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 HABY HINTS QUIZ, SET 7

METEOROLOGIST JEFF HABY

The following 50 question quiz asks multiple choice questions based on Haby Hints 301 through 350 covered at this link: http://theweatherprediction.com/habyhints/

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

301. The Showalter Index is superior to using the Lifted Index when:
a. The PBL is very warm and humid
b. The forecast area is in the warm sector of a mid-latitude cyclone
c. A shallow region of cold air is in the lower troposphere
d. In desert regions

302. Given the data below, what is the Total Totals Index?

850 mb Temperature = 18 C
500 mb Temperature = -17.5 C
850 mb Dewpoint = 12 C

a. 65
b. 55
c. 45
d. 35

303. Given the data below, what is the K Index?

850 mb Temperature = 18 C
500 mb Temperature = -5 C
850 mb Dewpoint = 10 C
700 mb Dewpoint Depression = 22 units of C

a. 11
b. 21
c. 31
d. 41

304. The SWEAT index takes into consideration directly or indirectly all of the following except:
a. Wind shear
b. Moisture
c. Forced lifting
d. Instability

305. CAPE is used to assess:
a. Hail potential
b. Thunderstorm potential
c. Updraft strength
d. All of the above

306. This is the amount of energy per mass a parcel of lifted surface air must overcome in order to lift into the region of positive instability.
a. Convective Inhibition
b. Convective Available Potential Energy
c. Lifted Index
d. Lifted Condensation Energy

307. When determining the Lifted Condensation Level, the lifting below the LCL is at the _____(1)______ adiabatic lapse rate. When unsaturated air rises, the dewpoint decreases by ____(2)_____ with height.
a. (1) dry, (2) 4 C per kilometer
b. (1) dry, (2) 2 C per kilometer
c. (1) moist, (2) 4 C per kilometer
d. (1) moist, (2) 2 C per kilometer

308. CAP is given in units of ______(1) ________ difference. This temperature difference is the amount of warming (or rather the weather conditions that will cause the parcel to no longer be colder than surrounding environment) required to produce no CAP. When the CAP is less than _____(2)_______, storms are likely to develop shortly when the only parameter holding back convection is the CAP.
a. (1) Fahrenheit, (2) 2.0
b. (1) Fahrenheit, (2) 7.0
c. (1) Celsius, (2) 2.0
d. (1) Celsius, (2) 7.0

309. The pressure level at the bottom of the CAPE region is the:
a. Level of Free Convection
b. Lifted Condensation Level
c. Equilibrium Level
d. Convective Condensation Level

310. The pressure level at the top of the CAPE region is the:
a. Level of Free Convection
b. Lifted Condensation Level
c. Equilibrium Level
d. Convective Condensation Level

311. Which of the following will always be highest in elevation?:
a. Level of Free Convection
b. Equilibrium Level
c. Maximum Parcel Level
d. Lifted Condensation Level

312. A storm moving from 225 degrees is moving from the:
a. Northeast
b. Southeast
c. Northwest
d. Southwest

313. The Helicity value is used to assess:
a. Wind shear
b. Instability
c. Moisture
d. Lifting mechanisms

314. The EHI (Energy Helicity Index) combines two indexes to assess:
a. Moisture and lifting mechanisms
b. Wind shear and instability
c. Instability and Moisture
d. Lifting mechanisms and wind shear

315. The BRN (Bulk Richardson Number) assesses the balance between:
a. Moisture and lifting mechanisms
b. Wind shear and instability
c. Instability and Moisture
d. Lifting mechanisms and wind shear

316. The SRDS (Storm Relative Directional Shear) value is 15. This would indicate ___________ shear.
a. Weak
b. Moderate
c. Strong

317. When air rises the relative humidity of the air will increase and the dewpoint depression of the air will _________.
a. Increase
b. Decrease

318. The MW (Maximum Wind) parameter value can be used to determine:
a. Highest wind speed on the sounding
b. Pressure level with highest wind speed
c. Height of the highest wind speed
d. All of the above

319. A CAPE of 1000 J/kg correlates into a maximum updraft speed of ________ meters per second.
a. 14.7
b. 24.7
c. 34.7
d. 44.7

320. The ______________ is the height of cloud bases resulting from air rising from the surface due to positive buoyancy alone.
a. Lifted Index
b. Lifted Condensation Level
c. Convective Condensation Level
d. Level of the Free Convection

321. TEI (THETA-E INDEX) assesses the potential for _____________________.
a. Elevated convection
b. Freezing temperatures
c. Severe weather
d. Tropical convection

322. The surface wind speed is 10 m/s while the wind speed 3 km up is 20 m/s. What is the 0 to 3 km shear?
a. 3.3
b. 4.3
c. 5.3
d. 6.3

323. The relative humidity will ___________ when the temperature increases while the dewpoint remains constant.
a. Increase
b. Decrease

324. Theta-E will increase as:
a. Wind speeds become stronger
b. Dynamic lifting becomes stronger
c. Temperature and dewpoint increase
d. Cloud cover increases

325. An environment that is ____(1)_____ and ____(2)_____ in the low levels and cool and dry in the middle levels is convectively unstable.
a. (1) cold, (2) dry
b. (1) cold, (2) moist
c. (1) warm, (2) dry
d. (1) warm, (2) moist

326. Why are hurricanes difficult to predict?
a. Not as much data over ocean areas
b. Lack of good mesoscale data
c. Very subtle changes in the environment can significantly change the direction and speed the hurricane moves
d. All of the above

327. (Statement 1) At the surface a polar vortex will have high pressure. (Statement 2) The polar vortex aloft propagates toward where the polar air mass moves.
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

328. A region of highest values of rising air due to forced lifting on the model progs is termed a:
a. Vort max
b. Jet streak
c. UVV max
d. Theta-E ridge

329. A "tornadic circulation" that is not in contact with the ground is termed a __________. If the circulation is not in contact with the ground then it is not a tornado.
a. Breeze
b. Gust front
c. Funnel
d. Vort max

330. The dewpoint can be determined when the values of temperature and ____________ are known.
a. Wet-bulb
b. Pressure
c. Air density
d. Wind speed

331. For regions in the middle and high latitudes, the relative humidity inside a house tends to be much _________ in winter as compared to summer.
a. Lower
b. Higher

332. 3 am on Friday is usually within the time frame called:
a. Wednesday night
b. Thursday night
c. Friday night
d. Saturday night

333. The average sea level barometric pressure is defined as _____(1)______ mb. Actual barometric pressure will be _____(2)______ than sea level air pressure for locations above sea level.
a. (1) 998, (2) higher
b. (1) 998, (2) lower
c. (1) 1013, (2) higher
d. (1) 1013, (2) lower

334. Instability release in a thundersnow situation usually occurs from:
a. Surface based convection
b. Dynamic lifting
c. Fronts
d. Elevated convection

335. A city in the Southeast U.S. that experiences the most significant cold air damming events in winter is:
a. Dallas, TX
b. Atlanta, GA
c. Little Rock, AR
d. New Orleans, LA

336. The difference between stratiform and convective precipitation is:
a. Instability release
b. Forced lifting
c. Warm moist air in the lower troposphere
d. Wind shear

337. (Statement 1) There tends to be a strong gradient in air density from one side of a dryline to the other. (Statement 2) Drylines are common in the spring in the high plains region of the United States.
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

338. (Statement 1) The jet stream is broken up into segments of higher velocity winds called jet streaks. Further, upper level closed lows can reverse the wind flow of the jet stream in some places. (Statement 2) The jet stream winds have the strongest wind speed in the lower 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

339. Wind speeds at the center of a closed trough tend to be __________.
a. Strong
b. Weak

340. The Lifted Index is made more unstable by:
a. Decreasing 500 millibar temperature
b. Decreasing surface temperature
c. Decrease surface dewpoint
d. All of the above

341. What is a heat burst?
a. Several days of above normal temperatures in the hot part of the summer
b. Rapid increase of temperatures due to solar radiation in the morning
c. Explosion thunderstorm development due to latent heat release
d. Extremely hot and dry downdraft of air

342. Which of the following is false concerning giant hail?
a. Requires an intense updraft to develop
b. Shape is perfectly circular
c. Has rings of cloudier and clearer ice
d. Hail stones are destructive

343. Many cold fronts will have the following feature:
a. Wind shift
c. Surface pressure trough
d. All of the above

344. To see how well a model initializes, compare the model initialization to the:
a. Model initialization of another model
b. Analysis chart of the actual data
c. Same models initialization from when a similar weather set-up occurred
d. Consensus initialization of several models

345. The 3-H's for the summer-like conditions in the Southeast U.S. are hot, hazy and:
a. High
b. Halo
c. Humid
d. Hydrostatic

346. A wet snow will have a snow to liquid equivalent of:
a. 4 to 1
b. 12 to 1
c. 20 to 1
d. 30 to 1

347. (Statement 1) The frost point is higher in temperature than the dewpoint. (Statement 2) The vapor pressure is less over ice than over water 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

a. Air masses advecting over each other
b. An increase in the cyclonic spin aloft
c. Dynamic lifting through low level convergence and upper level divergence
d. The acceleration and deceleration of wind within a jet streak

349. When 1000 to 500 mb thicknesses are increasing over the forecast area it is likely that __________ is occurring.

350. A trough over the forecast area will generally bring ____(1)_____ temperatures. A trough will ___(2)____ if the winds are stronger on the downstream side of the trough as compared to the upstream side.
a. (1) cooler, (2) dig
b. (1) cooler, (2) lift
c. (1) warmer, (2) dig
d. (1) warmer, (2) lift

KEY

301. C 311. C 321. A 331. A 341. D
302. A 312. D 322. A 332. B 342. B
303. A 313. A 323. B 333. D 343. D
304. C 314. B 324. C 334. D 344. B
305. D 315. B 325. D 335. B 345. C
306. A 316. A 326. D 336. A 346. A
307. B 317. B 327. B 337. D 347. B
308. C 318. D 328. C 338. C 348. A
309. A 319. D 329. C 339. B 349. A
310. C 320. C 330. A 340. A 350. B