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 HABY HINTS QUIZ, SET 6

METEOROLOGIST JEFF HABY

The following 50 question quiz asks multiple choice questions based on Haby Hints 251 through 300 covered at this link: http://theweatherprediction.com/habyhints/

An answer key is provided at the bottom of this webpage.

251. Which of the following is true:
a. The wind chill is the temperature objects cool to when wind blows over them
b. The wind chill accounts for all processes that can make a person feel colder
c. The wind chill value changes little as the wind speed increases in cold air
d. The wind chill value is how cold a person feels when wind and temperature are combined

252. The official definition of a "white Christmas" is:
a. Any amount of snow falling on Christmas day
b. At least 1 inch of snow of the ground on Christmas day
c. Snow falling at least half the day on Christmas day
d. Cloudy skies on Christmas day

253. (Statement 1) Low level Cold Air Advection is a lifting mechanism. (Statement 2) A surface cold front is a lifted mechanism.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

254. Cold air advection plus ____________ will maximize the amount of cooling that takes place.
b. A warm ground temperature
c. Evaporational cooling
d. Sinking air

255. PVA occurs:
a. Immediately under the vort max
b. Where warm air advection occurs
c. Where higher values of vorticity are advected into the region
d. Most significantly in the boundary layer

256. (Statement 1) A jet streak feature typically moves faster than in the winds within the jet streak. (Statement 2) The jet stream is a higher velocity segment of wind within the jet streak.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

257. Forecasting using the convective temperature is most relevant in:
a. Forced lifting thunderstorm situations
b. Severe thunderstorm situations
c. Tropical storm situations
d. Air mass thunderstorm situations

258. Which process will modify an air mass after it moves away from the source region?:
b. Significant difference between air and soil temperature
c. Evaporational cooling
d. Cloud cover
e. All of the above can modify an air mass

259. The surface temperature is 32 F. All of the following will tend to help cool the temperature during a precipitation event except:
a. Above freezing rain drops
b. Supercooled rain drops
c. Frozen precipitation
d. Melting and evaporation from precipitation

260. (Statement 1) The units of density are volume divided by mass. (Statement 2) Dry air is less dense than moist air at the same temperature.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

261. What contributes to forming giant snow flakes?
a. Strong wind, light precipitation, wet snow
b. Light wind, heavy precipitation, wet snow
c. Strong wind, heavy precipitation, dry snow
d. Light wind, heavy precipitation, dry snow

262. Why are forest fires common in the summer?
a. Warm temperatures evaporate moisture away from the surface
b. Increased amounts of lightning
c. Dry vegetation during warm dry weather
d. All of the above

263. (Statement 1) If the 1000 to 500 mb thickness is less than 5,400 meters then if precipitation occurs it will always be snow. (Statement 2) If the 1000 to 500 mb thickness is greater than 5,400 meters then if precipitation occurs it will always be rain.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

264. At what temperature is the temperature the same on both the Celsius and Fahrenheit scale when converting one to the other.
a. 0
b. -20
c. -40
d. -273

265. Which of the following should be kept in mind when forecasting winter precipitation?
a. Make sure precipitation falls at the time the temperature profile supports winter precipitation
b. Make sure the surface dewpoint is at least 55 F
c. Make sure these is adequate instability, lift, and wind shear
d. All of the above

266. A broadcast meteorologist gives the following forecast:

Monday: 30% chance of rain
Tuesday: 20% chance of rain
Wednesday: 50% chance of rain
Thursday: 30% chance of rain
Friday: 40% chance of rain

What is the chance is it will rain on either Monday, Tuesday, Wednesday, Thursday, or Friday?

a. 31%
b. 52%
c. 88%
d. 95%
e. 100%

267. The movement of less dense air on the synoptic scale over more dense air at a gradual slant that increases in elevation as the air advects is related to:
c. Orographic lifting
d. Isentropic lifting

268. Why do urban temperatures tend to be warmer than rural temperatures on sunny light wind days?
a. More sensible heat release in urban areas
b. Less greenhouse gases in urban areas
c. More moisture and trees in urban areas
d. Higher elevation in urban areas

269. What is an isothermal layer?
a. Temperature increase with height
b. Temperature decrease with height
c. Temperature fluctuation with height
d. Temperature constant with height

270. (Statement 1) A surface relative humidity of 100% is an indication that it will rain. (Statement 2) The surface relative humidity will be 100% any time it rains.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

271. Popular weather data that is retrieved over the Internet include:
b. Model data
c. NOAA Analysis and Forecasts
d. All of the above

272. Virga is most likely to occur and a large amount of precipitation evaporated when:
a. The lower troposphere is warm and dry
b. The lower troposphere is cold and dry
c. The lower troposphere is warm and moist
d. The lower troposphere is cold and moist

273. A ____________ cold front is a cold front that approaches from the east or northeast. The winds behind this front come from those same directions. This type of front can occur when the clockwise rotation around high pressure brings colder air toward the south and west. This type of front can also occur to the north of a developing area of low pressure.
a. Trap door
b. Back door
c. Front door
d. Trick door

274. If a lightning strike is a sufficient distance from the observer, sound from the strike will not be heard. These silent bolts are called ______________ lightning.
a. Chill
b. Rogue
c. Heat
d. Hot

275. Air mass thunderstorms tend to have an environment with:
a. Weak speed wind shear and weak directional wind shear
b. Strong speed wind shear and weak directional wind shear
c. Strong speed wind shear and strong directional wind shear
d. Weak speed wind shear and strong directional wind shear

276. Clear skies with good visibility occurs due to:
a. Sinking air
b. Low amounts of air pollution
c. Dry air
d. A combination of the above

277. When forecasting high and low temperatures it is a good idea to:
a. Look over the MOS data
b. Consider mesoscale effects across the forecast area
d. All of the above

278. Which of the following is a limitation of using the 850-mb temperature and bringing it down dry adiabatically to the surface to estimate the high temperature?
a. Method only works on cloudy days
b. Method does not work when fronts are passing through
c. Method only works for high elevation regions
d. Method does not work in the spring

279. (Statement 1) The difference between the high and low tends to be much greater on dry clear 24-hour days than on warm cloudy 24-hour days. (Statement 2) When the surface temperature drops to the surface dewpoint the cooling rate is decreased thereafter at night due to the latent heat of condensation release.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

280. What is a reason(s) why the NWA and AMS seals could be losing popularity?
a. Seals show that the broadcaster has a working knowledge of meteorology concepts
b. Seals are not always required to get and keep employment; high costs; employers becoming more interested in communication skills
c. Seals show a broadcast meteorologist is rising in the profession
d. Seals are a great addition to the resume; enhances ability to move to higher markets and severe weather markets

281. All are reasons that polar areas are cold except:
a. Low sun angle
b. Low amounts of water vapor
c. Low albedo
d. Low amount of daylight hours in cool season

282. In which year did the AMS begin the CBM (Certified Broadcast Meteorologist) program?
a. 2000
b. 2005
c. 2008
d. 2010

283. Noises from the wind are caused by:
a. Friction
b. Thermal expansion
c. Molecular energy
d. Mass

284. What does a 40% chance of rain mean?
a. The forecaster is correct 40% of the time
b. There will be rain in 40% of the forecast region
c. The forecast has a 40% chance of being right
d. Any point location in the forecast region has a 40% chance of rain

285. A baseball when hit with the same force will tend to travel furthest in:
a. Cold and dry weather
b. Cold and moist weather
c. Warm and dry weather
d. Warm and moist weather

286. All the following enhance the lightning potential in a storm except:
a. High Precipitable Water
b. Large instability
c. Entire troposphere below freezing
d. Strong wind shear

287. All of the following are factors that reduce the chance of a tornado except:
a. Weak wind shear
b. Lifted Condensation Level close to the earth's surface
c. Low instability
d. Weak PBL wind

288. In a _____________, severe winds encompass a distance of at least 400 km (250 miles) either out ahead of or along a squall line MCS.
b. Tropical storm
c. Derecho
d. Downdraft

289. Which of the following weather parameters is used in classifying if a thunderstorm is severe?
a. Hail size
b. Lightning intensity
c. Rain intensity

290. The units of both CAPE and HELICITY ARE:
a. Meters per second squared
b. Joules
c. Newtons
d. Meters squared per seconds squared

291. (Statement 1) The Tropopause is at a higher elevation and lower pressure level in the warm season as compared to the cool season. (Statement 2) The tropopause is much more of a transition zone than a particular pressure level plane.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

292. The freezing level is important to know in:
a. Severe weather forecast situations
b. Winter weather forecast situations
c. Icing situations on aircraft
d. All of the above

293. This is the temperature after complete evaporational cooling occurs:
a. Dewpoint
b. Wet bulb
c. Mixing ratio
d. Parcel temperature

294. Which of the following statements is true:
a. Severe convective wind gusts become more likely as the Precipitation Water value increases above 2.0 inches
b. Hail becomes more likely as the Precipitation Water value increases above 2.0 inches
c. Updraft strength increases as the Precipitation Water value increases above 2.0 inches
d. If the Precipitable Water values is 2.0 inches it means it will most likely rain 2.0 inches
e. Precipitable Water is an important factor in determining whether a supercell will be HP, Classic or LP

295. Which of the following statements is true:
a. A high sfc to 500 mb RH value (less than 50%) usually represents a very stable troposphere
b. A very high sfc to 500 mb RH value (80% or greater) indicates that significant lifting will likely produce precipitation
c. Lifting will gradually saturate the troposphere over time since rising air warms toward the dewpoint
d. All of the above are true

296. To estimate the afternoon high on a morning sounding, take the environmental temperature 150 millibars above the surface and bring the parcel down _________ to the surface and read off the new temperature. This method while quick and practical does have many pitfalls.

297. (Statement 1) Mesoscale regions of high dynamic Upward Vertical Velocity will warm the troposphere more than the models indicate for the synoptic scale. (Statement 2) Thickness (TH) is the distance between two pressure levels in the troposphere.
a. Statement 1 and Statement 2 are both false
b. Statement 1 and Statement 2 are both true
c. Statement 1 is true and Statement 2 is false
d. Statement 1 is false and Statement 2 is true

298. If the 700 mb temperature is -3 C and the 700 mb height is 2,980 meters while the 500 mb temperature is -17 C and the 500 mb height is 5,370 meters, what is the L57 in C/km?
a. 7.9
b. 6.9
c. 5.9
d. 4.9

299. The pressure level at which air becomes saturated when forced lifting from the PBL occurs is termed the:
a. Convective Condensation Level
b. Equilibrium Level
c. Lifted Condensation Level
d. Maximum Parcel Level

300. In which case is knowing the Lifted Index most relevant?
a. Warm sector severe thunderstorm situation
b. Winter storm situation
c. Tropical storm situation
d. Isentropic lifting situation

KEY

251. D 261. B 271. D 281. C 291. B
252. B 262. D 272. A 282. B 292. D
253. D 263. A 273. B 283. A 293. B
254. C 264. C 274. C 284. D 294. E
255. C 265. A 275. A 285. D 295. B
256. A 266. C 276. D 286. C 296. A
257. D 267. D 277. D 287. B 297. D
258. E 268. A 278. B 288. C 298. C
259. A 269. D 279. B 289. A 299. C
260. A 270. A 280. B 290. D 300. A