Tornado Warning Active Pima Co., AZ — August 4 — SevereWX

The Storm Prediction Center maintains a Slight risk for severe thunderstorms on August 4 across parts of the Upper Midwest, including Minnesota, where storms pulse amid active severe thunderstorm watches. Right now, two severe thunderstorm watches cover northern and west central Minnesota until 2:00 AM EDT, with a mesoscale discussion underscoring the ongoing threat from robust storms capable of damaging winds and large hail. Separately in the Southwest, a tornado warning and severe thunderstorm warning target Pima County, Arizona, as a dangerous storm bears down.

These alerts highlight the scattered but potent severe weather picture overnight into early August 4, with Minnesota storms active and the Arizona tornado threat unfolding in real time.

Timeline

6:56 PM EDT — Severe Thunderstorm Watch Issued for Northeastern Minnesota

A severe thunderstorm watch covers Cass, Itasca, and Koochiching counties in far northern Minnesota until 2:00 AM EDT. Storms moving through the region are producing gusty winds and hail, with potential for isolated severe gusts over 60 mph. Stay prepared as these storms track southeastward.

10:04 PM EDT — SPC Mesoscale Discussion Targets North Central Minnesota

The Storm Prediction Center issued a mesoscale discussion for north central through west central Minnesota, tied to Severe Thunderstorm Watch 537. Ongoing clusters of thunderstorms pose a severe risk, especially for damaging straight-line winds. Conditions remain favorable for intensification over the next couple of hours.

10:59 PM EDT — Severe Thunderstorm Watch Expanded to West Central Minnesota

A severe thunderstorm watch, number 537, is now in effect for Becker, Beltrami, Clearwater, Grant, Hubbard, Lake of the Woods, Mahnomen, and Otter Tail counties in Minnesota until 2:00 AM EDT. Strong storms are developing here, bringing risks of large hail and destructive wind gusts. Monitor radar closely as activity increases.

11:44 PM EDT — Severe Thunderstorm Warning for Pima County, Arizona

A severe thunderstorm warning is active for Pima County, Arizona, until 12:15 AM EDT. This powerful storm is packing heavy rain, gusty winds, and possibly large hail. Seek shelter if you're in the path.

11:57 PM EDT — Tornado Warning Issued for Pima County, Arizona

A tornado warning is in effect for Pima County, Arizona, until 12:45 AM EDT. The storm shows rotation on radar, prompting urgent safety measures. If you're in the area, move to an interior room away from windows right away.

12:03 AM EDT — Severe Thunderstorm Watch issued north-central Minnesota

A severe thunderstorm watch is in effect until 2:00 AM EDT across Becker, Beltrami, Grant, Hubbard, Otter Tail, and Wadena counties in Minnesota. Damaging winds and large hail are possible with any storms that develop. Prepare now and monitor for warnings.

12:13 AM EDT — Tornado Warning issued Pima County, AZ

A tornado warning is in effect until 12:45 AM EDT for Pima County, Arizona — it could be extended or cancelled by NWS. Take cover immediately in a sturdy interior room on the lowest floor. Stay tuned to local news for updates.

12:15 AM EDT — Severe Thunderstorm Warning issued Pima County, AZ

A severe thunderstorm warning is active until 1:15 AM EDT for Pima County, Arizona. Expect strong winds capable of damage and large hail. Seek shelter indoors away from windows.

12:23 AM EDT — Tornado Warning active for Pima County

A tornado warning is now in effect for Pima County, Arizona, until 12:45 AM EDT — it could be extended or cancelled by the National Weather Service.

Strong storms in the area could produce a tornado.

People in the warned area should seek shelter right away.

12:36 AM EDT — Mesoscale Discussion 1831 for north central Minnesota

The Storm Prediction Center issued Mesoscale Discussion 1831 for parts of north central Minnesota. It concerns Severe Thunderstorm Watch 537. Storms in the area could bring severe weather tonight.

12:39 AM EDT — Tornado Warning for Pima Co., AZ

A Tornado Warning is active for Pima County, Arizona, until 1:30 AM EDT. It could be extended or cancelled by the National Weather Service. Seek shelter immediately if you're in the warned area.

12:56 AM EDT — Tornado Warning issued for Pima Co.

A tornado warning is now in effect for Pima County until 1:30 AM EDT — it could be extended or cancelled by the NWS. Radar indicates rotation capable of producing a tornado. Move to an interior room on the lowest floor immediately.

12:57 AM EDT — Severe Thunderstorm Warning issued for Pima Co.

A severe thunderstorm warning is active for Pima County until 1:15 AM EDT. Expect damaging winds and large hail with this storm. Take shelter away from windows.

What's Next

Overnight storms continue to threaten Pima County with severe weather potential. The tornado warning highlights the highest concern, but additional thunderstorms could develop. Monitor local alerts closely as conditions evolve; Slight risk persists.

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