WEATHER FRONTS AND PRESSURE SYSTEMS
WEATHER FRONTS ANDPRESSURE SYSTEMS
AIR MASSESo LARGE VOLUME OF AIR IN WHICH TEMPERATURE AND HUMIDITY ARETHE SAME IN DIFFERENT AREAS BUT AT THE SAME ALTITUDEo TAKES ON THE SAME CHARACTERISTICS AS THE AREA IT IS IN. IF IT ISCOLD THEN THE MASS IS COLD, IF IT IS WET THE MASS BECOMESMOIST AND SO ON.
FRONTSo FRONTS: A BOUNDARY BETWEEN AIR MASSES THERE ARE THREE TYPES OF FRONTSo COLD FRONTS: MOVE QUICKLY. COLD AIR PUSHES AGAINST WARM AIR, CAUSING THE WARM AIRTO RISE. CUMULUS CLOUDS HEAVY STORMS AFTER THE STORM WEATHER IS CLEAR AND COOL
FRONTSo WARM FRONTS MOVE SLOWLY. WARM AIR MOVES OVER DENSE COLD AIR, HIGH CIRRUS AND STRATUS CLOUDS. HOURS OF RAIN OR SNOW FALLo STATIONARY FRONTS: THE COLD AND WARM FRONTS AND DON’T MOVE. IT MAYREMAIN THIS WAY FOR A FEW DAYS, AND CAUSE CLOUDCOVERAGE. EVENTUALLY IT WILL BECOME ONE OF THE OTHERFRONTS.
PRESSURE SYSTEMS AND WEATHER HIGH PRESSURE: LARGE AIR IS SINKING AND MOVING CLOCKWISE CLEAR SKIES, CALM AIR, GENTLE BREEZE LOW PRESSURE: AIR CIRCLES COUNTER-CLOCKWISE AND MOVES UPWARD AIR MOVES FASTER AS IT MOVES UP, THIS CAN CAUSE STORMYWEATHER
FORMATION OF STORMS LOW PRESSURE SYSTEMS CAN BECOME STORMS: TROPICAL STORMS ARE LOW PRESSURE STORMS THAT FORMNEAR THE EQUATOR. WINDS OF 65 KPH HURRICANE LOW PRESSURE STORMS WITH WINDS OF 120KPH.CAN UPROOT TREES. FORMATION AND EFFECTS OF HURRICANES: STRIKE BETWEEN AUGUST AND OCTOBER IT GROWS OVER WARM WATER, DIES OUT WHEN WATER GETSCOLD OR MOVES OVER LAND EYE OF THE STORM IS CLEAR, JUST AROUND THE EYE ARE LARGECUMULUS CLOUDS CAUSE TORNADOES, HEAVY RAINS, DAMAGE, FLOODING, STORMSURGES (HUGE WALLS OF WATER) THERE IS TIME TO PLAN AND EVACUATE
WINTER WEATHER WINTER STORMS: WINTER STORMS HAPPEN WHEN TWO STORMS COLLIDE CAN BE WARNED 48 HOURS PRIOR TO A STORM BLIZZARDS: BLINDING SNOW STORM WITH WINDS OF 56KPH AND LOWTEMPERATURES. CAN KNOCK DOWN TREES AND POWER LINES, PIPESCAN FREEZE, FACILITIES MAY BE CLOSED ICE STORMS FREEZING RAIN COVERS EVERYTHING WITH HEAVY AND SMOOTH ICE HARD TO DRIVE, THINGS BREAK WITH THE WEIGHT OF THE ICE, CANSHUT DOWN ENTIRE CITIES
fronts o fronts: a boundary between air masses there are three types of fronts o cold fronts: move quickly. cold air pushes against warm air, causing the warm air to rise. cumulus clouds heavy storms a
o Air masses of North America Fronts o Stationary fronts o Cold fronts o Warm fronts o Fronts and the jet stream o Frontogenesis o Drylines o Occluded fronts . - transient weather systems (Rossby waves) - small scale f
Fronts are the boundaries between two air masses. Fronts are the basic building blocks of weather systems. Fronts occur where two large air masses collide at the earth's surface. Each air mass has a different temperature associated with it. Fronts are caused by winds moving one air mass
between two air masses stalls, the front is called a stationary front. Cloudy skies and light rain are common along stationary fronts. Occluded Front Cold fronts move faster than warm fronts. When a fast-moving cold front catches up with a slow-moving warm front, an occluded, or blocked, front forms. Occluded fronts usually bring precipitation.
storm events, high and low pressure movements (high pressure usually is an indication of good, clear weather, whereas low pressure fronts are associated with storms), and occluded fronts. Occluded fronts normally precede storm events, thus making them a good indicator for tracking storm events.
Weather instruments are used to measure and record the weather. Weather instruments can be found in weather stations on land. The Met Office has hundreds of weather stations all over the UK. Weather instruments are also found at sea. They are found on some ships, but mainly on weather buoys designed to monitor weather and sea conditions.
interactions of air masses results in changes in weather conditions. Weather Maps and Air Pressure (MS ESS2-3, -4) Air Pressure n/a Weather Maps and Air Pressure Inquiry Lab n/a Weather Escape Room Weather Full Year Resource Atmosphere Air Masses and Fronts Atmosphere MS ESS2-6-Develop and us
Stationary fronts behave like warm fronts, but are more quiescent. Many times the winds on both sides of a stationary front are parallel to the front and have opposite direction. Typically stationary fronts form when polar air masses are modified significantly so as
Sector shutdowns during the coronavirus crisis: which workers are most exposed? Authors: Robert Joyce (IFS) and Xiaowei Xu (IFS) Summary The lockdown in response to the Covid-19 pandemic has effectively shut down a number of sectors. Restaurants, shops and leisure facilities have been ordered to close, air travel has halted, and public transport has been greatly reduced. Our analysis shows .
