Storm Station
Sign in

Union, Louisiana

Community in St. James Parish, Louisiana

Air quality

The air at Union

Index 29, good, led by fine particles. Read at 5 AM from its reporting area, Thibodaux (LA), 23 miles off.

29Good
  • Fine particles (PM2.5)29Good17.1 mi
  • Ozone24Good20 ppb7.7 mi
  • Nitrogen dioxide2Good2.2 ppb11 mi

The days ahead

Good each day through Sun Oct 18, led by ozone. Yesterday measured 54, moderate.

Smoke, the next 44 hours

Little smoke near the ground through Mon 1 AM: the index from smoke stays at 11 or under.

SatSun

Precipitation

What has fallen at Union

None in the last 3 days, to Sat 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 Union, the next 44 hours

Visibility stays 10 miles or more through Mon 1 AM.

SatSun

On the radar over Union, LouisianaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Union, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.7 miles away.

measured now3 instruments

GonzaleREG

At an airfield/6.4 mi away/26 ft/7 ft above here

temp, wind, gust, visibility, precip, pressure

Rank139of 934

measured daily2 instruments

FSA-Donaldsonville 3.7 ELA-SJ-4

In a volunteer observer's own ground/2.5 mi away/15 ft/4 ft below here

precip, snowfall, snow depth

Rank-

DonaldsonvilleDVLL1

At a cooperative observer's station/7.9 mi away/30 ft/11 ft above here

snowfall, snow depth, precip, high, low

Rank13of 934

Station report

The weather at Gonzale, drawn

The nearest airport reporting now, 6.4 mi from Union, Louisiana. From its report of Oct 17, 2026, 6:15 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Gonzale, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT REGFIG. A THE SKY OVER GONZALESECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEGonzale, the skySTATION REPORT · ASOS REGTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-REG-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

55.4 F with a dew point of 40.0 F, 56 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,500 ft up.

Chart of the air at Gonzale: temperature 55.4 degrees Fahrenheit and dew point 40.0, 56 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT REGFIG. B THE AIR AT GONZALETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00030 F40 F50 F60 F70 FSATURATES 3,500 FT ABOVE THE STATION, AT 36.7 FTEMPERATURE 55.4 FDEW POINT 40.0 FSPREAD 15.4 FRELATIVE HUMIDITY 56 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEGonzale, the airSTATION REPORT · ASOS REGTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-REG-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (360 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 30 mph.

Plan of the wind at Gonzale, north up: blowing from 360 degrees, the north, at 10 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT REGFIG. C THE WIND AT GONZALEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 360°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGonzale, the windSTATION REPORT · ASOS REGTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-REG-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Gonzale, in 6 sheets, each beside the Field Book plates that explain it

-

Snow on the ground

Elsewhere in Louisiana

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

Near Union

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

Near Union

River and lake gauges