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Cooperative Institute for Meteorological Satellite Studies / University of Wisconsin-Madison
Tropical Cyclone 21S (Twentyone)
Archived CIMSS Product Summary
Current Time :     		NHC/JTWC
Click on product name to access the full product homepage for each specific storm
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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
08Feb2026 0430UTC 37 kts 1007 hPa
Scene CI# FT# AdjT# RawT# Eye T Cloud T
SHEAR 2.6 2.5 2.5 2.5 16.78C -1.41C
AiDT
Date Time Vmax  
08Feb2026 0430UTC 35 kts  
 
DPRINT
Date Time Vmax MSLP
08Feb2026 0500UTC 29 kts 1007 hPa
Vmax 25% Vmax 75%    
26 kts 33 kts    
DMINT
Date Time Vmax MSLP
08Feb2026 0223UTC 34 kts 1002 hPa
Vmax 25% Vmax 75% MW Instr.  
30 kts 38 kts WSFM01  
MW Sounders
Date Time Vmax MSLP
07Feb2026 2150UTC 41 kts 998 hPa
  Satellite FOV  
  NOAA-20 15  
Shear Analysis
Date Time Shear Magnitude
 Shear Direction
N/A N/AUTC N/A kts N/A deg
Deep-layer vertical wind shear interpolated to storm center derived from the CIMSS AMV-aided analyses with vortex removed
TC-Scale AMVs