The center of Beta is currently near Bay City and moving ENE. For the next 24 hours, the National Hurricane Center (NHC) forecasts maximum winds at 30 mph.
If any readers in the Lake Houston Area felt left out by Beta, tonight could be your night. According to the NHC, Harris County Meteorologist Jeff Lindner and Space City Weather, models continue to show that a heavy band of rainfall will begin to develop over the next few hours across the northern portions of Harris County.
Current Radar Trends Show Storm Moving Toward Northeast Harris County
“Current radar trends show what may be the start of this banding feature from Downtown Houston to Jersey Village to Waller where a broken band of heavy to excessive rainfall is forming,” said Lindner at 4pm today.
He continued, “Models show this band continuing well into the evening and overnight hours across much of northern and northeastern Harris County into Liberty County. Training of heavy rainfall is likely with this banding along with flash flooding.”
(Update At 9:10 PM) The radar image above looked like this and heavy rain had started in Kingwood.
However, in the upper San Jacinto Watershed, the expected rainfall amounts will likely produce flooding only on Cypress and Little Cypress Creeks.
In other parts of Houston, the following streams could flood:
- Greens Bayou
- Halls Bayou
- Hunting Bayou
- White Oak Bayou tributaries
- Cedar Bayou
- Gum Gully
- Langham Creek
- Horsepen Creek
- South Mayde Creek
- Bear Creek
The largest threat at this point is street flooding. So move your cars out of the street tonight.
West Fork Still At Normal Level
At 4PM CDT Tuesday, the West Fork San Jacinto at US59 is still nearly seven feet from coming out of its banks.
Flood Warning System Shows Effects of Heavy Training
The high rainfall gradient across Harris County should the effects of heavy training by Beta’s feeder bands during the last 48 hours. Places under the bands received 12 to 14 inches of rains. Meanwhile, the Lake Houston Area received only around an inch so far.
Worst Likely Over for SW Harris County
Some heavy rainfall is still possible in already hard-hit southern and southwestern Harris County. However, where and potentially how much may fall in that area is uncertain.
Beta Continuing to Weaken
High-resolution visible satellite imagery, surface observations, and NOAA Doppler weather radar data from San Antonio and Houston, Texas, indicate that Beta has continued to weaken.
Cloud tops only extend up to 25,000- 30,000 ft, mainly near and northeast of the center. However, they are quite prodigious rain-producers. Rainfall totals of 13-14 inches having been measured across portions of the Houston metropolitan area thus far.
The Future of Beta
Since Beta should remain inland throughout the forecast period, the cyclone is not expected to regain tropical storm status. Beta should degenerate into a remnant low within 36 hours and dissipate over Mississippi or Alabama in 96 hours, if not sooner.
At 4 p.m. Tuesday, September 22, 2020, the National Hurricane Center (NHC) issued its last update on Beta.
Said Space City Weather, “The good news is that this mess will begin to clear our of here by Wednesday morning, if not sooner for some areas. The bad news is that we’ve got to get through later today and tonight.”
Posted by Bob Rehak on 9/22/2020 based on data from HCFCD, NHC and Space City Weather
1120 Days after Hurricane Harvey and 369 since Imelda