Click on the Rainfall and/or Stream Elevation tabs to see graphic representations like those above.
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The ground is already saturated. So any additional rainfall will result in rapid runoff So good luck to East Fork residents tonight and tomorrow.
Jeff Lindner, Harris County Meteorologist says “Additional rainfall amounts of 2-4 inches with isolated amounts up to 6 inches will be possible in this area with totals west of I-45 generally less than 2 inches.”
Posted by Bob Rehak on 9/18/2019 at 6pm
750 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/09/790-1.png?fit=540%2C400&ssl=1400540adminadmin2019-09-18 18:17:542019-09-18 18:18:02East Fork Rose 11 Feet Today; Almost Out of Banks at FM1485
The National Weather Service has issued an urban and small stream advisory for the northern Lake Houston Area. It extends across north Houston up to Conroe. Expect street flooding.
According to Harris County meteorologist Jeff Lindner, the center of Imelda is drifting over southwest Montgomery County as of late Wednesday morning. Lindner adds that “lull” in heavy rainfall over Harris County should last until early afternoon. Expect rain to pick up significantly between mid afternoon and evening.
Flash Flooding Possible
The National Weather Service cautions that heavy downpours with rainfall rates between 2-4 inches per hour are possible. That’s enough to cause street flooding.
The National Weather Service in League City has issued a
* Urban and Small Stream Flood Advisory for...
Southwestern San Jacinto County in southeastern Texas...
Southeastern Montgomery County in southeastern Texas...
West central Liberty County in southeastern Texas...
Northeastern Harris County in southeastern Texas...
* Until 1245 PM CDT.
* At 949 AM CDT, Doppler radar indicated heavy rain that will cause
urban and small stream flooding in the advisory area. 3 to 6
inches of rain have already fallen across portions of these areas
and additional rain is expected during the next several hours.
* Some locations that will experience flooding include...
Conroe, Humble, Jersey Village, Willis, Aldine, Northside /
Northline, Kingwood, The Woodlands, Greater Greenspoint, Spring,
Spring Branch North, northeastern Addicks Park Ten, Oak Ridge
North, Panorama Village, Shenandoah, Splendora, Patton Village,
Roman Forest, Woodbranch and Cut And Shoot.
Incredible Rainfall Rates South of Houston
Incredible rainfall rates of 3-4 inches per hour have resulted in a 24 hour storm total of 21.34 inches at Sargent with 7.56 inches falling in 1.5 hours and 10.72 inches in 3 hours this morning. This shows the potential of this air mass to produce excessive rainfall in a short period of time.
Heaviest Rainfall Expected Along US59
As the air mass heats late this morning, expect renewed development along/near the US 59 corridor.
Where exactly this band develops and how defined it becomes remains in question. But higher intensity rainfall rates will be possible in the afternoon and evening hours.
Rainfall Total Forecast
Expect an additional 2-4 inches with isolated amounts of 6 inches this afternoon through Thursday morning. Remember, 2 inches per hour can cause street flooding. Don’t drive through high water. Park your car on high ground.
To check the rainfall rate per hour, go to http://harriscountyfws.org, click on the a gage near you, then click the “for more information” link that pops up.
Posted by Bob Rehak on 9/18/19 at 10:45 am
750 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/09/image8-1.png?fit=725%2C408&ssl=1408725adminadmin2019-09-18 11:02:262019-09-18 11:08:16Center of Imelda Drifting Over SW Montgomery County as of Late Morning Wednesday
Here’s a river/lake report as of 7a.m. Wednesday, 9/18/19. During the early morning hours, TS Imelda was downgraded to a depression. The center of the storm moved north and is now over northern Harris County. Parts of the Lake Houston area received 4-5 inches of rain. Regardless, thanks to aggressive action by the City and luck in rainfall patterns, at this hour, no flood threat exists in our area from rivers or Lake Houston.
Little Rain So Far Upstream on West Fork
Rainfall around Lake Conroe overnight. Source: Harris County Flood Warning System
Luckily, very little rain fell upstream from us on the West Fork. In fact, the Lake Conroe area generally received less than a quarter inch of rain. Lake Conroe is releasing NO water at this hour. It’s level has not changed appreciably over night. It remains about 2.5 feet below normal.
West Fork and Lake Houston Still Below Normal Levels
Rainfall in Lake Houston Area. Source: Harris County Flood Warning SystemWest Fork status at Lake Houston Parkway. Source: Harris County Flood Warning System.
The West Lake Houston Parkway gage at the West Fork received a little more than four inches of rain in the last 24 hours. But the river is still within 6 feet of overflowing and the Lake itself is still about a foot below normal.
Source: USGS as reported by Coastal Water Authority.
Openning Gates Reduced Flood Threat
Source: Coastal Water Authority
Looking at the right of the graph above, you can see how yesterday’s decision to open the gates on Lake Houston lowered the level by an addition 1.3 feet. This helped offset the heavy rains that fell directly over the lake an in nearby tributaries.
The heaviest rain in the Lake Houston area appears to be 5.72 inches in Liberty County on the East Fork northeast of Lake Houston Park.
Overbank Flooding Limited to Southern Harris County So Far
The only flooding in Harris County from the heavy rains yesterday occurred in the extreme southern part of the county where the heaviest rains fell.
Flash Flood Watch Remains In Effect
Remain alert throughout today. A flash flood watch remains in effect for our area through tomorrow morning and will likely be extended.
Forecasters expect the heaviest rains with daytime heating. They predict that a band of rain will set up east of US59 this afternoon.
Conditions could change rapidly, especially now that the ground is fully saturated.
In the meantime, remain alert for street flooding and avoid travel if possible.
Posted by Bob Rehak on 9/18/2019 at 7 a.m.
750 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/09/Screen-Shot-2019-09-18-at-5.54.43-AM.png?fit=1870%2C1370&ssl=113701870adminadmin2019-09-18 06:45:182019-09-18 06:48:00Wednesday AM River, Lake Report: No Problems Yet
East Fork Rose 11 Feet Today; Almost Out of Banks at FM1485
The East Fork of the San Jacinto at FM1485 received almost 10 inches of rain today, including almost two inches in one hour late this afternoon.
Just upstream at 2090, the East Fork also received more than 10 inches in heavy bursts throughout the day.
As a consequence, the East Fork has risen 11 feet in the last 20 hours. It currently stands at about 57 feet. Flooding becomes likely at 60 feet.
Therefore, the river has three more feet to rise before coming out of its banks at FM1485.
Stay alert. For the most up to date information, consult:
Better yet, establish an account and sign up for automated alerts. You can customize your preferences or accept defaults for as many gages as you wish.
The ground is already saturated. So any additional rainfall will result in rapid runoff So good luck to East Fork residents tonight and tomorrow.
Jeff Lindner, Harris County Meteorologist says “Additional rainfall amounts of 2-4 inches with isolated amounts up to 6 inches will be possible in this area with totals west of I-45 generally less than 2 inches.”
Posted by Bob Rehak on 9/18/2019 at 6pm
750 Days since Hurricane Harvey
Center of Imelda Drifting Over SW Montgomery County as of Late Morning Wednesday
The National Weather Service has issued an urban and small stream advisory for the northern Lake Houston Area. It extends across north Houston up to Conroe. Expect street flooding.
According to Harris County meteorologist Jeff Lindner, the center of Imelda is drifting over southwest Montgomery County as of late Wednesday morning. Lindner adds that “lull” in heavy rainfall over Harris County should last until early afternoon. Expect rain to pick up significantly between mid afternoon and evening.
Flash Flooding Possible
The National Weather Service cautions that heavy downpours with rainfall rates between 2-4 inches per hour are possible. That’s enough to cause street flooding.
Incredible Rainfall Rates South of Houston
Incredible rainfall rates of 3-4 inches per hour have resulted in a 24 hour storm total of 21.34 inches at Sargent with 7.56 inches falling in 1.5 hours and 10.72 inches in 3 hours this morning. This shows the potential of this air mass to produce excessive rainfall in a short period of time.
Heaviest Rainfall Expected Along US59
As the air mass heats late this morning, expect renewed development along/near the US 59 corridor.
Where exactly this band develops and how defined it becomes remains in question. But higher intensity rainfall rates will be possible in the afternoon and evening hours.
Rainfall Total Forecast
Expect an additional 2-4 inches with isolated amounts of 6 inches this afternoon through Thursday morning. Remember, 2 inches per hour can cause street flooding. Don’t drive through high water. Park your car on high ground.
To check the rainfall rate per hour, go to http://harriscountyfws.org, click on the a gage near you, then click the “for more information” link that pops up.
Posted by Bob Rehak on 9/18/19 at 10:45 am
750 Days since Hurricane Harvey
Wednesday AM River, Lake Report: No Problems Yet
Here’s a river/lake report as of 7a.m. Wednesday, 9/18/19. During the early morning hours, TS Imelda was downgraded to a depression. The center of the storm moved north and is now over northern Harris County. Parts of the Lake Houston area received 4-5 inches of rain. Regardless, thanks to aggressive action by the City and luck in rainfall patterns, at this hour, no flood threat exists in our area from rivers or Lake Houston.
Little Rain So Far Upstream on West Fork
Luckily, very little rain fell upstream from us on the West Fork. In fact, the Lake Conroe area generally received less than a quarter inch of rain. Lake Conroe is releasing NO water at this hour. It’s level has not changed appreciably over night. It remains about 2.5 feet below normal.
West Fork and Lake Houston Still Below Normal Levels
The West Lake Houston Parkway gage at the West Fork received a little more than four inches of rain in the last 24 hours. But the river is still within 6 feet of overflowing and the Lake itself is still about a foot below normal.
Openning Gates Reduced Flood Threat
Looking at the right of the graph above, you can see how yesterday’s decision to open the gates on Lake Houston lowered the level by an addition 1.3 feet. This helped offset the heavy rains that fell directly over the lake an in nearby tributaries.
The heaviest rain in the Lake Houston area appears to be 5.72 inches in Liberty County on the East Fork northeast of Lake Houston Park.
Overbank Flooding Limited to Southern Harris County So Far
The only flooding in Harris County from the heavy rains yesterday occurred in the extreme southern part of the county where the heaviest rains fell.
Flash Flood Watch Remains In Effect
Remain alert throughout today. A flash flood watch remains in effect for our area through tomorrow morning and will likely be extended.
Forecasters expect the heaviest rains with daytime heating. They predict that a band of rain will set up east of US59 this afternoon.
Conditions could change rapidly, especially now that the ground is fully saturated.
In the meantime, remain alert for street flooding and avoid travel if possible.
Posted by Bob Rehak on 9/18/2019 at 7 a.m.
750 Days since Hurricane Harvey