It is a decent threat, too. >> talk about the mechanics of the tidal measurements. among the many alerts that i have read, i can't pinpoint in my mind the last five hours i have been anchoring here where this one came from. there was a wind gauge in louisiana, it measured 148 miles per hour and it broke the measuring device. that wasn't even at full strength. >> it is rare that most can measure up to that point. we usually lose a lot of these meters when they get up to 80, 90, 100. rare ones survive up to 100. >> 148, all right, we are good on that one. let's go now to al roker. al joins us ...