Tornadoes are rated on the Enhanced Fujita (EF) Scale based on estimated 3-second wind gusts in miles per hour (mph). An EF0 tornado, the weakest category, has winds from 65 to 85 mph. To assess the impact on small UAS performance, which are typically limited to winds around 20 knots (kt), convert the minimum EF0 wind speed of 65 mph to knots using the approximation 1 kt = 1.15 mph. The converted speed is approximately

Refer to Figure 12. Precipitation in the form of rain, which may accompany thunderstorms and the resulting microbursts that produce hazardous wind shear for small UAS, is reported at which airport?

(Refer to Figure 15.) According to the TAF for KMEM, which forecasted weather condition indicates a potential for icing on small unmanned aircraft?

(Refer to Figure 12.) Which airport's METAR report indicates surface wind conditions most likely to adversely impact small UAS performance during takeoff, flight, and landing?

Density altitude is

Refer to the provided figure. According to the 24 HR SIG WX PROG LOW LVL chart (VT 06Z Sun Apr 15 2012), the area depicted with extreme turbulence symbols presents the greatest risk to small UAS performance from

Fog most directly impacts small unmanned aircraft system (sUAS) operations by

You are conducting a small UAS flight when your weather app alerts you to a nearby thunderstorm producing hail. What is the most significant effect of hail on the aircraft's performance if encountered?

A remote pilot-in-command (PIC) is evaluating weather conditions for a proposed small unmanned aircraft (sUA) operation and determines that a stationary front is influencing the area. The front is producing widespread low stratus clouds, light rain, and light winds. What is the primary performance impact on the sUA from this weather scenario?

(Refer to Figure 15.) The TAF for KMEM indicates the likely passage of a front primarily due to

(Refer to the provided figure.) A remote pilot plans a small UAS operation in an area shown on the 24 HR forecast with the symbol for ceiling less than 1,000 feet and/or visibility less than 3 miles. This condition will primarily affect UAS performance by

(Refer to Figure 15.) The TAF for KMEM includes PROB40 1220/1222 1SM TSRA OVC008CB. Cumulonimbus (CB) clouds in thunderstorms can produce hail. What is the primary effect of hail on small unmanned aircraft systems (sUAS) performance?

A remote pilot is operating a small unmanned aircraft system (sUAS) near a thunderstorm and encounters a microburst. This will most likely affect the sUAS performance by causing

Fog is forecast to form when the surface air temperature reaches the dew point. The current temperature is 68°F, and the dew point is 62°F. After sunset, the temperature is expected to decrease at a rate of 1.5°F per hour. How many hours after sunset will fog most likely form?

A SIGMET indicates severe thunderstorms with hail within 20 nautical miles of your planned small unmanned aircraft systems (sUAS) flight path. What is the primary hazard posed by hail to the sUAS?

Refer to Figure 19, Low-Level Significant Weather (SIGWX) Prognostic Chart. For an sUAS operation planned between 90°W and 80°W along 40°N according to the 12 HR SIG WX PROG valid at 18Z Sat Apr 14 2012, the moderate turbulence indicated on the chart will most significantly affect performance by

Referring to Figure 15, the PROB40 1220/1222 1SM TSRA OVC008CB in the KMEM TAF represents conditions most likely to produce which primary effect on small unmanned aircraft performance?

Refer to Figure 15, which depicts Terminal Aerodrome Forecasts (TAFs) for KMEM and KOKC. According to the TAF for KMEM, a temporary period of fog (FG) with visibility of 1/2 SM is forecast. The primary effect of this fog on small unmanned aircraft systems (sUAS) performance is

Referring to a standard density altitude chart, the approximate density altitude at a pressure altitude of 2,000 feet and an outside air temperature (OAT) of 25°C is

Refer to Figure 12. A remote PIC plans to conduct a small UAS operation requiring maximum climb performance at one of the reporting stations. At which station are the reported weather conditions most likely to cause the greatest degradation in small UAS climb performance?

(Refer to Figure 12.) High density altitude reduces small unmanned aircraft performance by decreasing air density. Based on the temperature, dew point depression (humidity), and altimeter setting (pressure) in the METAR reports, which location indicates the highest density altitude?

A small UAS flight is to be conducted from a site at 2,000 feet MSL where the altimeter setting is 29.92 inches of mercury and the air temperature is 30°C. The approximate density altitude is

(Refer to the provided figure, a Low-Level Significant Weather Prognostic Chart.) The line symbol with semicircles on one side and triangles on the opposite side depicts which type of front?

Refer to the Low-Level Significant Weather (SIGWX) Prognostic Chart. The severe turbulence symbol near 80W and 40N on the 24 HR forecast (VT 06Z Sun Apr 15 2012) represents the greatest risk to small UAS performance from

Referring to the Low-Level Significant Weather (SIGWX) Prognostic Chart in the figure, which condition depicted along 40°N between 90°W and 80°W longitude for the 18Z validity time on April 14, 2012, would most adversely affect the performance of a small unmanned aircraft?

When operating a small unmanned aircraft at an airport with a field elevation of 2,000 feet MSL, an altimeter setting of 30.00 inches Hg, and an outside air temperature of 25°C, the approximate density altitude is closest to

Refer to Figure 12, which depicts Aviation Routine Weather Reports (METARs). The SPECI for KMDW reports RA (rain). If the report had instead indicated GR (hail), what would be the primary effect of hail on small unmanned aircraft systems (sUAS) performance?

A remote pilot plans a small unmanned aircraft system (sUAS) operation near KMEM within the valid period of the TAF shown in Figure 15. The sUAS performance is most likely to be adversely affected by high density altitude during which KMEM forecast period?

Refer to Figure 12, which presents Aviation Routine Weather Reports (METARs). A remote pilot in command (PIC) is planning a small unmanned aircraft system (sUAS) operation and must assess the impact of wind on aircraft performance. Which location's METAR reports the wind conditions most likely to cause degraded controllability and performance of the sUAS?

A continental polar (cP) air mass is classified as

High density altitude conditions MOST affect small unmanned aircraft performance by

A remote pilot is conducting a small UAS operation at 200 feet AGL under shallow stratus clouds with a reported temperature of 2°C. Through the FPV feed, the pilot observes the formation of rime ice on the leading edges of the wings. The BEST immediate action is to

Your small unmanned aircraft (sUA) is flying at 300 feet above ground level (AGL) when it encounters the core of a microburst with a downdraft speed of 6,000 feet per minute (fpm). Assuming no corrective action by the remote pilot and constant vertical velocity, approximately how many seconds will elapse before the sUA impacts the ground?

A remote pilot is planning a small unmanned aircraft (sUA) inspection flight over a construction site with cranes extending to 250 feet above ground level (AGL). The current METAR reports a ceiling of 800 feet AGL and visibility of 1.5 statute miles. The flight is planned at 350 feet AGL to clear the cranes. What is the MOST CRITICAL safety risk posed by the ceiling and visibility?

Hail encountered by a small unmanned aircraft system (sUAS) in flight will most likely cause

(Refer to Figure 12.) At which of the following airports are the reported weather conditions most likely to produce a high density altitude that would reduce the performance of a small unmanned aircraft system?

Ice accumulation on a small unmanned aircraft primarily affects its performance by

Refer to the provided figure, which depicts Low-Level Significant Weather (SIGWX) Prognostic Charts. The combination of the 'Ceiling less than 1,000 feet and/or visibility less than 3 miles' symbol and an adjacent moderate or greater turbulence symbol near 90W at 40N on the 12 HR SIG WX PROG chart is most indicative of what weather condition that adversely affects small UAS performance?

(Refer to the provided figure.) The moderate turbulence indicated on the 12 HR SIG WX PROG chart near 80°W would most significantly impact small unmanned aircraft systems (sUAS) performance by

(Refer to Figure 15.) According to the TAF for KMEM, a temporary condition of 1/2 SM fog is forecast between 1212Z and 1214Z. This fog would most significantly impact the performance of a small unmanned aircraft system (sUAS) by

A remote pilot is evaluating potential small UAS operating sites based on the Aviation Routine Weather Reports (METARs) shown in Figure 12. Which location's conditions most strongly suggest proximity to a frontal boundary between air masses, where low visibility due to fog and low overcast ceilings could adversely affect UAS performance and visual line-of-sight operations?

A Remote PIC observes that the current air temperature is higher than standard and the altimeter setting indicates lower than standard pressure. What is the expected effect on small UAS performance?

When planning a small UAS operation in the vicinity of an approaching cold front, which weather effect is most likely to adversely impact aircraft control?

A remote pilot in command (PIC) is operating a small unmanned aircraft system (sUAS) in conditions of high atmospheric temperature, low pressure, and a stable atmosphere. These conditions will most likely result in

Refer to the provided figure, a Low-Level Significant Weather Prognostic Chart. A remote PIC is evaluating small UAS performance risks for an operation near 90W, 40N at 18Z Sat Apr 14 2012, where the chart depicts moderate turbulence along with areas of ceilings less than 1,000 feet and/or visibility less than 3 miles. These conditions most likely result from

A remote pilot in command (PIC) is planning a small UAS flight and forecasts indicate developing thunderstorms along the route. To address the effects of thunderstorms and microbursts on UAS performance, the PIC should

Refer to Figure 12. The METAR report for which location indicates the highest temperature, resulting in the highest density altitude and most significant degradation to small unmanned aircraft performance?

Refer to the Low-Level Significant Weather (SIGWX) Prognostic Chart. Moderate or greater turbulence is forecasted near 80°W / 40°N valid at 06Z on Sunday, April 15, 2012. Applying principles of lightning risk management, the remote PIC planning a small UAS operation in that area should

(Refer to Figure 12.) The METAR for KMDW reports RA and OVC007 with a temperature/dewpoint of 17/16. If the outside air temperature were at or below freezing, the reported rain would most likely result in what effect on small UAS performance?

When operating a small unmanned aircraft near an approaching cold front, what weather effect is most likely to impact aircraft performance?

Ceiling and visibility conditions affect small unmanned aircraft (sUA) operations primarily by

Referring to the Low-Level Significant Weather (SIGWX) Prognostic Chart in the figure, the notation '120' adjacent to certain wind arrows on the 12 HR forecast panel represents