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Nws chs ron morales - cema hur conf 2010

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  • 1. National Hurricane Center Product Changesfor the 2010 Hurricane Season
    Ron Morales
    National Weather Service
    Charleston, South Carolina
    Weather.gov/chs
    2010 CEMA Hurricane Conference
  • 2. Outline
    • Watch / Warning Issuance Times
    • 3. Tropical Cyclone Public Advisory Format
    • 4. Tropical Cyclone Update Format
    • 5. Tropical Weather Outlook Additions
    • 6. Saffir-Simpson Hurricane Wind Scale
    • 7. Size of Tropical Cyclone Forecast Cone
    • 8. 2010 Tropical Season Outlook
  • Tropical Storm Watches and Warnings
    Tropical Storm WatchTropical storm conditions (sustained winds of 39 to 73 mph) are possible within the specified coastal area within 48 hours
    Tropical Storm Warning
    Tropical storm conditions (sustained winds of 39 to 73 mph) are expected somewhere within the specified coastal area within 36 hours
  • 9. Hurricane Watches and Warnings
    Hurricane WatchHurricane conditions (sustained winds of 74 mph or higher) are possible within the specified coastal area. Because hurricane preparedness activities become difficult once winds reach tropical storm force, the hurricane watch is issued 48 hours in advance of the anticipated onset of tropical-storm-force winds
    Hurricane Warning
    Hurricane conditions (sustained winds of 74 mph or higher) are expected somewhere within the specified coastal area. Because hurricane preparedness activities become difficult once winds reach tropical storm force, the hurricane warning is issued 36 hours in advance of the anticipated onset of tropical-storm-force winds
  • 10. Track Errors Cut in Half
    Last 15-20 Years!
  • 11. 1970
    48-hour Forecast Point over Charleston, SC
    Average Error = 300 nautical miles
  • 12. Now
    48-hour Forecast Point over Charleston, SC
    Average Error = 80 nautical miles (~ 70% Reduction!)
  • 13. NHC Public Advisory
    • Basic Format Not Changed
    Since 1960s
    • Plain-Language Intended for
    “Rip and Read”
    • Not Easily Parsable Until
    Summary Section Became
    Tabular Format in 2009
    • Must Dig Through Several
    Paragraphs of Text to Find
    Basic Storm Info
    • Storm Hazards and Impacts
    Buried Near Bottom
  • 14. HURRICANE IKE ADVISORY NUMBER 42
    NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL092008
    1000 AM CDT THU SEP 11 2008
    ...IKE CONTINUES TO GROW IN SIZE BUT HAS NOT STRENGTHENED YET...
    ...HURRICANE WARNING ISSUED FOR NORTHWESTERN GULF COAST...
    SUMMARY OF 10 AM CDT…1500 UTC…INFORMATION
    ------------------------------------------
    LOCATION…25.5N 88.4W
    ABOUT 580 MI…930 KM ESE OF CORPUS CHRISTI TEXAS
    ABOUT 470 MI…760 KM ESE OF GALVESTON TEXAS
    MAXIMUM SUSTAINED WINDS…100 MPH…160 KM/HR
    PRESENT MOVEMENT…WNW OR 290 DEGREES AT 10 MPH…17 KM/HR
    WATCHES AND WARNINGS
    ---------------------
    CHANGES WITH THIS ADVISORY…
    A HURRICANE WARNING HAS BEEN ISSUED FROM MORGAN CITY LOUISIANA TO BAFFIN BAY TEXAS.
    A TROPICAL STORM WARNING HAS BEEN ISSUED FROM SOUTH OF BAFFIN BAY TO PORT MANSFIELD TEXAS.
    SUMMARY OF WATCHES AND WARNINGS IN EFFECT…
    A HURRICANE WARNING IS IN EFFECT FOR…
    * MORGAN CITY LOUISIANA TO BAFFIN BAY TEXAS
    A TROPICAL STORM WARNING IS IN EFFECT FOR…
    * EAST OF MORGAN CITY TO THE MISSISSIPPI-ALABAMA BORDER...INCLUDING THE CITY OF NEW ORLEANS AND LAKE PONTCHARTRAIN
    A HURRICANE WATCH IS IN EFFECT FOR…
    * BAFFIN BAY TO PORT MANSFIELD TEXAS
    A HURRICANE WARNING MEANS THAT SUSTAINED HURRICANE FORCE WINDS ARE EXPECTED WITHIN THE WARNING AREA. THE WARNING IS ISSUED 36 HOURS IN ADVANCE OF THE POSSIBLE ONSET OF TROPICAL STORM FORCE WINDS. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE IN THE WARNING AREA WITHIN THE NEXT 36 HOURS.
    FOR STORM INFORMATION SPECIFIC TO YOUR AREA...INCLUDING POSSIBLE INLAND WATCHES A ND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL WEATHER OFFICE.
    DISCUSSION AND 48-HOUR OUTLOOK
    -------------------------------
    AT 1000 AM CDT...1500Z...THE CENTER OF HURRICANE IKE WAS LOCATED NEAR LATITUDE 25.5 NORTH...LONGITUDE 88.4 WEST OR ABOUT 580 MILES... 930 KM...EAST-SOUTHEAST OF CORPUS CHRISTI TEXAS AND ABOUT 470 MILES ...760 KM...EAST-SOUTHEAST OF GALVESTON TEXAS. IKE IS MOVING TOWARD THE WEST-NORTHWEST NEAR 10 MPH...17 KM/HR. A GENERAL WEST-NORTHWESTWARD MOTION IS EXPECTED OVER THE NEXT DAY OR SO...AND THE CENTER OF IKE SHOULD BE VERY NEAR THE COAST BY LATE FRIDAY. HOWEVER...BECAUSE IKE IS A VERY LARGE TROPICAL CYCLONE...WEATHER WILL DETERIORATE ALONG THE COASTLINE LONG BEFORE THE CENTER REACHES THE COAST.
    MAXIMUM SUSTAINED WINDS ARE NEAR 100 MPH...160 KM/HR...WITH HIGHER GUSTS. IKE IS A CATEGORY TWO HURRICANE ON THE SAFFIR-SIMPSON SCALE. IKE IS FORECAST TO BECOME A MAJOR HURRICANE PRIOR TO REACHING THE COASTLINE.
    IKE REMAINS A VERY LARGE TROPICAL CYCLONE. HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 115 MILES...185 KM...FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 275 MILES...445 KM.
    THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY A NOAA HURRICANE HUNTER AIRCRAFT WAS 945 MB...27.91 INCHES.
    HAZARDS AFFECTING LAND
    -----------------------
    WINDS… HURRICANE CONDITIONS COULD REACH THE COAST WITHIN THE WARNING AREA BY LATE FRIDAY.
    STORM SURGE FLOODING…COASTAL STORM SURGE FLOODING OF UP TO 20 FT ABOVE NORMAL TIDE LEVELS...ALONG WITH LARGE AND DANGEROUS BATTERING WAVES...CAN BE EXPECTED NEAR AND TO THE EAST OF WHERE THE CENTER OF IKE MAKES LANDFALL. COASTAL STORM SURGE FLOODING OF 5 TO 7 FEET ABOVE NORMAL TIDE LEVELS...ALONG WITH LARGE AND DANGEROUS WAVES...CAN BE EXPECTED WITHIN THE TROPICAL STORM WARNING AREA ALONG THE NORTHERN GULF COAST. ABOVE NORMAL TIDES IN THE EASTERN GULF OF MEXICO SHOULD GRADUALLY SUBSIDE OVER THE NEXT DAY OR SO.
    RAINFALL…IKE IS EXPECTED TO PRODUCE RAINFALL AMOUNTS OF 5 TO 10 INCHES ALONG THE CENTRAL AND UPPER TEXAS COAST AND OVER PORTIONS OF SOUTHWESTERN LOUISIANA...WITH ISOLATED MAXIMUM AMOUNTS OF 15 INCHES POSSIBLE. RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE OVER PORTIONS OF THE YUCATAN PENINSULA.
    NEXT ADVISORY
    --------------
    NEXT INTERMEDIATE ADVISORY…100 PM CDT.
    NEXT COMPLETE ADVISORY AT…400 PM CDT.
    $$
    FORECASTER FRANKLIN
    Public Advisory –
    2010 New Format
  • 15. New Public Advisory Format
    Section Headers Added
    Storm Info First
    Changes to Watches/Warnings in the Current Advisory are Highlighted
    Bulleted Summary of All Watches/Warnings in Effect
  • 16. New Public Advisory Format
    Section Headers
    Discussion of Forecast Motion, Intensity and Other Pertinent Info
    Storm Hazards and Impacts Shown by Type
  • 17. New Tropical Cyclone Update Format
    ZCZC MIATCUAT4 ALL TTAA00 KNHC DDHHMM TROPICAL STORM CLAUDETTE TROPICAL CYCLONE UPDATE NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL042009 1215 PM EDT SUN AUG 16 2009 ...DEPRESSION BECOMES TROPICAL STORM CLAUDETTE... DATA FROM THE NOAA DOPPLER RADAR IN TALLAHASSEE FLORIDA INDICATE THAT SURFACE WINDS ASSOCIATED WITH THE DEPRESSION HAVE INCREASED TO 40 MPH...65 KM/HR...INDICATING THAT THE DEPRESSION HAS BECOME A TROPICAL STORM. ...SUMMARY OF 1215 PM EDT INFORMATION... LOCATION...28.7N 84.6W MAXIMUM SUSTAINED WINDS...40 MPH PRESENT MOVEMENT...NORTHWEST OR 320 DEGREES AT 14 MPH MINIMUM CENTRAL PRESSURE...1011 MB $$ FORECASTER XXXX
  • 18. Explicit Probability in Tropical Weather Outlook
    TROPICAL WEATHER OUTLOOK
    NWS NATIONAL HURRICANE CENTER MIAMI, FL
    200 PM EDT TUE SEP 2 2008
    FOR THE NORTH ATLANTIC…CARIBBEAN SEA…AND THE GULF OF MEXICO…
    THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON TROPICAL
    STORM BERTHA….LOCATED ABOUT 190 MILES NORTH-NORTHEAST OF
    BERMUDA.
    THE AREA OF LOW PRESSURE LOCATED ABOUT 950 MILES EAST OF THE
    LESSER ANTILLES HAS CHANGED LITTLE IN ORGANIZATION THIS MORNING.
    ENVIRONMENTAL CONDITIONS APPEAR FAVORABLE FOR DEVELOPMENT
    AND THIS SYSTEM COULD BECOME A TROPICAL DEPRESSION DURING THE
    NEXT DAY OR SO. THERE IS A MEDIUM CHANCE…50 PERCENT…OF
    THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48
    HOURS.
    $$
    FORECASTER BROWN
    200 PM TUE SEP 2 2008
  • 19. The All-New Saffir-Simpson Scale
    No More Flooding Impacts!
    No More Storm Surge!
    No More Central Pressure!
  • 20. Saffir-Simpson Hurricane Wind Scale
    Surge, Rainfall, and Pressure Fit the Scale Like a Square Peg in a Round Hole
    KATRINA (3)
    IKE (2)
    CHARLEY (4)
    http://www.nhc.noaa.gov/aboutsshs.shtml
  • 21. NHC Forecast Cone
    Represents the Probable Track of the Center of the Tropical Cyclone.
    Formed by Connecting Circles Centered on Each Forecast Point (12, 24, 36 h, etc.)
    Size of the Circles Determined So Actual Storm Will be Within the Circle 67% (2/3) of the Time.
  • 22. Cone vs Size and Impact
    The Cone DOES NOTDenote Area of Impact….
  • 23. Cone vs Size and Impact
    …as Ike’s Hurricane Force Winds Show
  • 24. Error Cone Update
    Slight Reduction in Size Due to Lower Track Errors
  • 25. 2010 Hurricane Season Outlook:What Does it Mean for You?
  • 26. 2009 – Slightly Below “Normal”El Nino Helped!
  • 27. El Nino Forecast for the 2010 Season
    Most Models Forecasting Neutral to La Nina Conditions
    Official Hurricane Season
    Jun 1 – Nov 30
  • 28. NOAA’s Official Hurricane Forecast
    Not Available Until End of May
    However, Expect it to be Similar to Col. State’s Forecast of Above Normal Activity
    2 Main Reasons for Above Normal Activity: - Weakening El Nino - Anomalously Warm Trop. Atlantic Waters
  • 29. Seasonal Forecasts: Consider this!
    What if 2010 Was Like 1992 (Below “Normal”)?
    How Would it Be Portrayed in the Media -> Perceived by Public??
    ANDREW 1992 08/16
  • 30. Seasonal Forecasts: Consider this!
    …but it was a Good Forecast!!!!!!!!!!!!!!!!!!!!!!
  • 31. Seasonal Forecasts: Consider this!
    What if 2010 was Like 1990 (Above “Normal”)?
    Would the Media and Public Care?
  • 32. Above/Below NormalDoes it Really Matter ??
    It Only Takes One Storm
    If Your Area is Hit, it’s a “Bad” Year!
    Be Prepared!!
  • 33. Thank You!
    Ron Morales
    Ron.morales@noaa.gov