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Tropical Storm Karen Public Advisory Number 14

2019-09-25 16:50:52| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Wed Sep 25 2019 000 WTNT32 KNHC 251450 TCPAT2 BULLETIN Tropical Storm Karen Advisory Number 14 NWS National Hurricane Center Miami FL AL122019 1100 AM AST Wed Sep 25 2019 ...CENTER OF KAREN MOVING NORTHWARD OVER THE SOUTHWESTERN ATLANTIC... ...HEAVY RAINS CONTINUE OVER PUERTO RICO, THE VIRGIN ISLANDS, AND PORTIONS OF THE NORTHERN LEEWARD ISLANDS... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...21.7N 64.9W ABOUT 240 MI...385 KM NNE OF SAN JUAN PUERTO RICO MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Tropical Storm Karen was located near latitude 21.7 North, longitude 64.9 West. Karen is moving toward the north near 15 mph (24 km/h). A north- northeastward to northeastward motion with a decrease in forward speed is expected through early Friday. Karen is then expected to slow down and make a clockwise loop over the southwestern Atlantic into the weekend. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Some strengthening is forecast during the next couple of days. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 1003 mb (29.62 inches). HAZARDS AFFECTING LAND ---------------------- Rainfall: Karen is expected to produce additional rainfall accumulations of 1 to 2 inches across Puerto Rico and the Virgin Islands, with isolated storm totals of 8 inches. These rains may cause flash flooding and mudslides, especially in mountainous areas. Some areas in southeastern Puerto Rico have already received up to 5 inches of rainfall, which has caused some flooding. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Berg

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Tropical Storm Karen Wind Speed Probabilities Number 14

2019-09-25 16:50:52| National Hurricane Center (Atlantic)

Issued at 1500 UTC WED SEP 25 2019 000 FONT12 KNHC 251450 PWSAT2 TROPICAL STORM KAREN WIND SPEED PROBABILITIES NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL AL122019 1500 UTC WED SEP 25 2019 AT 1500Z THE CENTER OF TROPICAL STORM KAREN WAS LOCATED NEAR LATITUDE 21.7 NORTH...LONGITUDE 64.9 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 40 KTS...45 MPH...75 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 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 12Z WED 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 12Z WED 00Z THU 12Z THU 00Z FRI 12Z FRI 12Z SAT 12Z SUN PERIODS TO TO TO TO TO TO TO 00Z THU 12Z THU 00Z FRI 12Z FRI 12Z SAT 12Z SUN 12Z MON FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT BERMUDA 34 X X( X) X( X) X( X) 2( 2) 1( 3) 1( 4) SAN SALVADOR 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) MAYAGUANA 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) GRAND TURK 34 X X( X) X( X) X( X) X( X) X( X) 4( 4) $$ FORECASTER BERG

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Tropical Storm Karen Forecast Discussion Number 14

2019-09-25 16:50:52| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Wed Sep 25 2019 000 WTNT42 KNHC 251450 TCDAT2 Tropical Storm Karen Discussion Number 14 NWS National Hurricane Center Miami FL AL122019 1100 AM AST Wed Sep 25 2019 Karen is still having a tough time establishing and maintaining a well-organized structure. The deep convection which developed over the center earlier this morning has since collapsed, leaving a ragged and disorganized cloud pattern. In addition, a sizable outflow boundary moving away from the eastern part of the circulation suggests that there is dry air within the vortex. The initial intensity is being held at 40 kt, pending possible scatterometer data later this morning and a reconnaissance flight this afternoon. The initial position is a little difficult to locate, but the best estimate of the current motion is 360/13 kt. Karen is moving northward between a mid-level high centered over the central Atlantic and a mid- to upper-level low located just east of the Bahamas. This low is expected to slowly retrograde westward, with ridging developing over the western Atlantic by day 3. This change in steering will cause Karen to turn northeastward during the next 48 hours but then make a clockwise loop once it is blocked by the ridge. After day 3, the ridge should force Karen to move west-southwestward. Most of the track models agree on this general scenario. There is some latitudinal spread on days 4 and 5 after the loop occurs, with the HWRF being the most notable outlier by not showing much of a westward motion. The consensus aids, however, have remained fairly steady, and therefore there was no compelling reason to make any significant changes compared to the previous track forecast. Except for the possibility of dry air in the circulation, it's not quite evident why Karen has not been able to sustain organization. Still, the cyclone is expected to move beneath an upper-level anticyclone during the next 24-48 hours, and if the shear does indeed decrease, then some strengthening would be expected. There continues to be a dichotomy among the intensity models, with the dynamical models (including the GFS and ECMWF) keeping the cyclone weak while the statistical-dynamical models still show intensification through days 4 and 5. It's difficult to ignore what's being shown by the global models, since there must be something in the environment that they're deeming to be negative for continued strengthening. The best course of action at this point is to maintain a steady intensity after 48 hours, but it should be noted that what is shown in the official forecast still lies above the ICON intensity consensus and the HCCA corrected consensus aid. Key Messages: 1. Karen will continue to produce heavy rainfall, potentially causing additional flash floods and mudslides, across Puerto Rico and the Virgin Islands today even as the center moves away from the region. FORECAST POSITIONS AND MAX WINDS INIT 25/1500Z 21.7N 64.9W 40 KT 45 MPH 12H 26/0000Z 23.4N 64.4W 45 KT 50 MPH 24H 26/1200Z 25.4N 63.7W 45 KT 50 MPH 36H 27/0000Z 26.9N 62.9W 50 KT 60 MPH 48H 27/1200Z 27.5N 62.0W 55 KT 65 MPH 72H 28/1200Z 26.8N 62.0W 55 KT 65 MPH 96H 29/1200Z 26.0N 65.0W 55 KT 65 MPH 120H 30/1200Z 25.5N 68.5W 55 KT 65 MPH $$ Forecaster Berg

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Tropical Storm Karen Forecast Advisory Number 14

2019-09-25 16:50:21| National Hurricane Center (Atlantic)

Issued at 1500 UTC WED SEP 25 2019 663 WTNT22 KNHC 251450 TCMAT2 TROPICAL STORM KAREN FORECAST/ADVISORY NUMBER 14 NWS NATIONAL HURRICANE CENTER MIAMI FL AL122019 1500 UTC WED SEP 25 2019 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 21.7N 64.9W AT 25/1500Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTH OR 360 DEGREES AT 13 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1003 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 20NE 60SE 20SW 0NW. 12 FT SEAS.. 30NE 75SE 30SW 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 21.7N 64.9W AT 25/1500Z AT 25/1200Z CENTER WAS LOCATED NEAR 21.1N 65.0W FORECAST VALID 26/0000Z 23.4N 64.4W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 40NE 60SE 30SW 0NW. FORECAST VALID 26/1200Z 25.4N 63.7W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 60NE 60SE 40SW 20NW. FORECAST VALID 27/0000Z 26.9N 62.9W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 20SE 0SW 0NW. 34 KT... 60NE 60SE 40SW 30NW. FORECAST VALID 27/1200Z 27.5N 62.0W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 20NE 20SE 0SW 0NW. 34 KT... 60NE 70SE 40SW 30NW. FORECAST VALID 28/1200Z 26.8N 62.0W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 20NE 20SE 20SW 20NW. 34 KT... 70NE 70SE 60SW 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 29/1200Z 26.0N 65.0W MAX WIND 55 KT...GUSTS 65 KT. OUTLOOK VALID 30/1200Z 25.5N 68.5W MAX WIND 55 KT...GUSTS 65 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.7N 64.9W NEXT ADVISORY AT 25/2100Z $$ FORECASTER BERG

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