Alert archive / Texas / Flash Flood Warnings in 2019

Flash Flood Warning 51, NWS Houston/Galveston, TX

September 19, 2019Chambers County, Harris County, Liberty County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Sep 19, 2019, 8:26 AM CDT for Chambers County, Harris County, Liberty County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 19, 2019, 8:26 AM CDT (13:26 UTC)
Expired
Sep 19, 2019, 11:30 AM CDT
In force
3 hr
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Flood severity
None

Counties Chambers County, TX, Harris County, TX, Liberty County, TX

The radar

The Houston radar (KHGX), 50 km from the middle of the area, began a volume at 13:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.4 hours before the alert went out and 171 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 2019-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 168 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2019-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
168 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1073 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 19, 7:30 AM CDT, 56 minutes earlier.

Area forecast discussion, Sep 19, 7:30 AM CDT, 56 minutes before
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In the hours before

Local storm report, Sep 19, 3:56 AM CDT, 4 hours 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
356 AM CDT THU SEP 19 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0353 AM     FLASH FLOOD      LIBERTY                 30.07N 94.78W
09/19/2019                   LIBERTY            TX   LAW ENFORCEMENT

            MULTIPLE ROAD ACROSS LIBERTY COUNTY ARE
            IMPASSABLE. THESE INCLUDE, BUT NOT LIMITED
            TO FM 1010, FM 1008 AT COUNTY ROAD 2313, FM
            1008 AT COUNTY ROAD 2285, AND COUNTY ROAD
            379.

&&

JPF
Special weather statement, Sep 19, 6:04 AM CDT, 2 hours 22 minutes before
Special Weather Statement
National Weather Service Houston/Galveston TX
604 AM CDT Thu Sep 19 2019

TXZ199-191145-
Montgomery TX-
604 AM CDT Thu Sep 19 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MONTGOMERY COUNTY
UNTIL 645 AM CDT...

At 604 AM CDT, Doppler radar was tracking a strong thunderstorm over
Cut And Shoot, or near Conroe, moving southeast at 15 mph.

Winds in excess of 45 mph will be possible with this storm.

Locations impacted include...
Conroe, The Woodlands, Kingwood, Oak Ridge North, Panorama Village,
Shenandoah, Splendora, Patton Village, Roman Forest, Woodbranch, Cut
And Shoot, Woodloch, The Woodlands Pavillion, Chateau Woods, Lake
Conroe Dam, Porter Heights, New Caney and Porter.

LAT...LON 3021 9557 3040 9559 3030 9516 3017 9511
      3004 9526
TIME...MOT...LOC 1104Z 321DEG 14KT 3031 9538
Local storm report, Sep 19, 7:27 AM CDT, 59 minutes before
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Local storm report, Sep 19, 7:34 AM CDT, 52 minutes before
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Local storm report, Sep 19, 8:10 AM CDT, 16 minutes before
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Local storm report, Sep 19, 8:26 AM CDT, 0 minutes before
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The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 18, 7:15 PM CDTFlash Flood WarningHGXChambers, Galveston, Harris60 min
Sep 18, 7:28 PM CDTAreal Flood AdvisoryHGXChambers, Harris, Liberty2 hr
Sep 18, 7:32 PM CDTAreal Flood WarningHGXGalveston3 hr
Sep 18, 7:44 PM CDTFlash Flood WarningHGXChambers, Liberty2 hr
Sep 18, 8:14 PM CDTAreal Flood WarningHGXChambers, Fort Bend, Harris61 min
Sep 18, 9:46 PM CDTFlash Flood WarningHGXChambers, Liberty59 min
Sep 18, 10:41 PM CDTFlash Flood WarningHGXChambers, Liberty64 min
Sep 18, 11:38 PM CDTFlash Flood Warning EmergencyHGXChambers, Liberty8 hr
Sep 19, 12:16 AM CDTAreal Flood AdvisoryHGXHarris, Liberty, Montgomery59 min
Sep 19, 1:24 AM CDTSmall Craft AdvisoryHGX9 hr
Sep 19, 1:28 AM CDTAreal Flood AdvisoryHGXChambers, Harris, Liberty, Montgomery2 hr
Sep 19, 2:20 AM CDTFlash Flood WarningHGXHarris, Liberty, Montgomery115 min
Sep 19, 2:56 AM CDTRiver Flood WarningHGXHarris, Montgomery63 hr
Sep 19, 4:15 AM CDTFlash Flood WarningHGXChambers, Harris, Liberty, Montgomery, San Jacinto3 hr
Sep 19, 4:59 AM CDTFlash Flood Warning EmergencyHGXLiberty2 hr
Sep 19, 5:32 AM CDTFlash Flood WarningHGXMontgomery118 min
Sep 19, 5:44 AM CDTRiver Flood WarningHGXLiberty4 days
Sep 19, 6:04 AM CDTSpecial Weather StatementHGXMontgomery41 min
Sep 19, 6:41 AM CDTTornado WarningHGXChambers21 min
Sep 19, 7:00 AM CDTFlash Flood Warning EmergencyHGXChambers, Liberty, Montgomery, San Jacinto7 hr
Sep 19, 7:18 AM CDTFlash Flood WarningHGXHarris, Liberty, Montgomery4 hr
Sep 19, 7:37 AM CDTSevere Thunderstorm WarningHGXHarris, Liberty, Montgomery38 min
Sep 19, 8:10 AM CDTRiver Flood WarningHGXHarris, Montgomery21 hr
Sep 19, 8:12 AM CDTRiver Flood WarningHGXHarris, Liberty, Montgomery, San Jacinto33 hr
Sep 19, 8:27 AM CDTRiver Flood WarningHGXChambers, Harris, Liberty3 days
Sep 19, 8:33 AM CDTSpecial Marine WarningHGX87 min
Sep 19, 8:50 AM CDTFlash Flood Warning EmergencyHGXChambers, Harris, Liberty, Montgomery5 hr
Sep 19, 9:12 AM CDTFlash Flood WarningHGXHarris, Montgomery3 hr
Sep 19, 9:25 AM CDTSpecial Weather StatementHGXChambers, Harris65 min
Sep 19, 10:02 AM CDTFlash Flood Warning EmergencyHGXHarris118 min
Sep 19, 10:12 AM CDTRiver Flood WarningHGXHarris, Montgomery44 hr
Sep 19, 10:20 AM CDTAreal Flood AdvisoryHGXGalveston115 min
Sep 19, 10:20 AM CDTSmall Craft AdvisoryHGX9 hr
Sep 19, 10:28 AM CDTRiver Flood WarningHGXHarris18 hr
Sep 19, 10:30 AM CDTFlash Flood WarningHGXHarris3 hr
Sep 19, 10:41 AM CDTRiver Flood WarningHGXHarris18 hr
Sep 19, 10:41 AM CDTRiver Flood WarningHGXHarris36 hr
Sep 19, 10:41 AM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 10:46 AM CDTSpecial Marine WarningHGX119 min
Sep 19, 10:47 AM CDTFlash Flood WarningHGXChambers, Galveston31 min
Sep 19, 11:01 AM CDTRiver Flood WarningHGXHarris18 hr
Sep 19, 11:16 AM CDTFlash Flood WarningHGXBrazoria, Chambers, Galveston3 hr
Sep 19, 11:17 AM CDTRiver Flood WarningHGXHarris27 hr
Sep 19, 11:17 AM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 11:38 AM CDTFlash Flood WarningHGXChambers, Harris, Liberty112 min
Sep 19, 11:45 AM CDTRiver Flood WarningHGXHarris17 hr
Sep 19, 11:45 AM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 11:45 AM CDTRiver Flood WarningHGXHarris17 hr
Sep 19, 12:00 PM CDTRiver Flood WarningHGXHarris, Montgomery18 hr
Sep 19, 12:03 PM CDTFlash Flood WarningHGXAustin, Brazoria, Colorado, Fort Bend, Harris, Waller and 1 more3 hr
Sep 19, 12:06 PM CDTRiver Flood WarningHGXHarris4 days
Sep 19, 12:08 PM CDTFlash Flood Warning EmergencyHGXHarris3 hr
Sep 19, 12:13 PM CDTRiver Flood WarningHGXHarris16 hr
Sep 19, 12:13 PM CDTRiver Flood WarningHGXHarris19 hr
Sep 19, 12:23 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 12:23 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 12:31 PM CDTRiver Flood WarningHGXHarris16 hr
Sep 19, 12:31 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 12:31 PM CDTRiver Flood WarningHGXHarris16 hr
Sep 19, 12:43 PM CDTSpecial Marine WarningHGX2 hr
Sep 19, 12:50 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 12:56 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 1:25 PM CDTFlash Flood WarningHGXBrazoria, Chambers, Fort Bend, Galveston, Harris, Liberty3 hr
Sep 19, 1:27 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 1:27 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 1:27 PM CDTRiver Flood WarningHGXFort Bend, Harris21 days
Sep 19, 1:27 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 1:27 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 2:00 PM CDTFlash Flood Warning EmergencyHGXChambers, Harris, Liberty, Montgomery, San Jacinto3 hr
Sep 19, 2:16 PM CDTFlash Flood WarningHGXBrazoria, Chambers, Galveston119 min
Sep 19, 2:54 PM CDTFlash Flood Warning EmergencyHGXHarris111 min
Sep 19, 2:58 PM CDTRiver Flood WarningHGXHarris18 hr
Sep 19, 2:58 PM CDTRiver Flood WarningHGXHarris21 hr
Sep 19, 3:01 PM CDTFlash Flood WarningHGXBrazoria, Fort Bend, Matagorda, Wharton119 min
Sep 19, 3:40 PM CDTRiver Flood WarningHGXHarris31 hr
Sep 19, 3:40 PM CDTRiver Flood WarningHGXHarris21 days
Sep 19, 4:18 PM CDTFlash Flood WarningHGXBrazoria, Chambers, Galveston117 min
Sep 19, 4:27 PM CDTRiver Flood WarningHGXGalveston, Harris13 hr
Sep 19, 4:29 PM CDTRiver Flood WarningHGXAustin, Colorado, Fort Bend, Wharton40 hr
Sep 19, 4:34 PM CDTAreal Flood WarningHGXBrazoria, Chambers, Fort Bend, Galveston, Harris, Liberty and 2 more18 hr

Nearby

Flash Flood Warnings in Texas, 2019Every flash flood warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.