Tropical Depression 18S
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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
20240312 071358 GMI -13.7 107.5 N/A N/A N/A N/A N/A 40.0 -13.9 107.2 Analysis Plot
20240312 180906 AMSR2 -14.1 109.2 N/A N/A N/A N/A N/A 40.0 -13.6 109.5 Analysis Plot
20240313 063313 GMI -15.1 110.8 N/A N/A N/A N/A N/A 35.0 -14.9 111.5 Analysis Plot
20240313 202327 SSMISF18 -15.9 114.7 N/A N/A N/A N/A N/A 35.0 -15.8 114.6 Analysis Plot
20240314 055154 GMI -16.3 114.8 N/A N/A N/A N/A N/A 35.0 -15.8 114.7 Analysis Plot
20240314 175800 AMSR2 -16.8 115.5 N/A N/A N/A N/A N/A 35.0 -17.3 116.1 Analysis Plot
20240315 060948 AMSR2 -17.6 117.3 N/A N/A N/A N/A N/A 35.0 -17.8 116.3 Analysis Plot
20240315 164135 GMI -18.0 112.9 N/A N/A N/A N/A N/A 35.0 -17.9 114.2 Analysis Plot
20240316 174516 AMSR2 -16.5 113.5 N/A N/A N/A N/A N/A 35.0 -16.7 113.7 Analysis Plot
20240317 052318 GMI -17.4 113.3 N/A N/A N/A N/A N/A 35.0 -17.1 114.2 Analysis Plot
20240317 055756 AMSR2 -17.5 112.9 N/A N/A N/A N/A N/A 35.0 -17.1 113.0 Analysis Plot
20240318 064120 AMSR2 -18.5 112.0 N/A N/A N/A N/A N/A 30.0 -17.4 112.1 Analysis Plot
20240318 161002 GMI -18.7 111.8 N/A N/A N/A N/A N/A 30.0 -17.1 111.9 Analysis Plot
20240318 173346 AMSR2 -18.6 111.8 N/A N/A N/A N/A N/A 30.0 -17.1 111.9 Analysis Plot
20240320 045108 GMI -17.7 109.7 46 24% 13.82 -13.82 N/A 35.0 -17.8 109.7 Analysis Plot
20240321 153911 GMI -17.8 104.3 12 100% 37.22 52.22 >65 kts 105.0 -17.7 104.2 Analysis Plot
20240322 050252 GMI -18.1 101.3 5 92% 16.92 31.92 >65 kts 115.0 -18.0 101.4 Analysis Plot
20240322 234524 SSMISF16 -19.3 96.5 N/A N/A N/A N/A N/A 90.0 -19.1 96.3 Analysis Plot
20240322 235144 SSMISF17 -19.4 96.5 23 57% 16.35 16.35 N/A 90.0 -19.4 96.3 Analysis Plot
20240323 102048 SSMISF18 -20.7 94.1 201 31% 0.52 0.52 N/A 80.0 -20.4 93.8 Analysis Plot
20240323 122415 SSMISF17 -20.9 93.4 179 19% 0.33 0.33 N/A 80.0 -20.6 93.6 Analysis Plot
20240323 154916 GMI -21.6 92.7 N/A N/A N/A N/A N/A 70.0 -20.9 92.9 Analysis Plot
20240323 213420 SSMISF18 -23.0 92.0 N/A N/A N/A N/A N/A 60.0 -21.4 91.5 Analysis Plot
20240323 233916 SSMISF17 -23.1 91.5 N/A N/A N/A N/A N/A 60.0 -22.3 91.0 Analysis Plot
20240324 051414 GMI -23.7 90.5 23 85% 10.95 -10.95 N/A 50.0 -22.6 90.3 Analysis Plot
20240324 100606 SSMISF18 -23.9 90.5 N/A N/A N/A N/A N/A 40.0 -23.0 89.4 Analysis Plot
20240324 121035 SSMISF17 -23.0 89.1 168 N/A 3.20 -3.20 N/A 35.0 -23.1 89.0 Analysis Plot
20240324 212232 SSMISF18 -24.0 87.6 68 N/A 1.38 -1.38 N/A 30.0 -24.1 87.6 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. |
