Aikyam-Lab/Synoptic-Bench huggingface dataset:
NOTE THAT LIGHT FREEZING DRIZZLE HAS BEEN REPORTED UNDER THAT CLOUD DECK IN MN. THE LOW CLOUDS /STRATUS/ OVER SOUTHEAST ND AND NORTHEAST SD ARE MAKING SLOW PROGRESS TO THE WEST-NORTHWEST ALREADY AS OF 2340 UTC. AND WE EXPECT THE PACE OF ADVECTION AND EXPANSION TO RAMP UP CONSIDERABLY NOW THAT THE SUN HAS SET AND THE LOWER-ATMOSPHERE IS BEGINNING TO COOL. UPPER LEVEL ANALYSIS PLACES WEAK RIDGING OVER THE AREA WITH LOW SPINNING OFF THE PACIFIC NORTHWEST AND TROUGH DROPPING TO THE SOUTH. PASSIVE UPPER RIDGE QUICKLY PUSHES OFF TO THE EAST WITH UPPER FLOW STARTING TO SHIFT SOUTHWESTERLY AS INITIAL SHORT WAVE EJECTING OFF PACIFIC SYSTEM STARTS ITS APPROACH. FORECAST SOUNDINGS SUGGEST THE POSSIBILITY OF SOME FREEZING RAIN.
A STRONG HIGH PRESSURE SYSTEM CENTERED OVER THE MID ATLANTIC STATES. WITH THE HIGHEST WINDS OVER THE FLORIDA STRAITS AND HAWK CHANNEL.
WEAK RIDGING OVER THE REGION WILL BREAK DOWN QUICKLY IN THE NEXT 24 HOURS AS ENERGY BEGINS EJECTING EAST FROM THE SOUTHWEST CONUS.
/issued 346 PM CST TUE JAN 5 2016/ (Tonight and Wednesday) Currently, an upper level trough moving northeast across eastern NM and west TX is resulting in showers northwest of our area. The next trough in the train of waves that will affect our area is moving into the southern CA coast. Lows tonight will be warmer across the area in the 40s for most locations with clouds and moisture increase. Highs tomorrow could be a few degrees warmer even with cloud-cover and rain chances due WAA from continued southerly flow.
OVERALL A BIT WARMER THAN THE PREVIOUS NIGHT WITH LOWS U50S/L60S ALONG THE SPACE/TREASURE COASTS.
Will keep the low-end PoPs in the forecast the remainder of the night.
MODELS PROG THE LOWEST CONDITIONS TO OCCUR BETWEEN 09Z-18Z.
THE CWA SITS UNDER THE INFLUENCE OF A TIGHTENED PRESSURE GRADIENT AHEAD OF AN AREA OF LOW PRESSURE OVER ERN CO. THOUGH SOME WILL END UP WARMER THAN EXPECTED. SOME FORECAST SOUNDINGS SUPPORT TEMPS ALOFT RIGHT AROUND/JUST ABOVE FREEZING. THEY HOVER ON EITHER SIDE OF FREEZING. OBVIOUSLY MAKING THE DIFFERENCE BETWEEN FREEZING AND NOT.
929 PM EST TUE JAN 5 2016 HIGH PRESSURE THROUGH WEDNESDAY.
907 PM CST TUE JAN 5 2016 HIGH PRESSURE WILL CONTINUE OVERNIGHT.
CHATTANOOGA AIRPORT, TN 24 46 30 53 / 0 0 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 20 45 28 52 / 0 0 0 10 OAK RIDGE, TN 20 45 28 52 / 0 0 0 10 TRI CITIES AIRPORT, TN 14 45 21 53 / 0 0 0 10.
/ISSUED 326 PM CST TUE JAN 5 2016/ Active pattern will persist through the weekend with longwave trough remaining over western and central U.
635 PM EST TUE JAN 5 2016 HIGH PRESSURE CONTINUES TO HOLD OVER SOUTHEAST MICHIGAN KEEPING SKIES CLEAR.
CRYSTAL CLEAR SKIES ARE UPON MUCH OF THE SOUTHEAST THIS AFTERNOON AS HIGH PRESSURE TO OUR NORTH MAINTAINS CONTROL.
HAVE ADJUSTED OVERNIGHT LOWS A DEGREE OR TWO COOLER.
625 PM EST TUE JAN 5 2016 HIGH PRESSURE WILL REMAIN IN PLACE IN THE MID-ATLANTIC REGION FOR THE NEXT FEW DAYS.
THE LOW CLOUDS /STRATUS/ OVER SOUTHEAST ND AND NORTHEAST SD ARE MAKING SLOW PROGRESS TO THE WEST-NORTHWEST ALREADY AS OF 2340 UTC. AND WE EXPECT THE PACE OF ADVECTION AND EXPANSION TO RAMP UP CONSIDERABLY NOW THAT THE SUN HAS SET AND THE LOWER-ATMOSPHERE IS BEGINNING TO COOL. UPPER LEVEL ANALYSIS PLACES WEAK RIDGING OVER THE AREA WITH LOW SPINNING OFF THE PACIFIC NORTHWEST AND TROUGH DROPPING TO THE SOUTH. PASSIVE UPPER RIDGE QUICKLY PUSHES OFF TO THE EAST WITH UPPER FLOW STARTING TO SHIFT SOUTHWESTERLY AS INITIAL SHORT WAVE EJECTING OFF PACIFIC SYSTEM STARTS ITS APPROACH. FORECAST SOUNDINGS SUGGEST THE POSSIBILITY OF SOME FREEZING RAIN.
914 PM EST TUE JAN 5 2016 HIGH PRESSURE WILL REMAIN IN PLACE IN THE MID-ATLANTIC REGION FOR THE NEXT FEW DAYS.
950 PM EST TUE JAN 5 2016 HIGH PRESSURE WILL PREVAIL INLAND THROUGH TONIGHT AS A COASTAL TROUGH DEVELOPS OFFSHORE. THE TROUGH WILL LINGER AS IT TRANSFORMS INTO A STATIONARY FRONT THROUGH LATE WEEK.
720 PM EST TUE JAN 5 2016 THE COLDEST AIR OF THE SEASON WILL SLOWLY MODERATE OVER THE NEXT FEW DAYS AS HIGH PRESSURE OVERHEAD SLIDES TO THE EAST.
623 PM EST TUE JAN 5 2016 THE COLDEST AIR OF THE SEASON WILL SLOWLY MODERATE OVER THE NEXT FEW DAYS AS HIGH PRESSURE OVERHEAD SLIDES TO THE EAST.
/ISSUED 212 PM EST TUE JAN 5 2016/ HIGH PRESSURE WILL CONTINUE ACROSS THE SE US THROUGH THE SHORT TERM PERIOD.
CHATTANOOGA AIRPORT, TN 24 46 30 53 / 0 0 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 20 45 28 52 / 0 0 0 10 OAK RIDGE, TN 22 45 28 52 / 0 0 0 10 TRI CITIES AIRPORT, TN 15 45 21 53 / 0 0 0 10.
BUT THE LOW TEMPERATURE FORECAST IS NOT MUCH DIFFERENT GIVEN LOW CONFIDENCE IN ANY CHANGES. /ISSUED 328 PM CST TUE JAN 5 2016/ HIGH PRESSURE CONTINUES TO DOMINATE THE EASTERN HALF OF THE CONUS TODAY AND WILL DO SO TOMORROW AS WELL. LOW TEMPS WILL BE AROUND FREEZING TONIGHT FOR ONE MORE TIME THIS WEEK. WEDNESDAY WILL BE A QUIET DAY AS WELL WITH TEMPS A LITTLE WARMER AND CLOUD COVER INCREASING.
EXCEPT FOR THE LOW STRATUS BAND HANGING OVER NORTHEAST AND EAST CENTRAL UTAH THIS AFTERNOON CREATING SOME SCATTERED SNOW SHOWERS ALONG THE VERNAL TO MONTICELLO CORRIDOR. SO AN ELEVATED LAYER OF ABOVE FREEZING TEMPS IS POSSIBLE. LEFT FREEZING RAIN OUT OF THE FORECAST AS WE ARE FAIRLY CONFIDENT THAT THE ABOVE FREEZING LAYER WILL NOT BE WARM ENOUGH OR THICK ENOUGH FOR THE SCENARIO. THE 12Z NAM/GFS SOLUTIONS SHOWED COLD ADVECTION UPSLOPE FLOW INTO THE DURANGO AREA AS THE TROUGH AXIS APPROACHED FROM THE SOUTHWEST. WITH THE NEGATIVE TILTED TROUGH GETTING STRETCHED AND WEAKENING DYNAMICAL SUPPORT ALOFT. THE WEAKENING TROUGH CROSSES THE ENTIRE FORECAST AREA WED EVE.
BUT CLOUD COVER HAS KEPT TEMPERATURES IN THE LOW 40S ACROSS SOUTHEAST GEORGIA. TEMPERATURES ARE FORECAST TO FALL TO NEAR FREEZING TO RIGHT AT FREEZING NEAR DAYBREAK FOR THE COUNTIES BORDERING THE FREEZE WARNING IN SOUTHEAST GEORGIA.
451 PM CST TUE JAN 5 2016 FOR 00Z TAFS /ISSUED 142 PM CST TUE JAN 5 2016/ RIDGING ACROSS THE REGION WAS PROVIDING FOR MOSTLY SUNNY SKIES AND COOL TEMPS ACROSS THE TN VALLEY. TEMPS WERE MAINLY IN THE LOWER 40S WITH VERY LOW DEWPOINTS. FOR TONIGHT EXPECT COLD TEMPS AGAIN WITH MRNG LOWS IN THE LOW/MID 20S UNDER CLR SKIES. THE RIDGE CONTINUES TO MOVE EAST OF THE TN VALLEY ALLOWING FOR RETURN FLOW TO SET UP ALONG WITH INCREASING CLOUDS. TEMPS WILL BE A LITTLE WARMER AS WELL WITH HIGHS IN THE MID/UPPER 40S AND LOWS OVERNIGHT IN THE LOWER 30S.
848 PM EST TUE JAN 5 2016 A SHORT WAVE TROUGH NOW JUST NORTH OF THE YUCATAN VIA WATER VAPOR IMAGERY WILL MOVE EAST AND APPROACH THE SOUTHERN FLORIDA PENINSULA LATER TONIGHT. THE EXCEPTION TO THIS HOWEVER WILL BE ACROSS CHARLOTTE AND LEE COUNTIES AS WELL AS OVER SOUTHEAST PORTIONS OF HIGHLANDS AND DESOTO COUNTIES WHERE CHANCES FOR SOME SHOWERS WILL BE ON THE INCREASE AFTER MIDNIGHT INTO THE EARLY MORNING HOURS ON WEDNESDAY AS MID LEVEL DESTABILIZATION AND INCREASING ASCENT OCCURS WITH THE APPROACH OF THE SHORT WAVE TROUGH. ACROSS THE REMAINDER OF THE REGION MOSTLY CLOUDY AND MAINLY DRY CONDITIONS ARE EXPECTED TO CONTINUE AS A DRY SUBSIDENT AIRMASS ASSOCIATED WITH THE HIGH TO THE NORTH REMAINS IN CONTROL.
633 PM EST TUE JAN 5 2016 HIGH PRESSURE THROUGH WEDNESDAY.
254 PM PST TUE JAN 5 2016 AN UPPER LEVEL TROUGH OFFSHORE WILL PROGRESS INLAND DURING WEDNESDAY. DUE TO THE STRONG SOUTH FLOW AHEAD OF THE TROUGH, DOWNSLOPING WINDS SHOULD PREVENT PRECIPITATION OCCURING IN THE ROGUE AND UMPQUA VALLEYS, SO KEPT PROBABILITY OF PRECIPITATION PRETTY LOW FOR MOST OF SOUTHERN OREGON EXCEPT FOR THE COAST AND SISKIYOU COUNTY. THIS IS WHEN SNOW RATES WILL BE THE HIGHEST AROUND 0. SO COMPACTION DUE TO WINDS ALONG WITH UNCERTAINTY IN THE SNOW RATIOS MAY THROW THE FORECAST OFF AND PUT SNOW TOTALS ON THE LOWER SIDE. FOR THE FORECAST DURING WEDNESDAY,USED A SNOW RATIO OF 10:1, BUT LOWER SNOW RATIOS DUE TO WARMER SURFACE TEMPS AND WIND COMPACTION IS STILL POSSIBLE. IT LOOKS LIKE A BRIEF PERIOD OF STRONG WINDS AND GUSTS IN THE SHASTA VALLEY AGAIN AS THE UPPER LEVEL TROUGH PROGRESSES INLAND.
SHORT WAVE TROUGH FROM THE SOUTHWEST WILL BRING LIGHT RAIN. AND FREEZING RAIN TO THE AREA TONIGHT AND WEDNESDAY MORNING. THE ATMOSPHERE HAS AN ABOVE-FREEZING LAYER ABOVE THE SURFACE. MANY VALLEYS IN SOUTHEASTERN OREGON AND SOUTHWESTERN IDAHO WILL BE BELOW FREEZING AT THE SURFACE. THE TROUGH CAUSING THIS PCPN WILL EXIT TO OUR NORTHEAST WEDNESDAY.
AN UPPER LOW OFFSHORE WILL BRING A LITTLE RAIN TONIGHT INTO WEDNESDAY MORNING. DRIER WEATHER IS IN STORE WEDNESDAY THROUGH THE WEEKEND AS AN UPPER RIDGE MOVES IN. LIGHT RAIN CONTINUES ACROSS WESTERN WA THIS AFTERNOON FROM AN UPPER LOW SPINNING OFFSHORE. RAIN WILL TAPER OFF THIS EVENING AS THE TROUGH AXIS LIFTS FARTHER NORTH AND EXITS. LIGHT RAIN WILL MAINLY AFFECT THE COAST LATE TONIGHT INTO WEDNESDAY MORNING AS ANOTHER TROUGH AXIS SWINGS NORTH OFFSHORE. IT WILL BE A LITTLE WARMER TOO WITH TEMPS RISING INTO THE MID TO UPPER 40S.
411 AM EDT MON APR 4 2016 DRY AND UNSEASONABLY COLD AIR WILL SWEEP SOUTHWARD TODAY AS HIGH PRESSURE BUILDS ACROSS THE SOUTHERN GREAT LAKES. TEMPERATURES WILL FALL INTO AND THROUGH THE 30S TODAY AND INTO THE LOW TO MID 20S TONIGHT AS SKIES CLEAR.
A COLD FRONT EXTENDED FROM A LOW OVER EAST CENTRAL MT SOUTHEAST THROUGH THE SD BLACK HILLS INTO EAST CENTRAL NE. GOOD MODEL AGREEMENT THROUGHOUT THE SHORT TERM WITH THE UPPER RIDGE OVER THE INTERMOUNTAIN WEST PROGRESSING EAST ACROSS THE CWA TODAY AND INTO THE GREAT PLAINS TONIGHT. NEXT POTENT UPPER LOW AND COLD FRONT TO AFFECT THE CWA WILL TRACK EAST ACROSS MT. THE STRONGEST PRESSURE FALLS ASSOCIATED WITH THE PREFRONTAL TROUGH WILL DEVELOP ACROSS NORTHEAST WY/WESTERN SD TUESDAY MORNING WITH STRONG WESTERLY WINDS. DID NOT ISSUE ANY WIND HIGHLIGHT AS THERE ARE SOME TIMING DIFFERENCES WRT THE COLD FRONTAL PASSAGE. TEMPERATURES WIL BE 10 TO 15 DEGREES COOLER TUESDAY WITH STRONG AND GUSTY WEST TO NORTHWEST WINDS OF 35 TO 45 MPH.
648 AM EDT MON APR 4 2016 TEMPERATURES WILL FALL THROUGH THE DAY AS A COLD FRONT BRINGS SHOWERS TO THE REGION.
WITH GENERALIZED RIDGING WEST AND TROUGHING EAST. BRINGING COOLER AIR BACK TO THE AREA TONIGHT AND FOR TUESDAY. TODAY SHOULD FEATURE GENERALLY SUNNY SKIES AND WARMER THAN SEASONAL NORMS. WITH HIGHS CLIMBING INTO THE LOW/MID 70S. AVERAGE HIGH TEMPERATURES THIS TIME OF YEAR ARE IN THE LOWER 70S. AS TEMPERATURES TREND COLDER AS A SERIES OF FRONTS AND SYSTEMS BRING COOLER CONDITIONS TO THE FORECAST AREA FOR TUESDAY INTO THE WEEKEND. ALONG WITH COOLER AIR FILTERING IN FROM THE NORTH. HIGHS ON TUESDAY WILL TREND COOLER IN THE MID 60S.
DRY AND WARM CONDITIONS WILL PREVAIL ACROSS DEEP SOUTH TEXAS TODAY THROUGH TUESDAY WITH A 500MB RIDGE OVERHEAD. THE LOW LEVEL MOISTURE IN COMBINATION WITH DRY AIR ALOFT AND LIGHT SURFACE WINDS ESPECIALLY ACROSS THE NORTHERN RANCHLANDS. TUESDAY WILL BE SLIGHTLY WARMER WITH HIGH TEMPERATURES AROUND 80 NEAR THE COAST.
A COLD FRONT LOCATED NEAR THE WEST COAST WILL MOVE RAPIDLY THROUGH SE OREGON THIS MORNING AND SW IDAHO THIS AFTERNOON. BUT WILL LINGER IN THE WEST CENTRAL MOUNTAINS ASSOCIATED WITH AN UPPER TROUGH. THE TROUGH WILL BE TO OUR EAST BY TUESDAY MORNING. TEMPERATURES WILL BE MUCH COOLER TODAY. AND WILL WARM SLIGHTLY IN SE OREGON ON TUESDAY AS AN UPPER RIDGE STARTS TO BUILD INTO THE PACNW.
TODAY THROUGH TUESDAY NIGHT NORTHWEST FLOW CONTINUES OVER THE NORTHERN PLAINS AS UPPER RIDGE MOVES OVER THE ROCKIES. BACKDOOR COLD FRONT IS DRAPED ACROSS THE CWA. HIGHS WILL RANGE FROM THE LOWER 60S ACROSS CENTRAL SD TO THE LOWER 70S ACROSS SOUTHWEST SD AND PARTS OF NORTHEASTERN WY. BEFORE WINDS BECOME WEST-NORTHWESTERLY WITH PASSING COLD FRONT ASSOCIATED WITH INITIAL TROUGH. PRESSURE GRADIENT WILL TIGHTEN BEHIND INITIAL TROUGH TUESDAY MORNING. HOWEVER AS THE SECONDARY TROUGH/LOW PRESSURE APPROACHES DURING THE DAY.
604 AM EDT MON APR 4 2016 A SMALL AREA OF LOW PRESSURE WILL TRACK SOUTH OF THE REGION TODAY.
Skies were mostly clear, temperatures were in the mid 40s across low areas of southern counties and in the low to mid 50s across the Big Country including Abilene, Haskell and Throckmorton. A weak ridge of high pressure aloft is drifting across the forecast area. Overnight low temperatures Monday night and Tuesday morning will be in the low to mid 50s, at least 10 degrees warmer than the past few nights. Warmer morning low temperatures will be caused by an increase in overnight winds that will vertically mix cooling air near the surface with warmer air aloft and not allow cool pockets of surface air to form especially in low lying areas.
THIS HIGH WILL REMAIN IN PLACE THROUGH A GOOD PORTION OF THE DAY KEEPING WINDS ON THE LIGHT SIDE AND TEMPERATURES COOL.
416 AM CDT MON APR 4 2016 ANOTHER WARM DAY IS ON TAP TODAY WITH HIGHS IN THE LOW 80S AS AN UPPER LEVEL RIDGE PUSHES CLOSE TO THE REGION AND A THERMAL RIDGE MOVES IN AT THE SURFACE. A WEAK COLD FRONT IS CURRENTLY DRAPED ACROSS THE NORTHERN TEXAS PANHANDLE INTO SOUTH CENTRAL KANSAS AND WILL PUSH SOUTHWARD INTO THE FA BEFORE NOON BUT WILL BE VIRTUALLY USELESS WHEN IT COMES TO AFFECTING TEMPS TODAY. WINDS WILL QUICKLY VEER FROM THE NORTH AFTER THE FROPA TO THE SOUTHEAST AS A LEE TROF SETS UP TO OUR NORTHWEST. AS THE SURFACE PRESSURE GRADIENT WILL BE RELAXED AND WE WILL BE UNDER THE INFLUENCE OF A UPPER LEVEL RIDGE. TROUGH COMING ASHORE THE PACIFIC NORTHWEST. A PRONOUNCED TROUGH WILL EXIST SOUTH OF THE CORE.
WENT TOWARDS THE WARMER SIDE OF MODEL GUIDANCE HIGHS. WENT WITH THE WARMER SIDE OF GUIDANCE HIGHS. BUT GENERALLY PREFERRED THE LOWER SIDE OF DEWPOINTS DUE TO THE LACK OF SIGNFICANT RECENT RAINFALL. A COLD FRONT WILL MOVE THROUGH THE AREA AND MAY BRING ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS TO MAINLY NORTHERN OKLAHOMA.
349 AM CDT MON APR 4 2016 A cold front was moving south across central Missouri and central Illinois early this morning. The front will move south across the Lower Ohio Valley and southeast Missouri this morning, finally exiting the khop area early this afternoon. Radar does indicate some very weak echoes aloft developing over the Lower Wabash Valley as of 08z, so a few sprinkles cannot be ruled out. Highs are forecast to range from the upper 50s north of Interstate 64 to the lower 70s along the Tennessee and Arkansas borders.
These light showers are associated with a cold front that is moving through the area which will cause all winds to go from southwest to northerly. HRRR has the lower clouds getting into northern parts of the CWA, but then not really into the rest of the CWA. Temperature drop further aided by light winds under the narrow ridge axis in concert with eroding cloud cover.
NEAR TERM AND SHORT TERM SECTIONS HAVE BEEN UPDATED BELOW HIGH PRESSURE IS FORECAST TO ARRIVE OVER INDIANA FROM THE NORTHWEST TODAY.
A FEW SHOWERS STILL POSSIBLE MAINLY OVER THE HIGHER MTNS AND THE NORTHERN PARTS OF THE CWA LATE THIS AFTERNOON INTO THIS EVENING AS A WEAK IMPULSE MOVES SOUTHEAST ACROSS THE REGION. QUITE MILD FOR MONDAY AS THE UPPER RIDGE AXIS PASSES ACROSS THE AREA WITH HIGHS OVER THE PLAINS IN THE 60S TO LOWER 70S. COLD FRONT WILL SWEEP EAST ACROSS THE CWA MONDAY EVENING WITH WIDELY SCTD RAIN AND SNOW SHOWERS BEHIND IT. TUESDAY LOOKING COOLER AND RATHER WINDY WITH MAX TEMPS ABOUT 15 DEGREES LESS THAN MONDAY.
A COLD FRONT, WHICH MOVED ACROSS YESTERDAY, IS SITTING WELL TO THE SOUTH OF THE KEYS.
HIGH PRESSURE IS FORECAST TO ARRIVE OVER INDIANA FROM THE NORTHWEST TODAY.
MID/UPPER LEVEL RIDGE AXIS WILL MOVE E THROUGH THE SHORT TERM AND CONTINUE TO INFLUENCE S TX WEATHER WITH SUNNY SKIES AND A GRADUAL WARMING TREND.
A weak cold front will drop south through the forecast area this morning, turning winds to the north. Highs today will be somewhat cooler than yesterday, though still mild by early April standards. Readings should range from the mid to upper 60s north of I-44, to the low 70s across far southern Missouri. Dewpoints should mix down into the low 30s behind the front, yielding afternoon RH in the 25-30 percent range. Winds will be lighter today compared to yesterday, but the low RH will still result in elevated fire weather conditions across the region.
LONG WAVE RIDGE REMAINS OVER WESTERN CANADA AND THE PACIFIC NORTHWEST WHILE A LONG WAVE TROUGH REMAINS OVER EASTERN NORTH AMERICA THROUGH THE PERIOD.
BUT STRONG HIGH PRESSURE WILL BE MOVING IN AND SO THE WESTERN SIDE OF THE FORECAST AREA WILL SEE LITTLE PRECIPITATION ACTIVITY.
Upper level jet streak will shift out of the Four Corners region during the day Tuesday with a cold front moving into northeast Oklahoma/northwest Arkansas Tuesday night.
A COLD FRONT EXTENDED FROM A LOW OVER EAST CENTRAL MT SOUTHEAST THROUGH THE SD BLACK HILLS INTO EAST CENTRAL NE. GOOD MODEL AGREEMENT THROUGHOUT THE SHORT TERM WITH THE UPPER RIDGE OVER THE INTERMOUNTAIN WEST PROGRESSING EAST ACROSS THE CWA TODAY AND INTO THE GREAT PLAINS TONIGHT. NEXT POTENT UPPER LOW AND COLD FRONT TO AFFECT THE CWA WILL TRACK EAST ACROSS MT. THE STRONGEST PRESSURE FALLS ASSOCIATED WITH THE PREFRONTAL TROUGH WILL DEVELOP ACROSS NORTHEAST WY/WESTERN SD TUESDAY MORNING WITH STRONG WESTERLY WINDS. DID NOT ISSUE ANY HIGH WIND HIGHLIGHTS AS THERE ARE SOME TIMING DIFFERENCES WRT THE COLD FRONTAL PASSAGE. TEMPERATURES WIL BE 10 TO 15 DEGREES COOLER TUESDAY WITH STRONG AND GUSTY WEST TO NORTHWEST WINDS OF 35 TO 45 MPH.
WESTERLY FLOW BEHIND THE LOW WILL ALLOW FOR DRY CONDITIONS AND GUSTY WINDS TUESDAY.
A SHOT OF COOLER AIR WL BRIEFLY RETURN TO THE REGION TNGT AND TUE. HIGHS TUE WL BE ABT 5 TO 10 DEGREES COOLER.
355 AM EDT MON APR 4 2016 TEMPERATURES WILL FALL THROUGH THE DAY AS A COLD FRONT BRINGS SHOWERS TO THE REGION.
1049 PM PDT SUN APR 3 2016 A vigorous cold front will move through the Inland Northwest during the early morning hours on Monday bringing showers and increasing west winds. Drier and much warmer weather is expected by mid to late week. A vigorous cold front is currently making its march across western OR and WA this evening. The new 00Z NAM solution came in with a slightly slower timing with the cold front as it crosses the Cascades. /SVH 06Z TAFS: A vigorous cold front passage is expected overnight. This instability looks weak, but model sounding profiles would suggest a small possibility for thunderstorms in the vicinity of KLWS and KPUW before the cold front arrives.
521 AM EDT MON APR 4 2016 A SMALL AREA OF LOW PRESSURE WILL TRACK SOUTH OF THE REGION TODAY.
TEMPS WERE IN THE LOW TO MID 50S AT MOST LOCATIONS. EXPECT WIND SHIFT WITH COLD FRONT TO MOVE THROUGH MSL AROUND 20Z AND HSV BY 21Z WITH WEST THEN NORTHWEST WINDS EXPECTED THROUGH THE REST OF THE FORECAST PERIOD.
A backdoor cold front will work its wake across the region, but this will have the main impacts via a wind shift. Warmer lows are expected tomorrow morning as higher dewpoints advect in. Any precip should be mainly north of the southward surging cold front. The highest pops will be across the north and eastern zones where the frontogenesis is the strongest.
A DRY BACK DOOR COLD FRONT WILL PUSH THROUGH THE AREA DURING THE DAY TUESDAY. LOW LEVEL WINDS WILL QUICKLY VEER FROM NORTHWEST TO NORTHEAST AND INCREASE TO 15 TO 20 MPH TOWARDS THE COAST AS STRONG HIGH PRESSURE BUILDS NORTH OF THE AREA. THE ONSHORE FLOW AND CLOUD MIX WILL HELP KEEP COASTAL AREAS IN THE LOWER 70S.
458 AM EDT MON APR 4 2016 SHOWERS WILL FALL ACROSS THE REGION TODAY AHEAD OF A FRONTAL SYSTEM THAT WILL BRING IN MUCH COOLER AIR TONIGHT AND TUESDAY.
THIS DRY FRONT WILL ALSO USHER IN ANOTHER REINFORCING HIGH PRESSURE RIDGE TUESDAY THAT WILL KEEP THE AREA PRECIPITATION FREE THROUGH THE SHORT TERM. TEMPS ACROSS THE AREA WILL BE SLIGHTLY ABOVE SEASONAL NORMS TODAY THEN SLIGHTLY BELOW AS DRY COLD FRONT SWEEPS THROUGH TONIGHT. 01 HIGH PRESSURE WILL BE PUSHING OFF THE ATLANTIC COAST AT THE START OF THE PERIOD.
THE UPPER RIDGE AXIS CURRENTLY OVER THE GREAT BASIN WILL SHIFT TO THE EAST ACROSS COLORADO OVER THE NEXT 24 HRS. THE BREAK DOWN OF THE RIDGE. A PAC COLD FRONT WILL LIKELY CROSS THE REGION DURING THE MIDDAY HOUR. RIDGE BUILDS ALOFT AND THE AREA WILL EXPERIENCE WARM TEMPS AND LITTLE WIND.
326 AM CDT MON APR 4 2016 HIGH PRESSURE CENTERED ALONG THE GULF COAST THIS MORNING. LOW PRESSURE OVER LAKE ERIE HAS A COLD FRONT STRETCHING SOUTHWESTWARD INTO NEW MEXICO.
A WEAK COLD FRONT SHOULD ADVANCE SOUTH INTO THE FORECAST AREA IN RESPONSE TO THIS UPPER FEATURE BY THIS AFTERNOON. COOLER TEMPERATURES ARE ANTICIPATED TONIGHT AND TUESDAY ACROSS THE MID SOUTH.
314 AM CDT MON APR 4 2016 Cold front is currently moving through northeast Missouri and west central Illinois. This is because the low levels are very dry per the latest RAP soundings. Upper trough supplying the ascent for the precipitation will move quickly east early this morning causing these returns to dissipate by 12Z which is depicted well by the experimental HRRR. Temperatures will be much cooler today with northerly winds advecting cooler air into the area.
A WEAKNESS IN THE VICINITY OF FLORIDA ALLOWS COASTAL TROUGHING TO FORM WITH THE WIND BACKING TO THE NORTH DURING THE MORNING THEN VEERING BACK TO THE NORTHEAST AS A SEA BREEZE FORMS IN THE AFTERNOON. HIGH PRESSURE OVER THE GREAT LAKES EARLY TUE WILL PUSH A BACKDOOR COOL FRONT SOUTHWARD INTO CENTRAL FL DURING THE DAY AND INTO SOUTH FL TUE NIGHT. COOLER INTERIOR IN THE UPPER 50S. A STRONGER COLD FRONT IS FORECAST TO PUSH THROUGH THE AREA FRI NIGHT AND BRING BELOW NORMAL TEMPERATURES THIS WEEKEND.
/ISSUED 416 AM CDT MON APR 4 2016/ ANOTHER WARM DAY IS ON TAP TODAY WITH HIGHS IN THE LOW 80S AS AN UPPER LEVEL RIDGE PUSHES CLOSE TO THE REGION AND A THERMAL RIDGE MOVES IN AT THE SURFACE. A WEAK COLD FRONT IS CURRENTLY DRAPED ACROSS THE NORTHERN TEXAS PANHANDLE INTO SOUTH CENTRAL KANSAS AND WILL PUSH SOUTHWARD INTO THE FA BEFORE NOON BUT WILL BE VIRTUALLY USELESS WHEN IT COMES TO AFFECTING TEMPS TODAY. WINDS WILL QUICKLY VEER FROM THE NORTH AFTER THE FROPA TO THE SOUTHEAST AS A LEE TROF SETS UP TO OUR NORTHWEST. AS THE SURFACE PRESSURE GRADIENT WILL BE RELAXED AND WE WILL BE UNDER THE INFLUENCE OF A UPPER LEVEL RIDGE. TROUGH COMING ASHORE THE PACIFIC NORTHWEST. A PRONOUNCED TROUGH WILL EXIST SOUTH OF THE CORE.
Significant Cold Front for Today. A fairly significant cold front is still on par to swing through the Northern Rockies today. Tuesday will be cooler with lingering snow showers across the region.
LEE-SIDE TROUGH WILL SET UP DURING THE DAY TODAY. THE SETUP OF THE LEE-SIDE TROUGH DURING THE DAY WILL ALLOW FOR INCREASED SOUTHERLY FLOW TO ENHANCE THE WAA INTO THE AREA BROUGHT ABOUT BY THE DOWNSLOPE CONDITIONS OF THE WNW WINDS ON THE EAST SIDE OF THE UPPER RIDGE.
High pressure has moved into the region and a cool dry air mass is in place. With the trough axis east of the area, we will find ourselves in northwesterly flow aloft. At the surface, high pressure over Louisiana will drift south into the GOMEX. A back door cold front will push across the forecast area Tuesday into Tuesday night.
206 AM EDT MON APR 4 2016 HIGH PRESSURE WILL BUILD INTO THE REGION THROUGH TONIGHT. A COLD FRONT WITH LIMITED MOISTURE WILL MOVE THROUGH MONDAY NIGHT.
CLEAR SKIES AND LIGHT SOUTHEAST WINDS WILL CONTINUE FOR THE NEXT 24 HOURS WITH HIGH PRESSURE IN CONTROL. HIGH PRESSURE WILL DOMINATE THE NEXT 24 HOURS WITH CLEAR SKIES AND LIGHT SOUTHEAST WINDS. H5 RIDGE CONTINUES TO DRIFT EASTWARD FROM THE ROCKIES INTO THE PLAINS STATES.
653 AM EDT MON APR 4 2016 THE AVIATION SECTION HAS BEEN UPDATED BELOW HIGH PRESSURE IS FORECAST TO ARRIVE OVER INDIANA FROM THE NORTHWEST TODAY.
AN UPPER LEVEL RIDGE SHIFTS FROM WESTERN MEXICO TO EASTERN MEXICO AND BUILDS INTO SOUTHERN TEXAS TUESDAY. AN UPPER LEVEL TROUGH OFF THE PACIFIC NORTHWEST COAST MOVES TO THE GREAT BASIN TUESDAY. SURFACE PRESSURE FALLS IN THE HIGH PLAINS MAINTAIN SOUTHERLY LOWER LEVEL FLOW ALLOWING A WARMING TREND WITH ABOVE NORMAL TEMPERATURES.
THIS IS OCCURRING ALONG A WEAK COLD FRONT WHICH WILL CONTINUE TO DROP SWD INTO OUR REGION LATER THIS AFTERNOON. VERY SIMILAR CONDITIONS WILL REPEAT TUESDAY WITH THE RETREATING FRONT AND WINDS BECOMING MORE S/SELY AHEAD OF A STRONGER COLD FRONT DIVING SOUTH OUT OF THE ROCKIES ACROSS THE PLAINS LATE TUESDAY.