8/3 Forecast

1. Pressure System

1. Surface Pressure

A high-pressure system forms south of the Korean Peninsula, bringing southerly to southwesterly winds.

By 21 KST, the peninsula enters the high-pressure zone with clear sky and stable conditions.
The North Pacific High expands, and the southern high moves north.

As a result, the Korean Peninsula mostly experiences clear sky.

2. 925hpa

The low-pressure system north of the Korean Peninsula is moving eastward and moving away.
A high-pressure system has formed over the peninsula, indicating the presence of a warm air flow.

At 21 KST, the 925 hPa geopotential height over the Korean Peninsula increased, with temperatures remaining high between 24 and 27°C. Meanwhile, the North Pacific High extended its influence westward.

3. 850hpa

Temperatures aloft over the Korean Peninsula show signs of slight moderation. As of 09 KST, most of the peninsula experiences temperatures between 18 and 21°C, with the eastern region seeing temperatures of 21 to 24°C.

A clockwise flow from the high-pressure system located south of the peninsula generates northwesterly winds.

The low-pressure system north of the peninsula has moved eastward and is expected to continue moving away, allowing the Korean peninsula to exit its influence.

2. Wind

850hpa Stream Line & Isotach

With a high pressure to the south and a low pressure to the north, winds generally flow from south to north over the Korean Peninsula.
Following the clockwise flow of the southern high, westerly to northwesterly winds dominate.

Though wind speeds remain weak, tighter streamlines compared to the 2nd indicate more organized airflow.

At 21 KST, a weak circulation appears southwest of the peninsula, signaling enhanced atmospheric stagnation.

3. Precipitation/ Humidity

Low possibility of precipitation overall

The Gyeongsang region is expected to have strong atmospheric instability due to convergence + wet layer+ low-layer jet presence + KI high.

850hPa Moisture Flux

Water flow from the south to the Korean Peninsula
Weak moisture zone only on the Gyeongsang
low possibility of precipitation development.

850hPa Streamline and Isotach

Strong wind formality with the inflow of southwest wind currents.
The region where the air currents converge is centered in the south, and a swirling rotation is also observed -> possibility of heavy rain

1000-500hPa Thickness & 700hPa T-Td

High temperature and humid tropical end influence zone with laminar thickening in the range of 5820-5880 gpm
Gyeongsang :possibility of precipitation

K-index

KI 30~ 38 levels across the Korean Peninsula → Slightly unstable to moderate overall.
K-Index 35-39 in south→ Atmospheric instability very high in southern regions, thunderstorm potential

4. Cloud

North-central Korean Peninsula (northeastern Gyeonggi and inland Gangwon):Low- to mid-level clouds are spread out → Possibility of light showers.

Chungcheong, Gyeongsang, and Jeju regions:Clouds appear clustered and then dispersing, suggesting localized convective clouds → Local showers are expected under otherwise relatively stable weather conditions.

5. Temperature

2024.08.03|09KST

As of 9 AM on August 3rd, following the dry adiabat line from the 850 hPa temperature on the thermodynamic chart down to the surface, the maximum temperature is expected to be approximately 32°C.