National Weather Service United States Department of Commerce

703 
ACUS74 KLIX 021941
PSHLIX

POST TROPICAL CYCLONE REPORT...HURRICANE LAURA 
NATIONAL WEATHER SERVICE NEW ORLEANS LA 
241 PM CDT WED SEP 2 2020


NOTE: THE DATA SHOWN HERE ARE PRELIMINARY....AND SUBJECT TO UPDATES 
AND CORRECTIONS AS APPROPRIATE.

THIS REPORT INCLUDES EVENTS OCCURRING WHEN WATCHES AND/OR WARNINGS 
WERE IN EFFECT...OR WHEN SIGNIFICANT FLOODING ASSOCIATED WITH LAURA
OR ITS REMNANTS WAS AFFECTING THE AREA.

LA PARISHES INCLUDED...ASCENSION...ASSUMPTION...EAST BATON ROUGE...
EAST FELICIANA...IBERVILLE...JEFFERSON...LAFOURCHE...LIVINGSTON...
ORLEANS...PLAQUEMINES...POINTE COUPEE...ST. BERNARD...ST. CHARLES...
ST. HELENA...ST. JAMES...ST. JOHN THE BAPTIST...ST. TAMMANY...
TANGIPAHOA...TERREBONNE...WASHINGTON...WEST BATON ROUGE...WEST
FELICIANA.

MS COUNTIES INCLUDED...AMITE...HANCOCK...HARRISON...JACKSON...
PEARL RIVER...PIKE...WALTHALL...WILKINSON.

9/2/2020 - UPDATE #1 - UPDATED TO INCLUDE REPORTED RAINFALL TOTALS 
OVER 2.5 INCHES AND KNOWN IMPACTS FOR A FEW SPECIFIC PARISHES AND
COUNTIES.


A. LOWEST SEA LEVEL PRESSURE/MAXIMUM SUSTAINED WINDS AND PEAK GUSTS
---------------------------------------------------------------------
METAR OBSERVATIONS...
NOTE: ANEMOMETER HEIGHT IS 10 METERS AND WIND AVERAGING IS 2 MINUTES
---------------------------------------------------------------------
LOCATION  ID    MIN    DATE/     MAX      DATE/     PEAK    DATE/
LAT  LON        PRES   TIME      SUST     TIME      GUST    TIME
DEG DECIMAL     (MB)   (UTC)     (KT)     (UTC)     (KT)    (UTC)
---------------------------------------------------------------------
KMCB-MCCOMB AIRPORT
31.18 -90.47  1007.5  27/1042   180/028  27/1530   180/044 27/1529  

KNEW-NEW ORLEANS LAKEFRONT AIRPORT
30.04 -90.03  1008.8  27/1037   200/029  27/1519   210/042 27/1518  

KBTR-BATON ROUGE AIRPORT
30.54 -91.15  1004.4  27/1016   170/028  27/1450   160/036 27/1333  

KMSY-NEW ORLEANS ARMSTRONG INTL AIRPORT
29.98 -90.25  1008.8  27/1037   110/027  26/1715   120/035 26/1715  

REMARKS: WIND IS REPORTED AS DDD/SSS WHERE DDD IS THE CARDINAL
DIRECTION AND SSS IS THE SPEED. STATIONS ARE ONLY LISTED IF PEAK
WIND GUSTS WERE 34KTS OR HIGHER OR MINIMUM PRESSURE WAS 1005 MB
OR LOWER. FOR STATIONS NOT LISTED, WIND GUSTS GENERALLY PEAKED IN 
THE 20 TO 30 KT RANGE.


NON-METAR OBSERVATIONS...
NOTE: ANEMOMETER HEIGHT IN METERS AND WIND AVERAGING PERIOD IN
MINUTES INDICATED UNDER MAXIMUM SUSTAINED WIND IF KNOWN
---------------------------------------------------------------------
LOCATION  ID    MIN    DATE/     MAX      DATE/     PEAK    DATE/
LAT  LON        PRES   TIME      SUST     TIME      GUST    TIME
DEG DECIMAL     (MB)   (UTC)     (KT)     (UTC)     (KT)    (UTC)
---------------------------------------------------------------------
WX FLOW-DULAC
29.35 -90.73  1006.9  27/0816   150/030  27/0816   138/044 26/1701
                                10.3/1

WX FLOW-MANDEVILLE
30.40 -90.09  1007.5  27/1043   129/032  27/0938   129/038 27/0938
                              10.3M/1MIN

WX FLOW-BAYOU BIENVENUE
30.00 -89.90  1006.1  27/1023   106/029  26/1818   109/036 26/1738
                              27.4M/1MIN

REMARKS: WIND IS REPORTED AS DDD/SSS WHERE DDD IS THE CARDINAL 
DIRECTION AND SSS IS THE SPEED. STATIONS ARE ONLY LISTED IF PEAK 
WIND GUSTS WERE 34KTS OR HIGHER OR MINIMUM PRESSURE WAS 1005 MB OR 
LOWER. FOR STATIONS NOT LISTED, WIND GUSTS GENERALLY PEAKED IN THE 
20 TO 30 KT RANGE.

 


B. MARINE OBSERVATIONS...
NOTE: ANEMOMETER HEIGHT IN METERS AND WIND AVERAGING PERIOD IN
MINUTES INDICATED UNDER MAXIMUM SUSTAINED WIND IF KNOWN
---------------------------------------------------------------------
LOCATION  ID    MIN    DATE/     MAX      DATE/     PEAK    DATE/
LAT  LON        PRES   TIME      SUST     TIME      GUST    TIME
DEG DECIMAL     (MB)   (UTC)     (KT)     (UTC)     (KT)    (UTC)
---------------------------------------------------------------------
WX FLOW-MID LAKE
30.20 -90.12  1007.4  27/1038   116/027  26/2208   171/039 27/1528
                               12.5M/1MIN 

PSTL1-PILOTS STAT E
28.93 -89.41  1008.0  26/0836   115/033  26/1312   105/043 26/0342  
                              20.3M/2MIN

BURL1-NOAA C-MAN SW PASS
28.90 -89.43                    999/032  26/0200   999/036 26/0200  
                               38M/10MIN

FREL1-FRENIER LANDING, LA NOS
30.11 -90.42  1007.7  27/1018   129/025  27/0712   129/034 27/0712  
                                10M/1MIN

GISL1-NOAA C-MAN GRAND ISLE
29.26 -89.96                    203/024  27/2036   031/034 26/2036  
                               6.6M/2MIN

KMIS-MP 140B
29.30 -88.84  1010.4  26/0915   120/024  26/0035   130/034 26/0915  
                                85M/2MIN

REMARKS: NO OTHER MARINE REPORTING SITES REPORTED WIND GUSTS OF 34
KTS OR GREATER OR PRESSURES OF 1005 MB OR LOWER. PEAK WIND GUSTS AT
SITES NOT LISTED GENERALLY FELL INTO THE 25 TO 30 KT RANGE.

 


C. STORM TOTAL RAINFALL FROM 1200 UTC AUG 26 UNTIL 1200 UTC AUG 28
---------------------------------------------------------------------
CITY/TOWN                    COUNTY               ID         RAINFALL
LAT LON                                                       (IN)   
DEG DECIMAL
---------------------------------------------------------------------
ST BERNARD 2.7 E             ST. BERNARD         LA-SB-2       3.82
29.87  -89.81

JACKSON 10.1 SSW             EAST BATON ROUGE    LA-EB-56      3.63
30.69  -91.26

WAKEFIELD 0.9 WNW            WEST FELICIANA      LA-WF-4       3.53
30.89  -91.36

DENHAM SPRINGS 6.8 N         LIVINGSTON          LA-LV-2       3.28
30.58  -90.97

ASHWOOD 5.7 SW               WEST FELICIANA      LA-WF-5       3.21
30.98  -91.36

PASS CHRISTIAN 3.5 NE        HARRISON            MS-HR-10      2.92
30.36  -89.21

BROWNSFIELD 4.0 E            EAST BATON ROUGE    LA-EB-23      2.90
30.55  -91.05

WAVELAND 1.0 NW              HANCOCK             MS-HC-18      2.75
30.30  -89.40

SHENANDOAH 1.5 E             EAST BATON ROUGE    LA-EB-22      2.56
30.40  -90.98

MONTICELLO 3.0 ENE           EAST BATON ROUGE    LA-EB-19      2.55
30.51  -91.00

REMARKS: ONLY STATIONS WITH GREATER THAN 2.5 INCHES OF ACCUMULATION 
ARE INCLUDED. HEAVIEST RAIN FELL IN TWO GENERAL SWATHS - ONE FROM 
LOWER LAFOURCHE NORTHEASTWARD TOWARD GULFPORT, AND THE SECOND FROM
LOWER LAFOURCHE NORTHWESTWARD TO NORTH OF BATON ROUGE. OUTSIDE OF 
THOSE TWO SWATHS, THE TWO-DAY RAINFALL TOTALS GENERALLY RANGED FROM 
1 TO 1.5 INCHES.

HEAVY RAINFALL ON THE 28TH ALSO RESULTED IN SOME FLASH FLOODING 
ACROSS A PORTION OF MAINLY JEFFERSON PARISH, BUT THIS WAS NOT 
DIRECLTY TIED TO LAURA'S CIRCULATION.

 

D. INLAND FLOODING...
---------------------------------------------------------------------
---------------------------------------------------------------------
REMARKS: NO INLAND FLOODING RECORDED.

 


E. MAXIMUM OBSERVED WATER LEVEL (WL)...
---------------------------------------------------------------------
ID     CITY/TOWN       COUNTY     STATE  WL  DATUM  DATE/   SOURCE        
       OR LOCATION                      (FT)        TIME
---------------------------------------------------------------------
BCFL1  BONNET CARRE SP ST. CHARLES  LA  3.07 MHHW   27/1942 NOS     
30.0679  -90.3900

NWCL1  NEW CANAL       ORLEANS      LA  3.04 MHHW   27/1918 NOS     
30.0272  -90.1133

SHBL1  SHELL BEACH     ST. BERNARD  LA  2.81 MHHW   26/1333 NOS     
29.8681  -89.6732

WYCM6  WAVELAND        HANCOCK      MS  2.72 MHHW   27/1106 NOS     
30.3250  -89.3250

PTFL1  PORT FOURCHON   LAFOURCHE    LA  2.37 MHHW   27/1142 NOS     
29.1143  -90.1992

PSTL1  PILOTS STATION  PLAQUEMINES  LA  2.27 MHHW   27/0900 NOS     
28.9322  -89.4075

PNLM6  PASCAGOULA NOAA JACKSON      MS  2.22 MHHW   27/0924 NOS     
30.3678  -88.5631

PILL1  PILOTTOWN       PLAQUEMINES  LA  1.47 MHHW   27/1054 NOS     
29.1783  -89.2583

DCLL1  SW OF DULAC     TERREBONNE   LA  5.38 NAVD88 27/1300 USGS 
29.2491  -90.9211

CCOL1  SW OF COCODRIE  TERREBONNE   LA  4.85 NAVD88 27/0745 USGS
9.0781  -90.8712

EGIL1  BARATARIA PASS  JEFFERSON    LA  4.70 NAVD88 27/1230 USGS 
29.2728  -89.9467

PSIL1  BLACK BAY PALH  PLAQUEMINES  LA  4.58 NAVD88 26/1300 USGS
29.6333  -89.5636

NGIL1  BARATARIA BAY   JEFFERSON    LA  4.48 NAVD88 27/1000 USGS
29.4225  -89.9506

PLHL1  AMER BAY PALH   PLAQUEMINES  LA  4.25 NAVD88 26/1215 USGS
29.3571  -89.7039

CTFL1  CUTOFF          TERREBONNE   LA  4.24 NAVD88 27/1415 USGS
29.5175  -90.1813

COCL1  CAERNARVON      PLAQUEMINES  LA  4.12 NAVD88 27/1700 USACE
29.8587  -89.9068

EPCM6  CLAIBORNE       HANCOCK      MS  4.11 NAVD88 27/1315 USGS
30.1947  -89.5342

CBDL1  DELACROIX       PLAQUEMINES  LA  4.03 NAVD88 27/1400 USGS
29.7081  -89.7194

HACL1  HACKBERRY BAY   LAFOURCHE    LA  3.96 NAVD88 27/1130 USGS
29.3983  -90.0411

BDML1  BAYOU DUPREE    ST. BERNARD  LA  3.89 NAVD88 26/1300 USACE
29.9351  -89.8366

LPML1  MANDEVILLE      ST. TAMMANY  LA  3.89 NAVD88 27/1800 USACE
30.3658  -90.0923

PMPL1  PASS MANCHAC    ST. JOHN     LA  3.83 NAVD88 27/1700 USACE
30.2814  -90.4003

TSPL1  SPRINGFIELD     LIVINGSTON   LA  3.81 NAVD88 27/1900 USACE
30.3764  -90.5506

PLAL1  LAKEFRONT AP    ORLEANS      LA  3.77 NAVD88 27/1700 USACE
30.0399  -90.0188

CPGL1  CAMINADA PASS   JEFFERSON    LA  3.70 NAVD88 27/1145 USGS 
29.2314  -90.0483

MAUL1  MAUREPAS        LIVINGSTON   LA  3.54 NAVD88 27/2215 USGS
30.3092  -90.6103

WEGL1  WEST END        ORLEANS      LA  3.51 NAVD88 27/1900 USACE
30.0222  -90.1156

EWEL1  EMPIRE          PLAQUEMINES  LA  3.49 NAVD88 27/1015 USGS
29.3044  -89.5969

OFBM6  OCEAN SPRINGS   JACKSON      MS  3.46 NAVD88 27/1015 USGS
30.4192  -88.8281

CMPL1  CHEF PASS       ORLEANS      LA  3.41 NAVD88 27/1400 USACE
30.0667  -89.8010

LBWL1  LAFITTE         JEFFERSON    LA  3.40 NAVD88 27/1900 USACE
29.6694  -90.1106

BSGL1  BAYOU SEGNETTE  JEFFERSON    LA  3.39 NAVD88 27/2000 USACE
29.8968  -90.1567

RIGL1  RIGOLETS        ORLEANS      LA  3.36 NAVD88 27/1500 USACE
30.1634  -89.7379

GRPL1  GRAND PASS      ST. BERNARD  LA  3.26 NAVD88 27/1045 USGS
30.1228  -89.2503

SWBL1  SW PASS E JETTY PLAQUEMINES  LA  3.10 NAVD88 27/0900 USACE
28.9323  -89.4071

REMARKS: NOS GAUGES REPORTED IN MHHW AS AN APPROXIMATION FOR 
INUNDATION. USGS AND USACE GAUGES REPORTED IN NAVD88 WHICH MAY NOT
BE REPRESENTATIVE OF INUNDATION LEVEL.


F. TORNADOES...
---------------------------------------------------------------------
(DIST)CITY/TOWN              COUNTY           DATE/         EF SCALE
LAT LON (DEG DECIMAL)                         TIME(UTC)    (IF KNOWN)
DESCRIPTION
---------------------------------------------------------------------
THERE WERE SEVERAL REPORTS OF FUNNEL CLOUDS AND ONE REPORT OF A 
POSSIBLE TORNADO TOUCHDOWN NEAR PAINCOURTVILLE, BUT NO DAMAGE REPROTS
WERE RECEIVED.

 

G. STORM IMPACTS BY COUNTY...
---------------------------------------------------------------------
COUNTY            DEATHS           INJURIES             EVACUATIONS  
DESCRIPTION
---------------------------------------------------------------------
JEFFERSON           0                  0                    UNK

STORM SURGE FLOODED ROADS ON GRAND ISLE AND ALSO CUT OFF ACCESS TO 
THE ISLAND VIA LA HWY 1.


LAFOURCHE           0                  0                    UNK

STORM SURGE FLOODED ROADS SOUTH OF THE MORGANZA TO THE GULF LEVEE 
SYSTEM. WATER LEVELS OVER THE ROAD WERE 4 TO 6 FEET IN THE LOWEST
SPOTS OF LA HWY 1.


ST. TAMMANY         0                  0                    UNK

STORM SURGE FLOODED LOW LYING COASTAL AREAS OF SLIDELL AS WELL AS 
THE MANDEVILLE LAKEFRONT.


TERREBONN           0                  0                    112

STORM SURGE FLOODED SEVERAL ROADS, INCLUDING LA HWY 56 TO COCODRIE,
AND ENTERED A FEW BUILDINGS OUTSIDE THE PARISH'S LEVEES. 112 PEOPLE
WHO WERE UNDER EVACUATION ORDERS WERE HOUSED IN LOCAL HOTELS.


HANCOCK             0                  0                    UNK

STORM SURGE FLOODED NUMEROUS ROADS AROUND ST. LOUIS BAY AND MADE 
SEVERAL IMPASSIBLE.


JACKSON             0                  0                    UNK

STORM SURGE RESULTED IN MINOR FLOODING OF SEVERAL ROADS. WAVE ACTION
ALSO RESULTED IN MINOR BEACH EROSION ON FRONT BEACH AND EAST BEACH 
IN OCEAN SPRINGS, AND THE BEACH IN PASCAGOULA.

$$

LEGEND:
I-INCOMPLETE DATA
E-ESTIMATED

MANNING