Miami GP faces thunderstorms as McLaren targets breakthrough

Miami GP faces thunderstorms as McLaren targets breakthrough

Heavy thunderstorms are forecast for Sunday’s Miami Grand Prix, putting the 16:00 local start of round four at risk. McLaren says it’s ready to make a ‘significant step’ in extracting performance from its Mercedes power unit after early‑season glitches.

Why it matters:

• A storm could delay the start, force a shortened race, or alter track conditions, reshaping pit strategies and safety‑car usage.
• Midfield teams are eye‑ing any performance jump; McLaren’s progress could push it into the top‑five battle.
• Reliability woes with the Mercedes hybrid unit have already cost points, making a fix crucial for championship aspirations.

The details:

• Forecast: 70% chance of severe thunderstorms 09:00‑12:00 local; a delay could push the race into the evening.
• Start time: 16:00 local (10:00 GMT) – any hold‑up will affect strategy.
• McLaren’s hurdle: Electrical glitches stopped both Norris and Piastri in China; engineers say the fault in the Mercedes HPP has been isolated and a revised map will be run in Miami.
• Expected gain: Early data show up to a 0.4‑second‑per‑lap improvement, enough to lift McLaren into the top‑five qualifying bracket.

What's next:

• Race control will confirm a green‑light or postponement by Friday afternoon.
• McLaren will test the full‑power map in Thursday practice; a clean run could translate into a stronger race pace.
• If the storm forces safety‑car periods, tyre management and pit‑stop timing will be decisive, shaping the midfield battle for the next three races.