THE FOUR CORNERS — POLO'S MOISTURE BRINGS FOUR DAYS OF FLOOD RISK

On the board · September 28, 2026 →

BUILDING · September 28, 2026 · NO. 0928

THE WATER

A moderate risk of excessive rain covers the Four Corners today, where 1 to 3 inches falls on soils already near saturation, burn scars and slot canyons. It moves to south-central Arizona through the Texas Panhandle on Tuesday, the southern High Plains and central Texas on Wednesday, and south-central Texas on Thursday.

THE RECORD

41 turning points on record since Jul 18 — the 8 most recent shown.

Sep 27↑ intensified sharply

Sep 26active → building

Sep 25easing → active

Sep 24peak → easing

Sep 23building → peak

Sep 22active → building

Sep 21▽ slipped down the board

Sep 19building → active

WHO IT TOUCHES

Public safetyA hurricane landfall in Baja California Sur and Sonora, 1.7 million flood-affected in Thailand, and four days of flood risk in the US Southwest.

AviationPolo over Baja California Sur and Sonora airports, Surigae's cancellations in Japan's southern islands, and heavy rain across the Southwest.

Energy & utilitiesHurricane-force wind across Baja California Sur and Sonora grids, and flash floods over Southwest infrastructure.

Supply chainsBangkok's flooded roads, Mexico's north-west corridors under a hurricane, and a Rhine gauge still low.

AgricultureSinaloa and Sonora farmland under Polo's rain, flood risk on the southern Plains, and Thai rice provinces under water.

Live events & venuesHolidays declared in Bangkok, school closures across Baja California Sur, and a wet week for Southwest venues.

CONNECTED

One hurricane, two countries — Polo's core crosses Baja California Sur tonight.

WHAT THEY'RE SAYING

Several weather observers noted that moisture from Hurricane Polo is combining with an upper-level trough to set up a multi-day period of heavy rain and flash flooding across the Four Corners region. They highlighted how the slow movement of the remnants could extend the threat into Texas and Oklahoma as well. These details help show why the flood risk may last four days even as the broader forecast focuses on the overall pattern.

MVMax Velocity@MaxVelocityWXexplainerSep 27A surge of moisture from Hurricane Polo creates a high risk of flash flooding in the Four Corners area.
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WE@weathertrackusSep 27Slow moving storm and Polo remnants expected to bring heavy rain and flood risk to Four Corners states plus Texas and Oklahoma.
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IE@iembot_wpcSep 27Upper trough and tropical moisture from Polo and Odalys are creating a growing flash flood threat across the Four Corners.
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