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Areas of Severe Thunderstorms and Excessive Rainfall Today in the Central U.S.

A storm system will track from the southern Plains to the Upper Midwest today. Severe thunderstorms are expected from east Texas into far southeast Iowa and Illinois. A strong tornado and damaging wind potential will exist from central Arkansas into central Missouri. Heavy to excessive rainfall from eastern Texas into the Midwest states may bring new or renewed areas of flooding. Read More >

Philadelphia/Mt Holly

Weather Forecast Office

February 24-25: Mixed Precipitation Event

Weather.gov > Philadelphia/Mt Holly > February 24-25: Mixed Precipitation Event

Overview

An area of low pressure tracked through western Pennsylvania on the night of February 24 into the morning of February 25. A weak secondary low also began to develop off the New Jersey coast as this happened. This complex frontal system brought about a 12 hour period of precipitation to the region. With the main low tracking west of the region, warmer air rushed in aloft, limiting the potential for snow to fall. However, a strong Canadian high pressure to the north, combined with the developing secondary low, caused colder air to be trapped near the surface. This caused precipitation to fall as a wintry mix across the region, including as several hours of sleet and freezing rain. In some cases, the glaze ice accretion was enough to cause tree and power line damage, especially over portions of southeast Pennsylvania and central New Jersey. The system pulled away from the region by the afternoon of the 25th with warmer and drier weather following behind it.

 Image
Glaze ice clings to a tree in Mertztown, Berks County, PA on the morning of February 25. Click to enlarge. Photo credit: Linda Charnick

Meteorological Environment/Setup

Synoptic Overview at 00z 25 Feb 2022 (courtesy of SPC)

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Figure 1: 250-mb analysis Figure 2: 300-mb analysis Figure 3: 500-mb analysis
 
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Figure 4: 700-mb analysis Figure 5: 850-mb analysis Figure 6: 925-mb analysis

Synoptic Overview at 12z 25 Feb 2022 (courtesy of SPC)

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Figure 7: 250-mb analysis Figure 8: 300-mb analysis Figure 9: 500-mb analysis
 
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Figure 10: 700-mb analysis Figure 11: 850-mb analysis Figure 12: 925-mb analysis
 

Surface Maps (courtesy of WPC)

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Figure 13: 03z surface map Figure 14: 06z surface map Figure 15: 09z surface map
 
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Figure 16: 12z surface map Figure 17: 15z surface map Figure 18: 18z surface map

Observed Soundings
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Figure 19: 00z Long Island, NY sounding Figure 20: 00z Sterling, VA sounding Figure 21: 00z Albany, NY sounding
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Figure 22: 12z Long Island, NY sounding Figure 23: 12z Sterling, VA sounding Figure 24: 12z Wallops Island, VA sounding
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