Weather Services

From which of the following can the observed temperature, wind, and temperature/dewpoint spread be determined at a specified altitude?. Constant Pressure Analysis Charts. N/A. N/A.

Which correctly describes the purpose of convective SIGMETs (WST)?. They consist of either an observation and a forecast or just a forecast for tornadoes, significant thunderstorm activity, or hail greater than or equal to 3/4 inch in diameter. N/A. N/A.

The station originating the following METAR observation has a field elevation of 3,500 feet MSL. If the sky cover is one continuous layer, wha is the thickness of the cloud layer? (Top of overcast reported at 7,500 feet MSL). METAR KHOB 151250Z 17006KT 4SM OVC005 13/11 A2998. 3,500 feet. N/A. N/A.

Which chart provides a ready means of locating observed frontal positions and pressure centers?. Surface Analysis Chart. N/A. N/A.

The minimum vertical wind shear value critical for probable moderate or greater turbulence is. 6 knots per 1,000 feet. N/A. N/A.

The U.S. High-Level Significant Weather Prognostic Chart forecasts significant weather for what airspace?. 24,000 feet to 63,000 feet. N/A. N/A.

What significant cloud coverage is reported by this pilot report? KMOB UA/OV 15NW MOB 1340Z/SK OVC-TOP025 / OVC045-TOP090. The top of the lower overcast is 2,500 feet; base and top of second overcast layer is 4,500 and 9,000 feet, respectively. N/A. N/A.

The Surface Analysis Chart depicts. actual frontal positions, pressure patterns, temperature, dewpoint, wind, weather, and obstructionsto vision at the valid time of the chart. N/A. N/A.

Weather Advisory Broadcasts, including Severe Weather Forecast Alerts (AWW), SIGMETs, and Convective SIGMETs are provided by. ARTCCs on all frequencies, except emergency, when any part of the area described is within 150 miles of the airspace under the jurisdiction. N/A. N/A.

Given the following, what is the maximum altitude to maintain VFR below the ceiling in Class E airspace below 10,000 feet MSL METAR: KHOB 151250Z, 17006KT 4SM OVC040 13/11 A2998. 3,500 feet AGL. N/A. N/A.

In the following METAR/TAF for HOU, what is the ceiling and visibility forecast on the 7th day of the month at 0600Z? KHOU 061734Z 0618/0718 16014G22KT P6SM VCSH BK018 BKN035 FM070100 17010KT P6SM BKN015 OVC025 FM070500 17008KT 4SM BR SCT008 OVC012 FM071000 18005KT 3SM BR OVC007 FM071500 23008KT 5SM BR VCSH SCT008 OVC015. 4 statute miles visibility and an overcast ceiling at 1,200 feet AGL. N/A. N/A.

Turbulence that is encountered above 15,000 feet AGL not associated with cumuliform cloudiness, including thundestorms, should be reported as. clear air turbulence. N/A. N/A.

To best determine general forecast weather conditions covering a flight information region, the pilot should refer to. Graphical Forecasts for Aviation (GFA). N/A. N/A.

What is meant by the Special METAR weather observation fo KBOI? SPECI KBOI 091854Z 32005KT 1 1/2 SM RA BR OVC007 17/16 A2990 RMK RAB12. Rain and mist obstructing visibility; rain began at 1812Z. N/A. N/A.

Hatching on a Constant Pressure Analysis Chart indicates. windspeed 70 knots to 110 knots. N/A. N/A.

A pilot reporting turbulence that momentarily causes slight, erratic changes in altitude and/or attitude should report it as. light turbulence. N/A. N/A.

What is the upper limit of the Low Level Significant Weather Prognostic Chart?. 24,000 feet. N/A. N/A.

What is the bottom of the lowest overcast layer in the following pilot report? KMOB UA /OV APE230010/TM 1515/FL085/TP BE/ SK BKN065/WX FV03SM HZ FU/TA 20/TB. There is a broken layer at 6,500 feet. N/A. N/A.

When turbulence causes changes in altitude and/or attitude, but aircraft control remains positive, that should be reported as. moderate. N/A. N/A.

What weather phenomenon is implied within an area enclosed by small scalloped lines on a U.S. High-Level Significant Weather Prognostic Chart?. Cumuliform clouds, icing, and moderate or greater turbulence. N/A. N/A.

What does the contraction VRB in the Terminal Aerodrome Forecast (TAF) mean?. Wind direction is variable. N/A. N/A.

What values are used for Winds Aloft Forecasts?. True direction and knots. N/A. N/A.

The difference found by subtracting the temperature of a parcel of air theoretically lifted from the surface to 500 millibars and the existing temperature at 500 millibars is called the. lifted index. N/A. N/A.

Which weather chart depicts conditions forecast to exist at a specific time in the future?. 12-Hour Significant Weather Prognostic Chart. N/A. N/A.

The most current en route and destination weather information for an instrument flight should be obtained from the. Flight Service. N/A. N/A.

During preflight preparation, weather report forecasts can best be obtained by means of contacting the. weather forecast office (WFD). N/A. N/A.

What wind conditions would you anticipate when squalls are reported at your destination?. Sudden increases in windspeed of at least 16 knots to a sustained speed of 22 knots or more for at least 1 minute. N/A. N/A.

On a Surface Analysis Chart, the solid lines that depict sea level pressure patterns are called. isobars. N/A. N/A.

What type of Inflight Weather Advisories provides an en route pilot with information regarding the possibility of moderate icing, moderate turbulence, winds of 30 knots or more at the surface and extensive mountain obscurement?. AIRMETs and Center Weather Advisories (CWA). N/A. N/A.

To best determine observed weather conditions between weather reporting stations, the pilot should refer to. pilot reports. N/A. N/A.

The remarks section of the Aviation Routine Weather Report (METAR) contains the following coded information. What does it mean? RMK FZDZB42 WSHFT 30 FROPA. Wind shift at three zero due to frontal passage. N/A. N/A.

What flight planning information can a pilot derive from Constant Pressure Analysis Charts?. Winds and temperatures aloft. N/A. N/A.

What is the meaning of the terms PROB40 2102 +TSRA as used in a Terminal Aerodrome Forecasts (TAF)?. Between 2100Z and 0200Z there is a forty percent (40%) probability of thunderstorms with heavy rain. N/A. N/A.

On a Surface Analysis Chart, close spacing of the isobars indicates. strong pressure gradient. N/A. N/A.

Dashed lines on a Surface Analysis Chart, if depicted, indicate that the pressure gradient is. weak. N/A. N/A.

Which statement pertaining to the following Terminal Aerodrome Forecast (TAF) is true? TAF KMEM 091135Z 0915 15005KT 5SM HZ BKN060 FM1600 VRB04KT P6SM SKC. SKC in the valid period indicates no significant weather and sky clear. N/A. N/A.

Terminal Aerodrome Forecasts (TAF) are issued how many times a day and cover what period of time?. Four times daily and are usually valid for a 24 hour period. N/A. N/A.

What single reference contains information regarding a volcanic eruption, that is occurring or expected to occur?. In-Flight Weather Advisories. N/A. N/A.

SIGMETs are issued as a warning of weather conditions which are hazardous. to all aircraft. N/A. N/A.