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10

January/February 2018^ DISCOVER^21

CLOCKWISE FROM TOP: NATIONAL WEATHER SERVICE; NICK OZA/USA TODAY NETWORK/SIPA USA; JOE RAEDLE/GETTY IMAGES

Harvey Redesigns

Rainfall Maps

❯

AS HURRICANE

HARVEY’S

AFTERMATH

dumped rain on the

Houston area in August,

the staff at the National

Weather Service (NWS)

knew they were watching

history. And as the rain

totals were tallied, the

agency added not one,

but two new colors to its

rainfall map: purple for

20 to 30 inches and light

pink for over 30 inches.

“It’s difficult to predict

what has never happened,”

says Greg Carbin, who

leads the NWS Forecast

Operations Branch in

College Park, Maryland.

“I hope we don’t have to

use it again.” The total?

Nearly 52 inches in a week

in Cedar Bayou, Texas, a

record in the continental

U.S.  DEVI SHASTRI

Over 30 inches

20-30 inches

Water floods a Houston street (left) after Hurricane

Harvey landed in late August. Hospitals and care

centers, such as the Gulf Health Care Center in Port

Arthur, Texas (above), worked to evacuate patients.