Convective Cumulus

Wednesday, May 27, 2015

This cumulus tower was located northeast of the town of Postville, in northeastern Iowa at 4:07 PM CDT on Sunday, May 17, 2015. The Storm Prediction Center (SPC) had earlier in the day posted an Enhanced Risk for this area, but downgraded it to Slight before this image was captured. The building at right background is a Cenex convenience store on West Tilden Street (US Highway 18).

The image above is the same cell as the top photo, but much farther away-about 23 miles distant in northern Allamakee County, Iowa. Time was 4:15 PM. The scene was viewed on US Highway 52  from about 2.6 miles SE of Postville. The structure of the storm cell reminded me very much of the atomic bomb test mushroom cloud photo taken during Operation Crossroads at Bikini Atoll in 1946.

This image was captured along US Highway 52 about a minute after the middle shot was taken. Nikon
D5000 DSLR camera.


Altocumulus Spring Sky

Saturday, May 16, 2015

A pronounced altocumulus undulatus sky graced a very springlike landscape in Bowman Woods
Park in Cedar Rapids, Iowa around 8:35 am CDT, on Saturday, May 2, 2015. This type of cloud
formation is often a harbinger for precipitation, and indeed rain arrived here about 24 hours later. Nikon D5000 DSLR.


Rainy Construction Zone

Monday, May 11, 2015

A line of thundershowers with intermittent heavy rain passed through the Des Moines metro area just after 4:00 pm CDT on Sunday, May 11, 2015. This view, eastbound in a construction zone on Interstate 80 near the Altoona, Iowa exit, shows those conditions at 4:23 pm. Temperature was 68
degrees with a 63 degree dew point. Two and a half hours after this line passed through, several weak tornadoes dropped in northwest Iowa. Nikon D5000 DSLR.


May 6 Northern Linn County Iowa Garden Variety Thunderstorm

Thursday, May 7, 2015

A thin and weak line of approaching thunderstorms produced these rain shafts around 3:57 pm CDT,
Wednesday, May 6, 2015. The location here was at the entrance of Wendling Quarries, about 1.8
miles SE of Troy Mills, Iowa in northern Linn County. The camera looks west.

Another view of the line of storms, this time looking SW from Hitaga Road, about .2-mile north of
Paris Road (County Road D66) in northern Linn County. Time was 4:19 pm.

This image was captured looking SW at 4:25 pm, just as the rains began to fall. Location was Justins Road at North Alburnett Road (County Road W58), northwest of Central City, Iowa. Nikon D5000
DSLR camera.


Up Through The Blossoms

Thursday, April 30, 2015

Spring means flowering plants. These views around 4:15 pm CDT on Thursday, April 30, 2015 look
straight up at a blue sky through the branches of an apple tree, laden with beautiful white blossoms. Location was near Bowman Woods Park in Cedar Rapids, Iowa. Nikon D5000 DSLR camera.


April 9 Volatile Day

Saturday, April 18, 2015

Conditions in the Cedar Rapids, Iowa metropolitan area at noon on Thursday, April 9, 2015 were of an eerie sun/light fog mix. Temperature and dew point were both at 55 degrees and humidity was 100%. The photo above, captured at Progress Drive at Martha's Way in Hiawatha, Iowa attests to this. Google Nexus 4 camera.

Further south and three and a half hours later, things were really ramping up. The image above looks west from the SE flank of an approaching tornado-warned cell as seen from Yucca Avenue at Highway 92, about two miles east of Ainsworth, Iowa in Washington County.

This image is a video frame capture and looks southeast from 175th Street, .1-mile east of US Highway 218 in Washington County. Heavy rain and penny size hail with wind from the arrived tornado-warned cell is shown at 4:14 PM CDT.

Looking northeast at the retreating severe weather, this image was captured on 150th Street at Underwood Avenue, .25-mile east of US Highway 218 at 4:40 PM. An especially intense part of the system can be seen at far left. Nikon D5000 DSLR.

This map portion of Washington County plots my spotting positions in the second, third and fourth images above, corresponding to location numbers 1, 2 and 3.


April 9 Tornado-Warned Cell Panorama

Thursday, April 16, 2015

The above photo is a two-image stitched panorama of a tornado-warned cell as it approached my spotter location on 175th Street, .2-mile east of US Highway 218 in NE Washington County Iowa.
Time and date: 4:05 PM CDT, Thursday, April 9, 2015. The panorama was created in Adobe Bridge. The right portion of the image, which looks NW, contained an intense hail core. The left portion of the cell visible in the image passed over my position, dropping penny size hail with a deluge of rain. Nikon D5000 DSLR.

The radar image shown above corresponds to the photo at top. The white dot indicates my spotter position.


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