The low had moved ne to be in the bay of biscay
tightening isobars
across the s uk.
At 0900 gmt pressure here was 1018 mb and with
slack isobars
there was little or no wind, what there was was s'ly.
Isobar chart.
Too many low pressure systems with closely
packed isobars
are stubbornly sitting in our path.
Second is the pressure chart
showing the isobars
in the south atlantic.
The word usage examples above have been gathered from various sources to reflect current and historical usage.
They do not represent the opinions of YourDictionary.com.