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Heat waves hitting western U.S., eastern Canada

A cold front will make its way through California today, but temps will be back to normal tomorrow and later this week we will see the start of a heat wave in California's desert regions and the Central Valley.wear

The Coachella Valley will see highs in the 100s starting Friday with a peak high of 107 on Sunday, May 6. Yuma, AZ, will have a peak high of 105 on Sunday. The San Joaquin Valley will see highs in the upper 80s and mid-90s all next week. Temperatures will be 10 degrees above normal in the aforementioned areas; California's coastal growing regions will not be affected.

Rain is coming to southern Florida starting this Sunday, May 6. The regions of Belle Glade, Immokalee and Homestead can expect afternoon showers next week. The humidity in southern Florida is now around 70 percent.

Rains coming to a large section of central Mexico will start later this week and continue into next week. The berry- and avocado-growing regions of Michoacan and Jalisco might see well above four inches of total rainfall between tomorrow and next Wednesday, May 9, which could affect harvest and production.

The Bajio region of Mexico, which consists of parts of the states of Queretaro, Guanajuato and Aguascalientes, can also expect rains later this week into next. In these areas we are only talking about an inch or so of total rainfall. Lettuces, broccoli and celery are shipping out of these regions. 

The west coast of Mexico from Culiacan up through Ciudad Obregon and on to Hermosillo will see perfect growing conditions with highs into the upper 90s and no chances of rain. The Baja California regions of San Quintin and Vizcaino have average temps with no rain in sight.

Expect the newest tomato-growing locations in Mexico to come online in the next two weeks. Torreon, Coahuila, and areas in the states of San Luis Potosi, Michoacán and Zacatecas will mostly have Romas from shadehouse facilities. Quality is usually consistent, but the crop is susceptible to summer rains. Torreon is expecting perfect weather over the next 10 days. Regions of San Luis Potosi, Zacatecas and Michoacán are expecting rains next week. Since harvest has not yet started we will see what affect the rains have on the crop.

Heat wave has hit Canada, and Leamington, ON, saw a high of 71 yesterday. The remainder of this week and next week will see highs in the upper 60s and minimums in the upper 40s and low 50s. These temps are about 10 degrees above normal. These temps should help bring on the production of cucumbers and Bell peppers.

Above-average temps continue in Oregon and Washington -- about 15-20 degrees above normal in Hood River, OR, the Wenatchee Valley and the Yakima Valley.

The Weathermelon app offers consolidated lists of global growing regions for each commodity; a 10-day detail forecast for each region; current radar maps (U.S. only); estimated harvest start/end dates for each commodity; monthly average high/low temps for each region; and custom daily alerts for temperature, precipitation and severe weather based on 10-day forecasts.

(David Robidoux is a co-founder Weathermelon)