Chinook

This was tweeted by Chris Bianchi (@BianchiWeather). This must have been what the NHC was referring to.. wind gust of 128mph. wait a second, that's 138mph. sustained wind of 103mph.

station LTBV3, a national buoy system station (possibly at the beach) on St. Croix. monitor the gusts and barometric pressure plot. Pressure plot should get a lot more extreme! http://www.ndbc.noaa.gov/station_page.php?station=LTBV3

St Croix airport - 49 mph gusting to 85mph. That's the first observation over hurricane force gusts. METAR: TISX 200200Z 03044G74KT 1/2SM +RA FG VV014 25/25 A2924 RMK AO2 PK WND 02064/0157 PRESFR P0014 T02500250 $

St. Croix airport, peak wind 60 kt (69 mph) from NNE

One confirmation of a tornado in the last few minutes * Tornado Warning for... Southwestern Spink County in northeastern South Dakota... * Until 815 PM CDT * At 740 PM CDT, a confirmed tornado was located near Spottswood, or 12 miles south of Redfield, moving northeast at 35 mph. HAZARD...Damaging tornado and quarter size hail. SOURCE...Weather spotters confirmed tornado.

Just wanted to show this hi-res GOES-16 image of hurricane Maria from earlier (14:44z) - image processed at CIRA, Fort Collins, CO. Retweeted by Dan Lindsey, who probably set up the system to make the looping image.

Irma's landfall on Florida mainland was 1938z, sounds like daylight, 3:38PM

Irma's track was between St. Martin /Sint Maarten and Tortola, British Virgin Islands, which, if I remember correctly, both got hit by the eyewall of Irma. This means that Irma was about 79 nautical miles or 91 miles northeast at the point of Irma's track closest to Maria's current location

Oranjestad, Sint Eustatius, Netherlands Antilles is getting 28 kt gusting to 52 kt (greater than 50 kt is a storm-force or a severe thunderstorm). St. Croix Airport has weaker winds now, but will soon be going up.

St. Croix is now getting 20 kt gusting to 33 kt wind - almost a tropical storm. They are in the light rain.

Most recent recon data plot from Maria (Tropical tidbits data plots) shows the pressure may be closer to 910mb than 925mb. 914.6mb on the other zoomed in data plot. What will the official center fix pressure? 916mb? Is this lower than Hurricane Irma had at any point? I think it's close. Did Irma get to 915 or 916 mb?

The latest HRRR shows several storms developing in this area. Many of them seem to be linear-- there are no highly intense updraft helicity tracks. I think tornadoes are possible, but there probably won't be many. I think there will be few reports of 2"-3" hail, probably several reports of 1"-2" hail and wind damage.

Here is kind of a beautiful visible image of hurricane Jose. This is not super well organized, and it has spent much of the last 24 hrs appearing as a comma-shaped mid-latitude storm, but it is still tropical. The hurricane hunters have found a couple of spots of 65 kt winds aloft, and it's not really in an eyewall, because there is no eyewall

The snow guns from Alpine Valley Ski Area are pointing directly at NWS White Lake office, which is also near highway M-59. That's how they get the snow.

This is an article about how the NWS fixed the wind chill index in 2001. This story is about engineer Maurice Bluestein from Indianapolis, who realized the old wind chill index was wrong, and did something about it. https://www.nytimes.com/2017/09/14/science/maurice-bluestein-who-modernized-the-wind-chill-index-dies-at-76.html?smid=tw-nytimesscience&smtyp=cur