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Halchita, Utah

Community in San Juan County, Utah

Air quality

The air at Halchita

Index 12, good, led by ozone. Read at 1 AM from its reporting area, Four Corners Area (CO), 70 miles off.

12Good
  • Fine particles (PM2.5)6Good-
  • Ozone12Good-
  • Coarse particles (PM10)3Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 10, good.

Smoke, the next 41 hours

Little smoke near the ground through Sat 6 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Halchita

None in the last 24 hours; 0.19 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.19in

Visibility

How far you can see at Halchita, the next 41 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Halchita, UtahReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Halchita, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.0 miles away.

measured now4 instruments

Mccracken MesaS2140

At a soil climate station/37.5 mi away/5,315 ft/936 ft above here

temp, humidity, soil temp, soil moisture

Rank497of 998

BlandingBDG

At an airfield/38.7 mi away/5,821 ft/1,442 ft above here

temp, wind, gust, visibility, precip, pressure

Rank643of 998

measured daily2 instruments

Bluff 0.5 NNEUT-SJ-11

In a volunteer observer's own ground/21.0 mi away/4,409 ft/30 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at San Juan River 20 SW Bluff, drawn

The nearest instrument reporting now, 2.0 mi from Halchita, Utah. From its report of Oct 16, 2026, 1:30 AM local time: 3 of its 4 sheets.

The air

50.7 F with a dew point of 43.1 F, 75 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up.

Chart of the air at San Juan River 20 SW Bluff: temperature 50.7 degrees Fahrenheit and dew point 43.1, 75 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BFFU1FIG. B THE AIR AT SAN JUAN RIVER 20 SW BLUFFTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 1,800 FT ABOVE THE STATION, AT 41.4 FTEMPERATURE 50.7 FDEW POINT 43.1 FSPREAD 7.6 FRELATIVE HUMIDITY 75 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 POINTTITLESan Juan River 20 SW Bluff, the airSTATION REPORT · DCP BFFU1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-BFFU1-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 4,131 ft above sea level, 14 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 25.72 inHg and the temperature at 44.3 F; it reports 50.7 F, 6.5 F warmer than standard.

Section from sea level of where San Juan River 20 SW Bluff stands in the atmosphere, height to scale: the station 4,131 feet above sea level with 14 per cent of the air below it; the standard atmosphere's pressure there, 25.72 inches of mercury, and temperature, 44.3 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BFFU1FIG. D WHERE SAN JUAN RIVER 20 SW BLUFF 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 ATMOSPHERESAN JUAN RIVER 20 SW BLUFF14 PER CENT OF THE AIR BELOW IT4,131 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 HERE25.72 inHgSTANDARD TEMPERATURE HERE44.3 FTEMPERATURE, REPORTED50.7 FTITLESan Juan River 20 SW Bluff, the columnSTATION REPORT · DCP BFFU1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-BFFU1-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 44 degrees above the horizon at 37.15 N, and the day is 11 h 04 min long. Level ground there takes 69 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at San Juan River 20 SW Bluff, angles true: on Oct 16 it stands 44 degrees above the horizon, against 76 at the June solstice, 53 at the equinoxes and 29 at the December solstice; the day is 11 h 04 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BFFU1FIG. E THE SUN AT SAN JUAN RIVER 20 SW BLUFFELEVATION 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 53°DECEMBER SOLSTICE 29°OCT 16, 44°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 04 MINLEVEL GROUND TAKES 69 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 37.15 N; THE SUN'S DECLINATION -9.1°TITLESan Juan River 20 SW Bluff, the sunSTATION REPORT · DCP BFFU1TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-BFFU1-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of San Juan River 20 SW Bluff, in 4 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Mexican Hat 10NNW (MXHU1), 10.1 miles from here, read 15 Oct, 18:00. measured daily

Elsewhere in Utah

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

Near Halchita

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

Near Halchita

River and lake gauges