Flash Flood Warning — New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA 7:45 PM Areal Flood Watch 1:00 AM

New Castle County, Delaware, United States

Last updated: 4:28 PM CDT  ·  Refresh
28°C
Feels like 31°
Mostly Cloudy
▲ 28°  /  ▼ 22°
Wind
7 mph SW
Humidity
80%
Dew Point
24°
Pressure
29.67 inHg
Visibility
9 mi
UV Index
3.7
Cloud Cover
82%
Sunrise
5:52 AM
Sunset
8:25 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: New Castle County is currently mostly cloudy at 28°C. Precipitation is likely — peak probability 90% around 6 PM. Atmospheric instability is elevated (CAPE up to 1921 J/kg) — isolated convective development possible. Sunrise: 5:52AM · Sunset: 8:25PM.

Alerts

Flash Flood Warning
New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
Expires 7:45 PM
Areal Flood Watch
Expires 1:00 AM
65 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
70%
6 PM
27°
90%
7 PM
26°
90%
8 PM
25°
59%
9 PM
24°
67%
10 PM
24°
66%
11 PM
24°
69%
12 AM
23°
74%
1 AM
23°
67%
2 AM
23°
53%
3 AM
23°
53%
4 AM
22°
59%
5 AM
22°
39%
6 AM
22°
40%
7 AM
23°
46%
8 AM
24°
50%
9 AM
24°
44%
10 AM
25°
39%
11 AM
26°
35%
12 PM
27°
31%
1 PM
28°
28%
2 PM
28°
24%
3 PM
28°
24%
4 PM
29°
25%
7-Day Forecast
Today
28° 22°
Mostly Cloudy with a 70% chance of rain.
Wed
30° 20°
Partly Cloudy with a 53% chance of rain.
Thu
29° 18°
Partly Cloudy.
Fri
28° 17°
Partly Cloudy with a 38% chance of rain.
Sat
29° 17°
Drizzle, 50% chance.
Sun
30° 17°
Rain, 81% chance.
Mon
31° 19°
Drizzle, 68% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Mostly Cloudy 70% 7 mph SW 80%
6 PM 27° Overcast 90% 6 mph SSW 90%
7 PM 26° Overcast 90% 9 mph S 93%
8 PM 25° Rain 59% 10 mph SSW 93%
9 PM 24° Heavy Rain 67% 12 mph SSW 93%
10 PM 24° Heavy Rain 66% 11 mph SW 93%
11 PM 24° Heavy Rain 69% 10 mph SW 93%
12 AM 23° Rain 74% 8 mph SW 93%
1 AM 23° Overcast 67% 8 mph SSW 93%
2 AM 23° Drizzle 53% 10 mph SSW 93%
3 AM 23° Mostly Cloudy 53% 10 mph SSW 94%
4 AM 22° Mostly Cloudy 59% 10 mph SSW 94%
5 AM 22° Partly Cloudy 39% 9 mph SSW 94%
6 AM 22° Partly Cloudy 40% 9 mph SW 92%
7 AM 23° Mostly Clear 46% 9 mph SW 91%
8 AM 24° Mostly Clear 50% 10 mph WSW 88%
9 AM 24° Mostly Clear 44% 10 mph WSW 82%
10 AM 25° Mostly Clear 39% 10 mph W 77%
11 AM 26° Mostly Clear 35% 11 mph W 72%
12 PM 27° Mostly Clear 31% 10 mph W 70%
1 PM 28° Mostly Clear 28% 10 mph W 67%
2 PM 28° Mostly Clear 24% 10 mph W 65%
3 PM 28° Mostly Clear 24% 10 mph W 64%
4 PM 29° Partly Cloudy 25% 10 mph W 63%
15-Day Forecast
Today
7/21
Mostly Cloudy
70%
22°
28°
Wed
7/22
Partly Cloudy
53%
20°
30°
Thu
7/23
Partly Cloudy
13%
18°
29°
Fri
7/24
Partly Cloudy
38%
17°
28°
Sat
7/25
Drizzle
50%
17°
29°
Sun
7/26
Rain
81%
17°
30°
Mon
7/27
Drizzle
68%
19°
31°
Tue
7/28
Drizzle
60%
19°
29°
Wed
7/29
Drizzle
60%
18°
28°
Thu
7/30
Drizzle
60%
19°
30°
Fri
7/31
Drizzle
60%
19°
29°
Sat
8/1
Drizzle
60%
19°
29°
Sun
8/2
Drizzle
60%
19°
31°
Mon
8/3
Drizzle
60%
20°
30°
Tue
8/4
Drizzle
60%
20°
32°
65
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
65 AQI 16.6 µg/m³
O3
Ground-level ozone
38 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 65 Moderate 38 65
Thu 45 Good 42 45
Fri 49 Good 49 45
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, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2384 J/kg
MLCAPE1452 J/kg
MUCAPE2384 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.6
Kinematics
0–6 km Shear39 kt
0–1 km Shear15 kt
Eff. Shear40 kt
0–1 km SRH-16
0–3 km SRH-65
Eff. SRH-65
Storm Motion213° @ 33 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.2
Thermo & Levels
PWAT2.13 in
0–3 km LR6.4 °C/km
700–500 LR5.2 °C/km
Total Totals47.0
LCL946 hPa
LFC1005 hPa
EL170 hPa
Freezing Lvl14,311 ft