Tornado Watch 8:00 PM Tornado Watch 8:00 PM Flash Flood Warning — New Castle County, DE 7:45 PM Flash Flood Warning — Kent County, DE, New Castle County, DE 10:00 PM Flood Watch 1:00 AM

New Castle County, Delaware, United States

Last updated: 6:25 PM CDT  ·  Refresh
24°C
Feels like 27°
Rain
▲ 29°  /  ▼ 21°
Wind
8 mph SSW
Humidity
94%
Dew Point
22°
Pressure
29.66 inHg
Visibility
9 mi
UV Index
1.1
Cloud Cover
92%
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 rain at 24°C. Precipitation is likely — peak probability 90% around 7 PM. Atmospheric instability is elevated (CAPE up to 1226 J/kg) — isolated convective development possible. Sunrise: 5:52AM · Sunset: 8:25PM.

Alerts

Tornado Watch
Expires 8:00 PM
Tornado Watch
Expires 8:00 PM
Flash Flood Warning
New Castle County, DE
Expires 7:45 PM
Flash Flood Warning
Kent County, DE, New Castle County, DE
Expires 10:00 PM
Flood Watch
Expires 1:00 AM
65 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
90%
8 PM
24°
82%
9 PM
24°
81%
10 PM
24°
66%
11 PM
24°
49%
12 AM
23°
71%
1 AM
23°
53%
2 AM
23°
51%
3 AM
22°
61%
4 AM
22°
62%
5 AM
21°
53%
6 AM
22°
56%
7 AM
22°
58%
8 AM
23°
52%
9 AM
24°
37%
10 AM
25°
42%
11 AM
26°
39%
12 PM
26°
41%
1 PM
27°
42%
2 PM
28°
36%
3 PM
28°
36%
4 PM
28°
36%
5 PM
28°
37%
6 PM
28°
41%
7-Day Forecast
Tonight
29° 21°
Rain, 90% chance.
Wed
29° 21°
Partly Cloudy with a 62% chance of rain.
Thu
28° 19°
Mostly Clear with a 26% chance of rain.
Fri
28° 18°
Mostly Clear with a 33% chance of rain.
Sat
28° 17°
Drizzle, 51% chance.
Sun
29° 18°
Rain, 71% chance.
Mon
30° 20°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Rain 90% 7 mph SSW 93%
8 PM 24° Rain 82% 11 mph SSW 94%
9 PM 24° Heavy Rain 81% 9 mph SSW 93%
10 PM 24° Heavy Rain 66% 8 mph SW 93%
11 PM 24° Overcast 49% 8 mph SW 93%
12 AM 23° Rain 71% 10 mph SW 93%
1 AM 23° Drizzle 53% 11 mph SW 93%
2 AM 23° Drizzle 51% 10 mph SSW 93%
3 AM 22° Drizzle 61% 9 mph SSW 94%
4 AM 22° Rain 62% 9 mph SSW 95%
5 AM 21° Rain 53% 8 mph SSW 96%
6 AM 22° Rain 56% 8 mph SW 93%
7 AM 22° Partly Cloudy 58% 8 mph SW 90%
8 AM 23° Mostly Clear 52% 9 mph WSW 87%
9 AM 24° Mostly Clear 37% 10 mph WSW 83%
10 AM 25° Mostly Clear 42% 10 mph W 78%
11 AM 26° Mostly Clear 39% 10 mph W 73%
12 PM 26° Mostly Clear 41% 10 mph W 70%
1 PM 27° Mostly Clear 42% 10 mph W 67%
2 PM 28° Mostly Clear 36% 10 mph W 65%
3 PM 28° Mostly Clear 36% 9 mph W 63%
4 PM 28° Mostly Clear 36% 9 mph W 62%
5 PM 28° Partly Cloudy 37% 9 mph W 62%
6 PM 28° Partly Cloudy 41% 7 mph W 65%
15-Day Forecast
Today
7/21
Rain
90%
21°
29°
Wed
7/22
Partly Cloudy
62%
21°
29°
Thu
7/23
Mostly Clear
26%
19°
28°
Fri
7/24
Mostly Clear
33%
18°
28°
Sat
7/25
Drizzle
51%
17°
28°
Sun
7/26
Rain
71%
18°
29°
Mon
7/27
Drizzle
60%
20°
30°
Tue
7/28
Drizzle
63%
19°
29°
Wed
7/29
Drizzle
68%
18°
28°
Thu
7/30
Drizzle
68%
19°
29°
Fri
7/31
Drizzle
46%
19°
29°
Sat
8/1
Drizzle
60%
19°
29°
Sun
8/2
Drizzle
60%
19°
30°
Mon
8/3
Drizzle
60%
20°
30°
Tue
8/4
Drizzle
60%
20°
31°
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, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE654 J/kg
MLCAPE1155 J/kg
MUCAPE1612 J/kg
SBCIN-79 J/kg
MLCIN0 J/kg
Lifted Index-3.3
Kinematics
0–6 km Shear40 kt
0–1 km Shear22 kt
Eff. Shear43 kt
0–1 km SRH40
0–3 km SRH18
Eff. SRH18
Storm Motion222° @ 33 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.2
STP (eff)0.1
Supercell0.6
K-Index41.6
Thermo & Levels
PWAT2.48 in
0–3 km LR5.0 °C/km
700–500 LR5.8 °C/km
Total Totals50.1
LCL980 hPa
LFC761 hPa
EL222 hPa
Freezing Lvl14,209 ft