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Cooperative Institute for Meteorological Satellite Studies / University of Wisconsin-Madison
Tropical Cyclone 04W (Sinlaku)
Archived CIMSS Product Summary
Current Time :     		NHC/JTWC
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Product Latency Color Code : Less than 3 hours old   3 - 6 hours old   6 - 12 hours old   Greater than 12 hours old   Not Available
Current Intensity Estimates ADT
Date Time Vmax MSLP
11Apr2026 0700UTC 79 kts 971 hPa
Scene CI# FT# AdjT# RawT# Eye T Cloud T
UNIFRM 4.6 4.6 4.6 3.6 -71.09C -75.76C
AiDT
Date Time Vmax  
11Apr2026 0700UTC 79 kts  
 
DPRINT
Date Time Vmax MSLP
11Apr2026 0700UTC 83 kts 966 hPa
Vmax 25% Vmax 75%    
75 kts 91 kts    
DMINT
Date Time Vmax MSLP
11Apr2026 0550UTC 74 kts 969 hPa
Vmax 25% Vmax 75% MW Instr.  
67 kts 82 kts SSMISF18  
Date Time Vmax MSLP
11Apr2026 0549UTC 75 kts 968 hPa
Vmax 25% Vmax 75% MW Instr.  
68 kts 82 kts SSMISF18

RI Forecast AI-RI
Date Time Current Vmax Current MPI
11Apr2026 0000UTC 75 kts 9999 kts
20kt/12h 25kt/24h 30kt/24h 35kt/24h 40kt/24h 45kt/36h 55kt/48h 65kt/72h
42.9% 55.3% 42.9% 35.2% 38.4% 41.1% 26.4% 30.9%

Position Estimates ARCHER
Date Time Latitude Longitude
11Apr2026 0550UTC 8.79N 151.52E
Satellite Sensor Eye Diameter Eye Cert %
SSMIS-18 85-92GHz 0.30 deg 97.9%

TC Structure MPERC
Date Time Prob. ERC onset
Full Model		 Prob. ERC onset
V-based
11Apr2026 0500UTC 13% 16%
 
MIMIC-TPW
 
MIMIC-TC
 
Shear Analysis
Date Time Shear Magnitude
 Shear Direction
11Apr2026 600UTC 15 kts 104 deg
Deep-layer vertical wind shear interpolated to storm center derived from the CIMSS AMV-aided analyses with vortex removed
TC-Scale AMVs