Tactical Decision Aids
Click on graphic above to view Critical Tail Wind TDA
Click on graphic above to view Thunderstorm TDA
Latest Discussion
806 AM CST MON JAN 26 2015 //ORD AND MDW CONCERNS...UPDATED 14Z..

* LIGHT SNOW DEVELOPING AROUND MID-DAY. MVFR CIGS/IFR VSBY POSSIBLE THIS AFTERNOON. MINOR ACCUMULATIONS

* IFR CIGS AND MVFR FOG POSSIBLE TONIGHT WITH LINGERING FLURRIES

* LIGHT/VARIABLE WINDS BECOME LIGHT SOUTH TODAY AND SOUTHEAST THIS EVENING. GENERALLY LESS THAN 10 KT. WINDS THEN BECOME LIGHT EAST-NORTHEAST LATE TONIGHT

RATZER/DEUBELBEISS //DISCUSSION...UPDATED 12Z..

WEAK SURFACE HIGH PRESSURE OVER THE AREA WILL MOVE QUICKLY OFF TO THE SOUTHEAST THIS MORNING...AS AN AREA OF LOW PRESSURE RAPIDLY APPROACHES FROM THE UPPER MIDWEST. VFR CLOUDS EXPECTED TO LOWER THROUGH THE MORNING...WITH DEVELOPMENT OF LIGHT SNOW AND MVFR CIGS BY/AROUND MID-DAY. A PERIOD OF LIGHT ACCUMULATING SNOW IS LIKELY THROUGH THE AFTERNOON...WITH OCCASIONAL IFR VSBYS. SNOW IS EXPECTED TO TAPER OFF BY EVENING THOUGH WILL LINGER IN LIGHTER FASHION AND MAY MIX OR CHANGE TO FREEZING DRIZZLE LATE BEFORE ENDING. MOIST LOW LEVELS AND LIGHT WINDS SUPPORT A PERIOD OF IFR CIGS AND MVFR VSBYS IN FOG OVERNIGHT AS THE SURFACE LOW FILLS TO JUST A TROUGH. SNOW ACCUMULATIONS LOOK TO RANGE FROM PERHAPS AN INCH AROUND RFD...TO LESS THAN AN INCH FARTHER EAST ACROSS CHI METRO TERMINALS

WINDS CURRENTLY LIGHT/VARIABLE AS THE SURFACE RIDGE AXIS PASSES ACROSS THE FORECAST AREA EARLY THIS MORNING. WINDS TO SHIFT SOUTH DURING THE MORNING...THEN SOUTHEAST BY EVENING. SPEEDS GENERALLY LESS THAN 10 KTS...THOUGH IF APPROACHING LOW IS SLOWER TO WEAKEN THAN EXPECTED SOUTHEAST WINDS AROUND 10 KT WOULD BE POSSIBLE LATER THIS AFTERNOON. WINDS TO TURN LIGHT NORTHEAST LATER TONIGHT INTO EARLY TUESDAY

RATZER //ORD AND MDW CONFIDENCE...UPDATED 14Z..

* HIGH CONFIDENCE IN WIND TRENDS

* MEDIUM CONFIDENCE IN SNOW TIMING/INTENSITY TODAY INTO THIS EVENING

* MEDIUM-LOW CONFIDENCE IN VIS/CIG TRENDS OVERNIGHT

RATZER/DEUBELBEISS //OUTLOOK FOR ORD/MDW FOR 00Z WEDNESDAY-12Z MONDAY...UPDATED 12Z..

TUESDAY NIGHT...MAINLY VFR

WEDNESDAY...MAINLY VFR DURING THE DAY. CHANCE OF RAIN/SNOW AT NIGHT WITH MVFR/IFR POSSIBLE

THURSDAY...CHANCE OF LIGHT SNOW. MVFR LIKELY/IFR POSSIBLE

FRIDAY...MAINLY VFR

SATURDAY...CHANCE OF SNOW/MVFR CIGS

SUNDAY...MVFR CIGS POSSIBLE

RATZER
Latest Terminal Forecast
Could not connect : Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)