Current Data Help
The left column gives you each city's station identifier. Just click on one to take you to that city's hourly observations for the
current month. The middle column gives the city in which the
station is located. The last column gives the location of the
station with in the city.
Current Hourly Reports
NOTE: -99ºF in the data means the
data is omitted or unavailable.
Time Column
The time is in GMT which means Greenwich Mean
Time. This is the time in
Greenwich England. This does
not account for daylight savings time so remember, in the winter you need to
subtract 5 hours from GMT to get Eastern Standard Time, but in the summer
only subtract 4 hours to get Eastern Daylight Savings. Note
that this column is NOT in military time.
VIS Column
The visibility
is in miles.
PRESS Column
Pressure is in
millibars.
TMP, DEW, MX6, MN6 Columns
Temperature, dew point, max temperature in past 6hrs, and min temperature in past 6hrs are in
degrees Fahrenheit.
RH Column
The relative humidity is a expressed as a percent since it is an expression of the current amount of moisture at a given pressure and temperature compared with a saturation value. The difference between the temperature and dewpoint is a measure of the relative humidity. The relative humidity is commonly at a maximum when the temperature is at a minimum (dawn) and at a minimum when the temperature is at a maximum (mid-afternoon). The relative humidity is relative to both the temperature and the amount of moisture in the air. When either or both change, so does the relative humidity.
DIR Column
This
column represents the wind direction and the values are in degrees. The
directions are as follows:
0 or 360
= North; 90 = east; 180 = south; 270 = west.
SPE, GST Column
Wind speed and
gusts are in knots.
24hRa Column
24 hour
rainfall is in inches and is for the past 24 hours.
WEATHER Column Qualifier
Intensity or Proximity: - = Light "no sign" = Moderate + = Heavy
Vicinity (VC): but not at aerodrome; in U.S.
METAR, between 5 and 10SM of the point(s) of observation; in U.S.
TAF, 5 to 10SM from center of runway complex(elsewhere within 8000m).
| Descriptor | Precipitation Type | Obscuration | Other |
| MI shallow
|
DZ Drizzle |
BR Mist(>= 5/8SM) |
SQ Squall |
| FZ Freezing |
RA Rain |
FG
Fog(< 5/8SM) |
SS
Sandstorm |
| BC Patches |
SN Snow |
FU
Smoke |
DS Dust Storm |
| PR Partial |
SG Snow grains |
VA Volcanic Ash |
PO Well developed dust/sand
whirls |
| TS Thunderstorm |
IC Ice crystals |
SA
Sand |
FC Funnel cloud |
| BL Blowing |
PL Ice pellets> |
HZ Haze |
+FC tornado/waterspout |
| Showers |
GR Hail |
PY Spray |
|
| DR Drifting |
GS Small hail/snow pellets |
DU Widespread dust |
|
|
UP Unknown precipitation in
automated observations |
|
|
CLOUDS Column
The dome of the sky is divided into eighths (octas), like a pie, to determine the percent of the sky covered by clouds.: CLR (In
automated METAR reports only, no clouds detected below 12000 feet.);
SKy
Clear 0/8;
FEW 1/8-2/8;
SCa
Ttered
3/8-4/8;
Bro
Ke
N 5/8-7/8;
OVer
Cast
8/8; There is 3 digit number designated for the height of the cloud above ground level (AGL). These are expressed in hundreds of feet (ex. 300 would be 30,000). If present specific clouds are reported and followed by
Towering
CUmulus or
Cumulonim
Bus if present.
For an observed sky:
Vertical
Visibility followed by
vertical visibility in hundreds of feet into the obscuration, example:
VV004.
More than 1 layer may be reported.
REMARKS Column
PK
WND 28045/15 (peak wind from
280 at 45kt at 15 past the hour)
A01: Automated station that cannot tell the difference between rain and
snow
A02: Automated station that can tell the difference between rain and snow
VIS 1V2 (visibility varying from 1SM to 2SM)
CB DSNT S (Cumulonimbus distant south)
GRB17E40 TSB15 TS OHD MOV E GR 3/4 (Hail began 17 past hour, ended 40
past hour. Thunderstorm began 15 past hour. Thunderstorm overhead moving east.
Hail 3/4")
OCNL LGTCGICCC (Occasional lightning cloud to ground, in cloud, cloud to
cloud)
OCNL: Occasional
FRQ: Frequent
CONS: Continuous
CG: Cloud-to-ground
IC: In-cloud
CC: Cloud-to-cloud
WSHFT 30 FROPA (Wind shift at 30 past the hour due to frontal passage)
TWR VIS 1 (Tower visibility 1 SM)
FG FEW000 (Fog obscuring one to two eighths of the sky)
EXAMPLE 1: A02 SNE21B53 SLP058 T10281039 A02 says the ASOS
can distinguish between rain and snow. Snow ended at 21 past the hour and began
again at 53 past the hour. Sea level pressure is 1005.8 mb. Detailed temperature
of minus 2.8 Celsius and dewpoint of minus 3.9 Celsius.
EXAMPLE 2: A02 RAB08E18 SLP095 CB AND SH DSNT N-NE
MOV NE T01000028
A02 says the ASOS can distinguish between rain and snow.
Rain began at 8 minutes past the hour and ended 18 minutes past the hour. Sea
level pressure is 1009.5 mb. Cumulonimbus and showers to the distant north
through northeast moving northeast. Detailed temperature of 10.0 Celsius and
dewpoint of 2.8 Celsius.
Current Daily Data
Provides the daily maximum temperature, minimum temperature,
average temperature, Heating & Cooling Degree Days, Growing Degree Days,
Average Dewpoint, Average Relative Humidity, Average Wind Speed (knots), Average
Wind Direction, Average Pressure (millibars), and the Total Precipitation
(inches). All temperatures are in degrees Fahrenheit. M means the data is missing for that particular day.
Current vs Climatology Graphs
Click the dot next to your city and submit for graphs comparing this month's
maximum, minimum, and average Temps against the normal and record max, min and
average.
