Alert archive / Texas / Flash Flood Warnings in 2017

Flash Flood Warning 13, NWS Houston/Galveston, TX

May 28, 2017Houston County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at May 28, 2017, 8:29 PM CDT for Houston 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: May 28, 2017, 8:29 PM CDT (01:29 UTC)
Expired: May 28, 2017, 11:30 PM CDT
In force: 3 hr
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Flood severity: None

County Houston County, TX

The radar

The Ft Hood radar (KGRK), 174 km from the middle of the area, began a volume at 01:29 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

Time	Report	Where	Remark
May 28, 11:15 PM CDT	FLASH FLOOD	7 Sw Crockett, TX	WIDESPREAD STREET FLOODING ACROSS THE COUNTY.

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.5 hours before the alert went out and 229 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 157 J/kg
Mixed-layer CIN: -413 J/kg
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -175 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

223 
WGUS54 KHGX 290129
FFWHGX
TXC225-290430-
/O.NEW.KHGX.FF.W.0013.170529T0129Z-170529T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Houston/Galveston TX
829 PM CDT SUN MAY 28 2017

The National Weather Service in League City has issued a

* Flash Flood Warning for...
  West central Houston County in southeastern Texas...

* Until 1130 PM CDT.

* At 828 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 3 to 5 inches of rain have 
  fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Austonio.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3120 9542 3106 9565 3108 9566 3109 9576
      3114 9577 3116 9573 3121 9575 3123 9573
      3127 9573 3129 9568 3132 9566 3134 9566
      3135 9568 3136 9566 3140 9570 3145 9571
      3146 9575 3147 9572 3150 9574 3151 9572

$$
11

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:22 PM CDT	Areal Flood Advisory	HGX	Houston	113 min
May 28, 7:28 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Grimes	32 min
May 28, 7:32 PM CDT	Special Weather Statement	HGX	Houston	43 min
May 28, 7:49 PM CDT	Flash Flood Warning	HGX	Houston	2 hr
May 28, 7:58 PM CDT	Special Weather Statement	HGX	Brazos, Burleson	47 min
May 28, 8:11 PM CDT	Special Weather Statement	HGX	Houston, Madison, Trinity	64 min
May 28, 8:18 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson	27 min
May 28, 8:33 PM CDT	Severe Thunderstorm Warning	HGX	Grimes, Houston, Madison, Walker	42 min
May 28, 8:40 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Washington	31 min
May 28, 8:53 PM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Grimes, Washington	26 min
May 28, 9:09 PM CDT	Severe Thunderstorm Warning	HGX	Grimes, Houston, Madison, Montgomery, Trinity, Walker	51 min
May 28, 9:14 PM CDT	Areal Flood Advisory	HGX	Houston, Trinity	2 hr
May 28, 9:31 PM CDT	Special Weather Statement	HGX	Polk, San Jacinto	29 min
May 28, 9:56 PM CDT	Special Weather Statement	HGX	Montgomery, Polk, San Jacinto, Walker	34 min
May 28, 10:05 PM CDT	Flash Flood Warning	HGX	Houston	85 min
May 28, 10:43 PM CDT	Special Weather Statement	HGX	Waller	47 min
May 28, 11:27 PM CDT	Flash Flood Warning	HGX	Houston	3 hr
May 28, 11:34 PM CDT	Special Marine Warning	HGX		56 min
May 28, 11:36 PM CDT	Special Weather Statement	HGX	Chambers, Harris	39 min
May 28, 11:54 PM CDT	Special Weather Statement	HGX	Houston	66 min
May 29, 12:23 AM CDT	Special Marine Warning	HGX		67 min
May 29, 12:28 AM CDT	Special Weather Statement	HGX	Galveston	47 min
May 29, 12:37 AM CDT	Areal Flood Advisory	HGX	Fort Bend, Harris	113 min
May 29, 1:02 AM CDT	Special Marine Warning	HGX		118 min
May 29, 1:05 AM CDT	Special Weather Statement	HGX	Brazoria, Galveston	40 min
May 29, 1:16 AM CDT	Areal Flood Advisory	HGX	Brazoria, Fort Bend, Matagorda, Wharton	3 hr
May 29, 1:45 AM CDT	Special Weather Statement	HGX	Brazoria	45 min
May 29, 2:23 AM CDT	Areal Flood Warning	HGX	Houston	3 hr
May 29, 2:31 AM CDT	Special Marine Warning	HGX		119 min
May 29, 2:47 AM CDT	Small Craft Advisory	HGX		4 hr
May 29, 4:41 AM CDT	Special Marine Warning	HGX		2 hr
May 29, 4:43 AM CDT	Special Marine Warning	HGX		2 hr
May 29, 5:03 AM CDT	Special Marine Warning	HGX		117 min
May 29, 6:50 AM CDT	Gale Warning	HGX		6 hr
May 29, 6:50 AM CDT	Small Craft Advisory	HGX		6 hr
May 29, 9:20 AM CDT	Coastal Flood Advisory	HGX	Brazoria, Chambers, Galveston, Matagorda	7 hr
May 29, 9:29 AM CDT	Wind Advisory	HGX	Brazoria, Chambers, Galveston, Matagorda	7 hr

Nearby

Flash Flood Warnings in Texas, 2017 Every flash flood warning in 2017

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.