Aikyam-Lab/Synoptic-Bench huggingface dataset:
Upper trough swinging southeast through the Great Lakes bringing a cold front through the area with pressure change observations suggesting it was south of the local area at 08Z with only minor wind differences around it.
AS HIGH PRESSURE TO THE WEST EXERTED ITS INFLUENCE TO THE EAST. WITH BLOCKING IN PLACE OVER THE INTERMOUNTAIN WEST. A WEAK UPPER LOW SE OF THE WESTERN BLOCK WILL MOVE ACROSS THE SOUTHERN STATES TODAY/TONIGHT. AS A TROUGH/WEAK COLD FRONT MOVES IN A NW-SE FASHION OVER THE REGION THIS AFTERNOON. HIGHS TODAY SHOULD BE NEAR NORMAL INTO THE LOWER 50S TODAY. BUT WILL STRUGGLE INTO THE LOWER 40S ON MON.
1146 PM EST SAT JAN 2 2016 A COLD FRONT, WITH THE COLDEST AIRMASS OF THE WINTER SEASON, WILL CROSS THE AREA SUNDAY AFTERNOON AND EVENING.
WHAT WE CAN SAY IS EACH TROUGH OF LOW PRESSURE WILL BE PROGRESSIVE AND NOT ALLOW A LOT OF TIME FOR LARGE AMOUNTS OF PRECIPITATION.
311 AM EST SUN JAN 3 2016 LOW PRESSURE WILL MOVE SLOWLY EAST ACROSS SOUTHERN QUEBEC. DRIVING AN ARCTIC COLD FRONT THROUGH THE REGION LATE IN THE DAY.
AND AS SUCH PRECIP TYPE REMAINS UNCERTAIN WITH SOME POTENTIAL FOR PERIODS OF FREEZING RAIN IF SUB-FREEZING AIRMASSES REMAIN ENTRENCHED.
1240 AM EST SUN JAN 3 2016 LOW PRESSURE WILL MOVE SLOWLY EAST ACROSS SOUTHERN QUEBEC THROUGH SUNDAY. DRIVING AN ARCTIC COLD FRONT THROUGH THE REGION LATE IN THE DAY.
Short range models indicate weak upper level ridging pushing slowly east across the Western High Plains through Sunday night. Combined with a much drier air mass already situated across the high plains, western Kansas will remain dry through the period. The coolest night will be Sunday night as the aforementioned area of high pressure settles across the plains, along with light winds and dry air. Weak lee troughing and southerly flow will allow for some moisture return and milder overnight lows by mid-week.
418 AM EST SUN JAN 3 2016 A COLD FRONT PUSHING DOWN THROUGH THE AREA TODAY WILL USHER IN A COLDER AIRMASS TO START OFF THE WEEK.
1115 PM EST SAT JAN 2 2016 LOW PRESSURE WILL CROSS THE REGION SUNDAY.
PATCHY FREEZING FOG HAS DEVELOPED OVER SOME OF THE SOUTHWEST VALLEYS BUT IMPACTS TO KBZN HAVE BEEN BRIEF.
This will usher some slightly cooler air into the region Today.
As a result, have significantly increased cloud cover through most of the forecast area from late morning through the early afternoon, then begin to pull the back edge of the stratus eastward as the trough dipping into the Great Lakes begins to also shift east. The combination of reduce insolation and CAA will also support chilly temperatures, so have kept the 10 to 15 degree departure in highs from yesterday, and even shied a bit cooler as a trend toward the HRRR/RAP solutions.
TODAY THROUGH MONDAY NIGHT CURRENT SURFACE MAP SHOWS HIGH PRESSURE ACROSS THE DAKOTAS. WEAK CAA OVERNIGHT/EARLY THIS MORNING WILL RESULT IN SLIGHTLY COOLER HIGHS FOR TODAY. WITH HIGHS 5-10F WARMER THAN TODAY.
EXPECT PATCHY FREEZING FOG TO DEVELOP IN THE VALLEYS TONIGHT BUT CONFIDENCE IS LOW THAT IT WILL AFFECT KHLN/KBZN.
UPPER LEVEL ANALYSIS PLACES A BLOCKING PATTERN TO THE WEST RESULTING IN QUIET NORTHWESTERLY FLOW OVER OUR AREA. BLOCKING PATTERN REMAINS IN PLACE BRINGING QUIET WEATHER TO THE REGION. A SLIGHTLY COOLER AIRMASS WORKS INTO THE AREA BRINGING COOLER TEMPERATURES FOR SUNDAY. AS AN UPPER HIGH REMAINS SITUATED OVER SOUTHERN ALBERTA WHILE AN UPPER LOW CIRCULATES IN SOUTHERN OREGON. AS THE THE UPPER LOW MOVES NORTH ALONG THE WEST COAST AND ELONGATES OUT TO THE EAST. A PORTION OF ITS ENERGY UNDERCUTS THE RIDGE WITH A SEPARATE CLOSED LOW DEVELOPING SUNDAY NIGHT IN SOUTHEAST ALBERTA/SOUTHWEST SASKATCHEWAN. AS THE UPPER RIDGE REBUILDS OVER ALBERTA MONDAY. A DOWNSTREAM SOUTHEAST PUSH OF THE UPPER LOW INITIATES. THEN A SUBTLE COLD FRONT ASSOCIATED WITH THE ABOVE MENTIONED UPPER LOW SHIFTS THROUGH LATE MONDAY NIGHT NORTHWEST.
TEMPERATURES WILL BEGIN TO MODERATE LATER IN THE WEEK AS HIGH PRESSURE BUILDS EASTWARD. THE COLD FRONT THAT WILL PASS LATER TONIGHT AND TURN THE WINDS FLOW TO A MORE NORTHERLY TRAJECTORY BRINGING IN THE COLDEST AIR OF THE SEASON TO DATE.
WE/RE ON THE BACK SIDE OF LOW PRESSURE OFF TO OUR EAST. A COLD FRONT SLIPPED THROUGH OVERNIGHT AND PUT US IN A COLD AIR ADVECTION REGIME FOR TODAY.
1137 PM CST SAT JAN 2 2016 HIGH PRESSURE WILL CONTINUE OVER THE AREA THROUGH THE PERIOD.
1138 PM CST SAT JAN 2 2016 A COLD FRONT. MAINLY FOR THE HIGHER TERRAIN FROM DULUTH AND ALONG THE NORTH SHORE. THE LOW LEVEL CONVECTIVE LAYER OVER THE LAKE WILL CLIMB TO ABOUT 3500 FEET DEEP OVERNIGHT. THE PERIOD OF LIGHT SNOWFALL RATES COULD ADD UP TO A FEW INCHES OF SNOW IN THE HIGHER TERRAIN OF IRON COUNTY. THE LOWS SHOULD RANGE FROM THE MIDDLE TO UPPER TEENS. SFC AND UPPER RIDGING MOVE ACROSS THE REST OF THE FORECAST AREA SUNDAY NIGHT. THIS RIDGING COVERS THE AREA ON MONDAY.
THERE IS A DEFINED EDGE WITH DRY HIGH PRESSURE MOVING IN FROM THE WEST.
WITH PERHAPS A FEW PLACES NEAR FREEZING IN CENTRAL LOUISIANA.
HIGH TEMPERATURES LATER TODAY WILL ONLY REACH THE LOWER 30S. BROAD/MODERATE AMPLITUDE NERN CONUS TROF TO BECOMES FINELY HONED FROM EASTERN CANADIAN MARITIMES INTO LOWER GREAT LAKES BY MONDAY. THIS IN RESPONSE TO UPSTREAM BLOCKING PATTERN /DENOTED BY ALREADY HIGH BELTED REX RIDGE OVER BRITISH COLUMBIA/SASKATCHEWAN WITH ASSERTIVE NORTHWEST RIDGING THROUGH NORTHERN ALASKA INTO NORTH CENTRAL SIBERIA/ TO FORCE UPSTREAM RIDGE TO EVEN HIGHER LATITUDES INTO MONDAY. AS REXED RIDGE CENTROID NAVIGATES/FUJIWHARAS CLOCKWISE TO AN EVEN HIGHER LATITUDE AND FORCE DEEP CAA/COLDEST AIRMASS YET THIS SEASON TO PLUNGE SOUTHWARD INTO GREAT LAKES.
WITH HIGH PRESSURE AT THE SURFACE PROMOTING A CLEAR SKY. THE ENHANCED LIFT MAY HELP TO GENERATE SOME VERY LIGHT NW FLOW SNOW SHOWERS ALONG THE HIGHER TERRAIN OF THE SOUTHWEST VIRGINIA MOUNTAINS LATE TONIGHT. THOUGH ACCUMULATIONS WILL BE NO MORE THAN A DUSTING IN THE HIGHER ELEVATIONS BY DAYBREAK MONDAY MORNING.
QUIET WEATHER IS EXPECTED FOR THE REST OF THE WEEKEND AS INDIANA REMAINS CAUGHT BETWEEN LOW PRESSURE OVER CANADA AND HIGH PRESSURE OVER THE SOUTHERN PLAINS. A COLD FRONT IS EXPECTED TO PUSH TOWARD INDIANA ON SUNDAY AND ACROSS THE STATE ON SUNDAY NIGHT. COOLER AIR IS EXPECTED TO ARRIVE IN THE AREA IN THE WAKE OF THE FRONT ALONG WITH HIGH PRESSURE AS THE WORK WEEK BEGINS. CURRENT TEMPS ACROSS THE AREA ARE GENERALLY IN THE LOW 30S. SOME HINTS TOWARD THE ARRIVAL OF LOWER LEVEL CLOUDS ARE PRESENT AS THE COLD FRONT APPROACHES AND 925MB RH POINT TOWARD SATURATION. GFS AND NAM BOTH SUGGEST A COLD FRONT SWEEPING ACROSS INDIANA ON SUNDAY AS LOWER LEVEL FLOW BECOMES NORTHWESTERLY.
331 AM CST SUN JAN 3 2016 UPPER RIDGE BUILDS IN OVER THE PANHANDLES TODAY AND TONIGHT AND THEN MOVES EAST AWAY FROM THE FORECAST AREA MONDAY.
333 AM CST SUN JAN 3 2016 (Today and Tonight) Based on the current north to south movement of the clearing line early this morning, still expect some patchy fog or freezing fog to develop across the northern third of the forecast area this morning with persistence to around 9:00 AM local time this morning. Otherwise, drier air will move south through the forecast area through tonight as upper level ridging builds into the area from the west. Afternoon highs today will be warmer with lower to mid 50s expected under mostly sunny skies.
CLEAR SKIES ARE BEING SEEN AROUND THE STATE THIS MORNING WITH TEMPERATURES RANGING FROM THE LOWER 50S IN THE NORTH TO UPPER 60S ACROSS THE SOUTH. A WARM FRONT WL BE WORKING BACK TO THE NE ACRS AR TNGT. NELY WINDS BEHIND THE FNT WERE GRADUALLY BRINGING COOLER AND DRIER AIR INTO AR. HIGH TEMPS TODAY WL BE NOTABLY COOLER THAN ON MON. MAX READINGS WL BE ON THE ORDER OF 5 TO 15 DEGREES COOLER THAN ON MON.
A BACK DOOR COOL FRONT WILL MOVE INTO THE REGION LATE TODAY AND EARLY TONIGHT AS A MUCH STRONGER HIGH PRESSURE BUILDS DOWN THE EASTERN STATES. THIS HIGH WILL MOVE EAST OUT INTO THE ATLANTIC OCEAN DURING WEDNESDAY WITH THE WINDS SHIFTING TO A MORE SOUTHEASTERLY DIRECTION.
543 AM MDT TUE APR 5 2016 CURRENT WATER VAPOR LOOP SHOWED UPPER RIDGE AXIS OVER THE GREAT PLAINS. WITH A POTENT UPPER LOW/TROUGH PROGRESSING EAST ACROSS THE NORTHERN ROCKIES. A COLD FRONT WAS MOVING SOUTHEAST ACROSS NORTHWEST WY. THE SHORT RANGE MODELS HAVE BEEN MORE CONSISTENT THE PAST FEW CYCLES WITH THE TIMING AND STRENGTH OF THE UPPER TROUGH AND COLD FRONTAL PASSAGE TODAY. THE UPPER LOW AT 12Z THIS MORNING WILL BE OVER EAST-CENTRAL MT WITH THE TROUGH AXIS EXTENDING SOUTHWEST INTO EASTERN ID. THE HIGHER MOUNTAIN PEAKS COULD RECEIVE A COUPLE INCHES OF SNOW TODAY. HIGH TEMPERATURES TODAY WILL DEPEND SOLELY ON THE TIMING OF THE COLD FRONTAL PASSAGE.
A COLD FRONT WILL SWING WINDS TO THE NORTHWEST STARTING AT KGUY AT 00Z AND PASSING KAMA BY 04Z. KDHT AND KGUY WILL SEE WINDS LOWER TO AOB 12KTS BY 08Z AS LOW PRESSURE MOVES AWAY. A COLD FRONT WILL PUSH SOUTH ACROSS THE PANHANDLES THIS EVENING BETWEEN ABOUT 23Z TODAY AND 03Z TO 04Z WEDNESDAY SHIFTING THE WINDS TO THE NORTH. AN UPPER TROUGH WILL TRACK OUT OF THE CENTRAL ROCKIES INTO THE CENTRAL PLAINS STATES TONIGHT WHICH MAY ALLOW FOR ISOLATED CONVECTION TO DEVELOP MAINLY OVER THE OKLAHOMA AND THE NORTHEASTERN AND NORTH CENTRAL PORTIONS OF THE FORECAST AREA.
1236 PM EDT TUE APR 5 2016 HIGH PRESSURE CENTERED OVER LAKE MICHIGAN WILL CROSS THE AREA TODAY AND THEN MOVE OFF THE EAST COAST ON WEDNESDAY. LOW PRESSURE FROM THE PLAINS STATES WILL MOVE ACROSS THE CENTRAL GREAT LAKES BY WEDNESDAY EVENING DRAGGING A COLD FRONT ACROSS THE AREA WEDNESDAY NIGHT.
THIS WILL MIX OUT BY MIDDAY AND CONTRIBUTE TO MAX TEMPS IN THE HIGH 70S/LOW 80S RANGE. THESE CONDITIONS ARE SETTING UP FOR A WARMER THAN AVERAGE DAY. /ISSUED 333 AM CDT TUE APR 5 2016/ HIGH PRESSURE CENTERED OVER THE WESTERN GREAT LAKES EXTENDING SOUTHWARD TO THE WESTERN GULF OF MEXICO THIS MORNING. LOW PRESSURE OVER SOUTHERN SASKATCHEWAN WITH A COLD FRONT DOWN THE LEE SIDE OF THE ROCKIES. JUST NOT ENOUGH MOISTURE OR INSTABILITY TO GENERATE SIGNIFICANT PRECIPITATION ALONG THE COLD FRONT AS IT MOVES THROUGH THE CWA.
A WEATHER DISTURBANCE SWEEPING SOUTH ACROSS UTAH WILL DRAW SIGNIFICANTLY COOLER AIR IN UTAH TODAY.
BREEZY CONDITIONS WILL BE LIKELY EARLY AFTERNOON BEHIND AN EXITING COLD FRONT. THE RIDGE WILL MOVE OFF THE COAST WEDNESDAY.
WARM AND DRY CONDITIONS WILL PREVAIL ACROSS DEEP SOUTH TEXAS AND THE RIO GRANDE VALLEY TODAY THROUGH WEDNESDAY AS HIGH PRESSURE AT THE SURFACE AND ALOFT REMAINS OVER THE AREA. THE MID LEVEL RIDGE BEGINS TO FLATTEN ON WEDNESDAY AS A 500MB TROUGH MOVES ACROSS CENTRAL TEXAS.
THE 12Z KCRP SOUNDING HAS WARMER H95 TEMPS WHICH SHOULD RESULT IN SLIGHTLY WARMER CONDITIONS THIS AFTERNOON. A MID/UPPER LEVEL RIDGE WILL BEGIN TO BREAK DOWN TODAY AS IT MOVES EAST ACROSS SOUTHERN MEXICO AND AN UPPER LOW DEEPENS ALONG THE ROCKIES. THE UPPER LOW IS PROGD TO BRING A WEAK COLD FRONT THROUGH S TX ON WED. SLIGHTLY COOLER AND DRIER AIR IS PROGD BEHIND THE COLD FRONT.
930 AM EDT TUE APR 5 2016 COLD FRONT IS PUSHING THROUGH NOW AND WILL QUICKLY SHIFT SOUTH OF THE AREA THIS MORNING. TODAY WILL BE ANOTHER BEAUTIFUL SPRING DAY WITH SUNNY SKIES AND SEASONABLE TEMPS WITH HIGHS RANGING FROM THE LOW 70S ALONG THE COAST TO NEAR 80 ALONG THE I-75 CORRIDOR.
TEMPERATURES ACROSS THE FA IN THE LOW- MID 30S SO P-TYPE MAINLY LIQUID. WATER VAPOR LOOP INDICATED AN UPPER LEVEL TROUGH OVER WESTERN MT. CLOSED UPPER LEVEL LOW WILL MOVE ACROSS THE NORTHERN PLAINS TUE NIGHT AND PRODUCE RAIN/SNOW. MOST OF THE PRECIP WAS UNDER THE 700 HPA THETA-E RIDGE. LIGHT PRECIP EXPECTED LATER TUE NIGHT AS UPPER LOW MOVES OVER THE AREA. FOR A BRIEF TIME THE LARGE UPPER LOW OVER HUDSON BAY AND TROUGH INTO THE GREAT LAKES WILL SHIFT EAST AS A STORM WRAPS UP INTO EASTERN CANADA.
10 AM MDT TUE APR 5 2016 CIRCULATION FROM AN UPPER LOW OVER SOUTHWEST SASKATCHEWAN IS BRINGING RAIN AND/OR SNOW SHOWERS TO THE EASTERN PORTION OF THE COUNTY WARNING AREA. UPPER LEVEL CLOSED LOW AND ACCOMPANYING SURFACE PRESSURE LOW OVER NORTHEAST MONTANA/SASKATCHEWAN WILL PUMP MOISTURE INTO NORTH CENTRAL MONTANA THIS MORNING.
THE TROUGH OVER THE NORTHERN ROCKIES MOVES EAST AND DIGS INTO THE UPPER GREAT LAKES TONIGHT. WITH THE LOW GRADUALLY SLOPING TO THE NW WITH HEIGHT AND WITH NO INFLUENCE FROM THE UPPER-LEVEL WIND FIELD. A FARTHER NORTH TRACK OF THE H9 TO H8 LOWS DRAWS IN SOME WARMER AIR.
448 AM PDT TUE APR 5 2016 HIGH PRESSURE ALOFT AND SOME OFFSHORE FLOW WILL KEEP THE AREA DRY AND VERY WARM THROUGH WEDNESDAY.
1020 AM EDT TUE APR 5 2016 HIGH PRESSURE BUILDS TODAY. WARMER/WINDY WEDNESDAY.
603 AM CDT TUE APR 5 2016 High pressure ridge will slowly move east today as the next slipper system approaches the area from the northwest. With winds becoming more southeast with the ridge moving east of the area, some warm air advection will occur, causing temps to rise back into the 50s over the whole area. Cooler weather expected off and on with surges of colder Arctic air creeping into the Midwest throughout the forecast. That being said, mainly southerly winds for tonight will keep the lows above normal and brisk winds will stay up in advance of a developing storm system moving into the region tonight. Weak convergence on the leading edge of the frontal boundary as the low passes across northern Illinois and into the Great Lakes. with the better chances to the north associated with the low center.
807 AM EDT TUE APR 5 2016 HIGH PRESSURE WILL PROVIDE COOL AND DRY CONDITIONS TODAY WITH WARMER TEMPERATURES TOMORROW.
/ISSUED 437 AM EDT TUE APR 5 2016/ THE SHORT TERM REMAINS RELATIVELY BENIGN AS A DRY COLD FRONT IS CURRENTLY TRAVERSING THE REGION.
959 AM MDT TUE APR 5 2016 CIRCULATION FROM AN UPPER LOW OVER SOUTHWEST SASKATCHEWAN IS BRINGING RAIN AND/OR SNOW SHOWERS TO THE EASTERN PORTION OF THE COUNTY WARNING AREA. UPPER LEVEL CLOSED LOW AND ACCOMPANYING SURFACE PRESSURE LOW OVER NORTHEAST MONTANA/SASKATCHEWAN WILL PUMP MOISTURE INTO NORTH CENTRAL MONTANA THIS MORNING.
A MID/UPPER LEVEL RIDGE WILL BEGIN TO BREAK DOWN TODAY AS IT MOVES EAST ACROSS SOUTHERN MEXICO AND AN UPPER LOW DEEPENS ALONG THE ROCKIES. THE UPPER LOW IS PROGD TO BRING A WEAK COLD FRONT THROUGH S TX ON WED. SLIGHTLY COOLER AND DRIER AIR IS PROGD BEHIND THE COLD FRONT.
A LITTLE COOLER THAN PREVIOUS FORECAST THINKING. WITH HIGH PRESSURE IN PLACE OVER THE GREAT LAKES/OH VALLEY STATES.
WATER VAPOR LOOP INDICATED AN UPPER LEVEL TROUGH OVER WESTERN MT. CLOSED UPPER LEVEL LOW WILL MOVE ACROSS THE NORTHERN PLAINS TUE NIGHT AND PRODUCE RAIN/SNOW. MOST OF THE PRECIP WAS UNDER THE 700 HPA THETA-E RIDGE. LIGHT PRECIP EXPECTED LATER TUE NIGHT AS UPPER LOW MOVES OVER THE AREA. FOR A BRIEF TIME THE LARGE UPPER LOW OVER HUDSON BAY AND TROUGH INTO THE GREAT LAKES WILL SHIFT EAST AS A STORM WRAPS UP INTO EASTERN CANADA.
AN UPPER LEVEL TROUGH WILL CROSS NORTHEAST UTAH TODAY. USHERING IN A COOLER BUT DRY AIRMASS. HIGH PRESSURE ALOFT WILL SETTLE INTO THE AREA FOR THE MIDDLE OF THE WEEK.
UPPER LEVEL TROUGH WHICH BROUGHT COOLER TEMPERATURES AND CLOUDINESS TO REGION IS MOVING EAST OUT OF MONTANA AND UPPER LEVEL RIDGING IS BUILDING INTO THE AREA.
A WARM FRONT WILL BRUSH THE REGION TODAY WITH A CHANCE OF SPOTTY LIGHT RAIN.
950 AM EDT TUE APR 5 2016 HIGH PRESSURE CENTERED OVER LAKE MICHIGAN WILL CROSS THE AREA TODAY AND THEN MOVE OFF THE EAST COAST ON WEDNESDAY. LOW PRESSURE FROM THE PLAINS STATES WILL MOVE ACROSS THE CENTRAL GREAT LAKES BY WEDNESDAY EVENING DRAGGING A COLD FRONT ACROSS THE AREA WEDNESDAY NIGHT.
/ISSUED 449 AM CDT TUE APR 5 2016/ HIGH PRESSURE OVER THE GREAT LAKES EXTENDS DOWN THE MISS RIVER VALLEY WITH JUST A FEW CLOUDS OVER S AR. THEN AN EXTENSIVE AREA OF HIGH PRESSURE WILL KEEP BACK THE 80S FOR A GOOD WHILE WITH 70S FOR HIGH AND AROUND 50 OR SO GIVE OR TAKE.
A CUTOFF LOW WITHIN A NRN STREAM TROF IS DEPICTED OVER CENTRAL MT WHILE A RIDGE AXIS SHIFTS EWD ATOP THE UPR MISS RIVER VALLEY. THE RIDGE WILL DEPART TO THE E WHILE DEEPER MOISTURE MOVES INTO THE REGION IN ITS WAKE. BUT THE GENERAL CONSENSUS IS THAT MAINLY CENTRAL-ERN MN INTO WRN WI WILL SEE THE HIGHS QPF. THE OCNL PRECIP WILL CONTINUE TONIGHT INTO TMRW BUT MOSTLY AS RAIN SINCE LOW LVL TEMPS AND SFC TEMPS ARE EXPECTED TO REMAIN ABOVE FREEZING FOR MUCH OF THE CWFA. THE WED NIGHT-THU SYSTEM WILL INCLUDE A COOLER AIRMASS.
1112 AM EDT TUE APR 5 2016 HIGH PRESSURE WILL PROVIDE COOL AND DRY CONDITIONS TODAY WITH WARMER TEMPERATURES TOMORROW.
NEAR 15 KNOTS AND GUSTY WEST OF SEVEN MILE BRIDGE. AND NEAR 10 KNOTS EAST OF THE BRIDGE THIS MORNING. AN AREA OF HIGH PRESSURE IS SPLIT WITH A CENTER OVER THE NORTHWESTERN GULF OF MEXICO. CONTINENTAL HIGH PRESSURE WILL BE IN CONTROL OF THE ENVIRONMENT AROUND THE KEYS.
1256 PM EDT TUE APR 5 2016 HIGH PRESSURE WILL BUILD IN FROM THE WEST TODAY AND TONIGHT THEN MOVE EAST OF THE REGION WEDNESDAY.
Temperatures are already near near or below freezing, and should continue falling given the light winds and clear skies. Low level ridge currently extending from eastern Kansas northward into western Iowa will move eastward across Missouri this morning and early this afternoon.
OUT AHEAD OF AND ALONG A WARM FRONT. GIVEN THE TRACK OF THE LOW AND THE LARGE HIGH OVER THE UPPER GREAT LAKES. THE PRESSURE GRADIENT WILL AGAIN INCREASE BEHIND THE WARM FRONT AS THE LOW NEARS THIS AFTERNOON W.
BUILDING HIGH PRESSURE ALOFT AND AT THE SURFACE WILL FORCE AREAS OF GUSTY NORTHEAST WINDS BELOW THE PASSES AND CANYONS IN THE MORNING.
SKIES ARE MOSTLY CLEAR THROUGHOUT THE CWA THIS MORNING AND WILL REMAIN SO THROUGH MIDWEEK AS A STRONG UPPER LEVEL RIDGE OF HIGH PRESSURE BUILDS INTO CENTRAL CA FROM THE PACIFIC. THE RIDGE WILL PRODUCE A DRY OFFSHORE FLOW AND A MARKED WARMING TREND ACROSS CENTRAL CA DURING THE NEXT TWO DAYS.
HAS ALREADY SPILLED INTO THE MO VALLEY INTO THE SHORT WAVE RIDGE. MAINLY FOR VERY LIGHT FREEZING RAIN. 08Z SURFACE ANALYSIS SHOWS THE FREEZING LINE ALONG AND NE OF AN ALGONA-NEWTON LINE. AND IDOT ROAD SURFACE TEMPS SHOW THAT FREEZING LINE JUST TO THE NE OF THAT. THIS WILL ALSO BE CLOSE TO WHEN SURFACE TEMPS NUDGE BACK OVER FREEZING AS WELL COINCIDENT WITH START OF INSOLATION. THUS THE MASON CITY AND WATERLOO AREAS MAY SEE OF BRIEF WINDOW OF LIGHT FREEZING SPRINKLES TOWARD DAYBREAK BUT OF LITTLE CONSEQUENCE. LARGE LOW PRESSURES SYSTEM WILL DROP SOUTH INTO IOWA TONIGHT.
High pressure over the Ohio River Valley will move to the Mid Atlantic States this afternoon as a weak frontal boundary departs the Eastern Seaboard.
1023 AM EDT TUE APR 5 2016 HIGH PRESSURE WILL BUILD IN FROM THE WEST TODAY AND TONIGHT THEN MOVE EAST OF THE REGION WEDNESDAY.
A WARM FRONT WL BE WORKING BACK TO THE NE ACRS AR TNGT. NELY WINDS BEHIND THE FNT WERE GRADUALLY BRINGING COOLER AND DRIER AIR INTO AR. HIGH TEMPS TODAY WL BE NOTABLY COOLER THAN ON MON. MAX READINGS WL BE ON THE ORDER OF 5 TO 15 DEGREES COOLER THAN ON MON.
AN UPPER LEVEL TROUGH OVER THE NORTHERN ROCKIES TO MOVE OUT INTO THE NORTHERN PLAINS LATER THIS MORNING CONTINUES FALLING SURFACE PRESSURES IN THE HIGH PLAINS. HIGH TEMPERATURES FOR TODAY MAY BE UP TO A DEGREE OR TWO WARMER THAN YESTERDAYS. THE UPPER LEVEL TROUGH MOVES FROM THE PLAINS ACROSS THE MISSISSIPPI VALLEY TO THE GREAT LAKES WEDNESDAY. THIS FORCES A COLD FRONT TO MOVE ACROSS OUR AREA IN THE MORNING TO MIDDAY HOURS.
HIGH PRESSURE RIDGE ACROSS THE SOUTHERN PENINSULA WILL SAG FARTHER SOUTH AS BACK DOOR FRONT DROPS DOWN THE EASTERN SEABOARD.
EXPECT COOLER TEMPERATURES ACROSS THE AREA THIS AFTERNOON WITH ONGOING COOL ADVECTION. NORTHERN AREAS AND THE HIGHER ELEVATIONS OF THE APPALACHIANS WILL ONCE AGAIN SEE LOWS DROP BELOW FREEZING. A FREEZING WARNING REMAINS IN EFFECT FOR THESE AREAS TONIGHT THROUGH WEDNESDAY MORNING. CHATTANOOGA AIRPORT, TN 63 40 66 49 / 0 0 40 90 KNOXVILLE MCGHEE TYSON AIRPORT, TN 56 34 63 47 / 0 0 40 90 OAK RIDGE, TN 58 35 63 48 / 0 0 40 90 TRI CITIES AIRPORT, TN 52 28 63 42 / 0 0 20 90 TN.
813 AM EDT TUE APR 5 2016 VFR CONDITIONS CONTINUE OVER ALL THE TERMINALS THIS MORNING AS HIGH PRESSURE REMAINS ACROSS THE REGION. HIGH PRESSURE EXTENDS ACROSS MOST OF THE GULF. THERE IS AN EXTENSIVE COLD FRONT ALONG THE MID ATLANTIC STATES THAT EXTENDS SOUTHWESTWARD AND IS BEGINNING TO ENTER THE SOUTHEASTERN CONUS. THROUGH TODAY THE COLD FRONT WILL CONTINUE TO MOVE SOUTHWARD THROUGH THE SOUTHEASTERN STATES AND ENTER NORTH FLORIDA LATER TODAY. IN ADDITION HIGH PRESSURE IS FORECAST TO BUILD INTO THE ATLANTIC SEA BOARD AND SOUTHEAST. ANOTHER COLD FRONT WILL MOVE EASTWARD INTO THE SOUTHEASTERN STATES AND THE NORTHEASTERN GULF LATE WEDNESDAY AND COULD ENTER THE FLORIDA PANHANDLE WEDNESDAY NIGHT.
IS A CLASSIC SPRING SETUP FOR WARMER THAN ANTICIPATED MAXES. CONFIDENCE IS NOT HIGH IF KGBD/KRSL WILL SEE WINDS OF THAT MAGNITUDE DUE TO AN APPROACHING COLD FRONT AND SOMEWHAT RELAXED PRESSURE GRADIENT.
A WEAK BACKDOOR COLD FRONT WAS LOCATED ROUGHLY ALONG THE INTERSTATE 20 CORRIDOR. THE FRONT HAS ALREADY BECOME DIFFUSE AND WHAT IS LEFT OF IT SHOULD MOVE NORTHWARD AS A WARM FRONT DURING THE AFTERNOON HOURS.
and a cold front associated with the upper wave was drifting southeast with the wave. critical dangers with potential red flag conditions are forecast as the lower relative humidities and strongest winds should be co-located.
CURRENTLY UPPER LOW OVER MONTANA EVIDENT IN LATEST SATELLITE WILL BE THE WEATHER MAKER HERE IN MIDDLE TENNESSEE FOR WEDNESDAY AS SYSTEM DIVES SOUTHEASTWARD DRIVING A COLD FRONT INTO MISSOURI AND FAR NORTHWEST ARKANSAS BY 12Z WEDNESDAY.
A WEAK BACKDOOR COLD FRONT WAS LOCATED ROUGHLY ALONG THE INTERSTATE 20 CORRIDOR. THE FRONT HAS ALREADY BECOME DIFFUSE AND WHAT IS LEFT OF IT SHOULD MOVE NORTHWARD AS A WARM FRONT DURING THE AFTERNOON HOURS. /ISSUED 449 AM CDT TUE APR 5 2016/ HIGH PRESSURE OVER THE GREAT LAKES EXTENDS DOWN THE MISS RIVER VALLEY WITH JUST A FEW CLOUDS OVER S AR. THEN AN EXTENSIVE AREA OF HIGH PRESSURE WILL KEEP BACK THE 80S FOR A GOOD WHILE WITH 70S FOR HIGH AND AROUND 50 OR SO GIVE OR TAKE.
/ISSUED 352 PM CDT Tue Jun 23 2015/ (Tonight and Wednesday) An upper level ridge will continue to be the dominant weather feature the next 24 hours.
MID-UPPER LEVEL HIGH PRESSURE WILL REMAIN ACROSS THE SOUTH CENTRAL STATES THROUGH MIDWEEK.
THEN SHIFT THE FOCUS FOR SHOWERS AND ISOLATED TSTORMS TOWARD THE GULF COAST REGION AFTER MIDNIGHT WHILE MAINTAINING ISOLATED RAIN CHANCES OF 20% OR LESS ELSEWHERE GIVEN SHALLOW TROUGHING AND HIGH MOISTURE CONTENT IN PLACE. ANOTHER MILD AND MUGGY NIGHT WITH LOWS IN THE LOWER 70S INLAND TO UPPER 70S COAST.
904 PM CDT TUE JUN 23 2015 RELATIVELY QUIET WEATHER WILL CONTINUE THROUGH MUCH OF THE NIGHT AS A COLD FRONTAL BOUNDARY REMAINS JUST SOUTH OF ILLINOIS AND A WEAKENING MCS WEST OF IL HEADS TOWARD SOUTHERN IL. 2PM SURFACE MAP INDICATES THE COLD FRONT THE PRODUCED THE SEVERE WEATHER TO OUR NORTH AND WEST LAST EVENING HAS FINALLY SETTLED SOUTH OF OUR FORECAST AREA. WEAK HIGH PRESSURE WILL DRIFT ACROSS THE AREA TONIGHT KEEPING THINGS QUIET BEFORE THE RETURN FLOW SETS UP OVER FAR WEST CENTRAL ILLINOIS WEDNESDAY MORNING. WE SHOULD SEE A GRADUAL INCREASE IN RAIN CHANCES ACROSS THE WEST AFTER MIDNIGHT AS THE FRONTAL BOUNDARY THAT JUST PUSHED SOUTH OF OUR AREA THIS AFTERNOON STARTS TO MAKE THE TRIP BACK NORTH AS A WARM FRONT. THE WARM FRONT WILL SLOWLY LIFT NORTHWARD TOMORROW.
A WEAK UPPER TROUGH OVER THE OFFSHORE WATERS WILL SPREAD HIGH CLOUDS ACROSS WESTERN WASHINGTON TONIGHT.
/ISSUED 307 PM CDT TUE JUN 23 2015/ A FLATTENED MID LEVEL RIDGE CENTERED OVER THE PLAINS IS PROGGED TO SHIFT EAST INTO THE LOWER MISSISSIPPI VALLEY OVER THE NEXT 24 HOURS.
/ISSUED 307 PM CDT TUE JUN 23 2015/ HOT AND HUMID CONDITIONS WILL CONTINUE FOR THE NEXT COUPLE OF DAYS AS UPPER RIDGE AXIS REMAINS OVER THE REGION.
A WEAK DISTURBANCE MOVING AROUND AN UPPER LEVEL RIDGE HAS SPARKED A COMPLEX OF SHOWERS AND STORMS MOVING WESTWARD ACROSS THE ATCHAFALAYA BASIN. LOOKS LIKE A SIMILAR SET UP ON WEDNESDAY WITH ANOTHER WEAK DISTURBANCE MOVING AROUND THE RIDGE TO PROVIDE LATE IN THE AFTERNOON SCATTERED SHOWERS AND STORMS. NOTED THAT K-INDICES ARE EXPECTED TO CLIMB ABOVE THE 40 MARK WITH AMPLE DEEP MOISTURE BROUGHT IN FROM THE EAST THANKS TO A MID LEVEL RIDGE OVER THE SOUTHEASTERN STATES AND AN UPPER LEVEL LOW OVER THE SOUTHWESTERN GULF.
948 PM EDT TUE JUN 23 2015 HIGH PRESSURE RETURNS WEDNESDAY. HIGH PRESSURE WILL TRANSITION OVER THE AREA WEDNESDAY AND ALLOW FOR A TRANQUIL DAY. BENIGN WEATHER WEDNESDAY NIGHT AS HIGH PRESSURE SLOWLY MOVES EAST.
THERE IS A BIT OF AN INVERTED TROUGH OVER THE CWA WEDNESDAY AFTERNOON BUT ELEVATED INSTABILITY NOT NEARLY AS GOOD. THE FARTHER NORTHWEST YOU GO FROM THE LOW LEVEL INSTABILITY AND SURFACE BASED CONVECTION LIKELY REMAINING CAPPED.