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Richard B Helgeson Airport, Minnesota

Small airport in Lake County, Minnesota

Air quality

The air at Richard B Helgeson Airport

Index 22, good, led by fine particles. Read at 10 PM from its reporting area, Duluth Area (MN), 43 miles off.

22Good
  • Fine particles (PM2.5)22Good22.6 mi
  • Ozone16Good17 ppb22.6 mi

The days ahead

Good each day through Sun Oct 18, led by ozone. Yesterday measured 22, good.

Smoke, the next 46 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Richard B Helgeson Airport

0.38 in in the last 24 hours, and none in the 2 days before, to Thu 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.38in
Last 3 days
0.38in

Visibility

How far you can see at Richard B Helgeson Airport, the next 46 hours

Visibility stays 6 miles or more through Sat 7 PM, lowest 7 miles Fri 12 AM.

FriSat

Airfield

Code
TWM
ICAO
KTWM
IATA
-
Field elevation
1,073 ft
Serves
Two Harbors
Kind
Small airport
Scheduled service
No
Its own instrument
TWM
Wind now
Calm, read 15 Oct, 22:15

Runways

RunwayLengthWidthSurfaceHeading, trueWind along it nowCrosswind now
06 / 244,400 ft75 ftAsphalt62° / 242°CalmCalm
15 / 33 unlit2,581 ft150 ftGrass143° / 323°CalmCalm
062415331,000 ftN
Runways from their surveyed ends, north up, lengths and positions to scale.

Measured here

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

Every hour from Two Harbors (TWM), Richard B Helgeson Airport's own instrument, measure by measure, on the field's own clock.

Temperature

46 F at 10 PM; 48 F at its warmest, 3 PM, and 45 F at its coolest, 3 AM.

Now
46F
10 PM
Highest
48F
3 PM
Lowest
45F
3 AM
Temperature and Dew point at Two Harbors, temperature from 44.6 to 47.8, the latest 45.5; dew point from 42.5 to 46.9, the latest 45.5, in degrees Fahrenheit.TEMPERATURE AND DEW POINTF42444648Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PMTEMPERATUREDEW POINT

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

Humidity and dew point

A dew point of 46 F, the air 100% saturated; the humidity ran from 86% at 12 AM to 100% at 8 PM.

Dew point now
46F
10 PM
Humidity now
100%
Humidity, range
86 to 100%
Relative humidity at Two Harbors, relative humidity from 86 to 100, the latest 100, in per cent.RELATIVE HUMIDITY%859095100Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

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

Wind

Calm at 10 PM; at its strongest 4 mph, 6 AM, and no gust reported.

Now
0mph
calm
Strongest
4mph
6 AM
Highest gust
-
none reported
Wind at Two Harbors, wind from 0 to 4, the latest 0, in miles an hour.WINDmph01234Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM
Wind direction at Two Harbors, wind direction from 20 to 130, the latest 120, in degrees.WIND DIRECTION°090180270360Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

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

Pressure

29.90 inHg at 10 PM, falling 0.02 inHg over 3 hours; 0.29 inHg lower than a day before.

Now
29.90inHg
10 PM
3 hours
-0.02inHg
falling
24 hours
-0.29inHg
Pressure, altimeter at Two Harbors, pressure, altimeter from 29.90 to 30.21, the latest 29.90, in inches of mercury.PRESSURE, ALTIMETERinHg29.8029.9030.0030.1030.2030.30Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

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

Visibility

Down to 2 miles at 11 AM; 7 miles now.

Now
7mi
Lowest
2mi
11 AM
Hours under a mile
0
Visibility at Two Harbors, visibility from 2.0 to 10.0, the latest 7.0, in miles.VISIBILITYmi02.557.510Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PMLIFRIFRMVFRVFR

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

Cloud base

The lowest cloud base came down to 500 ft at 12 PM; a base was reported in 24 of the hours.

Lowest base now
1,300ft
Lowest in 24 hours
500ft
12 PM
Hours with a base reported
24
Lowest cloud base at Two Harbors, lowest cloud base from 500 to 3,600, the latest 1,300, in feet.LOWEST CLOUD BASEft01,0002,0003,0004,000Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PMLIFRIFRMVFRVFR

How it is measured: Cloud classification, Field Book FB-SKY-001

Precipitation

0.37 in measured in the gauge, the most, 0.07 in, in the hour to 3 PM.

Last 24 hours
0.37in
Wettest hour
0.07in
3 PM
Hours with some
11
Precipitation at Two Harbors, precipitation from 0.00 to 0.07, the latest 0.00, in inches.PRECIPITATIONin0.000.030.050.070.10Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

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

Two Harbors: 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 Richard B Helgeson 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

Two HarborsTWM

At an airfield/0.0 mi away/1,076 ft/3 ft above here

temp, wind, gust, visibility, precip, pressure

Duluth WFODLHM5

At a river or reservoir gauge/26.4 mi away/1,431 ft/358 ft above here

temp, wind, gust, humidity, pressure

measured daily2 instruments

Two Harbors 3.6 WNWMN-LK-4

In a volunteer observer's own ground/0.7 mi away/1,043 ft/30 ft below here

precip, snowfall, snow depth

Two HarborsTOHM5

At a cooperative observer's station/3.8 mi away/623 ft/450 ft below here

snowfall, snow depth, precip, high, low

0in

Snow on the ground

Measured at Two Harbors (TOHM5), 3.8 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Minnesota

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

Near Richard B Helgeson Airport

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

Near Richard B Helgeson Airport