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Cooperative Institute for Meteorological Satellite Studies / University of Wisconsin-Madison
Tropical Cyclone 18W (Eighteen)
Latest Real-Time 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
21Aug2026 1510UTC 43 kts 990 hPa
Scene CI# FT# AdjT# RawT# Eye T Cloud T
UNIFRM 2.9 2.6 2.8 2.8 -10.71C -43.30C
AiDT-V2
Date Time Vmax  
21Aug2026 1510UTC 40 kts  
 
DPRINT
Date Time Vmax MSLP
21Aug2026 1510UTC 31 kts 994 hPa
Vmax 25% Vmax 75%    
28 kts 35 kts    
DMINT
Date Time Vmax MSLP
21Aug2026 1409UTC 36 kts 992 hPa
Vmax 25% Vmax 75% MW Instr.  
32 kts 40 kts TMS09  
Date Time Vmax MSLP
21Aug2026 1030UTC 39 kts 994 hPa
Vmax 25% Vmax 75% MW Instr.  
34 kts 45 kts SSMISF17  
MW Sounders
Date Time Vmax MSLP
21Aug2026 1032UTC 39 kts 991 hPa
  Satellite FOV  
  17 25  
SATCON
Date Time Vmax MSLP
21Aug2026 1140UTC 40 kts 991 hPa
Consensus Members
2 (ADT+Sounders)

RI Forecast AI-RI
Date Time Current Vmax Current MPI
21Aug2026 1200UTC 35 kts 118 kts
20kt/12h 25kt/24h 30kt/24h 35kt/24h 40kt/24h 45kt/36h 55kt/48h 65kt/72h
0.4% 1.0% 0.5% 0.2% 0.1% 0.6% 0.2% 0.2%

Position Estimates ARCHER
Date Time Latitude Longitude
21Aug2026 1135UTC ---N --E
Satellite Sensor Eye Diameter Eye Cert %
GMI 37GHz 1.80 deg ---%

TC Structure MPERC
Date Time Prob. ERC onset
Full Model		 Prob. ERC onset
V-based
N/A N/AUTC N/A N/A
 
MIMIC-TPW
 
MIMIC-TC
 
Shear Analysis
Date Time Shear Magnitude
 Shear Direction
21Aug2026 1200UTC 18 kts 80 deg
Deep-layer vertical wind shear interpolated to storm center derived from the CIMSS AMV-aided analyses with vortex removed
TC-Scale AMVs