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Tropical Depression Eleven Forecast Discussion Number 7
2020-08-13 10:39:15| National Hurricane Center (Atlantic)
Issued at 500 AM AST Thu Aug 13 2020 000 WTNT41 KNHC 130839 TCDAT1 Tropical Depression Eleven Discussion Number 7 NWS National Hurricane Center Miami FL AL112020 500 AM AST Thu Aug 13 2020 Proxy-visible GOES-16 satellite imagery and data from an earlier scatterometer pass indicated that the low-level center of the depression is displaced to the south of the main area of deep convection. Recently, however, some new convection is forming closer to the estimated center which suggests some re-organization of the system may be taking place. Dvorak T-numbers from TAFB and SAB are only 1.0, but the current intensity estimates from these agencies still support 30 kt. Since the shear is not expected to increase significantly for the next day or so, strengthening is still forecast in the short term. Beginning around 2-3 days, southwesterly shear associated with a large upper-level trough over the western Atlantic should cause the cyclone to weaken. The official intensity forecast remains close to the model consensus. The latest center fixes show that the cyclone is moving west-northwestward, or around 285/13 kt. There has been little change to the track forecast or reasoning from the previous advisory. The system should continue to move west-northwestward on the south side of the subtropical ridge into the weekend. By day 3 a turn toward the northwest is likely in response to weakness in the ridge followed by a turn toward the north-northwest as the cyclone moves through this weakness late in the period. The official track forecast is close to the latest NOAA corrected model consensus, or HCCA, prediction and not much different from the previous official forecast. FORECAST POSITIONS AND MAX WINDS INIT 13/0900Z 12.9N 47.9W 30 KT 35 MPH 12H 13/1800Z 13.8N 49.7W 35 KT 40 MPH 24H 14/0600Z 14.9N 52.2W 40 KT 45 MPH 36H 14/1800Z 16.2N 55.0W 45 KT 50 MPH 48H 15/0600Z 17.6N 57.7W 45 KT 50 MPH 60H 15/1800Z 18.8N 60.2W 45 KT 50 MPH 72H 16/0600Z 20.3N 62.5W 40 KT 45 MPH 96H 17/0600Z 23.0N 66.5W 35 KT 40 MPH 120H 18/0600Z 26.0N 68.5W 30 KT 35 MPH $$ Forecaster Pasch
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Tropical Depression Ten-E Forecast Discussion Number 1
2020-08-13 10:39:15| National Hurricane Center (East Pacific)
Issued at 200 AM PDT Thu Aug 13 2020 000 WTPZ45 KNHC 130839 TCDEP5 Tropical Depression Ten-E Discussion Number 1 NWS National Hurricane Center Miami FL EP102020 200 AM PDT Thu Aug 13 2020 Satellite images over the past several hours have shown a gradual increase in the organized deep convection associated with an area of low pressure located about 1400 miles west-southwest of the southern tip of the Baja California peninsula. In addition, a recent ASCAT overpass revealed that the low level circulation has become well-defined. Based on these data, advisories have been initiated on Tropical Depression Ten-E. The ASCAT wind data indicated 25-30 kt peak winds. This along with Dvorak satellite intensity estimates from TAFB and SAB support an initial advisory intensity of 30 kt. It should be noted that the ASCAT data showed that there were a few 35 kt wind vectors about 45 n mi west of the center of the system and these are presumed to be rain-contaminated. The depression is expected to be in a marginally conducive environment for strengthening throughout the 5-day forecast period. Although the system is forecast to remain over sufficiently warm waters, SHIPS guidance suggests that moderate northeasterly vertical wind shear will prevail over the system for the next several days. Late in the forecast period, the cyclone may encounter some drier air which would also inhibit strengthening. The official forecast shows only slight strengthening in the next 24 h, and no change in intensity thereafter. This is in good agreement with most of the intensity guidance. The cyclone's motion is 285/06 kt. A weak mid-level ridge to the north of the depression is expected to steer the system slowly westward over the next few days and the track model guidance is in decent agreement through that time. By 72 h, the steering flow appears to collapse, and as a result the depression is forecast to move very slowly during the 3-5 day period. Once the steering flow becomes weak the models diverge a bit with some moving the cyclone northwestward, while others move it west-southwestward. Regardless of this spread, the majority of the models agree that the cyclone will move very little during that time. The official forecast track splits the difference in the model solutions beyond day 3, and closely follows the TVCE and TVCX consensus aids throughout the 5-day forecast period. FORECAST POSITIONS AND MAX WINDS INIT 13/0900Z 13.5N 129.1W 30 KT 35 MPH 12H 13/1800Z 13.8N 130.2W 30 KT 35 MPH 24H 14/0600Z 13.9N 131.5W 35 KT 40 MPH 36H 14/1800Z 13.9N 132.5W 35 KT 40 MPH 48H 15/0600Z 13.8N 133.5W 35 KT 40 MPH 60H 15/1800Z 13.7N 134.1W 35 KT 40 MPH 72H 16/0600Z 13.8N 134.5W 35 KT 40 MPH 96H 17/0600Z 14.2N 135.1W 35 KT 40 MPH 120H 18/0600Z 14.6N 135.8W 35 KT 40 MPH $$ Forecaster Latto
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Tropical Depression Ten-E Wind Speed Probabilities Number 1
2020-08-13 10:39:15| National Hurricane Center (East Pacific)
Issued at 0900 UTC THU AUG 13 2020 000 FOPZ15 KNHC 130839 PWSEP5 TROPICAL DEPRESSION TEN-E WIND SPEED PROBABILITIES NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102020 0900 UTC THU AUG 13 2020 AT 0900Z THE CENTER OF TROPICAL DEPRESSION TEN-E WAS LOCATED NEAR LATITUDE 13.5 NORTH...LONGITUDE 129.1 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 30 KTS...35 MPH...55 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 06Z THU AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 06Z THU 18Z THU 06Z FRI 18Z FRI 06Z SAT 06Z SUN 06Z MON PERIODS TO TO TO TO TO TO TO 18Z THU 06Z FRI 18Z FRI 06Z SAT 06Z SUN 06Z MON 06Z TUE FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT 15N 130W 34 4 2( 6) 1( 7) 1( 8) X( 8) X( 8) X( 8) 10N 135W 34 X X( X) X( X) 1( 1) 2( 3) 1( 4) 1( 5) 15N 135W 34 X 1( 1) 1( 2) 6( 8) 7(15) 4(19) 2(21) 15N 135W 50 X X( X) X( X) 1( 1) 1( 2) 1( 3) X( 3) $$ FORECASTER LATTO
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Summary for Tropical Depression Eleven (AT1/AL112020)
2020-08-13 10:38:44| National Hurricane Center (Atlantic)
...DEPRESSION IS DISORGANIZED AT THIS TIME BUT STILL EXPECTED TO STRENGTHEN INTO A TROPICAL STORM... As of 5:00 AM AST Thu Aug 13 the center of Eleven was located near 12.9, -47.9 with movement WNW at 15 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.
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Summary for Tropical Depression Ten-E (EP5/EP102020)
2020-08-13 10:38:44| National Hurricane Center (East Pacific)
...NEW TROPICAL DEPRESSION FORMS OVER THE OPEN EASTERN PACIFIC... As of 2:00 AM PDT Thu Aug 13 the center of Ten-E was located near 13.5, -129.1 with movement WNW at 7 mph. The minimum central pressure was 1004 mb with maximum sustained winds of about 35 mph.
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