Maintained by: Robert Dunn
Last updated: 14/02/2020 Expires: 14/02/2021
Hosted by: Met Office Hadley Centre
© Crown Copyright
| Met Office Hadley Centre observations datasets |
| > Home > HadISD > 3.4.1.202403p > Online Material > |
Please read the Geoscientific Instrumentation, Methods & Data Systems and Climate of the Past I and II papers before using the material presented here.
The netCDF headers are listed below with some information as to what they contain.
| Field Name | Long Name | Units | |
|---|---|---|---|
| time | Time | Hours since 1-1-1931 00:00UT | |
| input_station_id | Primary source for timestep data | ||
| temperatures | C | ||
| dewpoints | C | ||
| total_cloud_cover | oktas | ||
| low_cloud_cover | oktas | ||
| mid_cloud_cover | oktas | ||
| high_cloud_cover | oktas | ||
| cloud_base | m | ||
| windspeeds | m/s | ||
| winddirs | degree | ||
| wind gust | m/s | ||
| slp | sea-level pressure | hPa | |
| stnlp | station-level pressure | hPa | |
| past_sigwx1 | Past significant weather code | ||
| precip1_depth | Depth of 1-hour precipitation accumulation | mm | |
| precip2_depth | Depth of 2-hour precipitation accumulation | mm | |
| precip3_depth | Depth of 3-hour precipitation accumulation | mm | |
| precip6_depth | Depth of 6-hour precipitation accumulation | mm | |
| precip9_depth | Depth of 9-hour precipitation accumulation | mm | |
| precip12_depth | Depth of 12-hour precipitation accumulation | mm | |
| precip15_depth | Depth of 15-hour precipitation accumulation | mm | |
| precip18_depth | Depth of 18-hour precipitation accumulation | mm | |
| precip24_depth | Depth of 24-hour precipitation accumulation | mm | |
| qc_flags | Quality control flags | ||
| flagged_values | Removed values (T, D, SLP, STNLP, WS, WD, TC, LC, MC, PP1, PP2, PP3, PP6, PP9, PP12, PP15, PP18, PP24) | ||
The homogeneity information is not yet available for this version of HadISD. The homogeneity assessment will only be run at the end of a complete calendar year, so please find the latest in the page for v3.4.0.2023f.
A number of files and plots are linked below which were used or generated when creating HadISD.
| Description | Station Number | Data file | Notes |
|---|---|---|---|
| HadISD Station List | 9678 | hadisd_station_info_v341_202403p.txt | 1 |
| HadISD Station List (with names) | 9678 | hadisd_station_fullinfo_v341_202401p.txt | 1 |
| HadISD Station Additions | 284 | hadisd_station_additions_v341_202401p.txt | |
| HadISD Station Removals | 166 | hadisd_station_removals_v341_202401p.txt | |
| Composite Stations | 2827 | final_mergers.txt | 2 |
| User Identified erroneous data | |||
| Number of stations with a failures from a certain test in percentage bins | all_fails_summary_20240404.dat | 3 | |
| Test 3-letter code descriptor | tests_codes.txt | ||
| Test | Variable | PNG |
|---|---|---|
| Duplicate months | All | png |
| Odd Cluster | Temperatures | png |
| Odd Cluster | Dew Points | png |
| Odd Cluster | SLP | png |
| Odd Cluster | Wind Speed | png |
| Frequent Value Check | Temperature | png |
| Frequent Values | Dew point | png |
| Frequent Values | SLP | png |
| Diurnal Cycle Check | All | png |
| Gap Check | Temperature | png |
| Gap Check | Dew point | png |
| Gap Check | SLP | png |
| Record Check | Temperature | png |
| Record Check | Dew point | png |
| Record Check | SLP | png |
| Record Check | Wind speed | png |
| Day Strings | Temperature | png |
| Day Strings | Dew point | png |
| Day Strings | SLP | png |
| Day Strings | Wind speed | png |
| Straight Strings | Temperature | png |
| Straight Strings | Dew point | png |
| Straight Strings | SLP | png |
| Straight Strings | Wind speed | png |
| Hour Strings | Temperature | png |
| Hour Strings | Dew point | png |
| Hour Strings | SLP | png |
| Hour Strings | Wind speed | png |
| All temperature strings | Temperature | png |
| All dewpoint strings | Dew point | png |
| All SLP strings | SLP | png |
| All wind strings | Wind speed | png |
| Climatological Check | Temperature | png |
| Climatological Check | Dew point | png |
| Climatological Check | SLP | png |
| Spike Check | Temperature | png |
| Spike Check | Dew point | png |
| Spike Check | SLP | png |
| Spike Check | Wind speed | png |
| Supersaturation | Dew point | png |
| Dew point depression | Dew point | png |
| Dew point Cut Off | Dew point | png |
| Variance Check | Temperature | png |
| Variance Check | Dew point | png |
| Variance Checks | SLP | png |
| Variance Checks | Wind speed | png |
| Logical Check | Wind speed | png |
| Wind Rose | Wind speed | png |
| Cloud Total | Low,Mid,High,Total | png |
| Unobservable | High Cloud | png |
| Unobservable | Low Cloud | png |
| Unobservable | Mid Cloud | png |
| Unobservable | Total Cloud | png |
| Full Low cloud check | Mid & High Cloud | png |
| Full Mid cloud check | High Cloud | png |
| Negative cloud value | All Cloud | png |
| Precipitation | Precipitation | png |
| Pressure Cross Check | Station Level Pressure | png |
| Neighbour Outlier | Temperature | png |
| Neighbour Outlier | Dew point | png |
| Neighbour Outlier | SLP | png |
| Month cleared | Temperature | png |
| Month cleared | Dew point | png |
| Month cleared | SLP | png |
| Month Cleared | Wind Speed | png |
| Month cleared | Wind Direction | png |
| Month cleared | Total cloud | png |
| Month cleared | High Cloud | png |
| Month cleared | Mid Cloud | png |
| Month cleared | Low Cloud | png |
| Month cleared | Cloud Base | png |
| All | Temperature | png |
| All | Dew point | png |
| All | SLP | png |
| All | Cloud | png |
|
Maintained by: Robert Dunn |
© Crown Copyright |