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Tropical Depression Peter Forecast Discussion Number 16
2021-09-22 16:53:34| National Hurricane Center (Atlantic)
Issued at 1100 AM AST Wed Sep 22 2021 000 WTNT41 KNHC 221453 TCDAT1 Tropical Depression Peter Discussion Number 16 NWS National Hurricane Center Miami FL AL162021 1100 AM AST Wed Sep 22 2021 Peter is barely hanging on to its status as a tropical cyclone this morning. While still closed, the low-level circulation continues to look increasingly diffuse on satellite imagery. In addition, the convective activity, which lacks much organization, remains displaced well to the northeast by moderate to strong southwesterly vertical wind shear. A blend of the latest subjective satellite intensity estimates support keeping Peter as a 30-kt tropical depression this advisory. As has been the story for the last few days, Peter will continue to deal with a lethal combo of 25-35 kt southwesterly vertical wind shear while embedded in a relatively dry mid-level air environment. These factors should ultimately lead to Peter's demise as a tropical cyclone, with the latest NHC intensity forecast moving the timing up for post-tropical remnant low status to 24 hours. This degeneration could occur as soon as this afternoon if more organized convection does not soon return near the center. Alternatively, Peter may also open up into a trough at any time since the center continues to gradually lose definition. Similar to prior nights, Peter made another jog to the left after overnight convection diminished near the center. More recently, the depression has begun a slow north-northwestward motion estimated at 330/6 kt. The cyclone is expected to turn northward and then northeastward over the next 24 hours as low-level ridging breaks down south of a deep-layer trough located near Bermuda. The NHC track forecast early on is a bit west of the previous one due to the leftward initial position, but falls in line to a similar track after 24 hours, continuing to split the difference between the GFS and ECMWF models. As Peter moves poleward away from Puerto Rico, Hispaniola, and the Virgin Islands, the threat of heavy rainfall for these regions associated with the system has diminished. FORECAST POSITIONS AND MAX WINDS INIT 22/1500Z 21.6N 66.9W 30 KT 35 MPH 12H 23/0000Z 22.3N 67.2W 30 KT 35 MPH 24H 23/1200Z 23.3N 67.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 24/0000Z 24.2N 66.7W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 24/1200Z 25.1N 66.3W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 25/0000Z 26.3N 65.6W 25 KT 30 MPH...POST-TROP/REMNT LOW 72H 25/1200Z...DISSIPATED $$ Forecaster Papin
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Tropical Depression Peter Graphics
2021-09-22 16:45:08| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Wed, 22 Sep 2021 14:45:08 GMT Wind Speed Probabilities last updated Wed, 22 Sep 2021 14:45:08 GMT
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Summary for Tropical Depression Rose (AT2/AL172021)
2021-09-22 16:45:05| National Hurricane Center (Atlantic)
...ROSE REMAINS DISORGANIZED WHILE MOVING NORTHWESTWARD OVER THE EASTERN ATLANTIC... As of 11:00 AM AST Wed Sep 22 the center of Rose was located near 23.6, -39.2 with movement NW at 9 mph. The minimum central pressure was 1009 mb with maximum sustained winds of about 35 mph.
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Tropical Depression Rose Public Advisory Number 14
2021-09-22 16:45:05| National Hurricane Center (Atlantic)
Issued at 1100 AM AST Wed Sep 22 2021 000 WTNT32 KNHC 221444 TCPAT2 BULLETIN Tropical Depression Rose Advisory Number 14 NWS National Hurricane Center Miami FL AL172021 1100 AM AST Wed Sep 22 2021 ...ROSE REMAINS DISORGANIZED WHILE MOVING NORTHWESTWARD OVER THE EASTERN ATLANTIC... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...23.6N 39.2W ABOUT 1115 MI...1800 KM WNW OF THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...NW OR 305 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Tropical Depression Rose was located near latitude 23.6 North, longitude 39.2 West. The depression is moving toward the northwest near 9 mph (15 km/h) and this general motion should continue through tonight. A turn toward the north is expected on Thursday, followed by a northeastward motion by Friday. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Little overall change in intensity is expected during the next couple of days, however, Rose is forecast to degenerate into a remnant low by Friday night or Saturday. The estimated minimum central pressure is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Beven
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Summary for Tropical Depression Peter (AT1/AL162021)
2021-09-22 16:43:04| National Hurricane Center (Atlantic)
...PETER BARELY HANGING ON AS A TROPICAL CYCLONE... As of 11:00 AM AST Wed Sep 22 the center of Peter was located near 21.6, -66.9 with movement NNW at 7 mph. The minimum central pressure was 1008 mb with maximum sustained winds of about 35 mph.
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