Tropical Depression 05B
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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
20251127 104740 SSMISF18 7.2 81.9 179 14% 2.65 -2.65 N/A 35.0 7.4 81.9 Analysis Plot
20251127 131151 SSMISF16 7.4 81.6 223 25% 5.99 -5.99 N/A 35.0 7.7 81.6 Analysis Plot
20251127 202452 AMSR2 7.9 81.3 N/A N/A N/A N/A N/A 35.0 8.1 81.2 Analysis Plot
20251128 003338 SSMISF17 7.5 81.3 N/A N/A N/A N/A N/A 35.0 8.2 81.1 Analysis Plot
20251128 015124 SSMISF16 7.6 81.3 N/A N/A N/A N/A N/A 35.0 8.2 81.1 Analysis Plot
20251128 074437 GMI 8.4 81.0 N/A N/A N/A N/A N/A 35.0 8.4 81.0 Analysis Plot
20251128 191926 GMI 8.9 80.8 N/A N/A N/A N/A N/A 35.0 9.1 80.7 Analysis Plot
20251129 001948 SSMISF17 9.0 80.4 N/A N/A N/A N/A N/A 35.0 9.5 80.6 Analysis Plot
20251129 013647 SSMISF16 9.0 80.6 N/A N/A N/A N/A N/A 35.0 9.6 80.8 Analysis Plot
20251129 075607 AMSR2 9.6 81.2 N/A N/A N/A N/A N/A 35.0 10.2 80.8 Analysis Plot
20251129 183825 GMI 10.6 81.3 N/A N/A N/A N/A N/A 35.0 10.6 80.8 Analysis Plot
20251129 183836 GMI 10.3 80.2 N/A N/A N/A N/A N/A 35.0 10.7 80.8 Analysis Plot
20251129 201149 AMSR2 10.8 80.8 N/A N/A N/A N/A N/A 30.0 10.8 80.8 Analysis Plot
20251129 225738 SSMISF18 10.9 80.8 N/A N/A N/A N/A N/A 30.0 10.9 80.8 Analysis Plot
20251130 012243 SSMISF16 11.1 80.8 335 N/A 0.25 -0.25 N/A 30.0 11.1 80.8 Analysis Plot
20251130 100725 SSMISF18 11.8 80.8 201 N/A 1.13 -1.13 N/A 30.0 11.8 80.8 Analysis Plot
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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. |
