Alert archive / Maryland / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 310, NWS Baltimore/Washington

July 17, 2025Anne Arundel County, Howard County, Prince George's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 17, 2025, 8:39 PM EDT for Anne Arundel County, Howard County, Prince George's County, Maryland. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 17, 2025, 8:39 PM EDT (00:39 UTC)
Expired
Jul 17, 2025, 9:00 PM EDT
In force
21 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Anne Arundel County, MD, Howard County, MD, Prince George's County, MD

The radar

The Sterling radar (KLWX), 69 km from the middle of the area, began a volume at 00:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.7 hours before the alert went out and 63 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2025-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2411 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2025-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2411 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1457 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.5
Supercell composite
8.2

Open this sounding in Storm Lab

The text

As transmitted.

878 
WUUS51 KLWX 180039
SVRLWX
MDC003-027-033-180115-
/O.NEW.KLWX.SV.W.0310.250718T0039Z-250718T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
839 PM EDT Thu Jul 17 2025

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Northwestern Anne Arundel County in central Maryland...
  South central Howard County in central Maryland...
  North central Prince Georges County in central Maryland...

* Until 915 PM EDT.

* At 839 PM EDT, a severe thunderstorm was located over Fort Meade,
  or near Severn, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damaging winds will cause some trees and large branches 
           to fall. This could injure those outdoors, as well as 
           damage homes and vehicles. Roadways may become blocked by 
           downed trees. Localized power outages are possible. 
           Unsecured light objects may become projectiles.

* Locations impacted include...
  Severn, Crofton, Beltsville, Glen Burnie, Severna Park, Odenton,
  Laurel, Pasadena, Fort Meade, Millersville, South Gate,
  Savage-guilford, Scaggsville, Jessup, Savage, Gambrills, Herald
  Harbor, Crownsville, Georgetown, and Montpelier.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning are occurring with this storm. 
Move indoors immediately. Lightning is one of nature's leading 
killers. Remember, if you can hear thunder, you are close enough to 
be struck by lightning.

&&

LAT...LON 3900 7656 3905 7690 3914 7689 3914 7655
TIME...MOT...LOC 0039Z 274DEG 25KT 3908 7677 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ADS
2 follow-up statements
845 
WWUS51 KLWX 180049
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
849 PM EDT Thu Jul 17 2025

MDC027-033-180059-
/O.CAN.KLWX.SV.W.0310.000000T0000Z-250718T0115Z/
Howard MD-Prince Georges MD-
849 PM EDT Thu Jul 17 2025

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL HOWARD AND NORTH
CENTRAL PRINCE GEORGES COUNTIES IS CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

&&

LAT...LON 3914 7655 3900 7656 3905 7679 3906 7680
      3906 7681 3909 7682 3912 7680 3913 7679
TIME...MOT...LOC 0049Z 273DEG 24KT 3908 7671 

$$

MDC003-180115-
/O.CON.KLWX.SV.W.0310.000000T0000Z-250718T0115Z/
Anne Arundel MD-
849 PM EDT Thu Jul 17 2025

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTHWESTERN ANNE ARUNDEL COUNTY...

At 849 PM EDT, a severe thunderstorm was located over Odenton, or
near Severn, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damaging winds will cause some trees and large branches to 
         fall. This could injure those outdoors, as well as damage 
         homes and vehicles. Roadways may become blocked by downed 
         trees. Localized power outages are possible. Unsecured 
         light objects may become projectiles.

Locations impacted include...
Severn, Crofton, Glen Burnie, Severna Park, Odenton, Pasadena, Fort
Meade, Millersville, South Gate, Jessup, Gambrills, Herald Harbor,
and Crownsville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3914 7655 3900 7656 3905 7679 3906 7680
      3906 7681 3909 7682 3912 7680 3913 7679
TIME...MOT...LOC 0049Z 273DEG 24KT 3908 7671 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

ADS
847 
WWUS51 KLWX 180100
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
900 PM EDT Thu Jul 17 2025

MDC003-180110-
/O.CAN.KLWX.SV.W.0310.000000T0000Z-250718T0115Z/
Anne Arundel MD-
900 PM EDT Thu Jul 17 2025

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ANNE ARUNDEL
COUNTY IS CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sterling Virginia.

&&

LAT...LON 3914 7655 3900 7656 3905 7679 3906 7680
      3906 7681 3909 7682 3912 7680 3913 7679
TIME...MOT...LOC 0058Z 274DEG 25KT 3907 7661 

$$

ADS

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 3:32 AM EDTFlood WatchLWXAllegany, Charles, Garrett20 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2025Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.