MesoWest Information for CF100 in MER 99 Griffith Rd OC, CA, United States Of America (site inactive)

The following information is known about CF100. If you think that any information is incorrect, then please follow the instructions for correcting that data item.

It is possible that this page will report a problem where no problem exists. If you believe that this has happened, then please contact me (address at the bottom of this page) and explain clearly why you think this page is in error. Note that any changes that you make may take a few days to show up here, so please give it a week before commenting.

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CF100
FW5661
GW1235
GW2994
GW5235
FW0864
DW4246
DW7479
EW4850
GW4205
DW8205
DW1155
GW1393
FW8380
N6XE
K7FED
KI6IKQ
FW2692
CW9085
FW2000
K6PDT
GW0871
DW0946
CW9927
EW8167
GW5021
FW0579
CW0136
DW3723
N6LED-13
KD7ECD
EW4769
NM6G
EW3117
GW2871
CW1522
CW7794
W6WWH
EW8331
FW7364
CW2060
EW8563
FW5690
EW8204
FW1340
EW5766
EW8213
EW1697
CW2750
GW2334
DW3588
FW1698
WB6AHC-1
FW0228
EW6873
WA5KWK
FW9226
DW9278
CW0234
DW8509
EW9135
GW4969
FW3788
DW2128
DW7171
FW2287
WX6HNX-2
FW9150
EW1869
W6ACT
EW6085
FW2761
FW1198
FW1271
DW2458
GW2040
CW4115
FW0574
EW3976
DW9396
EW7041
FW3098
DW8427
GW3580
WB6DHP
DW7894
W6CX
FW9422
EW1433
GW5230
EW3923
EW8945
CW1792
EW2266
DW9791
GW0049
GW4110
GW1307
DW6358
FW1470
N6MDS
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Registered Location

Latitude: 37° 27' 22" N (deg min sec), 37.4560° (decimal), 3727.36N (LORAN)
Longitude: 120° 48' 16" W (deg min sec), -120.8045° (decimal), 12048.27W (LORAN)
Elevation: 34 metres (113 feet) -- validated against 34 metres (110 feet) from Google
Location: MER 99 Griffith Rd OC, CA, United States Of America
County: Merced, CA
Data provider: CALTRANS
Forecast Office: San Joaquin Valley (HNX)

The site location should be at the mark shown -- or very close. Clicking within the map area (or you can drag the 'CF100' marker) will display the latitude/longitude of that point.

If the displayed location (or elevation) of the weather observing location is incorrect, please drag the marker to the right location (or click in the right location), and then send the updated information. Please note that we are trying to spot either the Stevenson Screen (or equivalent) or the location where the barometric readings are taken.

Can you help with location quality? Please indicate if the marker on the map points at the weather instrument cluster:

The location information for this site was gathered from 1 data source. The source which most closely matches the consensus is chosen. Many of these sources only report the location to the nearest minute (or hundredth of degree). This can lead to the marker being placed noticeably incorrectly. Please see Discussion of Location Errors for more information. Show location history.

There are no photographs of the station. If you have pictures of this location, then please email them to cf100@photo.gladstonefamily.net.

You can try to find photographs from the area surrounding the site marker by clicking on Find nearby photographs. (There may be some)

Data Status

Over the last 3 days, no data was seen on the following dates: 2025-03-10 to 2025-03-11.

Recent observations from this weather station can be downloaded as a CSV file suitable for importing into various spreadsheet programs: last 7 days, last 14 days, last 28 days, last 56 days. This data can also be linked directly from Excel using a Web Query. The main link goes to the page with the data on it, and the IQY link is the Web Query that will access it: last 7 days (IQY: last 7 days), last 14 days (IQY: last 14 days), last 28 days (IQY: last 28 days), last 56 days (IQY: last 56 days).

All the means and standard deviations shown below are from the last 3 days. Change analysis period to Last 7 days  Last 14 days  Last 4 weeks  Last 8 weeks  Last 13 weeks  Last 26 weeks  Last 39 weeks  Last 52 weeks  

By default, the longer analysis periods display graphs that show the long term performance of this station. The graphs show the mean error over time, and include error bars which are one standard deviation long. This provides an easy way to see if there are any underlying trends in the data. Note that a 'step' in your data does not (necessarily) mean that something happened to your station. It could mean that another station came online in the local area, and they are changing the analysis.

The analysis is performed by MADIS. This web page just provides visualization of the data that MADIS produces. There are a number of very knowledgeable people who participate on the WXQC Mailing List who do understand exactly how MADIS works and can resolve issues when the analysis seems to be broken. However, in most cases, the station readings are at fault, or the software that is transmitting the data to CWOP. Please check those paths first.

You can also see how this station compares with other stations.

Neighboring Stations

This is a list of stations that are close to this station. You can look at those for comparison purposes. The average difference between your station and each station below is listed as well. This may allow you to detect local stations which are erroneous. You can also use these numbers to adjust your instruments -- especially if a number of ASOS stations have similar differences to your station. Also, try increasing the analysis period to more than the default 28 days. The difference is only given if both stations report reasonably often during each day. Some stations only report every 6 hours, and this makes the average of less interest. In this case, the average is not displayed. The values reported are the differences between this station and the neighboring station. I.e. if the difference is positive, then this station is reading higher than the neighboring station. Since this station has not been reporting continuously during the analysis period (it missed 2 days out of 3), the offsets below may not be accurate.

You can also subscribe to an RSS feed to tell you when new stations come online in this area. Choose either within 100 miles or 250 miles . For stations covered by your Forecast Office: San Joaquin Valley (HNX) .

SiteDistanceLocationBarometerTemperatureDewpoint
FW566114.8 milesSouthwest Crows Landing, CA, US (lat 37.3352°, long -121.0270°, altitude 29 metres)
GW123517.1 milesSoutheast MERCED, CA, US (lat 37.3250°, long -120.5410°, altitude 50 metres)
GW299419.5 milesSoutheast Merced, CA, US (lat 37.3019°, long -120.5078°, altitude 52 metres)
GW523519.6 milesNorthwest MODESTO, CA, US (lat 37.6782°, long -121.0253°, altitude 26 metres)
FW086420.4 milesSoutheast Merced, CA, US (lat 37.3057°, long -120.4858°, altitude 51 metres)
DW424621.3 milesSoutheast Merced, CA, US (lat 37.3283°, long -120.4520°, altitude 55 metres)
EW485021.6 milesNorth Oakdale, CA, US (lat 37.7652°, long -120.8610°, altitude 46 metres)
GW420522.2 milesNorth OAKDALE, CA, US (lat 37.7755°, long -120.8428°, altitude 48 metres)
DW820525.7 milesSouth Los Banos, CA, US (lat 37.0850°, long -120.8408°, altitude 31 metres)
DW115525.8 milesNorth Knights Ferry, CA, US (lat 37.8255°, long -120.7337°, altitude 120 metres)

Location Formats

The location is shown in three different formats. Each of these is used in some software, and is shown on some websites.

Degrees Minutes Seconds: VWS/VWSAPRS, WeatherLink 5.5, WeatherLink (5.2-5.4), WeatherView (Linux)

Decimal degrees: FreeWX, WeatherView32 (PC application)

LORAN: WeatherDisplay, WUHU, Henriksen WServer

Resources

CWOP Home: This describes the whole CWOP program and has a large amount of useful information.

CWOP Siting Guide (PDF): This is a guide to siting and operating a CWOP station. This is a must-read document.

Another CWOP Guide (PDF): This is another guide to siting and operating a CWOP station. This is a must-read document.

Urban Siting and Operations (PDF): This is a guide to siting and operating a CWOP station in an urban environment.

APRS WX Message format: This describes the actual format of the messages transmitted that carry WX information.

WXQC Mailing List: This is a mailing list where data quality issues are discussed. Assistance with software configuration can often be found here.

Topo Map Reading Guide: How to read USGS topographic maps, with a good section on reading contours.

Geographically nearby web pages: Use Geourl to find web pages that deal with locations geographically close to this site.


Overall website comments, problems etc to Philip Gladstone
Page layout last modified Sunday, 28 February 2016
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