Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
51 Cards in this Set
- Front
- Back
|
The blizzard of 1993 paralyzed the eastern seaboard with dangerous winds and accumulating snow. Where did the heaviest snow fall with respect to the center of low pressure?
|
North west
|
|
|
Were the isobars surrounding the low pressure closely packed or widely spaced? What does this mean?
|
Closely packed, and it means they were strong.
|
|
|
Fortunately, all the weather forecast offices predicted there would be a blizzard with close to two feet of snow. Therefore, everyone was prepared for a snowstorm of mammoth proportions. Is this an accurate statement?
|
No.
|
|
|
Did the jet stream play any role in the blizzard of 1993? Explain.
|
All of the jet streams were forced into one and fed the blizzard, which made it continue to dump snow all over.
|
|
|
An extremely large body of air whose properties of temperature and humidity are fairly similar in any horizontal direction at any given altitude is called what?
|
Air mass.
|
|
|
A cold, shallow air mass would be called what?
|
Polar
|
|
|
A warm, deep air mass would be called what?
|
tropical
|
|
|
How does snow pack interact with an air mass moving southward from Canada?
|
helps it keep it's intensity
|
|
|
If I drive across a flooded road when no one is watching it's alright...isn't it?
|
No
|
|
|
An air mass is cold and dry. What are it's abbreviations?
|
AC
|
|
|
A front that moves less than 5 mph is called a _______ front.
|
stationary
|
|
|
A front that marks the edge of colder, drier air is called a ______ front.
|
cold
|
|
|
A front that marks the edge of warmer, moister air is called a ______ front.
|
warm
|
|
|
A ___ _____ marks the boundary between moist and dry air.
|
dry line
|
|
|
There are at least four ways to tell when a front has passed.
|
1. Wind shift
2. Temp change 3. Humidity change 4. Pressure change |
|
|
The development of or strengthening of a cyclone.
|
Cyclogenesis
|
|
|
This mechanism causes perfect divergence aloft by increasing the wind speed aloft. This mechanism is called a ___ _______.
|
jet stream
|
|
|
Name at least 2 techniques/methods forecasters use when trying to make a forecast.
|
1.analogue
2.nowcasting |
|
|
A cyclone develops in stages. There are 6 of these stages that we identify.
|
1. Stationary __/\__/\__/\
\/ \/ \/ 2. Frontal Wave 3. Warm sector, Latent energy 4. Cold front is catching the warm front. 5. Losing latent energy 6. It is gone and may start anew. |
|
|
When models agree, __________ is high. And vica versa.
|
confidence
|
|
|
Ensemble forecast is...
|
running several models with slightly different initial information.
|
|
|
Persistence forecast is..
|
future weather will be the same as the present.
|
|
|
Trend is...
|
surface systems will move in the same direction, at the same speed, as they have been moving, providing no evidence exists to counter that.
|
|
|
Analogue is..
|
based on experience from past event. "I've seen it before and this is what happened."
|
|
|
Statistical/probability example is...
|
20% chance of rain.
|
|
|
Weather types---climatoligicial
|
see cold air pooling in Siberia and know cold air will in KY in about 2 weeks...long range forecasting.
|
|
|
Cimatological...
|
desert will be dry, Ky will be hot and humid in summer.
|
|
|
Nowcasting..
|
weather happening now.
|
|
|
_____ _____ plays a key role in cyclogenesis.
|
wind aloft
|
|
|
What region of the country does my thesis cover?
|
Southern Appalachians
|
|
|
Why are the southern appalachians so susceptible to flash flooding? Name two reasons.
|
1. The Atlantic ocean lies east to the region.
2. The Gulf of Mexico lies to the south. |
|
|
How do you calculate dew point depression?
|
Temperature minus dewpoint.
|
|
|
Stage 1 of Air mass T-storms
|
Cumulus stage, dominated by rising air.
|
|
|
Stage 2 of Air mass T-storms
|
Mature stage, downdraft develops, storm is most intense.
|
|
|
Stage 3 of Air mass T-storms
|
Dying, dominated by down drafts.
|
|
|
______ makes a thunderstorm a thunderstorm.
|
Lightning
|
|
|
Severe thunderstorms have winds of __ mph or greater.
|
58
|
|
|
Hail ___" or greater in diameter
|
3/4
|
|
|
Typically dew points need to be greater than __ degrees.
|
60
|
|
|
A supercell is a
|
storm that rotates significantly.
|
|
|
A downburst..
|
can have winds greater than 100 mph and come with little or no warning.
|
|
|
Lightning...
|
30,000 degrees farenheit, and is 5 times hotter than the sun.
|
|
|
Heat lightning is...
|
far enough away, you cant hear the thunder.
|
|
|
Tornadoes are rated by the _______ ______.
|
Figita Scale (F0--F5)
|
|
|
A tornadoe outbreak is..
|
6 + tornadoes in a small area. (central KY, for example)
|
|
|
April 3-4, 1974: Super tornado outbreak, ____ tornadoes across ___ states.
|
148, 13
|
|
|
A _______ trough has closely spaced isobars
|
strong
|
|
|
In the cool season storms, __________ of air from the Gulf and Atlantic is critical. However, in the warm season __________ is not as critical.
|
advection
|
|
|
What kind of precipitation was forecasted for the Feb 98 snowstorm?
|
rain
|
|
|
Closely spaced isobars create...
|
winds
|
|
|
Warm season floods are different than cold season, how?
|
warm season had specific locations, while cold season floods were very broad scale.
|
