National Weather Service United States Department of Commerce

Hazardous Traveling Conditions for the Midwest; Strong Pacific Storm Approaching

A storm will track across portions of the Midwest and into the western Great Lakes through Friday as a combination of a wintry mixture and rain will result in hazardous traveling conditions. A strong Pacific system will be approaching with high winds, and heavier rain and snow late Friday into the weekend with impacts spreading across much of the West. Across Hawaii, strong winds and high surf. Read More >

Most Recent 24-hr Precipitation (ending 5am MST on date listed)

total-monsoon-precipitation
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Lightning Chart Information:

These charts show the number of (cloud-to-ground) lightning strikes in the selected region. Lightning strikes are a unique method to track the monsoon as the data do not suffer from issues more common to rain gauges (low spatial coverage across the region outside of population centers) and can therefore give a more complete picture of thunderstorm activity. The bar chart displays total strikes to date for each year, as well as the total for the entire season ending September 30th. The charts are updated around 5pm daily. Data source: VAISALA NLDN.


Learn more about hourly/daily lightning climatology with SPC's Data Viewer.

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Show/Hide Region Map

lightning regions
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Monsoon Statistics

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Rainfall by Month *Preliminary for Current Year*
Tucson Haywood Plot historical monsoon start dates

Monsoon Education

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Satellite and Precip Maps

GOES West

GOES West

GOES East

GOES East

Precipitable Water

precipitable water

Total Monsoon Precipitation

total-monsoon-precipitation

Precent of Average Monsoon Precipitation

percent-of-average-monsoon-precipitation

More monsoon tracking maps and resources can be found at the following links:

These resources are provided by University of Arizona Cooperative Extension and the Climate Assessment for the Southwest.