Situation Map
Legend
SystemTimePositionMovement (kts)Winds (kts)Pressure (mb)Category
MEGI261800Z22.3N 124.3EWNW 111009473
ROSLYN262100Z16.8N 118.8WNE 03451000
19E262100Z11.6N 140.4WWNW 04301005
97L261200Z9.3N 46.0WWNW 20251010
Typhoon MEGI Tropical Storm ROSLYN Tropical Depression 19E Investigation 97L Situation Map

What is a Hurricane?

A hurricane (or typhoon, or severe tropical cyclone), the strongest storm on Earth, is a cyclonic (rotary) storm that derives its energy from cloud formation and rainfall, unlike frontal cyclones that derive their power from a temperature gradient. Full Article

Saffir-Simpson Scale

Category 1 – 74-95 mph (64-82 knots; 119-153 km/hr). Damage is limited to foliage, signage, unanchored boats and mobile homes. There is no significant damage to buildings. The main threat to life and property may be flooding from heavy rains.

Category 2 – 96-110 mph (83-95 knots; 154-177 km/hr). Roof damage to buildings. Doors and windows damaged. Mobile homes severely damaged. Piers damaged by storm surge. Some trees blown down, more extensive limb damage. Full Article

Tropical Cyclone Formation

Tropical Cyclone Genesis is the technical term for the process of storm formation that leads ultimately to what are called hurricanes, typhoons, or tropical cyclones in various parts of the world.

This occurs when, in the Northern Hemisphere, the Intertropical Convergence Zone, or ITCZ, shifts northward out of the doldrums and atmospheric conditions become favorable for tropical cyclone formation after about the middle of May. Full Article

Global Tropics Hazards and Benefits Outlook
Graphic provided by Climate Prediction Center
Typhoon MEGI Forecast Graphic
Typhoon MEGI Forecast Track (Joint Typhoon Warning Center)
Typhoon MEGI Storm-Centered Infrared
Typhoon MEGI Storm-Centered Enhanced Infrared
Typhoon MEGI Storm-Centered Visible
Typhoon MEGI Warning Text (JTWC)
WTPN31 PGTW 270300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TYPHOON 20W (MEGI) WARNING NR 017    
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   270000Z --- NEAR 23.1N 123.2E
     MOVEMENT PAST SIX HOURS - 310 DEGREES AT 13 KTS
     POSITION ACCURATE TO WITHIN 015 NM
     POSITION BASED ON EYE FIXED BY A COMBINATION OF 
     SATELLITE AND RADAR
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 045 NM NORTHEAST QUADRANT
                            035 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            035 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 120 NM NORTHEAST QUADRANT
                            110 NM SOUTHEAST QUADRANT
                            075 NM SOUTHWEST QUADRANT
                            100 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 250 NM NORTHEAST QUADRANT
                            250 NM SOUTHEAST QUADRANT
                            170 NM SOUTHWEST QUADRANT
                            215 NM NORTHWEST QUADRANT
   REPEAT POSIT: 23.1N 123.2E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   271200Z --- 23.9N 120.9E
   MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   VECTOR TO 24 HR POSIT: 290 DEG/ 11 KTS
    ---
   24 HRS, VALID AT:
   280000Z --- 24.7N 118.6E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   VECTOR TO 36 HR POSIT: 280 DEG/ 08 KTS
    ---
   36 HRS, VALID AT:
   281200Z --- 24.9N 116.9E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   VECTOR TO 48 HR POSIT: 270 DEG/ 06 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   290000Z --- 24.9N 115.6E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
270300Z POSITION NEAR 23.3N 122.6E.
TYPHOON 20W (MEGI), LOCATED APPROXIMATELY 152 NM SOUTHEAST OF TAIPEI,
TAIWAN, HAS TRACKED NORTHWESTWARD AT 13 KNOTS OVER THE PAST SIX
HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 270000Z IS 36 FEET. NEXT
WARNINGS AT 270900Z, 271500Z, 272100Z AND 280300Z.//
NNNN
Typhoon MEGI Prognostic Reasoning (JTWC)
WDPN31 PGTW 270300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/PROGNOSTIC REASONING FOR TYPHOON 20W (MEGI) WARNING NR 17//
RMKS/
1. FOR METEOROLOGISTS.
2. 6 HOUR SUMMARY AND ANALYSIS.
   TYPHOON (TY) 20W (MEGI), LOCATED APPROXIMATELY 152 NM SOUTHEAST OF
TAIPEI, TAIWAN, HAS TRACKED NORTHWESTWARD AT 13 KNOTS OVER THE PAST
SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) SHOWS A
35-NM RAGGED EYE WITH TIGHTLY-CURVED BANDING WRAPPING INTO THE
LOW-LEVEL CIRCULATION CENTER (LLCC). THE INITIAL POSITION IS BASED ON
THE EYE IN THE MSI LOOP WHICH LINES UP WELL WITH A LOW REFLECTIVITY
MICROWAVE EYE FEATURE IN THE 262231Z 36GHZ GPM PASS. THE INITIAL
INTENSITY IS ASSESSED AT 100 KNOTS AND IS BASED ON DVORAK CURRENT
INTENSITY ESTIMATES OF T5.5 FROM ALL AGENCIES. UPPER-LEVEL ANALYSIS
INDICATES EXCELLENT RADIAL OUTFLOW WITH ENHANCED POLEWARD OUTFLOW
INTO A MIDLATITUDE SHORTWAVE TROUGH TO THE NORTH. HOWEVER, MOST
RECENT WATER VAPOR SATELLITE IMAGERY INDICATES SUBSIDENCE ALONG THE
NORTHWEST QUADRANT, INDICATING THE SYSTEM IS APPROACHING AN AREA OF
INCREASING VERTICAL WIND SHEAR (VWS). TY MEGI IS TRACKING
WEST-NORTHWESTWARD ALONG THE PERIPHERY OF A DEEP-LAYERED SUBTROPICAL
RIDGE (STR) POSITIONED TO THE NORTHEAST.
3. FORECAST REASONING.
   A. NO CHANGE TO THE FORECAST PHILOSOPHY SINCE THE PREVIOUS
PROGNOSTIC REASONING BULLETIN. 
   B. TY 20W IS FORECAST TO CONTINUE TRACKING WEST-NORTHWESTWARD,
DRAG THROUGH CENTRAL TAIWAN SHORTLY AFTER TAU 06, THEN CROSS THE
TAIWAN STRAIT BEFORE MAKING A FINAL LANDFALL IN EASTERN CHINA JUST
BEFORE TAU 24. AFTERWARDS, A SECONDARY STR OVER NORTHEASTERN CHINA
WILL ASSUME STEERING AND CAUSE THE CYCLONE TO TRACK ON A FLATTER
WESTWARD TRAJECTORY. A GRADUAL WEAKENING IS EXPECTED OVER THE NEXT FEW
HOURS AS INCREASED VERTICAL WIND SHEAR (VWS) ASSOCIATED WITH THE
LEADING EDGE OF THE SECONDARY STR IMPACTS THE SYSTEM. AFTER LANDFALL
INTO TAIWAN, RAPID WEAKENING IS EXPECTED AS LAND INTERACTION,
COMBINED WITH INCREASING VWS, ERODES THE SYSTEM. TY MEGI WILL
EVENTUALLY DISSIPATE INLAND NORTH OF HONG-KONG BY TAU 48. THE DYNAMIC
GUIDANCE REMAINS IN TIGHT AGREEMENT WITH SOME SPREADING AFTER
LANDFALL IN CHINA. OVERALL, THERE IS HIGH CONFIDENCE IN THE JTWC
TRACK FORECAST.//
NNNN
Typhoon MEGI JMV 3.0 Data (JTWC)
WTPN51 PGTW 270300    
WARNING    ATCG MIL 20W NWP 160927005207
2016092700 20W MEGI       017  01 310 13 SATL RADR 015
T000 231N 1232E 100 R064 045 NE QD 035 SE QD 030 SW QD 035 NW QD R050 120 NE QD 110 SE QD 075 SW QD 100 NW QD R034 250 NE QD 250 SE QD 170 SW QD 215 NW QD 
T012 239N 1209E 075 R064 025 NE QD 015 SE QD 010 SW QD 015 NW QD R050 080 NE QD 075 SE QD 050 SW QD 070 NW QD R034 215 NE QD 210 SE QD 155 SW QD 190 NW QD 
T024 247N 1186E 050 R050 035 NE QD 030 SE QD 015 SW QD 025 NW QD R034 115 NE QD 110 SE QD 075 SW QD 100 NW QD 
T036 249N 1169E 035 R034 030 NE QD 030 SE QD 020 SW QD 020 NW QD 
T048 249N 1156E 020 
AMP
    036HR DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    048HR DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
SUBJ:  TYPHOON 20W (MEGI) WARNING NR 017    
1. TYPHOON 20W (MEGI) WARNING NR 017    
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   270000Z --- NEAR 23.1N 123.2E
     MOVEMENT PAST SIX HOURS - 310 DEGREES AT 13 KTS
     POSITION ACCURATE TO WITHIN 015 NM
     POSITION BASED ON EYE FIXED BY A COMBINATION OF 
     SATELLITE AND RADAR
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 064 KT WINDS - 045 NM NORTHEAST QUADRANT
                            035 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            035 NM NORTHWEST QUADRANT
   RADIUS OF 050 KT WINDS - 120 NM NORTHEAST QUADRANT
                            110 NM SOUTHEAST QUADRANT
                            075 NM SOUTHWEST QUADRANT
                            100 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 250 NM NORTHEAST QUADRANT
                            250 NM SOUTHEAST QUADRANT
                            170 NM SOUTHWEST QUADRANT
                            215 NM NORTHWEST QUADRANT
   REPEAT POSIT: 23.1N 123.2E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   271200Z --- 23.9N 120.9E
   MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   VECTOR TO 24 HR POSIT: 290 DEG/ 11 KTS
    ---
   24 HRS, VALID AT:
   280000Z --- 24.7N 118.6E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   VECTOR TO 36 HR POSIT: 280 DEG/ 08 KTS
    ---
   36 HRS, VALID AT:
   281200Z --- 24.9N 116.9E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   VECTOR TO 48 HR POSIT: 270 DEG/ 06 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   290000Z --- 24.9N 115.6E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
270300Z POSITION NEAR 23.3N 122.6E.
TYPHOON 20W (MEGI), LOCATED APPROXIMATELY 152 NM SOUTHEAST OF
TAIPEI, TAIWAN, HAS TRACKED NORTHWESTWARD AT 13 KNOTS OVER THE
PAST SIX HOURS.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 270000Z IS 36 FEET. NEXT
WARNINGS AT 270900Z, 271500Z, 272100Z AND 280300Z.
//
2016092106 102N1496E  20
2016092112 101N1467E  20
2016092118 100N1440E  20
2016092200 103N1425E  20
2016092206 113N1412E  20
2016092212 128N1405E  20
2016092218 141N1401E  20
2016092300 158N1396E  30
2016092306 166N1389E  35
2016092312 169N1381E  35
2016092318 172N1371E  35
2016092400 176N1364E  50
2016092406 183N1353E  60
2016092406 183N1353E  60
2016092412 184N1340E  65
2016092412 184N1340E  65
2016092418 187N1328E  75
2016092418 187N1328E  75
2016092418 187N1328E  75
2016092500 192N1316E  90
2016092500 192N1316E  90
2016092500 192N1316E  90
2016092506 198N1303E  90
2016092506 198N1303E  90
2016092506 198N1303E  90
2016092512 202N1293E  90
2016092512 202N1293E  90
2016092512 202N1293E  90
2016092518 206N1283E  90
2016092518 206N1283E  90
2016092518 206N1283E  90
2016092600 210N1273E  90
2016092600 210N1273E  90
2016092600 210N1273E  90
2016092606 214N1262E  95
2016092606 214N1262E  95
2016092606 214N1262E  95
2016092612 218N1253E  90
2016092612 218N1253E  90
2016092612 218N1253E  90
2016092618 223N1243E 100
2016092618 223N1243E 100
2016092618 223N1243E 100
2016092700 231N1232E 100
2016092700 231N1232E 100
2016092700 231N1232E 100
NNNN

Radar

Satellite Imagery

Satellite Animations

NHC Forecast Track (Tropical Storm ROSLYN)
Tropical Storm ROSLYN Forecast Track (National Hurricane Center)
Tropical Storm ROSLYN Storm-Centered Infrared
Tropical Storm ROSLYN Storm-Centered Infrared (Aviation Color Enhancement)
Tropical Storm ROSLYN Storm-Centered Visible

Summary for Tropical Storm ROSLYN (EP3/EP182016)

...ROSLYN FORECAST TO WEAKEN... As of 8:00 PM PDT Mon Sep 26 the center of ROSLYN was located near 17.2, -118.4 with movement ENE at 5 mph. The minimum central pressure was 1000 mb with maximum sustained winds of about 50 mph.

Tropical Storm ROSLYN Public Advisory Number 7

...ROSLYN FORECAST TO WEAKEN...
Location: 17.2°N 118.4°W
Max sustained: 50 mph
Moving: ENE at 5 mph
Min pressure: 1000 mb

Issued at 800 PM PDT MON SEP 26 2016

Tropical Storm ROSLYN Forecast Advisory Number 7

Issued at 0300 UTC TUE SEP 27 2016

Tropical Storm ROSLYN Forecast Discussion Number 7

Issued at 800 PM PDT MON SEP 26 2016

Tropical Storm ROSLYN Wind Speed Probabilities Number 7

Issued at 0300 UTC TUE SEP 27 2016

Tropical Storm ROSLYN Graphics

Tropical Storm ROSLYN 5-Day Uncertainty Track Image
5-Day Uncertainty Track last updated Tue, 27 Sep 2016 02:35:36 GMT

Tropical Storm ROSLYN 34-Knot Wind Speed Probabilities
Wind Speed Probabilities last updated Tue, 27 Sep 2016 03:04:36 GMT

Tropical Storm ROSLYN 5-Day Track, Uncertainty Cone, Warnings (.shp)

GIS Data last updated Tue, 27 Sep 2016 02:34:45 GMT

Tropical Storm ROSLYN Best Track Information (.shp)

GIS Data last updated Tue, 27 Sep 2016 02:33:22 GMT

Tropical Storm ROSLYN Best Track Information (.kmz)

GIS Data last updated Tue, 27 Sep 2016 02:33:24 GMT

Tropical Storm ROSLYN Forecast Information (.shp)

GIS Data last updated Tue, 27 Sep 2016 02:33:26 GMT

Tropical Storm ROSLYN Information by ATCF XML Prototype

Issued at Tue, 27 Sep 2016 02:33:37 GMT. This is only a prototype and the file format may change without notice.

SpaghettiTropical Storm ROSLYN Spaghetti Models (UWM)

Satellite Imagery

Satellite Animations

NHC Forecast Track (Tropical Depression 19E)
Tropical Depression 19E Forecast Track (National Hurricane Center)
Tropical Depression 19E Storm-Centered Infrared
Tropical Depression 19E Storm-Centered Infrared (Aviation Color Enhancement)
Tropical Depression 19E Storm-Centered Visible

Summary for Tropical Depression NINETEEN-E (EP4/EP192016)

...TROPICAL DEPRESSION MOVES INTO CENTRAL PACIFIC BASIN... As of 2:00 PM PDT Mon Sep 26 the center of NINETEEN-E was located near 11.6, -140.4 with movement WNW at 5 mph. The minimum central pressure was 1005 mb with maximum sustained winds of about 35 mph.

Tropical Depression NINETEEN-E Public Advisory Number 2

...TROPICAL DEPRESSION MOVES INTO CENTRAL PACIFIC BASIN...
Location: 11.6°N 140.4°W
Max sustained: 35 mph
Moving: WNW at 5 mph
Min pressure: 1005 mb

Issued at 200 PM PDT MON SEP 26 2016

Tropical Depression NINETEEN-E Forecast Advisory Number 2

Issued at 2100 UTC MON SEP 26 2016

Tropical Depression NINETEEN-E Forecast Discussion Number 2

Issued at 200 PM PDT MON SEP 26 2016

Tropical Depression NINETEEN-E Wind Speed Probabilities Number 2

Issued at 2100 UTC MON SEP 26 2016

Tropical Depression NINETEEN-E Graphics

Tropical Depression NINETEEN-E 5-Day Uncertainty Track Image
5-Day Uncertainty Track last updated Mon, 26 Sep 2016 21:39:35 GMT

Tropical Depression NINETEEN-E 34-Knot Wind Speed Probabilities
Wind Speed Probabilities last updated Tue, 27 Sep 2016 03:05:10 GMT

Tropical Depression NINETEEN-E 5-Day Track, Uncertainty Cone, Warnings (.shp)

GIS Data last updated Mon, 26 Sep 2016 21:38:40 GMT

Tropical Depression NINETEEN-E Best Track Information (.shp)

GIS Data last updated Mon, 26 Sep 2016 21:34:42 GMT

Tropical Depression NINETEEN-E Best Track Information (.kmz)

GIS Data last updated Mon, 26 Sep 2016 21:34:44 GMT

Tropical Depression NINETEEN-E Forecast Information (.shp)

GIS Data last updated Mon, 26 Sep 2016 21:34:46 GMT

Tropical Depression NINETEEN-E Information by ATCF XML Prototype

Issued at Mon, 26 Sep 2016 21:36:39 GMT. This is only a prototype and the file format may change without notice.

SpaghettiTropical Depression 19E Spaghetti Models (UWM)

Satellite Imagery

Satellite Animations