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Bay St. Louis, Mississippi

City in Hancock County, Mississippi

Air quality

The air at Bay St. Louis

Index 56, moderate, led by fine particles. Read at 5 AM from its reporting area, Mississippi Gulf Coast (MS), 15 miles off.

56Moderate
  • Fine particles (PM2.5)56Moderate2.8 mi
  • Ozone20Good12 ppb2.8 mi

The days ahead

Good each day through Sun Oct 18, led by ozone. Yesterday measured 56, moderate.

Smoke, the next 44 hours

Little smoke near the ground through Sun 1 AM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Bay St. Louis

None in the last 3 days, to Fri 5 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Bay St. Louis, the next 44 hours

Visibility stays 10 miles or more through Sun 1 AM.

FriSat

On the radar over Bay St. Louis, MississippiReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Bay St. Louis, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now4 instruments

measured daily2 instruments

WavelandWVLM6

At a cooperative observer's station/2.3 mi away/19 ft/11 ft below here

snowfall, snow depth, precip, high, low

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Station report

The weather at Citizen station FW6464, drawn

The nearest instrument reporting now, 10.2 mi from Bay St. Louis, Mississippi. From its report of undefined: 3 of its 4 sheets.

The wind

Calm.

Plan of the wind at Citizen station FW6464, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW6464FIG. C THE WIND AT CITIZEN STATION FW6464PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station FW6464, the windSTATION REPORT · CWOP FW6464TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-FW6464-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 33 ft above sea level, 0 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.89 inHg and the temperature at 58.9 F; the station's altimeter setting of 30.04 inHg means its barometer reads 30.00 inHg; it reports 67.0 F, 8.1 F warmer than standard.

Section from sea level of where Citizen station FW6464 stands in the atmosphere, height to scale: the station 33 feet above sea level with 0 per cent of the air below it; the standard atmosphere's pressure there, 29.89 inches of mercury, and temperature, 58.9 degrees Fahrenheit; the altimeter setting of 30.04 and the station pressure it means, 30.00.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW6464FIG. D WHERE CITIZEN STATION FW6464 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERECITIZEN STATION FW64640 PER CENT OF THE AIR BELOW IT33 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.89 inHgSTANDARD TEMPERATURE HERE58.9 FALTIMETER SETTING, REPORTED30.04 inHgITS BAROMETER READS30.00 inHgTEMPERATURE, REPORTED67.0 FTITLECitizen station FW6464, the columnSTATION REPORT · CWOP FW6464TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-FW6464-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 51 degrees above the horizon at 30.36 N, and the day is 11 h 17 min long. Level ground there takes 77 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station FW6464, angles true: on Oct 16 it stands 51 degrees above the horizon, against 83 at the June solstice, 60 at the equinoxes and 36 at the December solstice; the day is 11 h 17 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW6464FIG. E THE SUN AT CITIZEN STATION FW6464ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 83°EQUINOXES 60°DECEMBER SOLSTICE 36°OCT 16, 51°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 17 MINLEVEL GROUND TAKES 77 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 30.36 N; THE SUN'S DECLINATION -9.1°TITLECitizen station FW6464, the sunSTATION REPORT · CWOP FW6464TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-FW6464-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station FW6464, in 4 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Mississippi

21 places, each with its own forecast and its own instruments.

Near Bay St. Louis

The nearest places, each with its own forecast and the instruments nearest it.

Near Bay St. Louis

River and lake gauges