Tropical Storm Cindy developed over the central Gulf of Mexico on June 20th and moved generally northwest for the next few days before making landfall in southwest Louisiana near the Louisiana and Texas state line.
Cindy was an asymmetric system as it moved through the central Gulf toward southwest Louisiana, resulting widespread tropical storm force winds across the Gulf waters of southeast Louisiana and Mississippi.
The minimum sea level pressure in the coastal waters of Southeast Louisiana and Mississippi (1002.1 mb) was recorded by the Louisiana Offshore Oil Port site at 5:34 pm CST on the 20th, though that barometer is about 40 meters above sea level. The Grand Isle Blocks site which is owned and maintained by Louisiana State University, reported a minimum sea level pressure of 1003.4 mb at 6pm CST on the 21st. That site's barometer is only 3 meters above sea level.
Frequent tropical storm force wind gusts were recorded throughout the coastal waters, with occasional reports of sustained tropical storm force winds.  The anemometer at the Louisiana Offshore Oil Port recorded the area's highest sustained wind and wind gust, though the anemometer at that site is nearly 60 meters above sea level. The maximum gust reported was 57 kts, or 66 mph, at 3:34pm CST on the 20th.  The maximum sustained wind reported was 46 kts, or 53 mph, at 4:34 pm CST on the 20th.
The highest sustained wind and wind gust reported by a station with an anemometer at the standard height of 10 meters above sea level were recorded by the Grand Isle Blocks site.  Here, the maximum recorded gust was 55 kts, or 63 mph, at 6pm CST on the 21st.  The maximum sustained wind was 43 kts, or 49 mph, also at 6pm CST on the 21st.

Marine Tropical Storm in COASTAL WATERS FROM PORT FOURCHON LOUISIANA TO LOWER ATCHAFALAYA RIVER LOUISIANA OUT 20 NM, GULF OF MEXICO
From 20-JUN-17 09:00:00 to 20-JUN-17 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Frequent tropical storm force gusts and occasional sustained tropical storm force winds were common across the marine zone. A maximum wind gust of 43 kts, or 50 mph, was measured by the South Timbalier Block station (SPLL1) at 12pm CST on the 20th. A maximum sustained wind of 50 kts, or 58 mph, was also measured at 12pm CST on the 20th.

Marine Tropical Storm in COASTAL WATERS FROM SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON LOUISIANA OUT 20 NM, GULF OF MEXICO
From 20-JUN-17 09:00:00 to 20-JUN-17 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Frequent tropical storm force gusts and occasional sustained tropical storm force winds were common across the marine zone.  A maximum gust of 47 kts, or 54 mph, was reported by the Southwest Pass C-Man station (BURL1) at 12:00pm CST on the 20th. The same station reported a maximum sustained wind of 41 kts, or 47 mph at the same time. The anemometer for this station is approximately 38 meters above sea level. The Grand Isle C-Man (GISL1), which has an anemometer height of just 6.6 meters above sea level, reported a maximum gust of 43 kts, or 49 mph, at 6pm CST on the 20th. It reported a maximum sustained wind speed of 34 kts, or 39 mph, at 5:42pm CST on the 20th.

Marine Tropical Storm in COASTAL WATERS FROM SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON LOUISIANA FROM 20 TO 60 NM, GULF OF MEXICO
From 20-JUN-17 09:00:00 to 20-JUN-17 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Frequent tropical storm force gusts and occasional sustained tropical storm force winds were common across the marine zone. A maximum wind gust of 52 kts, or 60 mph, was measured by the Mississippi Canyon 311 A AWOS (KMDJ) at 12:55pm CST on the 20th. A maximum sustained wind of 43 kts, or 49 mph, was reported at the same time. It should be noted the anemometer for this site is approximately 90 meters above sea level.

Marine Tropical Storm in COASTAL WATERS FROM PORT FOURCHON LOUISIANA TO LOWER ATCHAFALAYA RIVER LOUISIANA FROM 20 TO 60 NM, GULF OF MEXICO
From 20-JUN-17 09:00:00 to 20-JUN-17 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Frequent sustained tropical storm force winds with higher gusts were common across the marine zone. A maximum wind gust of 65 kts, or 75 mph, was measured by the Ship Shoal 178 AWOS (KSPR) at 1:55pm CST on the 20th. A maximum sustained wind of 55 kts, or 63 mph, was also measured at 1:55pm CST on the 20th. It should be noted the anemometer height at this site is approximately 75m above sea level.

Marine Tropical Storm in BRETON SOUND, GULF OF MEXICO
From 20-JUN-17 13:00:00 to 21-JUN-17 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Occasional sustained winds of tropical storm force with frequent tropical storm force gusts were common across the marine zone. The USGS gauge at Bay Gardene near Point A La Hache recorded a maximum sustained wind of 42 kts, or 48 mph, at 5pm CST on the 20th.

Marine Tropical Storm in COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND LOUISIANA OUT 20 NM, GULF OF MEXICO
From 20-JUN-17 16:00:00 to 21-JUN-17 07:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Frequent tropical storm force gusts were common across the marine zone. A maximum wind gust of 37 kts, or 43 mph, was measured by buoy 42067 at 4:40pm CST on the 20th.

Marine Tropical Storm in COASTAL WATERS FROM BOOTHVILLE LOUISIANA TO SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM, GULF OF MEXICO
From 20-JUN-17 15:00:00 to 21-JUN-17 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Occasional sustained winds of tropical storm force with frequent tropical storm force gusts were common across the marine zone. A maximum wind gust of 50 kts, or 58 mph, was measured by the MP 104B AWOS (KMIS) at 2:35 pm CST on the 20th. The highest sustained wind at the same site was 38 kts, or 44 mph, at 4:35pm CST on the 20th. It should be noted that the anemometer at this site is 85 meters above sea level.

Marine Tropical Storm in COASTAL WATERS FROM STAKE ISLAND LOUISIANA TO SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM, GULF OF MEXICO
From 20-JUN-17 09:00:00 to 20-JUN-17 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Frequent sustained tropical storm force winds with higher gusts were common across the marine zone. A maximum wind gust of 53 kts, or 61 mph, was measured by the Mississippi Canyon 474 AWOS (KIKT) at 11:55am CST on the 20th. A maximum sustained wind of 46 kts, or 53 mph, was measured at 11:35am CST on the 20th. It should be noted the anemometer height at this site is approximately 124m above sea level.

Marine Tropical Storm in CHANDELEUR SOUND, GULF OF MEXICO
From 20-JUN-17 13:00:00 to 21-JUN-17 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Though there are no observations within the zone, based on surrounding observations it is likely that occasional sustained winds of tropical storm force with frequent tropical storm force gusts were common across the marine zone. Nearby observations include a USGS gauge at Bay Gardene, and a Weatherflow mesonet site at Ship Island.

Marine Tropical Storm in LAKE BORGNE, GULF OF MEXICO
From 20-JUN-17 12:00:00 to 21-JUN-17 01:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: WLON

Frequent sustained tropical storm force winds with higher gusts were common across the marine zone. A maximum wind gust of 46 kts, or 53 mph, was measured by the Shell Beach WLON station (SHBL1) at 6:12pm CST on the 20th. A maximum sustained wind of 40 kts, or 46 mph, was measured at the same time. The anemometer for this station is 15.6 meters above sea level.

Marine Tropical Storm in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 20-JUN-17 16:00:00 to 21-JUN-17 07:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: WLON

Frequent sustained tropical storm force winds with higher gusts were common across the marine zone. A maximum wind gust of 45 kts, or 52 mph, was measured by the New Canal WLON station (NWCL1) at 11:00pm CST on the 20th. A maximum sustained wind of 38 kts, or 44 mph, was measured at the same time. Similar observations were also recorded by a Weatherflow mesonet site on the Lake Pontchartrain Causeway.

Marine Tropical Storm in MISSISSIPPI SOUND, GULF OF MEXICO
From 20-JUN-17 16:00:00 to 21-JUN-17 07:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: WLON

Frequent sustained tropical storm force winds with higher gusts were common across the marine zone. A maximum wind gust of 48 kts, or 55 mph, was measured by the Petit Bois Island WLON station (PTBM6) at 2:54pm CST on the 20th. A maximum sustained wind of 38 kts, or 44 mph, was measured at the same time. Similar observations were also recorded by the Bay Waveland Yacht Club WLON station (WYCM6), with slightly lower values recorded at the Port of Pascagoula Dock C WLON station (DKCM6).

Marine Tropical Storm in COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND LOUISIANA FROM 20 TO 60 NM, GULF OF MEXICO
From 20-JUN-17 10:00:00 to 21-JUN-17 21:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Occasional sustained winds of tropical storm force with frequent tropical storm force gusts were common across the marine zone. A maximum wind gust of 55 kts, or 63 mph was measured by the Main Pass 289C AWOS at 3:15pm CST on the 20th. The highest sustained wind at the same site was 46 kts, or 53 mph, also at 3:15pm CST on the 20th. It should be noted the anemometer at this site is approximately 115 meters above sea level. Buoy 42040, which has a standard height anemometer, measure a maximum gust of 45 kts, or 52 mph, at 5:40pm CST on the 20th.  The same site measured a maximum sustained wind of 34 kts, or 39 mph, at 2:40pm CST on the 20th.