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Last update: 07:00, 9 Sept 2026
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Tropical Storm Arthur (June 2026) dropped about 200 mm (8 in) of rain on Piedras Negras, pushing the Rio Bravo to 7.35 m in front of the city, killing one person, and prompting closure of the international bridges to Eagle Pass. That's specific to Piedras Negras, and it's the kind of local detail that a state-level forecast simply can't capture.
Tropical Storm Arthur (June 2026) dropped about 200 mm (8 in) of rain on Piedras Negras, pushing the Rio Bravo to 7.35 m in front of the city, killing one person, and prompting closure of the international bridges to Eagle Pass.. June 15, 2026: historic rainfall of 81.8 mm (versus a typical 11-13 mm) caused severe flooding in Monclova and neighboring Frontera..
RainViewer's radar data for Mexico comes from the Comision Nacional del Agua (CONAGUA), updated every 5 minutes. What the live map shows for Piedras Negras that a forecast cannot: exactly where the rain is right now, not a generic probability for the wider region.
Rainy season (May-September): most active period, peaking around June and September; flash flooding that overwhelms drainage built for near-zero average rainfall is the recurring theme across the state's cities.
Dry season (November-March): long, very dry, and the most stable and predictable stretch of the year.
Piedras Negras is a significant border city, anchoring cross-border trade with Eagle Pass, Texas.. Checking the Piedras Negras rain radar 20 minutes before a weather-sensitive activity here shows whether conditions will hold or deteriorate.
Tropical Storm Arthur (June 2026) dropped about 200 mm (8 in) of rain on Piedras Negras, pushing the Rio Bravo to 7.35 m in front of the city, killing one person, and prompting closure of the international bridges to Eagle Pass.. The live radar shows whether conditions are building or clearing -- the key question for anyone planning around rain in Piedras Negras.
First-time visitors to Piedras Negras tend to underestimate how fast conditions change here. The hyperlocal radar shows real rain, minute by minute, instead of a generic forecast icon.
RainViewer's radar data for Mexico comes from the Comision Nacional del Agua (CONAGUA) -- Mexico's National Water Commission -- supplemented by regional sources including the Comision Estatal de Aguas de Queretaro and the Universidad de Guadalajara's (UdG) meteorological radar. The map updates every 5 minutes, showing the actual rain over Piedras Negras rather than a generic probability for the wider region.
Piedras Negras is a significant border city, anchoring cross-border trade with Eagle Pass, Texas.. That's context, not a current forecast -- for real-time conditions, RainViewer's Piedras Negras radar updates every 5 minutes with CONAGUA data.
It depends on the storm's exact position and speed, not a forecast percentage. Pulling up the Piedras Negras radar before leaving shows whether rain is close or already past.
Tropical Storm Arthur (June 2026) dropped about 200 mm (8 in) of rain on Piedras Negras, pushing the Rio Bravo to 7.35 m in front of the city, killing one person, and prompting closure of the international bridges to Eagle Pass. is a recognized risk here, and traffic can back up quickly once heavy rain starts. The radar helps time departures around it.
Tropical Storm Arthur (June 2026) dropped about 200 mm (8 in) of rain on Piedras Negras, pushing the Rio Bravo to 7.35 m in front of the city, killing one person, and prompting closure of the international bridges to Eagle Pass.. A radar check ahead of heavy rain is worth the minute it takes.
Dry season (November-March): long, very dry, and the most stable and predictable stretch of the year. Visiting outside the wettest months means checking the radar before committing to outdoor plans.
Arid/semi-arid desert climate across most of the state; annual rainfall is low and concentrated in isolated but intense convective storms, plus occasional tropical remnants crossing from the Gulf, which tends to produce narrow, localized storm cells rather than broad, uniform rain across Piedras Negras. A standard forecast can't capture that kind of variation.
Yes, RainViewer covers Piedras Negras with a hyperlocal radar built on CONAGUA data, updated every 5 minutes, with 48 hours of radar history and a short-term forecast on the Essential plan.
You can -- RainViewer's rain alerts can be set for an exact location in Piedras Negras, giving advance notice rather than just confirming current rain.
Piedras Negras's weather, live
Piedras Negras is a significant border city, anchoring cross-border trade with Eagle Pass, Texas.. Skip the guesswork: RainViewer's radar shows exactly where it's raining over Piedras Negras, right now.
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