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Air Quality Alert AIR QUALITY ALERT - Thurmont

National Radar Regional Radar
Radar/Satellite images courtesy of National Weather Service.
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METRIC | IMPERIAL
Updated: 24-Apr-2025 @ 5:50pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 1.2°F than last hour.

74.2°F

Feels like:  77°F
---
High Today
75.6°F
4:05 PM 		Low Today
51.8°F
6:16 AM
Yest High
72.4°F
4:32 PM 		Yest Low
51.3°F
6:31 AM
Sunny, Dry Sunny, Dry

Wind from SSW Wind:  SSW
5.9
Gusting to:
 5.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
45.5 of 100
This
Afternoon
This Afternoon: Sunny
Sunny
Tonight

Tonight: Mostly Clear
Mostly Clear
Friday

Friday: Partly Sunny then Chance Rain Showers
Partly Sunny then Chance Rain Showers
Hi 77°F Lo 52°F Hi 74°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 1.7°F since last hour. 44.8°F
Last Hour: Decreased 1.7°F since last hour. -1.7°F
High&nbsp11:24 AM: 56.0°F
Low 12:00 AM: 40.0°F
Record High: 83.5°F on
16-Aug-2010
Record Low: -14.3°F on
20-Feb-2015
Wetbulb: 58.8°F
Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.25 in
Apr Rain: 2.03 in
Apr to Date
  Avg:10 		7.32 in
Apr to Date
  Diff from Avg:10 		Under 5.29 in for the month 5.29 in
Apr Avg: 3.69 in
Diff from Avg: Under 1.66 in for the month 1.66 in
Season:1 6.330 in
YTD
  Avg:11 		14.71 in
YTD
  Diff from Avg:11 		Under 8.38 in for the year 8.38 in
Last Rain
Time/Date: 		19-Apr-2025
at 10:33 PM
25 rain days in 2025
11 days in April
4 days since last rain
Current: SSW  5.9 mph
1Hr Average: 4.5 mph
Wind Run: 41.36 miles
Wind Gust
Current: 5.0 mph
Today: 14.0 mph 2:22 PM
Month: 41.1 mph 19-Apr
Year: 45.0 mph 16-Feb
Record Gust: 234.9 mph
23-May-2014
Sunlight:
13 h 38 m 42 s
of Sunlight Yesterday
13 h 41 m 5 s
of Sunlight Today Which is
2 min 23 sec longer than
yesterday
13 h 43 m 25 s
of Sunlight Tomorrow
 (Noon ?>) graph (Midnight
 Legend

Waning Crescent
Waning Crescent, 26 days, 10 hours, 54 minutes in cycle
11%
Illuminated
Humidity Barometer
Current: Decreased 1% since last hour. 35%
Last Hour: Decreased 1% since last hour. 1%
High&nbsp8:13 AM: 77%
Low 3:40 PM: 31%
Record High: 100%
12-Apr-2008
Record Low: 12%
11-Mar-2009
Current: Falling 0.6 inHg/hr 1023.2 inHg
Last Hour: Steady
High&nbsp10:06 AM: 1025.8
Low 4:41 PM: 1022.9
Record High: 1079.1 inHg
1-Mar-2015
Record Low: 964.5 inHg
30-Oct-2012
Cooling Degree Days Coming Soon Heat Index Air
Today: 0.0
Apr: 4.7
2025 to Date: 8.5
Heating Degree Days
2025 to Date: 2809.9
Current: 77.0°F
High&nbsp4:05pm: 75.6°F
Yesterday: 72.4°F
Record: 114.8°F
21-Jul-2019
Quality
Index6:
49

Good
Density:
1.20 kg/m3
Current UV Index Current Solar Energy9
1.4
Sunburn in
80 Minutes 		Highest:
12:56 PM
6.2
297 W/m2
86%
W/m2 ⇒ SI 		High Today:
1:32 PM
 846  W/m2
Record:
1433 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 39.8°F
Sunrise: 6:03 am
Sunset: 7:45 pm
Moonrise: 4:19 am
Moonset: 4:02 pm
Full Moon: 12-Apr-2025
New Moon: 19:32 UTC
27-Apr-2025
Updated at Midnight
Current ET: 0.21 in
7-Days Rain: 0.25 in
7-Days ET: 1.08 in
7-Day: 0.833 in water in deficit of what evaporated in last 7 days. 0.833 in
April: 1.82 in water in excess of what evaporated this month. 1.82 in
HIGHS: LOWS:
97.3°F
13-Aug-2021 		-2.7°F
7-Jan-2014
Daytime Records
  90.3°F°F
20-Jul-2020 		  3.9°F°F
07-Jan-2014
Nitetime Records
  87.3°F°F
20-Jul-2020 		  3.9°F°F
20-Feb-2015
ICN:0 | S3C2:0 | Ajax 3.xx
ISS:Ok | CON:4.7 | RCP:99%
1 Rain season: Jan 1st to Dec 31st.   5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).   6 Air Quality Index is provided by Minnesota Polution Control Agency and is updated hourly between the hours of 6AM and Midnight.   9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station’s recorded maximum or a percentage of computed theoretical solar maximum using the station’s location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.   10 Historical average only to day 24 of just the month of April for this station since 2009.   11 Historical average rain this season to day 24 of April for this station since 2009.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Sunny
Sunny

Hi 77°F 		NWS forecast: Sunny, with a high near 77. South wind around 8 mph.
WXSIM forecast: Fair. Very cold. Low 28°. Wind chill ranging from 22 to 27. Wind south-southwest around 6 mph, gusting to 30 mph.
 Local station forecast: Increasing clouds and warmer, precipitation possible within 12 to 24 hrs, windy. 		Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 52°F 		NWS forecast: Mostly clear, with a low around 52. South wind 1 to 7 mph.
WXSIM forecast: Partly to mostly sunny in the morning, becoming mostly cloudy in the afternoon. Cool. High 47°. UV index up to 6. Wind west-northwest around 4 mph, gusting to 15 mph.
 NWS Short Term Weather Forecast
Friday

Friday: Partly Sunny then Chance Rain Showers
Partly Sunny then Chance Rain Showers
Friday
Night
Friday Night: Rain Showers Likely
Rain Showers Likely
Saturday

Saturday: Rain Showers
Rain Showers
Saturday
Night
Saturday Night: Rain Showers then Mostly Clear
Rain Showers then Mostly Clear
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Clear
Clear
Monday

Monday: Sunny
Sunny
Hi 74°F Lo 63°F Hi 74°F Lo 46°F Hi 68°F Lo 45°F Hi 73°F
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