I picked up a weather information card in the Wooler tourist information office.

weather2go, it shows a map of various parts of the country, mainly areas of hills and mountains, you then text a number followed by the code for the area you are interested in. They text back the 24 hour forecast for that area. Never tried it yet, text replies cost 50p.

try this link, but best picking up a card.
http://sniffout.operatelecom.com/1/index.cfm?category=Information%20Services&service=Weather%20Services&servicedirectory=weather2sms&action=register&serviceid=89&forecastid=3&method=audio