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Tropical Depression Twenty-Two Forecast Advisory Number 3
2020-09-18 10:36:34| National Hurricane Center (Atlantic)
Issued at 0900 UTC FRI SEP 18 2020 000 WTNT22 KNHC 180836 TCMAT2 TROPICAL DEPRESSION TWENTY-TWO FORECAST/ADVISORY NUMBER 3 NWS NATIONAL HURRICANE CENTER MIAMI FL AL222020 0900 UTC FRI SEP 18 2020 INTERESTS ALONG THE WESTERN GULF OF MEXICO COAST SHOULD MONITOR THE PROGRESS OF THE DEPRESSION. TROPICAL DEPRESSION CENTER LOCATED NEAR 22.9N 94.1W AT 18/0900Z POSITION ACCURATE WITHIN 45 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 25 DEGREES AT 5 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1005 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 22.9N 94.1W AT 18/0900Z AT 18/0600Z CENTER WAS LOCATED NEAR 22.6N 94.2W FORECAST VALID 18/1800Z 23.7N 93.7W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 80NE 40SE 30SW 30NW. FORECAST VALID 19/0600Z 24.9N 93.2W MAX WIND 45 KT...GUSTS 55 KT. 34 KT...100NE 60SE 40SW 60NW. FORECAST VALID 19/1800Z 25.7N 93.2W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 40SE 0SW 30NW. 34 KT...130NE 70SE 70SW 80NW. FORECAST VALID 20/0600Z 25.9N 93.8W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 40NE 40SE 30SW 30NW. 34 KT...140NE 90SE 80SW 100NW. FORECAST VALID 20/1800Z 26.0N 94.6W MAX WIND 65 KT...GUSTS 80 KT. 50 KT... 40NE 40SE 30SW 40NW. 34 KT...150NE 90SE 80SW 100NW. FORECAST VALID 21/0600Z 26.3N 95.6W MAX WIND 65 KT...GUSTS 80 KT. 50 KT... 50NE 40SE 30SW 50NW. 34 KT...150NE 80SE 80SW 100NW. 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 22/0600Z 26.7N 96.3W MAX WIND 60 KT...GUSTS 75 KT. OUTLOOK VALID 23/0600Z 27.5N 96.0W MAX WIND 55 KT...GUSTS 65 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 22.9N 94.1W NEXT ADVISORY AT 18/1500Z $$ FORECASTER ZELINSKY
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Atlantic Tropical Weather Outlook
2020-09-18 07:27:27| National Hurricane Center (Atlantic)
000 ABNT20 KNHC 180527 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 AM EDT Fri Sep 18 2020 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Hurricane Teddy, located over the central tropical Atlantic, and on Tropical Depression Twenty-Two, located over the southwestern Gulf of Mexico. Showers and thunderstorms associated with an area of low pressure located a few hundred miles southwest of the Cabo Verde Islands have increased during the past several hours. Earlier satellite-derived wind data indicated that this system does not yet have a well-defined center, but it is producing winds near tropical-storm-force to its east. Environmental conditions are expected to be conducive for additional development during the next day or two and a tropical depression or tropical storm could form before the end of the week. This system is forecast move west-northwestward at 10 to 15 mph through the weekend. * Formation chance through 48 hours...medium...60 percent. * Formation chance through 5 days...medium...60 percent. A small low pressure system is embedded within a larger non-tropical low. Although showers and thunderstorms associated with the smaller low are showing signs of organization, the system will soon move inland over Portugal and further tropical or subtropical development is unlikely. The low is producing gale-force winds, and will likely bring gusty winds and brief periods of heavy rain to portions of western Portugal today and tonight. For more information about potential hazards in Portugal, please see products issued by the Portuguese Institute for the Sea and the Atmosphere (IPMA). For more information about marine hazards associated with this system, see High Seas Forecasts issued by Meteo France. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...low...20 percent. Post-tropical cyclone Paulette is located several hundred miles north-northwest of the Azores. The cyclone is forecast to move quickly southward for the next several days and then stall over marginally warm waters a few hundred miles south or south-southwest of the Azores by the end of the weekend. The cyclone could subsequently redevelop tropical characteristics late this weekend or early next week while it moves little. * Formation chance through 48 hours...low...10 percent. * Formation chance through 5 days...low...20 percent. Another tropical wave is forecast to move off the west coast of Africa by early Saturday. Some gradual development of the system will be possible thereafter while it moves generally west-northwestward over the far eastern Atlantic. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...low...20 percent. && Public Advisories on Tropical Depression Twenty-Two are issued under WMO header WTNT32 KNHC and under AWIPS header MIATCPAT2. Forecast/Advisories on Tropical Depression Twenty-Two are issued under WMO header WTNT22 KNHC and under AWIPS header MIATCMAT2. Products issued by the Portuguese Institute for the Sea and the Atmosphere (IPMA) are available on the web at https://www.ipma.pt. High Seas Forecasts issued by Meteo France can be found under WMO header FQNT50 LFPW and available on the web at www.meteofrance.com/previsions-meteo-marine/bulletin/grandlarge/ metarea2 $$ Forecaster Zelinsky
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Eastern North Pacific Tropical Weather Outlook
2020-09-18 07:12:30| National Hurricane Center (East Pacific)
000 ABPZ20 KNHC 180512 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 1100 PM PDT Thu Sep 17 2020 For the eastern North Pacific...east of 140 degrees west longitude: Tropical cyclone formation is not expected during the next 5 days. $$ Forecaster Cangialosi
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Tropical Depression Twenty-two Graphics
2020-09-18 04:44:33| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Fri, 18 Sep 2020 02:44:33 GMT Wind Speed Probabilities last updated Fri, 18 Sep 2020 02:44:33 GMT
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Tropical Depression Twenty-two Forecast Discussion Number 2
2020-09-18 04:43:29| National Hurricane Center (Atlantic)
Issued at 1000 PM CDT Thu Sep 17 2020 000 WTNT42 KNHC 180243 TCDAT2 Tropical Depression Twenty-Two Discussion Number 2 NWS National Hurricane Center Miami FL AL222020 1000 PM CDT Thu Sep 17 2020 Inspection of flight-level wind data from the earlier Air Force Reserve mission indicates that the depression has a somewhat elongated circulation, but a sufficiently well-defined center and pressure minimum were found just to the west of NOAA buoy 42055. The plane measured maximum surface winds of 30 kt in the deep convection to the southwest of the center using the SFMR instrument, and that remains the initial intensity. As best as I can tell, the depression is moving very slowly northeastward with an initial motion of 035/3 kt. A positively tilted mid- to upper-level trough extends across Texas and northern Mexico, and this feature should cause the depression to move toward the north-northeast during the next 36 hours. The trough is expected to dissolve soon after that time, with a mid-tropospheric high building over the south-central United States. The high should force the cyclone to turn and move very slowly westward on days 3 and 4, and then potentially stall or meander off the lower Texas/ northeastern Mexico coast by day 5. There is lower-than-normal confidence in the official track forecast due to fairly significant spread among the track guidance. However, the models do agree on the general scenario, and they all suggest that the depression is unlikely to move a whole lot for the entire forecast period. This new NHC forecast lies very close to the TVCN multi-model consensus. Unfortunately, there is also significant uncertainty in the intensity forecast. Light-to-moderate southerly to southwesterly shear is expected to affect the depression for the next couple of days while it moves over very warm waters of 30-31 degrees Celsius and in a very moist environment. Things change quickly after 48 hours due to a cold front entering the northern Gulf, and the drier, more stable air mass behind the front could be entrained into the cyclone's circulation from day 3 to day 5. The GFS- and ECMWF-based SHIPS models show the most significant strengthening, bringing the intensity to 75-80 kt in about 3 days, while many of the other intensity models don't even raise it to hurricane intensity. As a compromise between these various solutions, the NHC intensity forecast shows the cyclone just reaching the hurricane threshold in 2-3 days and then gradually weakening thereafter due to the less favorable environment. However, it cannot be stressed enough that this forecast is highly uncertain. Key Messages: 1. Tropical Depression Twenty-Two is expected to strengthen to a tropical storm, and possibly a hurricane, while moving slowly over the western Gulf of Mexico during the next few days. 2. While it is too early to determine what areas could see direct wind, storm surge, and rainfall impacts from this system, interests throughout the western Gulf of Mexico should monitor the progress of this system and future updates to the forecast. FORECAST POSITIONS AND MAX WINDS INIT 18/0300Z 22.0N 94.2W 30 KT 35 MPH 12H 18/1200Z 22.9N 93.8W 35 KT 40 MPH 24H 19/0000Z 23.9N 93.3W 45 KT 50 MPH 36H 19/1200Z 24.8N 92.9W 55 KT 65 MPH 48H 20/0000Z 25.4N 93.2W 60 KT 70 MPH 60H 20/1200Z 25.6N 94.0W 65 KT 75 MPH 72H 21/0000Z 25.7N 94.8W 65 KT 75 MPH 96H 22/0000Z 26.1N 95.9W 60 KT 70 MPH 120H 23/0000Z 26.4N 96.0W 55 KT 65 MPH $$ Forecaster Berg
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