Tropical Depression 01C
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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
20250727 132809 SSMISF18 11.0 -146.2 34 25% 3.82 -3.82 N/A 30.0 11.0 -146.6 Analysis Plot
20250728 021817 SSMISF18 11.1 -148.2 46 N/A 4.39 -4.39 N/A 30.0 10.9 -148.3 Analysis Plot
20250728 034406 SSMISF17 11.1 -148.5 46 31% 12.29 -12.29 N/A 35.0 10.9 -148.5 Analysis Plot
20250728 040235 SSMISF16 11.1 -148.6 46 39% 11.57 -11.57 N/A 35.0 10.9 -148.8 Analysis Plot
20250728 104049 GMI 10.6 -149.5 34 100% 28.87 -43.87 N/A 45.0 10.9 -149.6 Analysis Plot
20250728 113227 AMSR2 10.8 -149.6 34 12% 21.35 21.35 >65 kts 60.0 10.7 -150.6 Analysis Plot
20250728 221429 GMI 10.9 -151.2 12 100% 26.00 41.00 >65 kts 65.0 10.6 -151.2 Analysis Plot
20250729 020306 SSMISF18 10.9 -152.1 5 100% 19.56 34.56 >65 kts 70.0 10.9 -152.5 Analysis Plot
20250729 144041 SSMISF18 10.6 -154.3 N/A N/A N/A N/A N/A 110.0 10.8 -154.5 Analysis Plot
20250730 051558 SSMISF16 11.2 -157.5 N/A N/A N/A N/A N/A 105.0 11.0 -157.8 Analysis Plot
20250730 105031 GMI 11.4 -159.2 N/A N/A N/A N/A N/A 90.0 11.4 -159.1 Analysis Plot
20250730 142708 SSMISF18 11.6 -160.6 N/A N/A N/A N/A N/A 70.0 11.5 -160.5 Analysis Plot
20250730 222327 GMI 11.4 -163.3 N/A N/A N/A N/A N/A 60.0 11.8 -163.1 Analysis Plot
20250731 031721 SSMISF18 12.1 -164.9 135 6% 0.90 -0.90 N/A 45.0 11.8 -165.1 Analysis Plot
20250731 050345 SSMISF16 12.0 -165.6 101 6% 2.64 -2.64 N/A 45.0 11.9 -165.6 Analysis Plot
20250731 155416 SSMISF18 13.4 -168.8 90 17% 2.54 -2.54 N/A 45.0 12.8 -169.3 Analysis Plot
20250731 172006 SSMISF17 13.5 -169.6 101 25% 2.74 -2.74 N/A 45.0 12.9 -169.8 Analysis Plot
20250801 003234 AMSR2 13.8 -173.1 23 40% 11.63 -11.63 N/A 45.0 13.7 -172.7 Analysis Plot
20250801 030411 SSMISF18 13.4 -173.4 N/A N/A N/A N/A N/A 45.0 13.8 -173.3 Analysis Plot
20250801 063138 SSMISF16 13.8 -174.0 223 7% 2.35 -2.35 N/A 45.0 14.0 -173.9 Analysis Plot
20250801 110056 GMI 13.9 -175.0 N/A N/A N/A N/A N/A 40.0 14.3 -174.9 Analysis Plot
20250801 190723 SSMISF16 15.4 -177.7 223 N/A 1.53 -1.53 N/A 35.0 15.0 -177.6 Analysis Plot
20250801 223114 GMI 15.6 -178.9 N/A N/A N/A N/A N/A 35.0 15.1 -178.0 Analysis Plot
20250802 011539 AMSR2 16.0 -179.5 23 6% 4.19 -4.19 N/A 30.0 15.9 -179.9 Analysis Plot
20250802 055733 SSMISF17 17.4 179.1 N/A N/A N/A N/A N/A 30.0 16.2 179.7 Analysis Plot
20250802 061800 SSMISF16 17.4 178.9 N/A N/A N/A N/A N/A 30.0 16.2 179.5 Analysis Plot
20250802 115331 GMI 18.4 179.1 N/A N/A N/A N/A N/A 25.0 17.7 178.1 Analysis Plot
20250802 132849 AMSR2 18.4 176.9 N/A N/A N/A N/A N/A 30.0 18.2 177.1 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. |
