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El Portal, California

Community in Mariposa County, California

Air quality

The air at El Portal

Index 66, moderate, led by fine particles. Read at 9 PM from its reporting area, Yosemite National Park (CA), 6 miles off.

66Moderate
  • Fine particles (PM2.5)66Moderate-
  • Ozone43Good-

The days ahead

Yesterday measured 60, moderate.

Smoke, the next 44 hours

No smoke near the ground through Sat 5 PM.

FriSat

Precipitation

What has fallen at El Portal

None in the last 3 days, to Thu 9 PM. 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 El Portal, the next 44 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

On the radar over El Portal, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest El Portal, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.7 miles away.

measured now3 instruments

measured daily2 instruments

Mariposa 7.1 ECA-MP-9

In a volunteer observer's own ground/11.8 mi away/3,210 ft/783 ft above here

precip, snowfall, snow depth

Rank-

Yosemite Park HeadquartersYPQC1

At a cooperative observer's station/12.7 mi away/4,029 ft/1,602 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at El Portal WTP, drawn

The nearest instrument reporting now, 0.7 mi from El Portal, California. From its report of Oct 15, 2026, 9:35 PM local time: 3 of its 4 sheets.

The air

63.5 F with a dew point of 26.1 F, 24 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 8,400 ft up.

Chart of the air at El Portal WTP: temperature 63.5 degrees Fahrenheit and dew point 26.1, 24 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 8,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XODC1FIG. B THE AIR AT EL PORTAL WTPTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00010 F20 F30 F40 F50 F60 F70 FSATURATES 8,400 FT ABOVE THE STATION, AT 18.6 FTEMPERATURE 63.5 FDEW POINT 26.1 FSPREAD 37.5 FRELATIVE HUMIDITY 24 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 POINTTITLEEl Portal WTP, the airSTATION REPORT · DCP XODC1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-XODC1-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 1,707 ft above sea level, 6 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.12 inHg and the temperature at 52.9 F; it reports 63.5 F, 10.6 F warmer than standard.

Section from sea level of where El Portal WTP stands in the atmosphere, height to scale: the station 1,707 feet above sea level with 6 per cent of the air below it; the standard atmosphere's pressure there, 28.12 inches of mercury, and temperature, 52.9 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XODC1FIG. D WHERE EL PORTAL WTP 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 ATMOSPHEREEL PORTAL WTP6 PER CENT OF THE AIR BELOW IT1,707 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 HERE28.12 inHgSTANDARD TEMPERATURE HERE52.9 FTEMPERATURE, REPORTED63.5 FTITLEEl Portal WTP, the columnSTATION REPORT · DCP XODC1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-XODC1-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 43 degrees above the horizon at 37.67 N, and the day is 11 h 03 min long. Level ground there takes 68 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at El Portal WTP, angles true: on Oct 16 it stands 43 degrees above the horizon, against 76 at the June solstice, 52 at the equinoxes and 29 at the December solstice; the day is 11 h 03 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XODC1FIG. E THE SUN AT EL PORTAL WTPELEVATION 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 76°EQUINOXES 52°DECEMBER SOLSTICE 29°OCT 16, 43°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 03 MINLEVEL GROUND TAKES 68 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 37.67 N; THE SUN'S DECLINATION -9.1°TITLEEl Portal WTP, the sunSTATION REPORT · DCP XODC1TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-XODC1-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of El Portal WTP, in 4 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in California

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

Near El Portal

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

Near El Portal

River and lake gauges