Hurricane IVAN
Post-Tropical Cyclone Report

 

 

POST-TROPICAL CYCLONE REPORT...HURRICANE IVAN
NATIONAL WEATHER SERVICE MOBILE AL
420 PM CDT MON SEP 20 2004

A. HIGHEST WINDS...

   ASOS STATIONS...
   MOBILE (MOB)        SUSTAINED 010/51 KNOTS AT 16/0644 UTC
                       PEAK GUST 020/65 KNOTS AT 16/0706 UTC
   PENSACOLA (PNS)     SUSTAINED WIND 120/65 KNOTS AT 16/0650 UTC
                       PEAK GUST 120/89 KNOTS AT 16/0650 UTC
                       NO DATA AFTER 16/0650 UTC
   
   MILITARY SITES...
   PENSACOLA NAS(NPA)  SUSTAINED 150/76 KNOTS AT 16/0829 UTC
                       PEAK GUST 140/107 KNOTS AT 16/0838 UTC

   BUOY DATA...
   DAUPHIN ISLAND (DPIA1)  SUSTAINED 060/61 KNOTS 16/0329 UTC
                           PEAK GUST 050/89 KNOTS AT 16/0329 UTC

   DAVIS INSTRUMENT...
   USS ALABAMA BATTLESHIP ON MOBILE BAY PEAK GUST 91 KNOTS AT        
   16/0635 UTC BEFORE COMPUTER FAILED
   SPANISH FORT PEAK GUST 270/51 KNOTS AT 16/0800 UTC
   SEMMES       PEAK GUST 040/49 KNOTS AT 16/0500 UTC

   AWIS STATIONS...
   FAIRHOPE     PEAK GUST 63 KNOTS AT 16/0418 UTC
   SEMMES       PEAK GUST 51 KNOTS AT 16/0530 UTC
   GRAND BAY    PEAK GUST 62 KNOTS AT 16/0517 UTC
   
   RAWS STATION...
   GRAND BAY    PEAK GUST 50 KNOTS AT 16/0615 UTC

   AWS STATIONS...
   NONE...DATA FLOW LOST BEFORE LANDFALL

   EGLIN AIR FORCE BASE SENSORS IN FLORIDA...
   10 S HAROLD      PEAK GUST 130/78 KNOTS AT 16/0710 UTC
   10 N MARY ESTHER PEAK GUST 120/75 KNOTS AT 16/0730 UTC
   5 NE SEMINOLE    PEAK GUST 170/75 KNOTS AT 16/0940 UTC
   8 SW MOSSY HEAD  PEAK GUST 130/60 KNOTS AT 16/0710 UTC
   2 SW MARY ESTHER PEAK GUST 170/103 KNOTS AT 16/0850 UTC - 
   (OVER THE GULF AT 200 FOOT ELEVATION)

   OTHER OBSERVATIONS...
   WKRG TV STATION IN MOBILE  PEAK GUST 64 KNOTS AT 16/0604 UTC
   WEST PENSACOLA PEAK GUST 84 KNOTS (ON 16TH - TIME AND INSTRUMENT  
   TYPE UNKNOWN)
   GULF SHORES AIRPORT (DOPPLER DOW3)  SUSTAINED WIND 73 KNOTS WITH  
                                       PEAK GUST OF 100 KNOTS
   FAIRHOPE (10-M GILL)  SUSTAINED WIND 060/59 KNOTS AT 16/0644 UTC
                         PEAK GUST 060/77 KNOTS AT 16/0644 UTC
   PENSACOLA (10-M GILL) SUSTAINED WIND 120/70 KNOTS AT 16/0649 UTC
                         PEAK GUST 120/92 KNOTS AT 16/0644 UTC

   NOTE...MOST WIND DATA OBSERVATIONS EAST OF WHERE THE CENTER OF    
   IVAN MADE LANDFALL WERE MISSING DUE TO WIDESPREAD POWER OUTAGES.
      
B. LOWEST PRESSURE...
    
    PENSACOLA (PNS)        970.2 MB AT 16/0645 UTC
    MOBILE (MOB)           964.4 MB AT 16/0725 UTC
    PENSACOLA NAS (NPA)    965.8 MB AT 16/0656 UTC
    DAUPHIN ISLAND (DPIA1) 952.7 MB AT 16/0700 UTC
    BROOKLEY (BFM)         956.0 MB AT 16/0656 UTC
    SEMMES AL              967.5 MB AT 16/0830 UTC
    5 S HAROLD FL          981.4 MB AT 16/0850 UTC
    10 S HAROLD FL         982.1 MB AT 16/0740 UTC
    10 N MARY ESTHER FL    986.8 MB AT 16/0820 UTC
    10 S MOSSY HEAD FL     994.2 MB AT 16/0900 UTC
    5 NE SEMINOLE FL       991.2 MB AT 16/0920 UTC
    8 SW MOSSY HEAD FL     991.0 MB AT 16/0900 UTC

C. RAINFALL...

   RAINFALL REPORTS ARE TOTALS FOR SEPTEMBER 15 AND 16 (48 HOUR      
   TOTALS)

   MOBILE (MOB)          5.56 INCHES
   PENSACOLA NAS (NPA)   8.00 INCHES
   CODEN AL              6.30 INCHES
   EVERGREEN AL          7.25 INCHES
   RICHTON MS            4.50 INCHES   
   THOMASVILLE AL        4.20 INCHES
   ALBERTA AL            6.85 INCHES
   SEMMES AL             5.00 INCHES
   DAPHNE AL             7.50 INCHES
   WEAR TV PENSACOLA FL 15.79 INCHES
   ANDALUSIA AL (HAM)    9.96 INCHES
   CRESTVIEW FL (HAM)    8.40 INCHES
   FORT WALTON FL (HAM)  6.06 INCHES
   MOBILE (7S MOB)       6.53 INCHES
   MOBILE (3S MOB)       6.30 INCHES
   MOBILE (10S MOB)      8.00 INCHES
   MOBILE (2S MOB)       9.90 INCHES
   MUNSON FL             6.50 INCHES
   SILVERHILL (3S) AL   10.16 INCHES
   NICEVILLE FL          6.55 INCHES        
   EGLIN AFB FL (VPS)   15.82 INCHES
   10 S HAROLD FL        5.72 INCHES
   10 S MOSSY HEAD FL    8.92 INCHES      
   5 NE SEMINOLE FL      8.10 INCHES    

D. STORM TIDES...    

   MAXIMUM TIDES WERE GENERALLY 10 TO 15 FEET ABOVE NORMAL TIDE      
   LEVELS ALONG THE BALDWIN COUNTY ALABAMA AND ESCAMBIA AND SANTA    
   ROSA COUNTIES IN FLORIDA.  MAXIMUM TIDES OF 6 TO 9 FEET ABOVE     
   NORMAL OCCURRED ALONG MOBILE COUNTY IN ALABAMA AND OKALOOSA       
   COUNTY IN FLORIDA.  THE HIGHEST LEVELS OCCURRED BETWEEN MIDNIGHT 
   AND 400 AM ON SEPTEMBER 16 AS IVAN MOVED ASHORE...WITH PEAK       
   VALUES LIKELY OCCURRING ACROSS SOUTHEAST BALDWIN COUNTY AND       
   SOUTHWEST ESCAMBIA COUNTY.

E. BEACH EROSION...

   EXTENSIVE BEACH EROSION IN BALDWIN...ESCAMBIA...OKALOOSA          
   AND SANTA ROSA COUNTIES.

F. FLOODING...

   MAJOR FLASH FLOODING OCCURRED IN EASTERN BALDWIN AND WESTERN      
   ESCAMBIA COUNTIES AS RADAR ESTIMATED HOURLY RAINFALL TOTALS       
   APPROACHING 10 INCHES AS THE EYEWALL MOVED INLAND OVER THIS       
   AREA. MODERATE RIVER FLOODING OCCURRED ALONG AND EAST OF THE      
   TRACK OF IVAN.

G. TORNADOES...

   NONE CONFIRMED...HOWEVER VERY HIGH WINDS ASSOCIATED WITH THE      
   EYEWALL OF IVAN RESULTED IN NUMEROUS REPORTS OF POSSIBLE          
   TORNADOES.  THESE REPORTS WERE MOST LIKELY THE RESULT OF INTENSE  
   WINDS IN THE EYEWALL...AND NOT FROM TORNADOES. 

H. STORM EFFECTS...

   PRELIMINARY DAMAGE SURVEYS INDICATE THAT THIS WILL LIKELY BE      
   THE MOST DESTRUCTIVE HURRICANE TO HIT BALDWIN...ESCAMBIA...       
   SANTA ROSA AND OKALOOSA COUNTIES IN OVER A HUNDRED YEARS.         
   PRELIMINARY DAMAGE ESTIMATES COULD EXCEED 5 BILLION DOLLARS.      
   CONSIDERABLE WIND DAMAGE OCCURRED ACROSS ALL OF OUR INLAND        
   COUNTIES...ESPECIALLY ALONG A NORTH-SOUTH LINE EXTENDING FROM     
   ATMORE TO MONROEVILLE TO CAMDEN. PRELIMINARY DEATH TOTALS WERE 13 
   DIRECTLY ATTRIBUTED TO IVAN.  

 

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LAST UPDATED: September 2024