MDZ507
Current watches, warnings, and advisories for Northwest Harford (MDZ507) MD
Frost Advisory issued October 23 at 8:43PM EDT until October 24 at 9:00AM EDT by NWS Baltimore MD/Washington DC
* WHAT...
Temperatures as low as 33 will result in frost formation.* WHERE...
Carroll, Frederick, Cecil, Northern Baltimore, and HarfordCounties in Maryland.* WHEN...
From 1 AM to 9 AM EDT Saturday.* IMPACTS...
Frost could harm sensitive outdoor vegetation. Sensitiveoutdoor plants may be killed if left uncovered.
Frost Advisory
****************

Record high temperature 100.9°F Record low temperature -3.1°F Record high gust 56.0 mph Record high average 28.3 mph Record daily rain 7.66 in. Record low windchill -19.3°F Record high barometer 30.900 in. Record low barometer 26.001 in.
Daily high pressure 30.378 in. Daily low pressure 30.101 in. Daily low windchill 46.2°F Daily high heat index 62.7°F Daily high gust speed 15.0 mph ENE Daily high average speed 9.6 mph ENE
Mark Hofmann's Bel Air, MD - USA (Weather Station)
LAST READING AT TIME: 9:01 PM DATE: October 23 2026, time of next update: 9:02 pm
Current Weathermostly clear/Night Current Temperature 48.7°F (9.3°C), Apparent temp 47.9°F
Maximum Temperature (since midnight)62.7°F at: 3:38 PM Minimum Temperature (since midnight)46.2°F at: 7:58 AM
Average windspeed (ten minute)0.0 mph Wind Direction (ten minute)E (90°)
Windchill Temperature 48.7°F Maximum Gust (last hour)0.0 mph at: 9:00 PM
Maximum Gust (since midnight)15.0 mph at: 10:29 AM Maximum 1 minute average (since midnight)9.6 mph at: 1:05 PM
Rainfall (last hour)0.000 in. (0.0 mm) Rainfall (since midnight)0.000 in. (0.0 mm) ---
Rainfall This month 3.58 in. (90.9 mm) Rainfall To date this year 30.560 in. (776.2 mm)
Maximum rain per minute (last hour)0.000 in/min Maximum rain per hour (last 6 hours)0.000 in/hour
Yesterdays rainfall 0.000 in DewPoint 42.8°F (Wet Bulb :46.0°F )
Humidity 80 %, Humidex 48.1°F Barometer corrected to msl30.378 in. (1028.7 hPa)
Pressure change +0.01 in. (last hour) Trend (last hour)STEADY
Pressure change (last 12 hours)+0.10 in Pressure change (last 6 hours)+0.09 in
Current Indoor Temp. 79.0°F
Current Indoor Hum. 39%

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Weather report/warning/Metars

Expires:201412031800;;271410
FPUS51 KLWX 031430
ZFPLWX
ZONE FORECAST PRODUCT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
930 AM EST WED DEC 3 2014

MDZ007-031800-
HARFORD-
930 AM EST WED DEC 3 2014
.REST OF TODAY...AREAS OF FOG LATE THIS MORNING. CLOUDY WITH A
20 PERCENT CHANCE OF SHOWERS. HIGHS IN THE LOWER 50S. SOUTHWEST
WINDS 10 TO 15 MPH. 
.TONIGHT...PARTLY CLOUDY IN THE EVENING...THEN CLEARING. LOWS IN THE
LOWER 30S. WEST WINDS 10 TO 15 MPH. 
.THURSDAY...MOSTLY SUNNY. HIGHS IN THE LOWER 40S. NORTHWEST WINDS
10 TO 15 MPH. 
.THURSDAY NIGHT...CLOUDY. LOWS IN THE LOWER 30S. EAST WINDS AROUND
5 MPH. 
.FRIDAY...CLOUDY. HIGHS IN THE MID 40S. EAST WINDS AROUND 5 MPH. 
.FRIDAY NIGHT...CLOUDY WITH A 40 PERCENT CHANCE OF RAIN. LOWS IN THE
UPPER 30S. 
.SATURDAY...RAIN. HIGHS IN THE UPPER 40S. CHANCE OF RAIN 80 PERCENT.
.SATURDAY NIGHT...RAIN LIKELY. LOWS IN THE UPPER 30S. CHANCE OF RAIN
70 PERCENT. 
.SUNDAY...PARTLY SUNNY WITH A 30 PERCENT CHANCE OF RAIN. HIGHS IN
THE MID 40S. 
.SUNDAY NIGHT...MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF RAIN. LOWS
IN THE UPPER 30S. 
.MONDAY...MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF RAIN. HIGHS IN
THE UPPER 40S. 
.MONDAY NIGHT...MOSTLY CLOUDY. LOWS IN THE UPPER 30S. 
.TUESDAY...PARTLY SUNNY. HIGHS IN THE MID 40S. 
$$

BALTIMORE-WASHINGTON INTERNATIONAL , MD, United States (KBWI) 39-10N 076-41W 59M
Oct 23, 2026 - 08:54 PM EDT / 2026.10.24 0054 UTC
Wind: Calm:0
Visibility: 10 mile(s):0
Sky conditions: mostly clear
Temperature: 46.9 F (8.3 C)
Dew Point: 41.0 F (5.0 C)
Relative Humidity: 79%
Pressure (altimeter): 30.42 in. Hg (1030 hPa)
ob: KBWI 240054Z 00000KT 10SM FEW250 08/05 A3042 RMK AO2 SLP302 T00830050
cycle: 1