Guam, 2020

Drought in Guam, August 1 to 31, 2020

August 1 to 31, 2020 · NWS GUM · 4 events in 4 counties and zones

Drought continues in a few location across Micronesia.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
4

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.

What happened

The episode as NWS GUM wrote it up.

Drought continues in a few location across Micronesia.

What forecasters said that day

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 Jul 31, 7:56 AM UTC, 6 hours 4 minutes earlier.

Area forecast discussion, Jul 31, 7:56 AM UTC, 6 hours 4 minutes before
Area Forecast Discussion
National Weather Service Tiyan GU
556 PM ChST Fri Jul 31 2020

.Marianas Synopsis...
Latest surface analysis shows a surface trough moving through the
region with isolated showers and thunderstorms evident in satellite
imagery. Buoys show seas between 3 and 5 feet across the region.

&&

.Discussion...
The trough moving through the region tonight will continue to spark
isolated thunderstorms along with a small increase in showers
overnight. By Saturday, though, have made a few forecast adjustments
to reflect a slightly drier forecast, keeping showers isolated
through the weekend and through next week. An upper-level low to the
east is expected to move westward over the region this weekend and
will support some short-lived thunderstorms into Sunday, but the lack
of any surface-based convective mechanisms suggests the overall
weather should be fairly pleasant. A benign trade-wind pattern will
set up over the region early next week before moisture edges back
into the region from the south as weak disturbances move westward
through Micronesia.

&&

.Marine...
Seas of 3 to 5 feet will persist through the weekend gradually
increasing to between 4 and 6 feet Monday and Tuesday as a trade-wind
pattern becomes more firmly entrenched over the area.

&&

.Eastern Micronesia...
The combination of an active ITCZ and surface trough will bring
scattered showers and isolated thunderstorms to Pohnpei and Kosrae
tonight. The cross-equatorial flow will end by Saturday and this will
allow showers to decrease at these two locations. A surface trough
moving across the Date Line will bring scattered showers and isolated
thunderstorms to Majuro Saturday and Saturday night. This trough will
weaken as it moves westward, but activity associated with it will
briefly increase and bring scattered showers and isolated
thunderstorms to Pohnpei Monday.

&&

.Western Micronesia...
A surface trough brought scattered showers and isolated thunderstorms
to Palau and Yap today. The trough has moved west of these two
locations and taken much of the showers with it. The trough is,
however, close enough to keep clouds and showers over Palau and Yap.
A few thunderstorms are also possible tonight at Yap. Another surface
trough will push across the western half of Micronesia and bring
scattered showers and isolated thunderstorms to Yap Saturday night
through Sunday and to Palau Sunday and Sunday night. A repeat of this
activity will occur Tuesday and Wednesday at Yap and Wednesday over
Palau as yet another surface trough will bring scattered showers and
isolated thunderstorms.

Models show the ITCZ becoming active near Chuuk and this will bring
scattered showers and isolated thunderstorms to that location
Saturday night and again on Monday and Tuesday.

&&

.GUM WATCHES/WARNINGS/ADVISORIES...
GU...None.
Marianas Waters...None.
&&

W. Aydlett/Ziobro

Event by event

4 drought. Local standard time, as filed.

Drought, Micronesia

When
August 1, 12:00 AM GST to August 31, 11:59 PM GST
Where
Micronesia forecast zone
Reported by
Official NWS Observations

Kapingamarangi did decrease to the Moderate Drought (D1) level in the month but increased again to Severe Drought (D2). Observers on Kapingamarangi report household water tanks are 10% of capacity and some are empty. Some of the community water tanks have been tapped. Vegetation has started yellowing. Rainfall at Kapingamarangi was 28% of normal.

Drought, Marshall Islands

When
August 1, 12:00 AM GST to August 31, 11:59 PM GST
Where
Marshall Islands forecast zone
Reported by
Official NWS Observations

Wotje went from Extreme Drought (D3) to Severe Drought (D2). Recent heavy rainfall has resulted in improved drought conditions at Wotje and Utirik.

Drought, Saipan

When
August 1, 12:00 AM GST to August 31, 11:59 PM GST
Where
Saipan forecast zone
Reported by
Official NWS Observations

Saipan and Tinian went from Extreme Drought(D3) to Severe Drought (D2)due to recent heavier rainfall amounts, the drought conditions across the CNMI have improved.

Drought, Rota

When
August 1, 12:00 AM GST to August 31, 11:59 PM GST
Where
Rota forecast zone
Reported by
Official NWS Observations

Rota went from Extreme Drought(D3) to Severe Drought (D2)due to recent heavier rainfall amounts, the drought conditions across the CNMI have improved.

What these are

Drought
A drought reaching severe (D2) or worse on the US Drought Monitor, or with notable impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Guam in 2020Every state in 2020This day in weather historyWarnings in Guam, August 2020

Sources

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: 920234, 920235, 920236, 920238.