Home forecast
 

Keywords :   


Tag: forecast

Tropical Storm Larry Forecast Advisory Number 4

2021-09-01 16:49:08| National Hurricane Center (Atlantic)

Issued at 1500 UTC WED SEP 01 2021 000 WTNT22 KNHC 011448 TCMAT2 TROPICAL STORM LARRY FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL122021 1500 UTC WED SEP 01 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 12.3N 27.6W AT 01/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 19 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1001 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT. 34 KT....... 50NE 50SE 40SW 0NW. 12 FT SEAS.. 50NE 0SE 0SW 0NW. 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 12.3N 27.6W AT 01/1500Z AT 01/1200Z CENTER WAS LOCATED NEAR 12.3N 26.7W FORECAST VALID 02/0000Z 12.4N 30.4W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 60NE 50SE 40SW 60NW. FORECAST VALID 02/1200Z 12.7N 33.4W MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 20NE 0SE 0SW 20NW. 50 KT... 40NE 30SE 20SW 40NW. 34 KT... 80NE 70SE 50SW 80NW. FORECAST VALID 03/0000Z 13.2N 36.5W MAX WIND 75 KT...GUSTS 90 KT. 64 KT... 30NE 20SE 20SW 30NW. 50 KT... 40NE 30SE 30SW 40NW. 34 KT... 90NE 70SE 50SW 90NW. FORECAST VALID 03/1200Z 13.9N 39.2W MAX WIND 90 KT...GUSTS 110 KT. 64 KT... 30NE 20SE 20SW 30NW. 50 KT... 50NE 40SE 30SW 50NW. 34 KT...110NE 90SE 70SW 110NW. FORECAST VALID 04/0000Z 15.0N 41.9W MAX WIND 100 KT...GUSTS 120 KT. 50 KT... 70NE 50SE 40SW 70NW. 34 KT...130NE 100SE 80SW 130NW. FORECAST VALID 04/1200Z 16.2N 44.6W MAX WIND 105 KT...GUSTS 130 KT. 50 KT... 80NE 70SE 50SW 70NW. 34 KT...150NE 130SE 90SW 140NW. 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 05/1200Z 19.0N 49.5W MAX WIND 105 KT...GUSTS 130 KT. OUTLOOK VALID 06/1200Z 22.0N 52.5W MAX WIND 105 KT...GUSTS 130 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 12.3N 27.6W NEXT ADVISORY AT 01/2100Z $$ FORECASTER BEVEN

Tags: number storm larry advisory

 

Tropical Storm Larry Forecast Discussion Number 3

2021-09-01 10:59:00| National Hurricane Center (Atlantic)

Issued at 800 AM CVT Wed Sep 01 2021 000 WTNT42 KNHC 010858 TCDAT2 Tropical Storm Larry Discussion Number 3 NWS National Hurricane Center Miami FL AL122021 800 AM CVT Wed Sep 01 2021 Deep convection with cloud tops colder than -80C have increased over and to the west of the low-level center since the previous advisory. Subjective satellite intensity estimates at 0600 UTC from TAFB and SAB were T2.5/35 kt and T3.0/45 kt, while the most recent objective intensity estimates from UW-CIMSS are T2.8/41 kt from ADT and 37 kt from SATCON. An average of these intensity estimates support increasing the advisory intensity to 40 kt, making the cyclone Tropical Storm Larry. In addition, 0300 UTC and 0700 UTC observations from ship VRNF3, which recently passed through the center of Larry, reported a pressure of 1006.8 mb and winds near 25 kt. These data were the basis for the estimated central pressure of 1003 mb, a pressure value that also supports an intensity of 40 kt. Larry has turned more westward over the past several hours, and the new motion estimate is 280/17 kt. Larry is expected to move around the southern and southwestern periphery of the sprawling Bermuda-Azores ridge for the next 5 days, resulting in a general west motion for the next 36 hours or so, followed by a turn toward the west-northwest on Friday, and a northwestward motion over the weekend and continuing into early next week. There has been a pronounced westward shift in the track guidance for this cycle, with the greatest shift coming from the GFS model. Over the past 36 hours, the GFS has shifted its track westward by more than 500 nmi, and even the latest shift still keeps the GFS model the easternmost track forecast in the guidance suite. In contrast, the ECMWF and UKMET models, which lie along the westernmost portion of the guidance envelope, have been fairly stable. Owing to the westward shift in the overall guidance envelope, and considering the GFS solution as an outlier model, the new NHC forecast track has also been shifted westward, and lies between the NOAA-HCCA corrected-consensus model to the south, and the tightly packed TVCA simple-consensus model and FSSE corrected-consensus model to the north. Given the poor handling of the ridge to the north of Larry by the GFS, subsequent NHC forecast tracks may have to be shifted farther west. Given the improved inner-core wind field based on earlier ASCAT wind data and reports from ship VRNF3, along with warm sea-surface temperatures of 28 deg C and light easterly to southeasterly vertical shear of around 5 kt, steady strengthening is expected for the next 24 hours or so. By 36 hours when Larry is expected to be a hurricane and have a well-established and tighter inner-core wind field and possibly an eye, rapid intensification is forecast, with Larry becoming a major hurricane by 72 hour. This in large part due to the massive equatorward upper-level outflow pattern that all of the global and regional models are forecasting, which is the same type of outflow pattern that recently occurred with Hurricane Ida. The new official intensity forecast is above the previous advisory forecast by about 10 kt at all forecast times, and conservatively follows an average of the Decay-SHIPS, COAMPS-TC, FSSE, and ECMWF models. This intensity forecast is near the upper end of the guidance envelope and is above the other consensus intensity models. FORECAST POSITIONS AND MAX WINDS INIT 01/0900Z 12.3N 24.8W 40 KT 45 MPH 12H 01/1800Z 12.5N 27.5W 50 KT 60 MPH 24H 02/0600Z 12.6N 30.6W 60 KT 70 MPH 36H 02/1800Z 13.1N 33.7W 70 KT 80 MPH 48H 03/0600Z 13.6N 36.8W 85 KT 100 MPH 60H 03/1800Z 14.4N 39.7W 95 KT 110 MPH 72H 04/0600Z 15.5N 42.0W 100 KT 115 MPH 96H 05/0600Z 18.2N 46.9W 105 KT 120 MPH 120H 06/0600Z 21.3N 50.6W 105 KT 120 MPH $$ Forecaster Stewart

Tags: number discussion storm larry

 
 

Tropical Storm Larry Forecast Advisory Number 3

2021-09-01 10:43:00| National Hurricane Center (Atlantic)

Issued at 0900 UTC WED SEP 01 2021 000 WTNT22 KNHC 010842 TCMAT2 TROPICAL STORM LARRY FORECAST/ADVISORY NUMBER 3 NWS NATIONAL HURRICANE CENTER MIAMI FL AL122021 0900 UTC WED SEP 01 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 12.3N 24.8W AT 01/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 17 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1003 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 0NE 0SE 50SW 50NW. 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 12.3N 24.8W AT 01/0900Z AT 01/0600Z CENTER WAS LOCATED NEAR 12.2N 23.9W FORECAST VALID 01/1800Z 12.5N 27.5W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 50NE 40SE 40SW 50NW. FORECAST VALID 02/0600Z 12.6N 30.6W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 20SE 0SW 0NW. 34 KT... 70NE 60SE 40SW 70NW. FORECAST VALID 02/1800Z 13.1N 33.7W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 20NE 0SE 0SW 20NW. 50 KT... 40NE 30SE 20SW 40NW. 34 KT... 80NE 70SE 50SW 80NW. FORECAST VALID 03/0600Z 13.6N 36.8W MAX WIND 85 KT...GUSTS 105 KT. 64 KT... 30NE 20SE 20SW 30NW. 50 KT... 50NE 40SE 30SW 50NW. 34 KT...100NE 70SE 50SW 100NW. FORECAST VALID 03/1800Z 14.4N 39.7W MAX WIND 95 KT...GUSTS 115 KT. 50 KT... 70NE 50SE 40SW 70NW. 34 KT...130NE 100SE 80SW 130NW. FORECAST VALID 04/0600Z 15.5N 42.0W MAX WIND 100 KT...GUSTS 120 KT. 50 KT... 80NE 70SE 50SW 70NW. 34 KT...150NE 130SE 90SW 140NW. 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 05/0600Z 18.2N 46.9W MAX WIND 105 KT...GUSTS 130 KT. OUTLOOK VALID 06/0600Z 21.3N 50.6W MAX WIND 105 KT...GUSTS 130 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 12.3N 24.8W NEXT ADVISORY AT 01/1500Z $$ FORECASTER STEWART

Tags: number storm larry advisory

 

Tropical Depression Kate Forecast Discussion Number 17

2021-09-01 10:33:59| National Hurricane Center (Atlantic)

Issued at 500 AM AST Wed Sep 01 2021 000 WTNT45 KNHC 010833 TCDAT5 Tropical Depression Kate Discussion Number 17 NWS National Hurricane Center Miami FL AL102021 500 AM AST Wed Sep 01 2021 After the earlier convective hiatus, a concentrated area of thunderstorm activity containing numerous lightning strikes has developed over and to the east of the low-level center. In addition, upper-level outflow has been expanding to the west, an indication that the hostile shear conditions that have been plaguing the cyclone the past few days has finally waned. ASCAT data around 0000-0100Z showed peak winds near 25 kt; however, the recent sharp increase in deep convection along with a consensus Dvorak subjective intensity of T2.0/30 kt supports increasing the intensity to 30 kt. The 30-kt advisory intensity is also supported by UW-CIMSS objective intensity estimates of T2.1/31 kt from ADT and 39 kt from SATCON. The initial motion estimate is 340/08 kt. Kate is moving north-northwestward between a small mid- to upper-level low to the south of the cyclone and deep-layer ridge located to the north and east of the system. A gradual turn toward the northwest is expected later today, followed by a turn back toward the north on Thursday as Kate rounds the western periphery of the ridge. By Friday, recurvature toward the north-northeast and northeast into the mid-latitude westerlies is forecast when the cyclone will be lifted out by an eastward-moving deep-layer trough currently crossing the western Atlantic. The new NHC track forecast is similar to but a little to the left of the previous advisory track, and closely follows the tightly packed consensus track forecast models TVCA and NOAA-HCCA. A 0505 UTC AMSR-2 microwave pass revealed that Kate's compact circulation had tightened up considerably since the earlier 0100 UTC ASCAT wind data, which shows a broad and elongated inner-core wind field. Also, Kate is currently passing between two small upper-level lows to the north and south of the cyclone, which is aiding the upper-level divergence across the system, albeit somewhat constrained due to the short distance of only about 300 nmi between the two upper lows. Given the locally enhanced outflow and the recent increase in deep convection, it s not out of the question that Kate could restrengthen back into a low-end tropical storm during the next 24 hours or so. However, the entrainment of dry mid-level air with humidity values less than 50 percent should prevent any significant or rapid restrengthening from occuring. by 48 hours, moderate northerly shear and even drier mid-level air should cause convection weaken, resulting in a gradual spin down of the circulation and eventual dissipation by 72 hours. The new NHC intensity forecast is similar to but slightly lower than the consensus intensity models IVCN and HCCA, and the Decay-SHIPS statistical-dynamical intensity model. FORECAST POSITIONS AND MAX WINDS INIT 01/0900Z 25.7N 51.7W 30 KT 35 MPH 12H 01/1800Z 26.9N 52.5W 30 KT 35 MPH 24H 02/0600Z 28.5N 53.2W 30 KT 35 MPH 36H 02/1800Z 30.3N 53.7W 25 KT 30 MPH 48H 03/0600Z 31.9N 53.5W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 03/1800Z 33.5N 53.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 72H 04/0600Z...DISSIPATED $$ Forecaster Stewart

Tags: number discussion kate tropical

 

Tropical Depression Kate Forecast Advisory Number 17

2021-09-01 10:33:02| National Hurricane Center (Atlantic)

Issued at 0900 UTC WED SEP 01 2021 000 WTNT25 KNHC 010832 TCMAT5 TROPICAL DEPRESSION KATE FORECAST/ADVISORY NUMBER 17 NWS NATIONAL HURRICANE CENTER MIAMI FL AL102021 0900 UTC WED SEP 01 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 25.7N 51.7W AT 01/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT 8 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1007 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 25.7N 51.7W AT 01/0900Z AT 01/0600Z CENTER WAS LOCATED NEAR 25.3N 51.5W FORECAST VALID 01/1800Z 26.9N 52.5W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 02/0600Z 28.5N 53.2W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 02/1800Z 30.3N 53.7W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 03/0600Z 31.9N 53.5W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 03/1800Z 33.5N 53.1W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 04/0600Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 25.7N 51.7W NEXT ADVISORY AT 01/1500Z $$ FORECASTER STEWART

Tags: number advisory kate tropical

 

Sites : [71] [72] [73] [74] [75] [76] [77] [78] [79] [80] [81] [82] [83] [84] [85] [86] [87] [88] [89] [90] next »