Tropical Depression 21S
|
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
20240405 171904 AMSR2 -13.0 120.4 34 42% 2.71 -2.71 N/A 35.0 -13.4 120.2 Analysis Plot
20240405 231752 GMI -13.1 121.5 N/A N/A N/A N/A N/A 35.0 -13.5 120.2 Analysis Plot
20240406 053331 AMSR2 -13.1 120.0 135 64% 5.61 -5.61 N/A 50.0 -13.1 120.1 Analysis Plot
20240406 223556 GMI -14.3 119.5 34 100% 36.39 51.39 >65 kts 65.0 -14.6 119.6 Analysis Plot
20240407 100735 GMI -15.3 119.2 23 100% 81.19 96.19 >85 kts 100.0 -15.1 119.1 Analysis Plot
20240407 170804 AMSR2 -15.9 119.0 12 100% 42.44 57.44 >65 kts 120.0 -16.0 118.8 Analysis Plot
20240408 052136 AMSR2 -17.1 119.0 N/A N/A N/A N/A N/A 75.0 -17.0 118.1 Analysis Plot
20240408 092414 GMI -17.0 119.8 N/A N/A N/A N/A N/A 75.0 -16.7 118.4 Analysis Plot
20240408 224714 GMI -17.1 117.9 N/A N/A N/A N/A N/A 45.0 -17.2 117.6 Analysis Plot
20240409 060256 AMSR2 -18.0 116.9 N/A N/A N/A N/A N/A 45.0 -17.9 116.8 Analysis Plot
20240409 220521 GMI -19.6 117.1 12 79% 5.85 -5.85 N/A 40.0 -19.0 115.7 Analysis Plot
20240410 173946 AMSR2 -21.3 114.6 N/A N/A N/A N/A N/A 35.0 -21.3 114.5 Analysis Plot
20240411 055008 AMSR2 -22.3 113.5 N/A N/A N/A N/A N/A 25.0 -22.5 113.5 Analysis Plot
20240411 085113 GMI -22.8 113.7 N/A N/A N/A N/A N/A 25.0 -22.6 113.4 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. |
