ENSO neutral pattern prevails after three consecutive years of La Ni a, bringing a drier pattern to Micronesia and the Marshall islands.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GUM wrote it up.
ENSO neutral pattern prevails after three consecutive years of La Ni a, bringing a drier pattern to Micronesia and the Marshall islands.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Guam wrote its last area forecast discussion before the first event at Mar 20, 7:38 AM UTC, 6 hours 22 minutes earlier.
Area Forecast Discussion National Weather Service Tiyan GU 538 PM ChST Mon Mar 20 2023 .Marianas Synopsis... Satellite showing mostly cloudy skies with scattered showers. A few lightning strikes to the south and east of the coastal waters have been observed by lightning detection. Buoys and latest altimetry passes are indicating combined seas of 4 to 6 feet. && .Discussion... A slow moving surface trough will bring showers over the next couple days. Scattered showers expected at times, especially over Guam and Rota as moisture continues to pull north. Seen a few strikes off to our south and east and have included the potential for thunderstorms in the forecast, but coverage should be isolated at best. Shower potential expected to diminish from east to west later Wednesday and Wednesday night trough flattens and pushes east. Much drier air expected through the rest of the period as trade swell builds in. Isolated showers possible with passing wrinkles in the trades. The bulk of showery activity will forced south of the Marianas with the trade convergence. Some mostly cloudy skies and low end scattered showers possible for Guam and Rota if this area of convergence drifts north. && .Marine... Gentle to moderate winds will increase over next 24-36 hours and become moderate to fresh by Wednesday and continue through the end of the week. Combined seas 4 to 6 feet through Tuesday night will begin to increase on Wednesday as a trade swell builds in. Seas will build to 6 to 8 feet, possibly 9 feet, by Thursday. Surf heights will also increase. Not expecting high surf criteria to be reached, but could see a high risk of rip currents for north and especially east facing reefs. && .Eastern Micronesia... A weak trade convergence has developed near Majuro with overall spotty showers associated with this feature. Heavy showers look minimal near Majuro but further east we're seeing a bit more convective clouds which we may see by tomorrow afternoon. This feature is expected to push west into Kosrae and Pohnpei and will be enhanced from divergence aloft. Also with a weak circulation currently southwest of Jaluit, expect increasing showers activity as it approached Kosrae. Models hint at gusty winds mid week for Pohnpei. Altimetry indicates seas around 6 ft near Pohnpei and east of Majuro. North to northeast swell is dropping slightly, then Tuesday night is expected to increase again, but more northeasterly than northerly, expecting surf to be a bit short of advisory criteria. && .Western Micronesia... A surface trough east of Yap is generating scattered showers and isolated thunderstorms near Yap. Expect scattered showers for the rest of the week starting tomorrow for Koror as the trough transits through. Same for Yap, except we may see better weather near the weekend for Yap as the system passes through. More or less on and off scattered showers through this week due to trade wind convergence and weak disturbances passing through this area. Fair weather for Chuuk until Tuesday evening, conditions will start to deteriorate through the end of the week with a slight decrease in shower potential for the weekend. Mostly moderate winds for the week. Altimetry indicates 4 to 6 feet for all islands, we may see a slight increase seas reaching up to 7 or 8 around the late period of the week due to increasing northeast swell. && .GUM WATCHES/WARNINGS/ADVISORIES... GU...None. MP...None. Marianas Waters...None. && Marianas: Slagle Micronesia: Hong
1 drought. Local standard time, as filed.
Wotje's drought classification was changed from moderate drought (D1) to severe drought (D2) after 6 consecutive weeks of no rain. Wotje has had no rainfall during the month of March, 1.30 inches during Feb, and less than 4 inches in January.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Guam in 2023Every state in 2023This day in weather historyWarnings in Guam, March 2023
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1090547.