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| Dave Clarke | "Everywhere you go, you always take the weather with you" - Crowded House | | |
| Dave Clarke | "That's the weather, for now" - Darren Bett | | |
| Dave Clarke | "She makes me think of lightning in skies" - N.E.R.D 2004 | | |
| Sam Jowett | CAPE = Convective Available Potential Energy - energy available for free convection measured in joules per kilogram (j/kg) | | |
| Sam Jowett | LI = Lifted Index - the temperature difference in ºC between a parcel of air lifted to a level (commonly 500hpa/6km) and the actual environmental air; a negative value indcates instability at that level | | |
| Sam Jowett | PVA = Positive Vorticity Advection - generates lift | | |
| Sam Jowett | WAA = Warm Air Advection - air from a warm source blowing over cooler surface air and being lifted | | |
| Sam Jowett | NVA = Negative Vorticity Advection - surpresses lift | | |
| Sam Jowett | CAA = Cold Air Advection - air from a cold source beneath warmer surface air and generating lift | | |
| Sam Jowett | Td = Dewpoint - the temperature at which water vapour in an airmass will condense into dew | | |
| Sam Jowett | Tw = Wet Bulb Temperature - the temperature of a wet surface cooled by evaporation | | |
| Sam Jowett | CG = Cloud to Ground lightning strike | | |
| Sam Jowett | CC = Cloud to Cloud lightning strike i.e. between clouds | | |
| Sam Jowett | IC = Intra Cloud lightning strike i.e. within a cloud | | |
| Sam Jowett | WBFL = Wet Bulb Freezing Level - the height that the temperature of a wet surface is freezing; prevents thawing of ice | | |
| Sam Jowett | Cu = Cumulus - low level convective cloud | | |
| Sam Jowett | Cb = Cumulonimbus - deep convective cloud, commonly thunderstorms | | |
| Sam Jowett | St = Stratus - low level layered cloud | | |
| Sam Jowett | As = Altostratus - mid level layered cloud | | |
| Sam Jowett | Ac = Altocumulus - mid level convective cloud | | |
| Sam Jowett | Cs = Cirrostratus - high level layered cloud | | |
| Sam Jowett | Ci = Cirrus - high level whispy cloud | | |
| Sam Jowett | Cc = Cirrocumulus - high level convective cloud | | |
| Sam Jowett | Ns = Nimbostratus - deep layered cloud, commonly associated with fronts | | |
| Sam Jowett | DVA = Differential Vorticity Advection - opposing winds at different heights generating lift | | |
| Sam Jowett | ELR = Environmental Lapse Rate - the actual temperature profile as you go up from the surface | | |
| Sam Jowett | DALR = Dry Adiabatic Lapse Rate - how the temperature of an unsaturated parcel of air falls with height, due to decreasing pressure; around 9.8ºC per 1000m | | |
| Sam Jowett | SALR = Saturated Adiabatic Lapse Rate - how the temperature of an saturated parcel of air falls with height, due to decreasing pressure; between 3ºC per 1000m and 9.8ºC per 1000m according to the moisture content of the air | | |
| Sam Jowett | Mixing Ratio = the amount of water in the air, measured as grammes of water per kilogram of air | | |
| Sam Jowett | Relative Humidity = the percentage of water contained in the air air, relative to the maximum that can be contained at the current temperature. At higher temperatures the air can hold more water and it's more difficult to acheive a high relative humidity. | | |
| Sam Jowett | TN = Tornado - a violently rotating column of air attached to a cloud and producing surface effects | | |
| Sam Jowett | FC = Funnel Cloud - a violently rotating column of air attached to a cloud NOT producing surface effects | | |
| Sam Jowett | WS = Waterspout - A tornado over water | | |
| Sam Jowett | LD = Land Devil (also water devel, dust devil, fire devil etc) - a rotating column of air NOT attached to a cloud, but strong enough to lift swirling debris | | |
| Sam Jowett | Gustnado = an eddy whirlwind produced by swirling air along a gust front | | |
| Sam Jowett | Landspout = unnoficial term for a weak tornado | | |
| Sam Jowett | Mini-tornado = arrrggggghhhhhh!!! There's no such thing!... only weak tornadoes! | | |
| Sam Jowett | FZ = Freezing Rain - Supercooled droplets of rain that freeze on contact with any surface | | |
| Sam Jowett | RA = Rain - falling droplets of water | | |
| Sam Jowett | SN = Snow - crystallised ice forming flakes | | |
| Sam Jowett | GR = Hail - frozen water that circulates in a cloud allowing freeze thaw cycles that allow the ball of ice to grow | | |
| Sam Jowett | GS = Small Hail / Soft Hail / Graupel - hail formed under freezing conditions where little thawing takes place, covers a variety of heavier falling ice particles that aren't snow | | |
| Sam Jowett | DZ = Drizzle - tiny droplets of rain | | |
| Sam Jowett | ATM = At The Moment | | |
| Sam Jowett | AFAIK = As Far As I Know | | |
| Sam Jowett | LOL = Laugh Out Loud | | |
| Sam Jowett | ROFL = Rolling On Floor Laughing | | |
| Sam Jowett | LMAO = Laughing My A*** Off | | |
| Sam Jowett | PMSL = P*** MySelf Laughing | | |
| Dave Clarke | IMHO = In my humble opinion | | |
| Dave Clarke | PPN = precipitation, be it rain, snow or hail variants | | |
| Sam Jowett | Singlecell / Pulse Storm = A short lived thunderstorm with an updraught that becomes swamped by the downdraught produced by the precipitation | | |
| Sam Jowett | Multicell Storm = Long lived potentially severe thunderstorm, produced where wind shear makes the updraught lean so that the downdraught produced by precipitation doesn't swamp it. Daughter cells grow on the inflow side of the storm and succesively take over as the most active part. | | |
| Sam Jowett | Supercell Storm = Long lived often severe thunderstorm, produced where wind shear tilts the updraught, preventing it from being swamped by the downdraught, as well as producing persistent rotation. | | |
| Sam Jowett | MESO = Mesocyclone - a rotating portion of a convective cloud produced by wind shear. | | |
| Sam Jowett | Wall Cloud = a basically circular lowered base beneath a storm that rotates. Demonstrates the presence of a mesocyclone and potential for a funnel cloud or tornado | | |
| Sam Jowett | Flanking Line = connected convection on the inflow side of multicell and supercell storms, where daughter cells either feed into the updraught of a storm, or become a deep updraught in their own right | | |
| Sam Jowett | Beavers Tail = a tail of cloud feeding into the wall cloud of a mesocyclone on the inflow side of the updraught | | |
| Sam Jowett | Cyclogenisis = intensification of a depression | | |
| Sam Jowett | RACY = RApid CYclogenisis - rapid intensification of a depression causing pressure to lower by at least 12mb in 24 hours | | |
| Sam Jowett | Bomb = Very rapid intensification of a depression causing pressure to lower by at least 24mb in 24 hours | | |
| Sam Jowett | Baroclinic Leaf = a cloud feature generated by cyclogenisis and demonstrated on satellite imagery by an area of cold cloud tops, on the left of a depression, viewed from the direction of movement. A dry slot commonly seperates them from the right of the depression. | | |
| Sam Jowett | TS = Tropical Storm - a convectively driven barotropic depression with wind speeds between 34 and 63 knots | | |
| Sam Jowett | TD = Tropical Depression - a convectively driven barotropic depression with wind speeds below 34 knots | | |
| Sam Jowett | Hurricane = a convectively driven, deep barotropic depression with wind speeds in excess of 63 knots | | |
| Sam Jowett | Typhoon = a convectively driven, deep barotropic depression with wind speeds in excess of 63 knots | | |
| Sam Jowett | Barotropic = a single airmass, often associated with tropical circulations | | |
| Sam Jowett | Baroclinic = more than one airmass, often associated with the boundary within mid-latitude depressions seperating air of tropical / polar origin | | |
| Dave Clarke | Propagation = Description of the process of multicellular storm generation | | |
| Dave Clarke | Frouk = Friend Of UKweatherworld - For a small fee of £10 get access to a private members only forum | | |
| Uskys | Bishop's Ring : Around the Sun 10°-20°r , Occasionally visible as a reddish brown ring on a clear day | | |
| Uskys | Isohel : A line joining places having equal sunshine | | |
| Uskys | Isotherm - A line joining places having equal temperature | | |
| Uskys | ITCZ - International Convergence Zone ( otherwise known as the Doldrums ) | | |
| Uskys | Anabatic Wind - The air at the bottom of the valley is warmed by conduction from the heated land during the day. This air being less dense than air above it takes the easiest course to the top of the valley by following the warm sides | | |
| Uskys | Cyclostrophic Force - An outward force from the centre of a High or Low pressure | | |
| Nigel Bolton | Power Station Snow - A localised fall of fine snow from shallow Stratus and Stratocumulus that has been seeded by moisture or condensation nucleii emitted by power stations and other heat generating industries. | | |
| Dave W | +RASN -heavy rain and snow | | |
| Dave W | -TSGR Light thunderstorm with hail | | |
| Dave W | VCSH -Shower in the vicinity | | |
| Dave W | FZFG -freezing fog | | |
| Dave W | NSC - no significant cloud (in a metar) | | |
| Sam Jowett | DMC = Deep Moist Convection, associated with thunderstorms | | |
| Sam Jowett | BLRC = Boundary Layer Rooted Convection - convection generated by the surface of the land, as opposed to that generated above the surface | | |
| Sam Jowett | EML = Elevated Mixed Layer - a layer of unstable air of tropical origin above the boundary layer, commonly responsible for the development of high based storms from Altocumulus Castellanus | | |
| Sam Jowett | Ac cas = Altocumulus Castellanus - mid level convective cloud of turreted form that shows the presence of mid level instability | | |
| Sam Jowett | NAD = North Atlantic Drift - an ocean current which is a spur from the Gulf Stream passing the UK and Iceland; responsible for imported warmth across NW Europe | | |
| Sam Jowett | THC = ThermoHaline Conveyer - a global ocean current driver by heat and salinity, responsible for generating the Gulf Stream | | |
| Sam Jowett | NADW = North Atlantic Deep Water - the driver of the thermohaline conveyer and gulf stream; cold saline water sinks in the North Atlantic and flows S at the sea bed, forcing the surface waters to be replaced by warmer waters to the S | | |
| Sam Jowett | GS = Gulf Stream - The ocean surface current driven by the thermohaline conveyer which is most prevelant just off the E seaboard of the SE US before pushing ENE towards Iberia | | |
| Sam Jowett | SST = Sea Surface Temperature | | |
| P.K. | RSMC - Regional Specialised Meteorological Centre | | |
| P.K. | TCWC - Tropical Cyclone Warning Centre | | |
| P.K. | RSMC Miami - Tropical cyclone forecasters for the Caribbean Sea, Gulf of Mexico, North Atlantic and North East Pacific Oceans | | |
| P.K. | RSMC Honolulu - Tropical cyclone forecasters for the central North Pacific Ocean. | | |
| P.K. | RSMC Tokyo - Tropical cyclone forecasters for the North West Pacific Ocean and South China Sea | | |
| P.K. | RSMC New Delhi - Tropical cyclone forecasters for the Arabian Sea and Bay of Bengal | | |
| P.K. | RSMC La Reunion - Tropical cyclone forecasters for the SW Indian Ocean | | |
| P.K. | RSMC Nadi - Tropical cyclone forecasters for the SW Pacific Ocean | | |
| P.K. | TCWC Wellington - Tropical cyclone forecasters for the Tasman Sea | | |
| P.K. | TCWC Perth - Tropical cyclone forecasters for the SE Indian Ocean south of 10S | | |
| P.K. | TCWC Darwin - Tropical cyclone forecasters for the Arafura Sea and Gulf of Carpenteria | | |
| P.K. | TCWC Brisbane - Tropical cyclone forecasters for the Coral Sea and Gulf of Carpenteria | | |
| P.K. | TCWC Port Moresby - Tropical cyclone forecasters for the Gulf of Papua and Solomon Sea | | |
| Dave Clarke | Send your mobile phone videos to 0214140959@mms.youtube.com | | |
| Dave Clarke | SfLoc = Sferic location - lightning strike location | | |
| Convective North | TCWC Jakarta - Tropical cyclone forecasters for the SE Indian Ocean north of 10S | | |
