Flash Flood Warning — Ulster County, NY 12:00 AM

Ulster County, New York, United States

Last updated: 9:14 PM CDT  ·  Refresh
20°C
Feels like 22°
Rain
▲ 22°  /  ▼ 16°
Wind
4 mph SSW
Humidity
97%
Dew Point
20°
Pressure
28.73 inHg
Visibility
7 mi
UV Index
0.0
Cloud Cover
90%
Sunrise
5:40 AM
Sunset
8:26 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Ulster County is currently rain at 20°C. Precipitation is likely — peak probability 68% around 10 PM. Atmospheric instability is elevated (CAPE up to 531 J/kg) — isolated convective development possible. Sunrise: 5:40AM · Sunset: 8:26PM.

Alerts

Flash Flood Warning
Ulster County, NY
Expires 12:00 AM
79 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
20°
68%
11 PM
19°
60%
12 AM
19°
30%
1 AM
19°
26%
2 AM
19°
36%
3 AM
19°
25%
4 AM
19°
16%
5 AM
17°
17%
6 AM
18°
20%
7 AM
18°
13%
8 AM
19°
8%
9 AM
21°
8%
10 AM
21°
7%
11 AM
22°
5%
12 PM
22°
5%
1 PM
23°
3%
2 PM
24°
3%
3 PM
23°
3%
4 PM
23°
3%
5 PM
24°
3%
6 PM
23°
3%
7 PM
22°
3%
8 PM
21°
3%
9 PM
19°
3%
7-Day Forecast
Tonight
22° 16°
Rain, 68% chance.
Wed
24° 13°
Mostly Clear with a 26% chance of rain.
Thu
26° 10°
Partly Cloudy.
Fri
27° 11°
Mostly Clear.
Sat
26° 14°
Clear.
Sun
26° 13°
Rain, 70% chance.
Mon
29° 16°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 20° Rain 68% 4 mph SSW 97%
11 PM 19° Overcast 60% 4 mph SW 96%
12 AM 19° Overcast 30% 5 mph SW 96%
1 AM 19° Mostly Cloudy 26% 6 mph SSW 96%
2 AM 19° Mostly Cloudy 36% 6 mph SW 95%
3 AM 19° Mostly Cloudy 25% 6 mph SW 95%
4 AM 19° Mostly Cloudy 16% 7 mph SW 95%
5 AM 17° Mostly Cloudy 17% 7 mph SW 94%
6 AM 18° Mostly Cloudy 20% 7 mph SW 91%
7 AM 18° Partly Cloudy 13% 7 mph SW 89%
8 AM 19° Partly Cloudy 8% 7 mph WSW 84%
9 AM 21° Mostly Clear 8% 7 mph WSW 78%
10 AM 21° Mostly Clear 7% 8 mph WSW 72%
11 AM 22° Mostly Clear 5% 9 mph W 66%
12 PM 22° Clear 5% 10 mph W 60%
1 PM 23° Clear 3% 11 mph W 56%
2 PM 24° Clear 3% 11 mph W 52%
3 PM 23° Clear 3% 11 mph W 51%
4 PM 23° Mostly Clear 3% 11 mph W 50%
5 PM 24° Mostly Clear 3% 10 mph W 49%
6 PM 23° Mostly Clear 3% 9 mph W 52%
7 PM 22° Partly Cloudy 3% 8 mph W 56%
8 PM 21° Partly Cloudy 3% 8 mph WNW 59%
9 PM 19° Partly Cloudy 3% 8 mph WNW 62%
15-Day Forecast
Today
7/21
Rain
68%
16°
22°
Wed
7/22
Mostly Clear
26%
13°
24°
Thu
7/23
Partly Cloudy
3%
10°
26°
Fri
7/24
Mostly Clear
3%
11°
27°
Sat
7/25
Clear
3%
14°
26°
Sun
7/26
Rain
70%
13°
26°
Mon
7/27
Rain
71%
16°
29°
Tue
7/28
Rain
63%
15°
23°
Wed
7/29
Rain
68%
13°
24°
Thu
7/30
Drizzle
44%
13°
26°
Fri
7/31
Drizzle
60%
13°
29°
Sat
8/1
Drizzle
60%
14°
29°
Sun
8/2
Drizzle
60%
14°
25°
Mon
8/3
Drizzle
60%
16°
26°
Tue
8/4
Drizzle
60%
16°
26°
79
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
79 AQI 23.9 µg/m³
O3
Ground-level ozone
40 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 79 Moderate 40 79
Thu 31 Good 29 31
Fri 31 Good 31 24
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Tue Jul 21, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE131 J/kg
MLCAPE301 J/kg
MUCAPE445 J/kg
SBCIN-90 J/kg
MLCIN0 J/kg
Lifted Index-0.9
Kinematics
0–6 km Shear48 kt
0–1 km Shear22 kt
Eff. Shear40 kt
0–1 km SRH-32
0–3 km SRH-92
Eff. SRH-92
Storm Motion217° @ 42 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.1
Thermo & Levels
PWAT1.67 in
0–3 km LR4.6 °C/km
700–500 LR5.8 °C/km
Total Totals46.7
LCL967 hPa
LFC677 hPa
EL385 hPa
Freezing Lvl13,202 ft