000 AXPZ20 KNHC 110953 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 1005 UTC Wed Aug 11 2021 Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0600 UTC surface analysis and satellite imagery through 0800 UTC. ...SPECIAL FEATURES... Tropical Storm Linda is centered near 14.2N 104.4W at 11/0900 UTC moving W at 8 kt. Estimated minimum central pressure is 1001 mb. Maximum sustained wind speed is 45 kt with gusts to 55 kt. Peak seas are currently 18 ft. Numerous moderate and scattered strong convection is noted within 180 nm in the southwest semicircle and 30 nm in the NE semicircle. Scattered moderate convection is elsewhere within 300 nm SW semicircle. Linda will strengthen to a hurricane Thu as it moves to the WNW. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP2.shtml and Forecast/Advisory at https://www.nhc.noaa.gov/text/MIATCMEP2.shtml for more details. Tropical Storm Kevin is centered near 19.8N 116.4W at 11/0900 UTC moving NW at 8 kt. Estimated minimum central pressure is 1001 mb. Maximum sustained wind speed is 40 kt with gusts to 50 kt. Peak seas are currently 21 ft. Numerous moderate and isolated strong convection is noted within 270 nm of the center in the SW quadrant and 90 nm in the SE quadrant. Kevin will weaken to a tropical depression late tonight or early Thu morning, and become a remnant low late Thu night or early Fri morning. Please read the latest NHC Public Advisory at https://www.nhc.noaa.gov/text/MIATCPEP1.shtml and Forecast/ Advisory at https://www.nhc.noaa.gov/text/MIATCMEP1.shtml for more details. ...TROPICAL WAVES... A tropical wave is along 85W north of 02N, moving W at 10 to 15 kt. Scattered moderate and isolated strong convection is noted from 04N to 14N between 81W and 93W. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough axis extends from 08N78W to 07N87W to 12N101W, then resumes southwest of Kevin from 13N119W to 09N136W. The ITCZ extends from 09N136W to 08N140W. Other than the convection associated with Kevin, Linda and the tropical wave, scattered moderate and isolated strong convection is noted from 02N to 09N between 77W and 80W and from 08N to 11N between 94W and 96W. Scattered moderate convection is seen from 09N to 11N between 128W and 135W. OFFSHORE WATERS WITHIN 250 NM OF MEXICO... Conditions across the Mexico offshore waters are being dominated by tropical storms Kevin and Linda. Please refer to the Special Features section above for details these storms. Otherwise, a broad ridge of high pressure is north of the tropical storms along 30N to across Baja California Norte. Gentle to moderate winds are noted offshore of Baja California Norte, along with seas of 4 to 7 ft. The latest ASCAT pass shows fresh SE-S winds in the central and northern Gulf of California, where seas are 3 to 4 ft. Seas are 5 to 8 ft in the southern Gulf of California due to outer swells associated with Kevin. For the forecast, outside of the influences of Kevin and Linda, mainly gentle to moderate winds will occasionally pulse to fresh northerly in the Tehuantepec region, with seas 4 to 7 ft. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, and WITHIN 750 NM OF ECUADOR... Moderate to fresh winds are noted in the Papagayo region. Light to gentle winds are noted elsewhere north of the monsoon trough. Moderate S-SW winds prevail south of the monsoon trough. Seas are mainly 3 to 6 ft, except 5 to 7 ft in a moderate southerly swell offshore of Ecuador and Colombia. For the forecast, fresh winds will continue in the Papagayo region through tonight. Moderate SW winds will continue S of the monsoon trough for the next several days. Enhanced thunderstorm activity is expected near the monsoon trough, off western Panama and Costa Rica through tonight as a tropical wave moves across the region. REMAINDER OF THE AREA... Please refer to the Special Features section above for details on Tropical Storm Linda and Tropical Storm Kevin. Outside of the area of winds over 25 kt and seas over 8 ft associated with the two tropical storms, a broad and weak ridge of high pressure prevails across the waters north of the monsoon trough with gentle to moderate trades under the ridge. Moderate to locally fresh S-SW winds are noted south of the monsoon trough. Seas are 4 to 7 ft in mixed long period southerly and northerly swell. For the forecast, outside of the influences of Kevin and Linda, fairly tranquil marine conditions will persist through the next several days. Large southerly swell from the Southern Hemisphere will reach the waters south of 10N by Sunday night. $$ Hagen