOSED MID-LEVEL LOW PRESSURE CENTER OVER NORTH CENTRAL KANSAS AT THIS TIME WILL CONTINUE TO LIFT NORTHEAST OF THE FORECAST AREA. WRAP-AROUND MOISTURE ASSOCIATED WITH LOW PRESSURE CENTER EXPECTED TO KEEP MVFR CEILINGS AT KGUY THIS AFTERNOON. A COLD FRONT WILL PUSH SOUTH THROUGH THE AREA THIS MORNING. /ISSUED 308 AM CST TUE FEB 2 2016/ THE UPPER LOW WHICH BROUGHT RAIN TO THE BETTER PART OF THE COMBINED PANHANDLES YESTERDAY HAS CONTINUED ITS EAST-NORTHEAST TRACK JUST NORTH OF THE OKLAHOMA PANHANDLE THIS MORNING. NOW THERE STILL REMAINS A CHANCE FOR SNOW FLURRIES LATER ON THIS MORNING AS A COLD FRONT DROPS OUT OF COLORADO AND SWEEPS ACROSS THE PANHANDLES. ALL FLURRIES SHOULD END AS THE UPPER LOW MOVES INTO IOWA.
312 PM CST TUE FEB 2 2016 SURFACE MIXING HAS BEEN UNDERWAY FOR SEVERAL HOURS NOW ACROSS THE REGION MIXING ALONG WITH AN APPROACHING COLD FRONT HAS RESULTED IN FAIRLY GUSTY WINDS TODAY. THE COLD FRONT IS AT THE EDGE OF THE SOUTHERN TEXAS PANHANDLE AS OF 20Z. SURFACE PRESSURE GRADIENT WILL RELAX OVERNIGHT MAKING WAY FOR HIGH PRESSURE WHICH WILL CALM WINDS A GOOD BIT WITH THE LIGHTEST WINDS OCCURRING ALONG THE TX/NM STATE LINE. LOWS BY TOMORROW MORNING ARE EXPECTED TO BE IN THE LOW TO MID 20S AREA WIDE WITH THE EXCEPTION OF OUR NORTHWEST COUNTIES WHICH WILL SEE LOWS IN THE MID TO UPPER TEENS.
Strong NW flow aloft to persist through tonight, with a couple of weak surface reflections along a quasi inverted trof moving SE this afternoon and tonight. Mid trop heights will rise Tue-Wed with high pressure returning, resulting in quiet wx.
HIGH PRESSURE WILL REMAIN IN CONTROL TODAY THROUGH TUESDAY.
CLOUDS ARE ALSO RAPIDLY CLEARING THE AREA AS COOLER AND DRIER AIR MOVES IN ON STRONG AND GUSTY WNW WINDS.
High pressure remains over Idaho and western Montana this morning and has helped to bring fog into stable valley locations. The warm airmass aloft that has accompanied the high pressure has left the terrain warm overnight as well as higher north-south oriented valleys e. Valleys that remain stable like Salmon will begin to see air quality issues today and Tuesday as high pressure maintains with fog to again be an issue for Tuesday morning.
952 AM EST MON JAN 26 2015 LOW PRESSURE OVER SOUTHERN WEST VIRGINIA WILL MOVE TO THE CAROLINA COAST. ARCTIC HIGH PRESSURE WILL BUILD IN FROM THE WEST THROUGH TUESDAY.
601 AM EST MON JAN 26 2015 LOW PRESSURE OVER SOUTHERN WEST VIRGINIA WILL MOVE TO THE CAROLINA COAST. ARCTIC HIGH PRESSURE WILL BUILD IN FROM THE WEST THROUGH TUESDAY.
403 AM CST MON JAN 26 2015 H5 ANALYSIS ACROSS THE CONUS TONIGHT HAS A DEEPENING TROUGH OF LOW PRESSURE OVER THE OHIO VALLEY SWD TO THE GULF COAST. FURTHER WEST HIGH PRESSURE WAS ANCHORED OVER NERN NEVADA WITH A RIDGE EXTENDING NWD INTO BRITISH COLUMBIA AND ALBERTA. A WARM FRONT EXTENDED FROM AROUND ONEILL SSW TO AROUND LEXINGTON AS OF 2 AM CST. THE MAIN FORECAST CHALLENGE OVER THE NEXT 24 HOURS IS TEMPERATURES AS A RIDGE OF HIGH PRESSURE ALOFT BUILDS EAST OF THE INTERMOUNTAIN WEST. 500 MB RIDGE AXIS OVERHEAD TUESDAY AFTERNOON WITH 850 MB TEMPS IN THE MID TO UPPER TEENS C. COLD FRONT TO WORK ACROSS THE AREA TUESDAY NIGHT WITH 850 MB TEMPS TO BEGIN TO FALL.
729 AM EST MON JAN 26 2015 LOW PRESSURE OVER SOUTHERN WEST VIRGINIA WILL MOVE TO THE CAROLINA COAST. ARCTIC HIGH PRESSURE WILL BUILD IN FROM THE WEST THROUGH TUESDAY.
635 AM CST MON JAN 26 2015 PATCHY LIGHT SNOW CONTINUES TO TRACK SOUTHEAST ACROSS EASTERN MINNESOTA EARLY THIS MORNING IN ADVANCE OF A NORTH-SOUTH ORIENTATED WARM FRONT LOCATED ROUGHLY FROM STAPLES TO HUTCHINSON AND ALBERT LEA. NO FREEZING DRIZZLE HAS BEEN REPORTED YET. THE WARM FRONT WILL CONTINUE MAKING STEADY PROGRESS EAST THROUGH THE MORNING BEFORE STALLING NEAR THE MN/WI BORDER THIS AFTERNOON. ECMWF APPEARS CLOSEST TO REALITY IN THIS REGARD AND IS A GOOD 5-10 DEGREES WARMER THAN THE NAM AND GFS.
305 AM PST MON JAN 26 2015 THE RIDGE OF HIGH PRESSURE WILL DRIFT FROM NORTHERN CALIFORNIA TO THE FOUR CORNERS REGION TODAY.
845 AM EST MON JAN 26 2015 A COLD FRONT HAS PUSHED TO THE SE. SOME MID LEVEL MOISTURE WILL WRAP AROUND RAPIDLY INTENSIFYING LOW PRESSURE AS IT DEPARTS TO THE NE.
331 AM MST MON JAN 26 2015 THE EAST PACIFIC REX BLOCK IS BEGINNING TO BREAK DOWN WITH THE ARRIVAL OF UPSTREAM TROUGHING. WITH THIS NEGATIVE TILT IT WILL BE RATHER STUBBORN TO PUSH EASTWARD AND THE UPPER LOW OFF THE BAJA COAST WILL BE FORCED NORTHWARD INTO CALIFORNIA OVERNIGHT. SUBSIDENCE AND DRY AIR UNDER THE RIDGE WILL BE HARD TO OVERCOME. SOME OF THE HIGH COUNTRY WILL PROBABLY SEE SOME SHOWERS AT THE HIGHER ELEVATIONS. CLOUD COVER TOMORROW AND SLIGHTLY COOLER TEMPERATURES MOVING IN ALOFT WILL PUSH HIGHS DOWN BACK SEVERAL DEGREES FOR TUESDAY. EACH MODEL RUNS SHOWS LESS QPF AS BAJA CALIFORNIA SHORT WAVE ENCOUNTERS STRONG RIDGE AXIS.
THIS IS IN LINE WITH PREVIOUS FORECAST AS WE ARE STILL UNDER THE INFLUENCE OF THE STRONG RIDGE.
HIGH PRESSURE IS SITUATED OVER TX WITH A TROUGH EXTENDING FROM SOUTHERN MANITOBA INTO THE NORTHERN PLAINS. STRONG UPPER RIDGING WILL SLOWLY SLIDE EAST TODAY AND TONIGHT AND WILL BE OVER THE ROCKIES BY TUE MORNING. THE MAIN AFFECT THIS FEATURE WILL HAVE WILL BE TO PUSH A WEAK COLD FRONT THROUGH THE FORECAST AREA. BY THU MORNING THE COLD FRONT IS EXPECTED TO BE THROUGH THE FORECAST AREA WHICH WILL BRING CLOSER TO NORMAL TEMPS WITH HIGHS IN THE 40S. THE BIG DIFFERENCE BETWEEN THE MODELS IS THAT THE ECMWF PHASES THE SOUTHERN STREAM ENERGY WITH THE MEAN TROUGH WHILE THE GFS KEEPS THE SOUTHERN ENERGY CUTOFF.
UPPER RIDGE REMAINS LOCKED OVER THE WESTERN U. WHILE AN UPPER LOW OFF THE BAJA IS STARTING TO LIFT NORTHWARD. THOUGH SE OREGON AND THE LOWER TREASURE VALLEY WON/T LOSE THE LOW OVERCAST. CLOUDS WILL INCREASE ON TUESDAY AS THE UPPER LOW NEAR BAJA IS DRAWN INTO NORTHEAST NV BY AFTERNOON. SHOWERS ACCOMPANYING THE LOW WILL SPREAD NORTH OF THE NV BORDER EARLY TUESDAY AFTERNOON. FROM UPPER LOW WITH ORIGINS IN THE BAJA OF MEXICO.
/ISSUED 300 AM CST MON JAN 26 2015/ WITH UNSEASONABLY STRONG UPPER RIDGING ALOFT.
HIGH PRESSURE WILL CONTINUE TO SETTLE IN ACROSS SOUTH TEXAS. STRONG HIGH PRESSURE WILL BUILD ACROSS THE AREA IN THE NEXT 24 HOURS. AMPLIFIED RIDGE ACROSS THE WEST WILL MOVE INTO THE CENTRAL AND SOUTHERN PLAINS DURING THE SHORT TERM PERIOD WHILE CUT OFF LOW OVER THE PACIFIC COAST MOVES INLAND. THIS LOW WEAKENS INTO AN OPEN WAVE AS IT LIFTS NORTHEAST MONDAY INTO TUES INCREASING THE MOISTURE CONTENT AND AS A RESULT INCREASE CLOUD COVER ACROSS S TX. THIS CLOUD DECK WILL LIMIT TEMPERATURES TO COOL DOWN INTO THE LOWER 40S IN THE EARLY MORNING HOURS. RIDGE WILL BE CENTERED OVER THE CENTRAL PLAINS INTO TUES WHICH WILL KEEP LIGHT WINDS ACROSS THE AREA.
656 AM EST MON JAN 26 2015 LOW PRESSURE WILL QUICKLY MOVE AWAY FROM THE REGION THIS MORNING. HIGH PRESSURE WILL THEN BUILD IN THROUGH THE MIDDLE OF THE WEEK.
547 AM EST MON JAN 26 2015 WINDS INCREASING THIS MORNING, WITH SOME 30 KT GUSTS AS COLD FRONT OVER NORTH FLORIDA CROSSES THE PENINSULA BY THIS EARLY AFTERNOON.
ALLOWING WARMER AIR IN THE EASTERN SLOPES OF THE ROCKIES TO SPREAD EASTWARD AGAIN. WINDS WILL BECOME NORTHWESTERLY BEHIND THE TROUGH AND BECOME SOMEWHAT BREEZY THROUGH THE AFTERNOON HOURS. MOS GUIDANCE HAS GENERALLY HAD A COOL BIAS THROUGH THE LAST FEW DAYS SO I HAVE BUMPED MAX TEMPERATURES UP A FEW DEGREES OVER THE WARMER MAV MOS GUIDANCE. HIGHS SHOULD TOP OUT AROUND 70 OR THE LOWER 70S. WINDS WILL DECREASE AGAIN THIS EVENING AND GRADUALLY COME AROUND TO THE SOUTHWEST AS ANOTHER LEE SIDE TROUGH DEVELOPS OVER FAR EASTERN COLORADO. TEMPERATURES SHOULD DROP INTO THE MID AND UPPER 30S AGAIN TONIGHT GIVEN THE WARMER AIRMASS AND DOWNSLOPE COMPONENT TO THE WINDS.
939 AM EST MON JAN 26 2015 FAST MOVING LOW PRESSURE SYSTEM WILL CROSS THE REGION TODAY WITH ISOLATED LIGHT SHOWERS AND BREEZY CONDITIONS.
AN UPPER RIDGE WILL SLOWLY BUILD OVER THE REGION TONIGHT THROUGH TUESDAY AND REMAIN THROUGH WED.
WITH HIGHS ON WED SPANNING THE LOW TO MID 50S. LOWS WED NIGHT MAINLY IN THE LOWER 30S. LOWS THU NIGHT ARE EXPECTED TO BE AROUND FREEZING.
A VERY DRY ATMOSPHERE IN THE LOWER LEVELS PERSIST SO NO LOW CIGS OR FOG IN THE PICTURE.
An upper level trough has been responsible for rain and snow showers across the region today.
1240 AM EST TUE JAN 20 2015 HIGH PRESSURE BUILDS ACROSS THE SOUTHEAST COAST THROUGH EARLY TUESDAY.
1012 PM PST MON JAN 19 2015 High pressure will build into the region tonight and last through mid week. With low temperatures dropping into the mid to upper 20s freezing fog is likely which could lead to slick roads for the Tuesday morning commute. For tomorrow, latest guidance is coming in a bit warmer for the Wenatchee and Moses Lake areas. For now highs were increased at Wenatchee given mild evening temps in the lower 40s and with high confidence of no stratus tomorrow to hold temps down.
quick look at SPC Rapid-Refresh meso fields show beautiful thermal ridging directly overhead on both the 925/850 hourly analyzes. region remains embedded in broad northwest flow aloft as ridging continues to build across the northern Pacific. Cold air advection /albeit fairly weak/ to get underway overnight behind aforementioned front/trough that should be well east of the area by morning. With 850 temps anywhere between 6-9 degrees cooler than today. high temps will definitely be cooler with upper 40s to lower 50s expected. upper closed low to begin diving south towards our region in persistent northwest flow.
HIGH PRESSURE IS SETTLING IN OVER THE REGION TONIGHT. WEST SIDE VALLEY FOG AND FREEZING FOG COULD BECOME DENSE TONIGHT.
BUT THIS WILL BE SHORT LIVED AS ANOTHER COLD FRONT MOVES THROUGH TOWARDS MIDNIGHT.
1249 AM EST TUE JAN 20 2015 LOW PRESSURE WILL NOSE INTO THE NORTHERN OHIO VALLEY FROM THE UPPER MIDWEST ON TUESDAY.
EXPECT AREAS OF -SN AND ISOLATED -ZR/-ZL TO DIMINISH THROUGH THE EARLY MORNING AS WEAK TROF AND LOW LEVEL FRONTOGENETICAL FORCING SLIDES OFF TO THE EAST.
1225 AM EST TUE JAN 20 2015 VFR CIGS BKN250 WILL PERSIST THROUGH MUCH OF THE FORECAST AS A MID LEVEL TROUGH PASSES ACROSS SOUTH FLORIDA. /ISSUED 721 PM EST MON JAN 19 2015/ HIGH PRESSURE DOMINATES TONIGHT. BUT STILL SHOULD BE ABOUT 5 DEGREES WARMER THAN LAST NIGHT. THE SATELLITE IMAGERY ALSO INDICATES A BROAD AREA OF LOW PRESSURE IN THE CENTRAL GULF. THE LATEST GLOBAL MODEL GUIDANCE INDICATES THE AREA OF LOW PRESSURE IS FORECAST TO DRIFT TO THE NORTHEAST INTO THE EASTERN GULF INTO TUESDAY AND IS FORECAST TO BRING INCREASING MOISTURE AND CLOUDINESS INTO SOUTH FLORIDA AND ADJACENT WATERS ON TUESDAY. THE GUIDANCE INDICATES A MID-LEVEL SHORT WAVE TROUGH MAY BE POSSIBLE ACROSS THE EASTERN GULF TONIGHT BUT BY TUESDAY AFTERNOON THE TROUGH ORIENTATION MAY FAVOR DYNAMICS MAINLY FORECAST TO BE NORTH OF LAKE OKEECHOBEE.
1242 AM EST TUE JAN 20 2015 LINGERING SNOW SHOWERS AND FLURRIES WILL COME TO AN END ACROSS THE AREA DURING THE EARLY MORNING HOURS AS BROAD HIGH PRESSURE BUILDS INTO THE REGION. THIS HIGH WILL ESSENTIALLY CONTROL REGIONAL WEATHER CONDITIONS FOR THE REMAINDER OF THE WORK WEEK AND BEYOND. HIGH PRESSURE AND A SEASONABLY COLD CONTINENTAL POLAR AIR MASS.
TEMPERATURES WILL BE A BIT COOLER WITH HIGHS IN THE 40S WHICH IS STILL ABOVE AVERAGE FOR THIS TIME OF YEAR.
AS HIGH PRESSURE TO THE SE MOVES EWD INTO THE SRN ATLANTIC BASIN. AS WEAK HIGH PRESSURE BRIEFLY RETURNS TO THE SE REGION IN THE WAKE OF THE FRONTAL PASSAGE FROM TUE NIGHT. WITH THE LATTER HALF OF THE GLOBAL MODELS STILL POINTING TOWARD A DEVELOPING LOW PRESSURE SYSTEM/SFC WAVE. AS THE LOW PRESSURE SYSTEM LIFTS INTO THE SRN/MID ATLANTIC BASIN. WHAT MAY BEAR WATCHING WILL BE THE NEXT INFLUX OF COOLER AIR INTO THE REGION HEADING INTO THE NEW WEEK. AS A CLIPPER LIKE UPPER LOW/TROUGH AXIS DIVES SEWD ACROSS THE PLAINS STATES AND INTO THE MIDWEST/TN VALLEY REGIONS.
A BUILDING RIDGE OF HIGH PRESSURE WILL RESULT IN DRY WEATHER CONDITIONS AND ABOVE AVERAGE TEMPERATURES THROUGH THE UPCOMING WEEKEND. TEMPERATURES FINISHED OFF A TAD COOLER IN MOST LOCATIONS THIS AFTERNOON WITH READINGS IN THE MID 50S TO LOWER 60S ACROSS THE NORTHERN HALF OF THE DISTRICT AND MID 60S TO LOWER 70S ACROSS THE SOUTHERN HALF. TRANQUIL WEATHER WILL CONTINUE ACROSS THE DISTRICT THROUGH THE FORECAST PERIOD AS A RIDGE OF HIGH PRESSURE AMPLIFIES OFF THE COAST TONIGHT INTO TUESDAY.
FREEZING DRIZZLE HAS YET TO BE REPORTED OVER FAR NORTHERN MINNESOTA. AND THE POSSIBILITY OF PATCHY FREEZING DRIZZLE TONIGHT AND TUESDAY MORNING. THIS WOULD ALLOW THE PRECIP TO MIX WITH OR CHANGE OVER TO FREEZING DRIZZLE. SHOULD SEE THIS BAND SLOWLY DISSIPATE TONIGHT AS THE WARMER AIR ADVECTS IN FROM THE WEST. THE MAIN S/W ASSOCIATED WITH THE SNOW SHOWERS WILL MOVE QUICKLY TO THE SE TUESDAY MORNING WITH WEAK UPPER LEVEL RIDGING BEHIND THE SYSTEM. CONDITIONS SHOULD REMAIN FAIRLY QUIET THROUGH THE DAY TUESDAY AS THE WEAK RIDGE BUBBLE SITS OVER THE REGION ALONG WITH RELATIVELY DRY AIR. TEMPERATURES WILL BE SLIGHTLY WARMER THAN TODAY WITH HIGHS INTO THE MID 20S TO LOWER 30S. FREEZING DRIZZLE OR SOME SLEET WILL BE POSSIBLE AS WELL.
350 AM EST TUE JAN 20 2015 HIGH PRESSURE WILL MOVE OFF THE SOUTHEAST COAST TODAY.
COLD FRONT JUST TO THE NORTH OF CHEYENNE THIS AFTERNOON EXTENDS ALONG A LINE FROM GREELEY CO.
Given the depth of dry air below the lift and moisture, expect little more than sprinkles with only a very small potential for a rain shower if weak elevated instability can develop today under the approaching trough. Based on the assumption of afternoon sunshine, high temperatures should climb into the lower 50s despite a northwest breeze and some cold advection.
129 AM EST TUE JAN 20 2015 LOW PRESSURE WILL LIFT ACROSS LABRADOR TODAY.
AN UPPER LEVEL RIDGE BUILDING OFFSHORE WILL KEEP WESTERN WASHINGTON DRY TONIGHT.
TEMPERATURES WILL BE COOLER WITH LIGHTER WINDS. NW TO N FLOW CONTINUES OVR THE FA WITH A TREND TOWARD RIDGING. BEHIND FINAL UPR SW TROF THAT WILL MOVE THRU THE FA FROM N TO S LATER OVERNIGHT WED. AS IT WILL TAKE A BIT OF WORK TO GET ENOUGH MOISTURE BACK INTO THE CWA UNDER THE PREVIOUS RIDGE/DRY CONDITIONS.
THE SATELLITE-DERIVED SOUNDING WAS DECIDEDLY COOLER. THEN TEMPERATURES MAY NOT GET OUT OF THE LOWER TO MID 70S.
/ISSUED 339 PM CST MON JAN 19 2015/ ANOTHER UNSEASONABLY WARM JANUARY AFTERNOON WITH MAINLY UPPER 60S AND LOWER 70S HAS BEEN FUELED BY S/SW FLOW IN THE LOW LEVELS AND ZONAL FLOW ALOFT. CLOUDS HAVE BEEN LIMITED TO JUST SOME HIGH THIN CIRRUS IN ADVANCE OF AN UPPER TROF AND A TRAILING COLD FRONT THAT HAS BEEN TRACKING THROUGH KS TODAY AND WILL SOON ENTER NRN OK. NO RAINFALL IS EXPECTED WITH THIS FRONT AS MOISTURE RETURN WILL BE LIMITED TO THE LOW LEVELS.
HIGH PRESSURE IS SETTLING IN OVER THE REGION TONIGHT. WEST SIDE VALLEY FOG AND FREEZING FOG COULD BECOME DENSE TONIGHT. A THERMAL TROUGH IS DEVELOPING ALONG THE COAST AND WILL STRENGTHEN THIS EVENING THROUGH TUESDAY.
841 PM PST MON JAN 19 2015 High pressure will build into the region tonight and last through mid week. With low temperatures dropping into the mid to upper 20s freezing fog is likely which could lead to slick roads for the Tuesday morning commute. JW 00Z TAFS: As winds decrease and high pressure strengthens, we expect stratus and fog to develop especially in the KGEG- KCOE corridor and extending south toward KPUW.
2 SUBTLE WAVES ACTUALLY NOTED IN WATER VAPOR GIVING WAY TO A RATHER BROAD WEAK AREA OF LOW PRESSURE CURRENTLY DROPPING THROUGH THE DAKOTAS. ENOUGH LIFT AND DEPTH OF MARGINAL WARM LAYER COULD SPELL A PERIOD OF LIGHT FREEZING DRIZZLE. BUT STILL ALLOW ABOVE FREEZING TEMPS.
1238 AM EST TUE JAN 20 2015 A PRESSURE RIDGE ALONG THE GULF COAST WILL WEAKEN THROUGH TUESDAY.
WITH A COMBINATION OF LIGHT WESTERN WINDS AND CLOUD COVER KEEPING MOST AREAS ABOVE FREEZING AT 3AM. AND SHOULD SERVE TO CONFINE THE HIGHEST CHANCES FOR LIGHT PRECIP ALONG AND NORTHEAST OF A HURON TO BROOKINGS.
COLD FRONTAL PROGRESS APPEARS TO BE A BIT SLOWER IN THE LATEST DATA AND HAVE ADJUSTED FROPA AT EACH OF THE SITES ACCORDINGLY. A MODEST COLD FRONTAL BOUNDARY WILL SHOVE SOUTH BUT WITH SLACKED PACKING OF THE PRESSURE GRADIENT.
N WINDS WILL FOLLOW A WEAK COLD FRONT ACROSS OK AND N TX LATER TONIGHT AND TOMORROW.
WINDS CONTINUE TO STAY ON THE LOWER END WITH LOTS OF CLOUDS AROUND. GET A BREAK FROM THE LIGHT SNOW WED NIGHT INTO THU WITH A RIDGE AXIS BRIEFLY POKING UP INTO THE AREA.
311 AM CST TUE JAN 20 2015 MAIN CONCERN IN THE SHORT TERM INCLUDE LIGHT FREEZING DRIZZLE CHANCES THIS MORNING. TEMPERATURES WERE SITTING IN THE LOWER/MIDDLE 20S ACROSS NORTH CENTRAL WI. TO THE THE LOWER 30S SOUTH OF I-90. FREEZING DRIZZLE CHANCES WILL BE SEEN THIS MORNING. THIS IS BECAUSE MAIN FORCING FROM THE AFOREMENTIONED MID- LEVEL TROUGH/CIRCULATION WILL PUSH SOUTHEAST OF THE AREA. THIS MAY PRODUCE ISOLATED/PATCHY FREEZING DRIZZLE FOR A TIME THIS MORNING BEFORE SURFACE TEMPERATURES WARM TO NEAR/ABOVE FREEZING THIS AFTERNOON. WILL BE WATCHING ANOTHER MID-LEVEL TROUGH/CYCLONIC CIRCULATION DROP INTO THE REGION IN NORTHWEST FLOW ALOFT.
1155 PM EST MON JAN 19 2015 A WEAK AREA OF LOW PRESSURE OVER THE NORTHERN PLAINS WILL MOVE SOUTHEAST ACROSS THE AREA ON TUESDAY.
1128 PM CST MON JAN 19 2015 WEAK COLD FRONT STILL LIES NORTH OF KAMA.
LOW LEVEL THICKNESS AND MODEL SOUNDINGS INDICATE WARMER AIR ALOFT WHICH SHOULD KEEP PRECIPITATION MAINLY LIQUID. BUT WITH SURFACE TEMPERATURES NEAR FREEZING WILL ADD MENTION OF FREEZING DRIZZLE AND SLEET TO NORTHERN SECTIONS TONIGHT.
/ISSUED 855 PM CST MON JAN 19 2015/ THE COLD FRONT IS CURRENTLY SITUATED FROM ABOUT MIAMI TO BRISTOW AS IT CONTINUES SOUTHEASTWARD ACROSS THE FORECAST AREA. VFR CONDITIONS EXPECTED THROUGH THE FORECAST PERIOD ALTHOUGH MID CLOUDS WILL INCREASE LATER TONIGHT BEHIND A WEAK COLD FRONT. A COLD FRONT CURRENTLY LOCATED NEAR A KTOP TO KHUT LINE WILL MOVE THROUGH THE AREA TONIGHT INTO TUESDAY.
1244 AM EST TUE JAN 20 2015 HIGH PRESSURE IN CONTROL TONIGHT.