FANDOM


Post-Tropical Cyclone John Discussion Number 21

Wiki-Hurricanes Forecast Center

2:00 PM PDT Fri Aug 10 2018

John is no longer a tropical cyclone, having been devoid of convection for more than 12 hours. The system is entirely composed of low-level stratiform cumulus and some remaining high ice clouds tied to the remaining mid-level vorticity. An ASCAT scatterometer pass at 1719Z showed a small area of 30 kt winds, so the intensity has been reduced further to 30 kt. John continues to track northwest and should do so for two days before the low-level ciruclation center curves northeast in a weak steering environment. At this juncture the mid-level rotation is expected to decouple and track further north; both moisture components may bring some rain across California early next week.

MAXIMUM WINDS FORECAST

INIT 10/2100Z 30 KT 35 MPH...POST-TROP/REMNT LOW

12H 11/0600Z 25 KT 30 MPH...POST-TROP/REMNT LOW

24H 11/1800Z 20 KT 25 MPH...POST-TROP/REMNT LOW

36H 12/0600Z 20 KT 25 MPH...POST-TROP/REMNT LOW

48H 12/1800Z 15 KT 20 MPH...POST-TROP/REMNT LOW

72H 13/1800Z...DISSIPATED

Community content is available under CC-BY-SA unless otherwise noted.