empty wind data on todays date on 10 forecast?

Hello, Im new to this API thing and I run into an issue with the following api call http://api.wunderground.com/api/key/f...

for the past 2 days, at around 4pm HST the wind data for todays date in the "simpleforecast/forecastday" is coming out like this

"maxwind": {
"mph": 0,
"kph": 0,
"dir": "",
"degrees": 0
},
"avewind": {
"mph": 0,
"kph": 0,
"dir": "",
"degrees": 0
}

is this normal?