Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Southwestern Mountains

March-April-May Precipitation

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By Spring, the effect of La Niña in the southwestern mountain increases, and the average deficits in precipitation increase, particularly at Grants. In strong La Niña events, deficits average less than 50% of the long term normal.

A description of the graphs is located at the bottom of the page.

winter precip for grants during la nina events

Percent of Longterm Average for all La Niña Events = 62% , for strong La Niña Events = 46%

winter precip for luna during la nina events

Percent of Longterm Average for all La Niña Events = 64% , for strong La Niña Events = 44%

Precipitation values for 3-month periods during 19 La Niña Events since 1949-50 are plotted with respect to the long term precipitation average, listed to the right of the graph. The precipitation totals for each 3-month period are plotted above or below each bar. Years for which the La Niña Event was considered to be strong are colored in purple. "M" represents a 3-month period with missing data. Finally, the percents of longterm normal for all La Niña events and for the strong La Niña events are listed below each graph.

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Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

NWS ABQ La Nina Spring Precipitation CD4