Alert archive / Texas / Flash Flood Warnings in 2013

Flash Flood Warning 21, NWS Houston/Galveston, TX

October 31, 2013Polk County, San Jacinto County, Trinity County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Oct 31, 2013, 4:55 AM CDT for Polk County, San Jacinto County, Trinity County, Texas. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Oct 31, 2013, 4:55 AM CDT (09:55 UTC)
Expired
Oct 31, 2013, 8:00 AM CDT
In force
3 hr
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Flood severity
None

Counties Polk County, TX, San Jacinto County, TX, Trinity County, TX

The radar

The Ft Polk radar (KPOE), 175 km from the middle of the area, began a volume at 09:56 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.

What was reported inside it

TimeReportWhereRemark
Oct 31, 8:00 AM CDTFLASH FLOOD16 Nnw Livingston, TXFM 350N...NORTH OF FM 942...CLOSED DUE TO HIGH WATER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.9 hours before the alert went out and 189 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 00:00Z on 2013-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 129 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 00:00Z on 2013-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.19395878Sfc1 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
129 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
728 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
330 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

884 
WGUS54 KHGX 310955
FFWHGX
TXC373-407-455-311300-
/O.NEW.KHGX.FF.W.0021.131031T0955Z-131031T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
455 AM CDT THU OCT 31 2013

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN TRINITY COUNTY IN SOUTHEAST TEXAS...
  NORTHERN SAN JACINTO COUNTY IN SOUTHEAST TEXAS...
  POLK COUNTY IN SOUTHEAST TEXAS...

* UNTIL 800 AM CDT

* AT 453 AM CDT...DOPPLER RADAR INDICATED CONTINUED TRAINING SHOWERS 
  AND THUNDERSTORMS ACROSS THE WARNED AREA. FOUR TO SIX INCHES OF 
  RAIN HAS FALLEN SINCE YESTERDAY AND ADDITIONAL HEAVY RAIN WILL 
  QUICKLY RUNOFF TO CAUSE FLASH FLOODING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LIVINGSTON...APPLE SPRINGS...ONALASKA...CORRIGAN...POINT BLANK...
  SEVEN OAKS...LAKE LIVINGSTON STATE PARK...WEST LIVINGSTON...LEGGETT
  AND MOSCOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3101 9465 3094 9464 3060 9504 3076 9530
      3134 9492 3132 9490 3129 9490 3129 9488
      3126 9490 3123 9486 3115 9485 3110 9474
      3111 9471 3109 9466 3110 9465 3106 9456

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 31, 1:50 AM CDTSpecial Weather StatementHGXBurleson40 min
Oct 31, 2:41 AM CDTAreal Flood AdvisoryHGXPolk, San Jacinto, Trinity2 hr
Oct 31, 4:51 AM CDTAreal Flood AdvisoryHGXAustin, Fort Bend, Harris, Montgomery, Waller114 min
Oct 31, 5:59 AM CDTAreal Flood AdvisoryHGXChambers, Harris, Liberty2 hr
Oct 31, 7:07 AM CDTAreal Flood AdvisoryHGXHarris, Montgomery113 min
Oct 31, 8:02 AM CDTAreal Flood AdvisoryHGXBrazoria, Chambers, Fort Bend, Galveston, Harris, Liberty118 min
Oct 31, 9:56 AM CDTRiver Flood WarningHGXColorado, Liberty, Polk, Wharton4 days
Oct 31, 9:56 AM CDTRiver Flood WarningHGXBrazos, Burleson, Grimes, Lee, Madison5 days
Oct 31, 9:56 AM CDTRiver Flood WarningHGXBrazos, Grimes, Harris, Madison6 days
Oct 31, 10:15 AM CDTAreal Flood AdvisoryHGXBrazoria, Chambers, Fort Bend, Galveston, Harris3 hr
Oct 31, 10:35 AM CDTAreal Flood AdvisoryHGXAustin, Brazoria, Colorado, Fort Bend, Galveston, Harris and 3 more3 hr
Oct 31, 10:49 AM CDTSpecial Marine WarningHGX56 min
Oct 31, 11:02 AM CDTFlash Flood WarningHGXBrazoria, Fort Bend, Galveston, Harris3 hr
Oct 31, 11:13 AM CDTAreal Flood AdvisoryHGXBrazoria, Fort Bend, Matagorda, Wharton3 hr
Oct 31, 11:14 AM CDTRiver Flood WarningHGXLiberty, Polk65 hr
Oct 31, 11:14 AM CDTRiver Flood WarningHGXBurleson, Lee42 hr
Oct 31, 11:27 AM CDTRiver Flood WarningHGXHarris24 hr
Oct 31, 12:06 PM CDTRiver Flood WarningHGXGalveston, Harris22 hr
Oct 31, 12:10 PM CDTAreal Flood AdvisoryHGXWharton3 hr
Oct 31, 12:45 PM CDTRiver Flood WarningHGXGalveston, Harris22 hr
Oct 31, 12:56 PM CDTSpecial Marine WarningHGX2 hr
Oct 31, 1:15 PM CDTRiver Flood WarningHGXHarris21 hr
Oct 31, 2:13 PM CDTSpecial Marine WarningHGX2 hr
Oct 31, 4:20 PM CDTSpecial Marine WarningHGX85 min

Nearby

Flash Flood Warnings in Texas, 2013Every flash flood warning in 2013

Sources

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