Worked example — can you fly?

• METAR: SPECI KMDW 121856Z 32005KT 1 1/2SM RA OVC007 17/16 A2980 RMK RAB35
• Temperature / dewpoint: 17 / 16 °C → spread 1 °C.
• Estimated cloud base: 1 × 400 = 400 ft AGL.
• Part 107 rule: must stay 500 ft below clouds and 2 000 ft horizontally from clouds.
• With a 400 ft cloud base, there is no altitude below the cloud that satisfies the 500 ft rule — even ground-level is too close vertically (you’d need the cloud to be above 500 AGL to fly at the surface).
• Also note: visibility 1 1/2SM is below the Part 107 minimum of 3 SM, and RA (rain) is present — additional reasons not to fly.