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Flash Flood Watch near Allentown, PA



  Flash flood watch near Allentown, PA 69 News

TODAY: Mostly cloudy with some showers and t-storms ; not so warm. High: 71

TONIGHT: Cloudy with a residual shower, especially early. Low: 56

MONDAY: cloudy in the morning, then clear sky in the afternoon. High: 74 Low: 64

  • FLASH FLOOD WATCH IN EFFECT FOR BERKS, LEHIGH, NORTHAMPTON, CHESTER, MONTGOMERY, DELAWARE, PHILADELPHIA, WARREN, MERCER, BURLINGTON, CAMDEN AND GLOUCESTER GRAPHICS UNTIL 10 AM ***
  • FLASH HIGH ALARM WARNING now in effect for MERCER COUNTY UNTIL 10:15 AM
  • FLASH FLOOD ALARM IN EFFECT FOR HUNTERDON AND BUCKS COUNTIES UNTIL 10:30 AM

It was certainly a summer-like day to launch this year's unofficial Memorial Day weekend. The highs rose yesterday in the upper 80s and the lower 90s, along with very high humidity. The warm and humid air caused a few pop-up showers and thunderstorms in the afternoon, but was quite isolated in nature. However, things changed dramatically overnight in our weather, thanks to a backdoor cold front coming from New England.

The drastic change in today's weather is possible thanks to a backdoor cold front that runs through the area from the northeast. This frontal passage, combined with a disruption from above that invades from the west, causes chill and severe thunderstorms throughout the region this morning. Some of these storms will have frequent lightning and heavy rain. The storms will move slowly and could "train" over the same area, which in some places would mean heavy rainfall for a long time. For this reason, the National Weather Service has hosted the Lehigh Valley at 10:00 am under a Flash Flood Watch to the south and east. There is a chance that some areas will receive 2-3 "of rain in just a few hours, as the soil is still saturated and streams and rivers are well above normal during the last few weeks of heavy rain, it will only take a few days a few inches of rain in a short time, so that streams and streams can flood their banks Flooding of low-lying and poor drainage areas is also likely in the storm-hit areas, and motorists traveling early today should be English: www.dlr.com German: www.socialistgroup.eu/gpes/sessiond…01&place=STR After the change in the road conditions and the flooding of the flooded roads, most of the area will not see so much rain, but only in some places, depending on where the Thunderstorms have formed the backdoor cold front brings cooler, maritime air from the northeast, the temperatures remain stable or fall even to Nachmi day, most of us will see highs in the low 70s this morning, but temperatures could fall in the upper 6 o'clock in the afternoon when we would normally experience our high temperatures. The threat of showers and storms will continue throughout the day today, with scattered thunderstorms, which include heavy rains and frequent lightning. Heavy thunderstorms are not expected.

Memorial Day Monday should be a big improvement from today, especially if you have planned outdoor activities. In the morning we start cool and cloudy with a stray shower at sunrise. To the delight of many, during the day, we expect Heaven to begin to lighten as the cool sea air recedes to the east, invading warmer air from the west. This will be reflected in the wind flow as it changes from the eastern onshore direction to a southwesterly direction. An anticyclone will also try to build in slowly from the west. This should lead to slightly drier air, which cuts through the clouds in the afternoon. We could see decent sunshine later in the afternoon and help keep high temperatures down to the mid-70s, which is the end of May season. A faint cold front approaching from the northwest in late afternoon could trigger a stray shower over the Poconos, but for most of us it looks pretty dry for a good part of Memorial Day vacations.

On Tuesday and Wednesday, our Northwest will create a major high-pressure area that will lead to sunnier skies, lower humidity and warmer weather. The high season on Tuesday could even go back to the mid and high 80s, though we expect dew points to fall back into the 50s thanks to a dry north breeze. Although the high comes close to yesterday's, it will feel less humid due to the lower humidity. On Wednesday, centered at high pressure on our northeast, our wind direction will change to the northeast. This will lead to slightly lower temperatures, but still in the low 80s. We will see some tropical developments in the Gulf of Mexico early next week this weekend, while Sub-Tropical Storm Alberto continues north towards the Gulf Coast. The remnants of Alberto could attempt to move north to the south-central states, and eventually to the Midwest, moving with a cold front through the Midwest. These features could try to work in our area in the second half of next week, which will lead to a return to unclear conditions, but there is still some uncertainty about the exact lane and development of Alberto, so stay tuned.

Have a wonderful rest of the holiday weekend, and we remember all those who gave their lives to serve our country!


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