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Tracy Municipal Airport, California

Small airport in San Joaquin County, California

Air quality

The air at Tracy Municipal Airport

Index 37, good, led by ozone. Read at 2 PM from its reporting area, Livermore (CA), 18 miles off.

37Good
  • Fine particles (PM2.5)10Good-
  • Ozone37Good53 ppb24.5 mi
  • Nitrogen dioxide2Good2.2 ppb24.5 mi
  • Sulfur dioxide1Good1.2 ppb24.5 mi
  • Carbon monoxide-0.3 ppm24.5 mi

The days ahead

Highest 58, moderate, Sat Oct 17, led by ozone. Yesterday measured 45, good.

Smoke, the next 45 hours

Little smoke near the ground through Sun 11 AM: the index from smoke stays at 6 or under.

FriSatSun

Precipitation

What has fallen at Tracy Municipal Airport

None in the last 3 days, to Fri 2 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 Tracy Municipal Airport, the next 45 hours

Visibility stays 10 miles or more through Sun 11 AM.

FriSatSun

Airfield

Code
TCY
ICAO
KTCY
IATA
-
Field elevation
193 ft
Serves
Tracy
Kind
Small airport
Scheduled service
No
Its own instrument
TCY
Wind now
From 100° at 8 mph, read 16 Oct, 14:35

Runways

RunwayLengthWidthSurfaceHeading, trueWind along it nowCrosswind now
08 / 26 unlit3,438 ft75 ftAsphalt89° / 269°8 mph head, on 082 mph from the right
12 / 304,001 ft75 ftAsphalt132° / 312°7 mph head, on 124 mph from the left
082612301,000 ftN100° 8 mph
Runways from their surveyed ends, north up, lengths and positions to scale; the rose in the corner is the wind now.

Measured here

What the airfield's own instrument measured, the last 24 hours

Every hour from Tracy (TCY), Tracy Municipal Airport's own instrument, measure by measure, on the field's own clock.

Temperature

85 F at 2 PM; 85 F at its warmest, 2 PM, and 57 F at its coolest, 5 AM.

Now
85F
2 PM
Highest
85F
2 PM
Lowest
57F
5 AM
Temperature and Dew point at Tracy, temperature from 57.2 to 84.8, the latest 84.8; dew point from 30.2 to 39.8, the latest 39.8, in degrees Fahrenheit.TEMPERATURE AND DEW POINTF204060801006 PM9 PMOct 163 AM6 AM9 AM12 PM3 PMFREEZINGTEMPERATUREDEW POINT

How it is measured: Stevenson screen and siting, Field Book FB-INS-009

Humidity and dew point

A dew point of 40 F, the air 20% saturated; the humidity ran from 16% at 12 PM to 50% at 5 AM.

Dew point now
40F
2 PM
Humidity now
20%
Humidity, range
16 to 50%
Relative humidity at Tracy, relative humidity from 16 to 50, the latest 20, in per cent.RELATIVE HUMIDITY%10203040506 PM9 PMOct 163 AM6 AM9 AM12 PM3 PM

How it is measured: Humidity variables, Field Book FB-WAT-002

Wind

9 mph from the east southeast at 2 PM; at its strongest 11 mph, 9 AM, with a gust of 17 mph at 7 AM.

Now
9mph
from the east southeast
Strongest
11mph
9 AM
Highest gust
17mph
7 AM
Wind and Gust at Tracy, wind from 0 to 11, the latest 9; gust from 15 to 17, the latest 15, in miles an hour.WIND AND GUSTmph051015206 PM9 PMOct 163 AM6 AM9 AM12 PM3 PMWINDGUST
Wind direction at Tracy, wind direction from 10 to 360, the latest 120, in degrees.WIND DIRECTION°0901802703606 PM9 PMOct 163 AM6 AM9 AM12 PM3 PM

How it is measured: Coriolis as geometry, Field Book FB-ENG-008

Pressure

30.04 inHg at 2 PM, falling 0.05 inHg over 3 hours; 0.01 inHg lower than a day before.

Now
30.04inHg
2 PM
3 hours
-0.05inHg
falling
24 hours
-0.01inHg
Pressure, altimeter at Tracy, pressure, altimeter from 30.04 to 30.10, the latest 30.04, in inches of mercury.PRESSURE, ALTIMETERinHg30.0430.0630.0830.106 PM9 PMOct 163 AM6 AM9 AM12 PM3 PM

How it is measured: Hydrostatic balance, Field Book FB-ENG-003

Visibility

Down to 4 miles at 7 AM; 10 miles or more now.

Now
10+mi
Lowest
4mi
7 AM
Hours under a mile
0
Visibility at Tracy, visibility from 4.0 to 10.0, the latest 10.0, in miles.VISIBILITYmi02.557.5106 PM9 PMOct 163 AM6 AM9 AM12 PM3 PMLIFRIFRMVFRVFR

How it is measured: Fog types, Field Book FB-WAT-020

Precipitation

None measured in the gauge in the last 24 hours.

Last 24 hours
0.00in
Wettest hour
-
Hours with some
0

How it is measured: ASOS, Field Book FB-INS-002

Tracy: every reading, the last 7 days, 30 days and the year, and how well it reports

What is measuring near here

The 5 instruments nearest Tracy Municipal Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.0 miles away.

measured now3 instruments

TracyTCY

At an airfield/0.0 mi away/185 ft/8 ft below here

temp, wind, gust, visibility, precip, pressure

I-580 - West of SR-132CF123

Beside a road/2.9 mi away/278 ft/85 ft above here

temp, pavement temp, wind, visibility, precip

AltamontAATC1

At a river or reservoir gauge/9.2 mi away/1,450 ft/1,257 ft above here

temp, wind, gust, humidity, pressure

measured daily2 instruments

Tracy 1.1 SSWCA-SJ-14

In a volunteer observer's own ground/2.4 mi away/78 ft/115 ft below here

precip, snowfall, snow depth

Tracy Pumping PlantTRPC1

At a cooperative observer's station/10.7 mi away/56 ft/137 ft below here

snowfall, snow depth, precip, high, low

-

Snow on the ground

Elsewhere in California

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

Near Tracy Municipal Airport

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

Near Tracy Municipal Airport