April 2016 Recap: Regional Flood/Severe Weather

Mon Apr 18, 2016 4:55 am

738
WFUS54 KHGX 180952
TORHGX
TXC201-181015-
/O.NEW.KHGX.TO.W.0005.160418T0952Z-160418T1015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
452 AM CDT MON APR 18 2016

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
EAST CENTRAL HARRIS COUNTY IN SOUTHEASTERN TEXAS...

* UNTIL 515 AM CDT

* AT 451 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER EAST LITTLE YORK / HOMESTEAD...OR NEAR NORTHSIDE /
NORTHLINE...MOVING EAST AT 20 MPH.

HAZARD...TORNADO.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.
DAMAGE TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR. TREE
DAMAGE IS LIKELY.

* LOCATIONS IMPACTED INCLUDE...
HUMBLE...NORTHSIDE / NORTHLINE...ALDINE...EASTEX / JENSEN AREA...
SHELDON...EAST LITTLE YORK / HOMESTEAD...HOUSTON GARDENS...EAST
HOUSTON...ATASCOCITA...LAKE HOUSTON DAM...LAKE HOUSTON...SETTEGAST...
INDEPENDENCE HEIGHTS AND SOUTHEASTERN BUSH INTERCONTINENTAL
AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER
AND PROTECT YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW!

LAT...LON 2982 9538 2989 9540 3001 9516 2984 9511
TIME...MOT...LOC 0951Z 255DEG 18KT 2988 9533

TORNADO...RADAR INDICATED
HAIL...0.00IN

39

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Mon Apr 18, 2016 5:03 am

Many school districts are closed including Katy ISD and HISD

Mon Apr 18, 2016 5:06 am

Folks, this is the worst flooding I have seen in NW Harris County since the isolated 2007 April Flood. We have rivers now flowing in our streets in the Copperfield/Copper Grove areas of Huffmiester/HWY 6 N. No doubt the Upper White Oak Bayou is flooding significantly. Do not head into Downtown if possible today. Follow the Updates from Jeff Lindner/Harris County Flood Control District, The National Weather Service Offices. I have surpassed 20 inches of rainfall since 6:00 PM Yesterday here at the house!

Mon Apr 18, 2016 5:14 am

04182016 mcd0411.gif

MESOSCALE DISCUSSION 0411
NWS STORM PREDICTION CENTER NORMAN OK
0510 AM CDT MON APR 18 2016

AREAS AFFECTED...PORTIONS OF THE UPPER TX COAST/HOUSTON METRO

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 181010Z - 181145Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...A FEW STRONG WIND GUSTS WILL BE POSSIBLE ALONG THE UPPER
TX COAST/HOUSTON METRO AREA THE NEXT COUPLE OF HOURS. WHILE THE
TORNADO THREAT WILL REMAIN LOW...IT IS NON-ZERO. ANY SEVERE WEATHER
IS EXPECTED TO BE LIMITED IN SPACE AN TIME AND A WATCH IS NOT
ANTICIPATED AT THIS TIME.

DISCUSSION...THE BAND OF FLOODING THUNDERSTORMS WILL CONTINUE TO
PROPAGATE SOUTHEAST THIS MORNING. ENOUGH OF A COLD POOL HAD
DEVELOPED THAT FORWARD SPEED OF SOUTHEAST STORM MOTION HAS INCREASED
SOME OVER THE LAST HOUR OR SO...WITH STRONGER REAR INFLOW EVIDENT ON
RADAR. AS THE BAND SHIFTS SOUTHEAST...BACKED LOW LEVEL FLOW AND
CURVED HODOGRAPHS PER HGX WSR-88D VWP COULD LEAD TO SOME
MESOVORTEX-LIKE FEATURES ALONG THE LEADING EDGE OF THE LINE OF
STORMS. ADDITIONALLY...PW VALUES NEAR 1.75 INCHES COULD LEAD TO
PRECIP LOADING...RESULTING IN A FEW STRONG WIND GUSTS. WHILE TORNADO
THREAT APPEARS LOW...A BRIEF TORNADO CAN NOT BE RULED OUT. THESE
MESOVORTEX FEATURES WILL REMAIN TRANSIENT AND SHORT-LIVED...WITH THE
MAIN THREAT CONTINUING TO BE FLOODING RAINFALL. AS SUCH...A WATCH IS
NOT EXPECTED AT THIS TIME.

..LEITMAN/THOMPSON.. 04/18/2016

Mon Apr 18, 2016 5:16 am

got some pea size hail over here on katy freeway and dairy ashford. Strong winds too (~40-50mph gusts)

Mon Apr 18, 2016 5:17 am

my office is open in downtown -heading out to see if metro park and rides are running....

Mon Apr 18, 2016 5:18 am

METRO Houston Alerts ‏@METROHouAlerts https://twitter.com/METROHouAlerts

6, 27, 29, 30, 40, 44, 51, 52, 56, 59, 80, 83 & 85 will have significant delays due to weather.

Severe weather has resulted in the closure of 290 HOV. Impacted bus routes 214, 216, 217, 219.

Mon Apr 18, 2016 5:27 am

From Jeff:

Tremendous inflow going into Addicks. HWY 6 overtopped by Bear Creek flowing into Addicks

Mon Apr 18, 2016 5:27 am

Anyone have an idea if this will have an immediate impact on White Oak Bayou downtown? I work at university of Houston downtown and wondering about impacts. I am hoping the university will remain closed, but who knows...

Mon Apr 18, 2016 5:28 am

Just getting up to see the historic flooding that is ongoing across portions of SE TX. Flash Flood Emergency continues for NE Colorado, Waller, SE Grimes, SW Montgomery, NW Harris, and Austin Counties. This is an extremely dangerous and life threatening situation! Stay off roads in these areas. Additional periods of heavy flooding rains are likely today and tomorrow. From this morning's Houston-Galveston AFD:

SEVERE...HISTORIC FLOOD EVENT ONGOING. SEVERAL FLASH FLOOD
WARNINGS AND FLASH FLOOD EMERGENCIES IN EFFECT FROM SLOW MOVING
BAND OF THUNDERSTORMS. MULTIPLE HIGH WATER RESCUES REPORTED AND
STRUCTURES BEING FLOODED. UNFORTUNATELY BAND OF THUNDERSTORMS TO
IMPACT AREAS ALREADY HAVING RECEIVED HEAVY RAIN FOR POTENTIALLY SEVERAL
MORE HOURS.
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
439 AM CDT MON APR 18 2016

...FLASH FLOOD EMERGENCY...

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
NORTHEASTERN COLORADO COUNTY IN SOUTHEASTERN TEXAS...
WALLER COUNTY IN SOUTHEASTERN TEXAS...
SOUTHEASTERN GRIMES COUNTY IN SOUTHEASTERN TEXAS...
SOUTHWESTERN MONTGOMERY COUNTY IN SOUTHEASTERN TEXAS...
NORTHWESTERN HARRIS COUNTY IN SOUTHEASTERN TEXAS...
AUSTIN COUNTY IN SOUTHEASTERN TEXAS...

* UNTIL 900 AM CDT

* AT 430 AM CDT...DOPPLER RADAR AND RAIN GAUGES INDICATE THAT BETWEEN
8 AND 16 INCHES OF RAIN HAVE FALLEN ACROSS THE FLASH FLOOD EMERGENCY AREA.
FLASH FLOODING IS OCCURRING. ADDITIONAL HEAVY RAINFALL IS EXPECTED.

THIS IS A FLASH FLOOD EMERGENCY. THIS IS A PARTICULARLY DANGEROUS SITUATION.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
KATY...TOMBALL...JERSEY VILLAGE...HEMPSTEAD...PRAIRIE VIEW...BROOKSHIRE...
BELLVILLE...PINEHURST...ADDICKS PARK TEN...THE WOODLANDS...NORTHERN
ELDRIDGE / WEST OAKS...SHELBY...HOCKLEY...WALLER...MAGNOLIA...PINE
ISLAND...SAN FELIPE...STAGECOACH...PATTISON AND INDUSTRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS AND LIFE-THREATENING SITUATION. STAY OFF
ROADS IN THIS AREA.

TURN AROUND...DON`T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

Mon Apr 18, 2016 5:31 am

houstonia wrote:Anyone have an idea if this will have an immediate impact on White Oak Bayou downtown? I work at university of Houston downtown and wondering about impacts. I am hoping the university will remain closed, but who knows...

Flood Warning for White Oak Bayou coming shortly. Jeff is discussing with HGX now on NWS chat.

Mon Apr 18, 2016 5:33 am

love LSU Earth Scan Lab's stuff http://www.esl.lsu.edu/

loop http://www.esl.lsu.edu/imagery/atmosphe ... n-gulf/WV/

Mon Apr 18, 2016 5:35 am

Flood Warning issued for Halls Bayou until further notice.

Mon Apr 18, 2016 5:36 am

From Jeff:

Have at least 40 different subdivisions reporting flooding at this time.

Mon Apr 18, 2016 5:37 am

From Jeff:

Life threatening flooding on Greens Bayou at Greenspoint. Nearing TS Allison levels on middle Greens.

Mon Apr 18, 2016 5:40 am

great tool from Iowa Mesonet for getting instant weather info

https://weather.im/iembot/

select the weather office you want info from in the drop down under "Available Rooms". You can add an audible alert so you don't miss them if you step away from your screen. you can select more than one WFO & they will open in a new tab

Mon Apr 18, 2016 5:41 am

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
539 AM CDT MON APR 18 2016

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
SOUTH CENTRAL LIBERTY COUNTY IN SOUTHEASTERN TEXAS...

* UNTIL 615 AM CDT

* AT 539 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR DAYTON...MOVING NORTHEAST AT 35 MPH.

HAZARD...TORNADO.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.
DAMAGE TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR. TREE
DAMAGE IS LIKELY.

* LOCATIONS IMPACTED INCLUDE...
LIBERTY...DAYTON...AMES...HARDIN...KENEFICK AND DAYTON LAKES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER
AND PROTECT YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW!

THIS CLUSTER OF THUNDERSTORMS IS CAPABLE OF PRODUCING TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A BUILDING.

&&

LAT...LON 2993 9496 3001 9500 3026 9483 3005 9465
TIME...MOT...LOC 1039Z 232DEG 30KT 3000 9494

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$
39

Mon Apr 18, 2016 5:41 am

From Jeff:

THIS IS A LIFE THREATENING SITUATION!

Flash Flood Emergency until 900am Austin, Waller, N Harris

Rainfall 10-15 inches across NW ½ of Harris County leading to devastating flooding. Many homes are flooding…likely thousands. Core of intense rainfall now moving into central Harris County with hit the urban watersheds very hard next 2-3 hours.

Numerous calls for high water rescues through 911. Only call 911 if it is a life threatening emergency.

Some water levels over 500-yr elevations (Horsepen, upper Spring, and Langham Creek)

Major flooding

Cypress
Little Cypress
South Mayde
Bear
Willow
Spring
White Oak Bayou (Jersey Village)
Greens Bayou (significant flooding of Greenspoint is likely)

12-hrs

04182016 Jeff 1 unnamed.jpg

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Mon Apr 18, 2016 5:46 am

From Jeff:

Significant flooding expected all White Oak Bayou. Many subdivisions will be affected

Mon Apr 18, 2016 5:58 am

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
557 AM CDT MON APR 18 2016

...FLASH FLOOD EMERGENCY EXPANDED TO THE EAST...

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEASTERN TEXAS...
NORTHWESTERN HARRIS COUNTY IN SOUTHEASTERN TEXAS...

* UNTIL 900 AM CDT

* AT 552 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE HEAVY RAIN ACROSS THE WARNED
AREA. FLASH FLOODING IS OCCURRING. BUSH INTERCONTINENTAL AIRPORT IS APPROACHING
9 INCHES OF RAINFALL. RAINFALL RATES ARE RANGING BETWEEN 2 TO 4 INCHES AN HOUR.

THIS IS A FLASH FLOOD EMERGENCY. THIS IS A PARTICULARLY DANGEROUS SITUATION.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
HUMBLE...KATY...JERSEY VILLAGE...SPRING...THE WOODLANDS...ELDRIDGE /
WEST OAKS...GREATER GREENSPOINT...SOUTHEASTERN ADDICKS PARK TEN...
SPRING BRANCH NORTH...SPRING BRANCH WEST...ALDINE...KINGWOOD...OAK
RIDGE NORTH...SHENANDOAH...WOODLOCH...GREATER INWOOD...WESTBRANCH...BUSH
INTERCONTINENTAL AIRPORT...PORTER HEIGHTS AND SPLASHTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS AND LIFE-THREATENING SITUATION. STAY OFF ROADS IN
THE EMERGENCY AREA.

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

April 2016 Recap: Regional Flood/Severe Weather

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