Alert archive / Texas / Flash Flood Warnings in 2023

Flash Flood Warning 21, NWS Corpus Christi, TX

September 15, 2023Webb County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Sep 15, 2023, 9:37 PM CDT for Webb 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: Sep 15, 2023, 9:37 PM CDT (02:37 UTC)
Expired: Sep 16, 2023, 12:45 AM CDT
In force: 3 hr
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Flood severity: None

County Webb County, TX

The radar

The Corpus Christi radar (KCRP), 202 km from the middle of the area, began a volume at 02:38 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
Sep 15, 10:25 PM CDT	FLASH FLOOD	2 Sse Laredo, TX	Flooding of numerous streets/intersection throughout the city of Laredo. Time estimated based on radar.

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

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 2.6 hours before the alert went out and 218 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: 1944 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1197 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.0

Open this sounding in Storm Lab

The text

As transmitted.

215 
WGUS54 KCRP 160237
FFWCRP
TXC479-160545-
/O.NEW.KCRP.FF.W.0021.230916T0237Z-230916T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Corpus Christi TX
937 PM CDT Fri Sep 15 2023

The National Weather Service in Corpus Christi has issued a

* Flash Flood Warning for...
  South Central Webb County in south central Texas...

* Until 1245 AM CDT.

* At 937 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. The expected rainfall rate is 1 to 3 inches in 1 
  hour. Additional rainfall amounts of 1 to 3 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Laredo, Rio Bravo, Laredo International Airport, St Augustine High 
  School South Laredo, Laredo Community College, Laredo Country 
  Club, Doctors Hospital Of Laredo, Texas A&M, United South High 
  School, Orvil and Ranchos Penitas West.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 2766 9967 2770 9963 2771 9957 2767 9949
      2757 9942 2745 9939 2737 9939 2735 9949
      2736 9950 2749 9948 2750 9950 2750 9953
      2756 9951 2761 9954 2760 9958 2762 9958
      2764 9960 2764 9962 2763 9964 2763 9966

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR

$$

TE

The office that day

Everything else NWS Corpus Christi, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 15, 7:02 PM CDT	Special Weather Statement	CRP	Goliad	43 min
Sep 15, 7:09 PM CDT	Special Weather Statement	CRP	Bee	36 min
Sep 15, 7:19 PM CDT	Special Weather Statement	CRP	La Salle	41 min
Sep 15, 7:29 PM CDT	Severe Thunderstorm Warning	CRP	Duval, La Salle, McMullen, Webb	46 min
Sep 15, 7:40 PM CDT	Severe Thunderstorm Warning	CRP	Bee, San Patricio	24 min
Sep 15, 7:46 PM CDT	Special Weather Statement	CRP	Refugio	44 min
Sep 15, 8:01 PM CDT	Special Weather Statement	CRP	Duval, McMullen, Webb	44 min
Sep 15, 8:04 PM CDT	Special Weather Statement	CRP	San Patricio	26 min
Sep 15, 8:23 PM CDT	Areal Flood Advisory	CRP	Duval, La Salle, Webb	3 hr
Sep 15, 8:32 PM CDT	Special Weather Statement	CRP	Refugio, San Patricio	28 min
Sep 15, 8:44 PM CDT	Special Weather Statement	CRP	McMullen, Webb	46 min
Sep 15, 9:01 PM CDT	Special Weather Statement	CRP	San Patricio	29 min
Sep 15, 9:06 PM CDT	Special Marine Warning	CRP		54 min
Sep 15, 9:22 PM CDT	Areal Flood Advisory	CRP	Webb	3 hr
Sep 15, 9:28 PM CDT	Special Weather Statement	CRP	Webb	47 min
Sep 15, 9:32 PM CDT	Special Weather Statement	CRP	Nueces	28 min
Sep 15, 9:32 PM CDT	Special Weather Statement	CRP	Duval	43 min
Sep 15, 9:48 PM CDT	Severe Thunderstorm Warning	CRP	Webb	42 min
Sep 15, 9:58 PM CDT	Special Marine Warning	CRP		62 min
Sep 15, 9:59 PM CDT	Areal Flood Advisory	CRP	Webb	3 hr
Sep 15, 10:06 PM CDT	Special Marine Warning	CRP		54 min
Sep 15, 10:15 PM CDT	Severe Thunderstorm Warning	CRP	Duval	17 min
Sep 15, 10:18 PM CDT	Areal Flood Advisory	CRP	Duval	3 hr
Sep 15, 10:23 PM CDT	Areal Flood Advisory	CRP	Webb	3 hr
Sep 15, 10:29 PM CDT	Special Weather Statement	CRP	Webb	46 min
Sep 15, 10:34 PM CDT	Special Weather Statement	CRP	Duval	41 min
Sep 15, 11:14 PM CDT	Special Weather Statement	CRP	Duval	46 min
Sep 15, 11:57 PM CDT	Special Weather Statement	CRP	Duval	33 min
Sep 16, 3:12 PM CDT	Areal Flood Advisory	CRP	Victoria	103 min
Sep 16, 3:37 PM CDT	Special Weather Statement	CRP	Kleberg	23 min
Sep 16, 4:00 PM CDT	Special Weather Statement	CRP	Kleberg	30 min
Sep 16, 4:36 PM CDT	Special Weather Statement	CRP	Refugio	24 min
Sep 16, 5:24 PM CDT	Special Weather Statement	CRP	San Patricio	36 min
Sep 16, 5:50 PM CDT	Special Weather Statement	CRP	Refugio	25 min
Sep 16, 6:00 PM CDT	Special Weather Statement	CRP	San Patricio	30 min
Sep 16, 6:19 PM CDT	Special Weather Statement	CRP	Aransas	26 min

Nearby

Flash Flood Warnings in Texas, 2023 Every flash flood warning in 2023

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.