Diary of 1949 Typhoon Allyn: Part 1 – Preparing for the storm

If you missed it, read the introduction to this article.

Before we continue the narrative, one should have an understanding of the time conventions in these posts. The U.S. military uses time zones named by letter. The “Z” time zone is the same as the UTC, the Universal Time Coordinate, which is the time in …. Guam – in the Western Pacific – is in the “K” time zone. So times listed in the report as “K” refer to local time. For instance, 17:00K is 5 p.m. local time. To learn which letter your time zone corresponds to, visit this web page describing time zones. Keep in mind that the following spans a three hour period.

1949 Typhoon Allyn's path through the Pacific

1949 Typhoon Allyn’s path through the Pacific

Page 4: “Running diary of approach of Typhoon Allyn:

“Arrived at Harmon at 1145K on the 17th and set up shop. Things proceeding normally with winds increasing slightly. The nine light indicator at this station won’t last too long from the indications. It is warbling loudly and the count of the flashes at this time is impossible.

“1315K: Wind has now picked up considerably and the reports from North indicate that they are abandoning the station as the radar tower is about to topple over. We are estimating the winds at this time and cross checking with the Navy. The wind at Harmon is now tearing the inflight kitchen apart. The pressure is falling ominously. We are taking readings every 15 minutes and estimating the wind every 5 min. Also, setting up to take readings with the sling psychrometer and trying to keep an accurate count of all the happenings as they occur.

“1322K: A piece of wiod just went down the ramp must have been a 6×6 and 10 feet long.

“1325K: The rawin tower is no longer visible. Winds must be in the vicinity of 70 knots [80 mph] at this time.

“1336K: [A] communication man just came in and said that JMP is going off the air. They are evacuating the station. We are now out of contact with the rest of the Pacific area.

“1355K: Winds are really beginning to blow now. It is whistling thru all the wires, and the poles next to the stations have quite a list to them. Estimating the winds at 60 knots at this time. Wind tee is hanging on by shreds. Communications are out as they have evacuated both the Weather Central and Guam Broadcast stations, so we are out of contact with everyone but Navy. Rain is coming down in sheets and visibility is getting bad. Visibility at 1/2 mile at this time.

“1420K: Low scud 200 feet [high covering] about eight tenths [of the sky] and [completely overcast] stratocumulus clouds just above, moving beter than 50 knots. Antenna pole at the edge of the building now has a 6 foot oscillation.


About K Knapp

I am a meteorologist at NOAA’s National Climatic Data Center in Asheville, NC. My research interests include using satellite data to observe hurricanes, clouds, and other climate variables. *******Disclaimer******* The opinions expressed in these blogs are mine only. They do not necessarily reflect the official views or policies of NOAA, Department of Commerce, or the US Government.

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