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Tropical Depression Ten-E Forecast Discussion Number 6

2020-08-14 16:33:00| National Hurricane Center (East Pacific)

Issued at 800 AM PDT Fri Aug 14 2020 000 WTPZ45 KNHC 141432 TCDEP5 Tropical Depression Ten-E Discussion Number 6 NWS National Hurricane Center Miami FL EP102020 800 AM PDT Fri Aug 14 2020 Since the last advisory, the depression has maintained a small ragged band of convection in its southwest quadrant. Intensity fixes from TAFB, SAB, and UW-CIMSS (both ADT and SATCON) do not indicate that the system has changed appreciably so the intensity remains 30 kt for this advisory. The intensity guidance is generally more bullish on the future of the depression than it has been previously. The COAMPS-TC and GFS now forecast strengthening to occur in a few days, and the latter of those models forms a symmetric CDO with an eye in simulated satellite imagery around day 5. In the short term, strong northeasterly shear should continue to limit the development potential of the cyclone, but upper-level winds could become less hostile in a few days. The main change to the NHC intensity forecast was to maintain the system as a tropical cyclone through day 5 and to show some minimal strengthening near the end of the period, though it is slightly below the intensity consensus. That said, there is perhaps equal probability that the system could become a remnant low before the environmental conditions improve, in which case no increase in the system's winds will likely occur. No significant changes were made to the NHC track forecast. The depression is moving west-southwestward near 5 kt, steered by a low- to mid-level ridge to its north. The global models indicate that the ridge will weaken in a day or two, allowing the system to gain a little latitude. Regardless of its exact heading, only a slow drift is expected through early next week. FORECAST POSITIONS AND MAX WINDS INIT 14/1500Z 13.6N 131.9W 30 KT 35 MPH 12H 15/0000Z 13.4N 132.3W 30 KT 35 MPH 24H 15/1200Z 13.2N 132.9W 30 KT 35 MPH 36H 16/0000Z 13.3N 133.2W 30 KT 35 MPH 48H 16/1200Z 13.6N 133.6W 30 KT 35 MPH 60H 17/0000Z 14.1N 134.1W 30 KT 35 MPH 72H 17/1200Z 14.5N 134.7W 30 KT 35 MPH 96H 18/1200Z 14.8N 135.5W 35 KT 40 MPH 120H 19/1200Z 14.8N 136.3W 35 KT 40 MPH $$ Forecaster Zelinsky

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Tropical Depression Ten-E Forecast Advisory Number 6

2020-08-14 16:32:30| National Hurricane Center (East Pacific)

Issued at 1500 UTC FRI AUG 14 2020 000 WTPZ25 KNHC 141432 TCMEP5 TROPICAL DEPRESSION TEN-E FORECAST/ADVISORY NUMBER 6 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102020 1500 UTC FRI AUG 14 2020 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 13.6N 131.9W AT 14/1500Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST-SOUTHWEST OR 245 DEGREES AT 5 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1004 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 13.6N 131.9W AT 14/1500Z AT 14/1200Z CENTER WAS LOCATED NEAR 13.7N 131.8W FORECAST VALID 15/0000Z 13.4N 132.3W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 15/1200Z 13.2N 132.9W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 16/0000Z 13.3N 133.2W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 16/1200Z 13.6N 133.6W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 17/0000Z 14.1N 134.1W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 17/1200Z 14.5N 134.7W MAX WIND 30 KT...GUSTS 40 KT. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM ON DAY 4 AND 150 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 18/1200Z 14.8N 135.5W MAX WIND 35 KT...GUSTS 45 KT. OUTLOOK VALID 19/1200Z 14.8N 136.3W MAX WIND 35 KT...GUSTS 45 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.6N 131.9W NEXT ADVISORY AT 14/2100Z $$ FORECASTER ZELINSKY

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Tropical Storm Josephine Forecast Discussion Number 11

2020-08-14 10:36:53| National Hurricane Center (Atlantic)

Issued at 500 AM AST Fri Aug 14 2020 000 WTNT41 KNHC 140836 TCDAT1 Tropical Storm Josephine Discussion Number 11 NWS National Hurricane Center Miami FL AL112020 500 AM AST Fri Aug 14 2020 As has been the case for the last couple of days, the center of the tropical storm is displaced to the south of the main area of deep convection. Some new convective cells have been forming nearer to the estimated center, but the overall cloud pattern is quite ragged-looking at this time. ASCAT data from a few hours ago indicate that the intensity is near 35 kt, which is consistent with the latest Dvorak estimates from TAFB and SAB. NOAA data buoy 41040 confirmed that the system still has a closed circulation since it reported light westerly winds while the center of Josephine passed to its north. An Air Force Reserve Unit Hurricane Hunter aircraft is scheduled to investigate the storm later today. Josephine is beginning to move into an environment of increasing vertical shear associated with a large upper-tropospheric trough over the western Atlantic. Therefore, the window of opportunity for strengthening is closing soon. The official intensity forecast allows for some intensification during the next 24 hours before the upper-level winds become prohibitively strong. However, the NHC forecast is now above most of the model intensity guidance through 72 hours. The storm continues its west-northwestward motion and is moving at about 300/15 kt. Josephine should continue this general motion as it approaches a weakness in the subtropical ridge in 48 hours or so. Then, the cyclone should turn northward and move through the weakness in 3-4 days. Late in the forecast period, Josephine or its remnants are expected to turn north-northeastward while it approaches the higher-latitude westerlies. The official track forecast is essentially the same as the previous one, and also lies close to the latest corrected multi-model consensus. Josephine should pass far enough to the northeast of the Leeward Islands over the weekend to prevent major impacts. However, interests in the area should continue to monitor its progress until the storm has passed north of that area. FORECAST POSITIONS AND MAX WINDS INIT 14/0900Z 15.3N 53.3W 35 KT 40 MPH 12H 14/1800Z 16.5N 55.3W 40 KT 45 MPH 24H 15/0600Z 18.0N 58.1W 45 KT 50 MPH 36H 15/1800Z 19.1N 60.6W 45 KT 50 MPH 48H 16/0600Z 20.3N 62.9W 40 KT 45 MPH 60H 16/1800Z 21.6N 65.1W 35 KT 40 MPH 72H 17/0600Z 23.1N 66.7W 35 KT 40 MPH 96H 18/0600Z 26.0N 67.8W 30 KT 35 MPH 120H 19/0600Z 30.0N 66.5W 25 KT 30 MPH...POST-TROP/REMNT LOW $$ Forecaster Pasch

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Tropical Storm Josephine Forecast Advisory Number 11

2020-08-14 10:35:54| National Hurricane Center (Atlantic)

Issued at 0900 UTC FRI AUG 14 2020 000 WTNT21 KNHC 140835 TCMAT1 TROPICAL STORM JOSEPHINE FORECAST/ADVISORY NUMBER 11 NWS NATIONAL HURRICANE CENTER MIAMI FL AL112020 0900 UTC FRI AUG 14 2020 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. INTERESTS IN THE LEEWARD ISLANDS SHOULD MONITOR THE PROGRESS OF THIS SYSTEM. TROPICAL STORM CENTER LOCATED NEAR 15.3N 53.3W AT 14/0900Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 300 DEGREES AT 15 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 70NE 0SE 0SW 70NW. 12 FT SEAS.. 60NE 0SE 0SW 30NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 15.3N 53.3W AT 14/0900Z AT 14/0600Z CENTER WAS LOCATED NEAR 15.0N 52.7W FORECAST VALID 14/1800Z 16.5N 55.3W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 70NE 0SE 0SW 70NW. FORECAST VALID 15/0600Z 18.0N 58.1W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 70NE 30SE 20SW 70NW. FORECAST VALID 15/1800Z 19.1N 60.6W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 70NE 30SE 20SW 70NW. FORECAST VALID 16/0600Z 20.3N 62.9W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 60NE 30SE 20SW 60NW. FORECAST VALID 16/1800Z 21.6N 65.1W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 60NE 30SE 20SW 50NW. FORECAST VALID 17/0600Z 23.1N 66.7W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 60NE 30SE 20SW 50NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 18/0600Z 26.0N 67.8W MAX WIND 30 KT...GUSTS 40 KT. OUTLOOK VALID 19/0600Z 30.0N 66.5W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.3N 53.3W NEXT ADVISORY AT 14/1500Z $$ FORECASTER PASCH

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Tropical Depression Ten-E Forecast Discussion Number 5

2020-08-14 10:35:23| National Hurricane Center (East Pacific)

Issued at 200 AM PDT Fri Aug 14 2020 120 WTPZ45 KNHC 140835 TCDEP5 Tropical Depression Ten-E Discussion Number 5 NWS National Hurricane Center Miami FL EP102020 200 AM PDT Fri Aug 14 2020 The circulation of the depression was devoid of deep convection for several hours tonight and just recently new convection has begun to develop near the center. Although the Dvorak data T-numbers continue to decrease, a recent ASCAT overpass revealed there were several wind vectors supporting keeping the initial intensity at 30 kt. The ASCAT ambiguities from the overpass suggest that the low may be starting to become less well-defined, and if deep convection cannot persist for an appreciable amount of time, the system may open into a trough embedded in the Intertropical Convergence Zone. The current environment consisting of moderate northeasterly shear, modest moisture, and some subsidence is not expected to change all that much over the next few days. None of the intensity guidance except for the SHIPS makes the system a tropical storm. However, the simulated satellite imagery from various models do suggest that intermittent convection should continue to develop near the center in the near-term, which could provide enough vortex spin-up to keep the system a depression for a little while. The official intensity forecast is unchanged from the previous one, but it should be reiterated that the system could dissipate or degenerate to a convection-free remnant low at any time. The depression is now moving just south of west at 4 kt and is being steered by a low-level ridge to its northwest. This ridge is forecast to remain in place for the next couple of days. Over the weekend, the ridge is forecast to weaken, and with the loss of steering flow, the depression may begin to drift generally northwestward. The latest NHC forecast is little changed from the previous one and is also near the TVCE/TVCX consensus aids. FORECAST POSITIONS AND MAX WINDS INIT 14/0900Z 14.1N 131.5W 30 KT 35 MPH 12H 14/1800Z 13.9N 132.0W 30 KT 35 MPH 24H 15/0600Z 13.7N 132.6W 30 KT 35 MPH 36H 15/1800Z 13.6N 133.0W 30 KT 35 MPH 48H 16/0600Z 13.7N 133.3W 30 KT 35 MPH 60H 16/1800Z 14.1N 133.7W 30 KT 35 MPH 72H 17/0600Z 14.6N 134.0W 30 KT 35 MPH 96H 18/0600Z 15.0N 134.7W 30 KT 35 MPH 120H 19/0600Z 15.1N 135.4W 30 KT 35 MPH...POST-TROP/REMNT LOW $$ Forecaster Latto

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