Tropical Depression 06B
Passive Microwave (PMW) Intensity Information Advanced Dvorak Technique Version 9.1 |
--Overpass-- --ARCHER-- Ring Ring Eye BT -Forecast- Date Time Sat Lat Lon Diam Pct TbDiff Score Meaning Vmax Lat Lon 20231023 115913 SSMISF17 18.3 87.5 N/A N/A N/A N/A N/A 35.0 18.1 87.3 Analysis Plot 20231023 200935 AMSR2 19.5 88.5 12 100% 27.81 -42.81 N/A 50.0 19.5 88.4 Analysis Plot 20231024 000418 GMI 19.8 89.1 12 100% 57.02 -72.02 N/A 50.0 19.6 88.6 Analysis Plot 20231024 003142 SSMISF17 19.6 89.2 12 100% 25.19 40.19 >65 kts 70.0 20.0 89.4 Analysis Plot 20231024 070337 AMSR2 20.5 90.6 N/A N/A N/A N/A N/A 80.0 20.6 90.7 Analysis Plot 20231024 114559 SSMISF17 21.1 91.6 46 25% 4.85 4.85 N/A 80.0 21.0 91.2 Analysis Plot 20231024 191354 AMSR2 21.8 91.5 N/A N/A N/A N/A N/A 75.0 21.9 92.4 Analysis Plot 20231024 231022 GMI 22.1 91.8 N/A N/A N/A N/A N/A 75.0 22.1 92.6 Analysis Plot 20231025 001718 SSMISF17 21.5 92.3 N/A N/A N/A N/A N/A 60.0 22.3 92.8 Analysis Plot 20231025 113251 SSMISF17 22.6 95.3 N/A N/A N/A N/A N/A 25.0 23.1 93.6 Analysis Plot 20231025 122944 GMI 22.5 95.4 N/A N/A N/A N/A N/A 25.0 23.1 93.7 Analysis Plot |
Legend - Overpass Date/Time are determined from satellite overpass of targeted TC (position determined from Best Track Lat/Lon position). Date is YYYYMMDD and time in HHMMSS (UTC). - Forecast (Best Track) and ARCHER positions (deg) of the TC center at overpass day/time. Positive/Negative: Latitude = North/South Hemisphere; Longitude = Eastern/Western Hemisphere. - BT Vmax is the concurrent ATCF Best Track (BT) wind speed intensity estimate (Vmax) value from either NOAA/National Hurricane Center (NHC) (North Atlantic and Northeast Pacific), NOAA/Central Pacific Hurricane Center (CPHC) (North-central Pacific) or Joint Typhoon Warning Center (JTWC) (Northwest Pacific, Indian Ocean, or Southwest Pacific). - Sat is the satellite descriptor providing the overpass. Currently the satellites used are the DMSP/SSMIS-16/17/18, GPM/GMI, and GCOM/AMSR2. - Ring Diam (km) indicates the estimated surface eyewall diameter if one is analyzed in the PMW imagery. The value listed is the average PMW-estimated inner eyewall edge diameter minus 10 km for eyewall slope. N/A indicates no appreciable eyewall is analyzed. - Ring Pct is the percentage of the analyzed "ring" (eyewall inner boundary) that is 1) colder than the eye Tb (the "hot spot" -- warmest eye pixel) by at least 20K, or 2) that is colder than 232K and colder than the eye Tb by 10K, whichever is greater. Values are red if Ring % ≤65,yellow/brown if Ring % ≤85 and green if Ring % >85. N/A indicates no appreciable eyewall is analyzed. A value over 85% is used in the intensity score by adding 15 points to it. - TbDiff is the difference between the warmest eye pixel and the warmest pixel on the eyewall. This value is used in the Intensity Score. N/A indicates no appreciable eyewall is analyzed. - Eye Score values are based on the strength and organization of the convective/eyewall signatures in the PMW imagery, and based on the ARCHER center location. They normally range from 0 to 100 with empirically-determined thresholds related to intensity (Vmax) in the "Meaning" column (≥20 suggests ≥65kts; ≥60 suggests ≥85kts). Scores are listed as negative, and not used by the ADT, when the NHC, CPHC, or JTWC Best Track Vmax is <55 kts in order to filter out occasional "false eye" cases. A value of -920 is used when the warmest eye pixel is <200K to prevent false positives; -930 means edge of overpass and <85% of eyewall is captured and therefore can't fully be analyzed. |