ATCF Probability Format 11/2020 COMMON FIELDS ------------- Basin, CY, YYYYMMDDHH, ProbFormat, Tech, TAU, LatN/S, LonE/W, Prob, ... Common section, fields 1 - 9, followed by a specific format, examples follow: Track related data Intensity probability Rapid Intensification probabilities Rapid Decay probabilities Wind Radii estimated errors Pressure estimated error TC Genesis probability TC Genesis shape Eyeway Replacement forecast probabilities Basin - basin, e.g. WP, IO, SH, CP, EP, AL, LS, 2 char. CY - annual cyclone number: 1 through 99, 2 char. YYYYMMDDHH - Warning Date-Time-Group: 0000010100 through 9999123123, 10 char. ProbFormat - 2 char. TR - track, "03" also accepted for existing old edeck files IN - intensity RI - rapid intensification RW - rapid weakening WR - wind radii PR - pressure GN - TC genesis probability GS - TC genesis shape ER - eyewall replacement Tech - acronym for each objective technique, 4 char. TAU - forecast period: 0 through 168 hours, 3 char. LatN/S - Latitude (tenths of degrees) for the DTG: 0 through 900, N/S is the hemispheric index, 4 char. LonE/W - Longitude (tenths of degrees) for the DTG: 0 through 1800, E/W is the hemispheric index, 5 char. Prob - probability of ProbItem (see parameter specific definition of ProbItem), 0 - 100%, 3 char. ------------------- TRACK RELATED VALUES ProbItem - Probability radius, 0 through 2000 nm, 4 char. TY - Level of tc development: currently unused, 2 char. Dir - Cross track direction, 0 through 359 degrees, 3 char. WindCode - Radius code: currently unused, 3 char. rad_cross - Cross track radius, 0 through 2000 nm, 4 char. rad_along - Along track radius, 0 through 2000 nm, 4 char. bias_cross - Cross track bias, -999 through 999 nm, 4 char. bias_along - Along track bias, -999 through 999 nm, 4 char. ---- WIND RADII PROBABILITY ProbItem - Wind speed (bias adjusted), 0 - 300 kts, 3 char. TH - Wind Threshold (e.g., 34), 2 char. Half_Range - Half the probability range (radius in n mi), 15 - 200 n mi, 4 char. ---- INTENSITY PROBABILITY ProbItem - Wind speed (bias adjusted), 0 - 300 kts, 3 char. TY - Level of tc development: currently unused, 2 char. Half_Range - Half the probability range (radius), 0 - 50 kts, 4 char. ---- RAPID INTENSIFICATION PROBABILITY ProbItem - intensity change, 0 - 300 kts, 3 char. V - final intensity, 0 - 300 kts, 3 char. Initials - forecaster initials, 3 char. RIstartTAU - RI start time: 0 through 168 hours, 3 char. RIstopTAU - RI stop time: 0 through 168 hours, 3 char. ---- RAPID WEAKENING PROBABILITY ProbItem - intensity change, 0 - 300 kts, 3 char. V - final intensity, 0 - 300 kts, 3 char. Initials - forecaster initials, 3 char. RWstartTAU - RW start time: 0 through 168 hours, 3 char. RWstopTAU - RW stop time: 0 through 168 hours, 3 char. ---- TC GENESIS PROBABILITY ProbItem - time period, ie genesis during next xxx hours, 0 for genesis or dissipate event, 0 - 240 hrs, 4 char. Initials - forecaster initials, 3 char. GenOrDis - "invest", "genFcst", "genesis", "disFcst" or "dissipate" DTG - Genesis or dissipated event Date-Time-Group, yyyymmddhhmm: 0000010100 through 9999123123, 12 char. stormID - cyclone ID if the genesis developed into an invest area or cyclone ID of dissipated TC, e.g. al032014 min - minutes, associated with DTG in common fields (3rd field in record), 0 - 59 min genesisNum - genesis number, if spawned from a genesis area (1-999) undefined - TBD ---- TC GENESIS SHAPE ProbItem - time period, ie genesis during next xxx hours, 0 - 240 hrs, 4 char. Initials - forecaster initials, 3 char. TCFAMANOPDTG - TCFA MANOP dtg, ddhhmm TCFAMSGDTG - TCFA message dtg, yymmddhhmm TCFAWTNUM - TCFA WT number, 2 char. ShapeType - shape type, ELP - ellipse, BOX - box, CIR - circle, PLY - polygon, 3 char. EllipseAngle - cross track angle for ellipse (math coords), 3 char. EllipseRCross - cross track radius, 0 - 2000 nm, 4 char. EllipseRAlong - along track radius, 0 - 2000 nm, 4 char. Box1LatN/S - Latitude for start point for TCFA box center line or center point for TCFA circle, 4 char. 0 - 900 tenths of degrees N/S is the hemispheric index Box1LonE/W - Longitude for start point for TCFA box center line or center point for TCFA circle, 5 char. 0 - 1800 tenths of degrees E/W is the hemispheric index Box2LatN/S - Latitude for end point for TCFA box center line, not used for TCFA circle, 4 char. 0 - 900 tenths of degrees N/S is the hemispheric index Box2LonE/W - Longitude for start point for TCFA box center line, not used for TCFA circle, 5 char. 0 - 1800 tenths of degrees E/W is the hemispheric index TCFARADIUS - distance from center line to box edge, or radius of circle (nm), 3 char. PolygonPts - array of 20 lat, lon points defining a polygon ---- EYEWALL REPLACEMENT PROBABILITY ProbItem - intensity change, 0 - 300 kts, 3 char. V - final intensity, 0 - 300 kts, 3 char. Initials - forecaster initials, 3 char. ERstartTAU - RW start time: 0 through 168 hours, 3 char. ERstopTAU - RW stop time: 0 through 168 hours, 3 char.