Tropical Storm Hernan

EP082026 Eastern Pacific

Current Conditions

As of Aug 15, 09:00 PM UTC

Position
15.8°N 135.9°W
Intensity
25 kt
Pressure
1009.0 mb
Classification
Post-Tropical Cyclone
Movement
270° at 10 kt

Track & cone

Best track Forecast track Cone
Intensity: D TD TS Cat 1 Cat 2 Cat 3 Cat 4 Cat 5 L Post-tropical / low Radii: 34 50 64 kt · click points for detail
NHC Advisory 012 Aug 15, 08:42 PM UTC
000
WTPZ43 KNHC 152042
TCDEP3
 
Post-Tropical Cyclone Hernan Discussion Number  12
NWS National Hurricane Center Miami FL       EP082026
1100 AM HST Sat Aug 15 2026
 
Hernan continues to remain a swirl of low- to mid-level clouds with 
no active deep convection. A recent ASCAT pass showed that the winds 
are around 20 to 25 kts at most in the northern portion of the 
cyclone. As a result of that, the initial intensity has been lowered 
to 25 kt. 
 
Given that the cyclone is moving into an area of higher shear and 
drier air, gradual weakening is expected over the next couple of 
days. The current forecast calls for Hernan to become a trough in 
about 60 h in agreement with the global models.
 
The initial motion is 255/10 kt. A low- to mid-level ridge to the
north should steer Hernan and its remnants westward for the next
few days. The new forecast track is similar to, but a little faster
than, the previous track.
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  15/2100Z 15.8N 135.9W   25 KT  30 MPH...POST-TROPICAL
 12H  16/0600Z 15.9N 137.5W   25 KT  30 MPH...POST-TROP/REMNT LOW
 24H  16/1800Z 16.1N 139.8W   20 KT  25 MPH...POST-TROP/REMNT LOW
 36H  17/0600Z 16.4N 141.7W   20 KT  25 MPH...POST-TROP/REMNT LOW
 48H  17/1800Z 16.5N 143.7W   20 KT  25 MPH...POST-TROP/REMNT LOW
 60H  18/0600Z...DISSIPATED
 
$$
Forecaster Katz/Berg
 

Track

Time Position Intensity Pressure Class
Observed · best track
Aug 13, 06:00 PM UTC 17.8°N 132.1°W 40 kt 1003.0 mb Tropical Storm
Aug 14, 12:00 AM UTC 17.1°N 131.9°W 35 kt 1004.0 mb Tropical Storm
Aug 14, 06:00 AM UTC 16.5°N 131.9°W 35 kt 1004.0 mb Tropical Storm
Aug 14, 12:00 PM UTC 15.6°N 132.0°W 35 kt 1004.0 mb Tropical Storm
Aug 14, 06:00 PM UTC 15.6°N 132.0°W 30 kt 1006.0 mb Tropical Depression
Aug 15, 12:00 AM UTC 16.1°N 132.1°W 30 kt 1005.0 mb Tropical Depression
Aug 15, 06:00 AM UTC 16.3°N 133.2°W 30 kt 1006.0 mb Tropical Depression
Aug 15, 12:00 PM UTC 16.1°N 134.4°W 30 kt 1006.0 mb Tropical Depression
Aug 15, 06:00 PM UTC 15.8°N 135.4°W 25 kt 1009.0 mb Tropical Depression
Aug 15, 09:00 PM UTC 15.8°N 135.9°W 25 kt 1009.0 mb Post-Tropical Cyclone
Forecast NHC official · issued Aug 15, 06:00 PM UTC
Aug 16, 06:00 AM UTC +12h 15.9°N 137.5°W 25 kt — Low
Aug 16, 06:00 PM UTC +24h 16.1°N 139.8°W 20 kt — Low
Aug 17, 06:00 AM UTC +36h 16.4°N 141.7°W 20 kt — Low
Aug 17, 06:00 PM UTC +48h 16.5°N 143.7°W 20 kt — Low

Recon & fixes

Latest fix

Dvorak (subjective)

Newest observation of any type. No aircraft fix received for this storm.

Aug 15, 06:00 PM UTC 72 d ago
Pressure
—
Wind
—
Center fix
16.0°N 135.3°W
Time Source Position Wind Pressure Notes
Aug 15, 06:00 PM UTC Dvorak (subjective) 16.0°N 135.3°W — — TAFB
Aug 15, 05:40 PM UTC Dvorak (objective) 16.1°N 135.4°W ref 25 kt 1006.0 mb CIMS
Aug 15, 03:00 PM UTC Dvorak (subjective) 16.1°N 134.8°W — — TAFB
Aug 15, 02:40 PM UTC Dvorak (objective) 16.1°N 134.8°W ref 25 kt 1006.0 mb CIMS
Aug 15, 12:00 PM UTC Dvorak (subjective) 16.0°N 134.4°W 30 kt 1009.0 mb TAFB · The center is completely exposed W of the deep conve
Aug 15, 11:40 AM UTC Dvorak (objective) 16.4°N 134.3°W ref 31 kt 1005.0 mb CIMS
Aug 15, 10:51 AM UTC Microwave 16.4°N 134.1°W ref 36 kt 1002.0 mb meas CIMS · CIMSS ADT/AiDT/DPRINT CIMSS SSMIS/DMINT
Aug 15, 09:56 AM UTC Microwave 16.4°N 134.0°W ref 36 kt 1003.0 mb meas CIMS · CIMSS ADT/AiDT/DPRINT CIMSS SSMIS/DMINT
Aug 15, 09:00 AM UTC Dvorak (subjective) 16.2°N 134.0°W — — TAFB
Aug 15, 08:40 AM UTC Dvorak (objective) 16.4°N 133.7°W ref 33 kt 1004.0 mb CIMS
Aug 15, 08:35 AM UTC Scatterometer 16.1°N 133.4°W 25 kt — KNHC · OSCAT Pass at 0835z found peak winds at 25kt
Aug 15, 06:00 AM UTC Dvorak (subjective) 16.4°N 133.2°W — — TAFB

72 observations · 16 ATCF working-record analysis records not shown
Observed fixes from NHC's ATCF fix deck. Operational data, subject to later revision.