Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 4, NWS Corpus Christi, TX

May 1, 2021Aransas County, Refugio County, San Patricio County, Texas

NWS Corpus Christi, TX issued this flash flood warning at May 1, 2021, 2:20 AM CDT for Aransas County, Refugio County, San Patricio County, Texas. It was in force for 70 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 1, 2021, 2:20 AM CDT (07:20 UTC)
Expired: May 1, 2021, 3:30 AM CDT
In force: 70 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Flood severity: None

Counties Aransas County, TX, Refugio County, TX, San Patricio County, TX

The radar

The Corpus Christi radar (KCRP), 30 km from the middle of the area, began a volume at 07:23 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

Corpus Christi, TX (KCRP), launched 00:00Z, 7.3 hours before the alert went out and 34 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: 42 J/kg
Mixed-layer CIN: -278 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

788 
WGUS54 KCRP 010720
FFWCRP
TXC007-391-409-010830-
/O.NEW.KCRP.FF.W.0004.210501T0720Z-210501T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Corpus Christi TX
220 AM CDT Sat May 1 2021

The National Weather Service in Corpus Christi has issued a

* Flash Flood Warning for...
  Northwestern Aransas County in south central Texas...
  Southwestern Refugio County in south central Texas...
  Central San Patricio County in south central Texas...

* Until 330 AM CDT.

* At 220 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Sinton, Odem, St. Paul, Bayside, Bonnie View, West Sinton and 
  Edroy.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

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.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 2793 9765 2806 9776 2813 9758 2813 9757
      2814 9756 2819 9745 2827 9708 2820 9702
      2808 9720 2802 9708 2799 9709 2803 9725
      2804 9743 2791 9748 2787 9747 2786 9747
      2785 9747

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR 

$$

JCP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:01 PM CDT	Special Weather Statement	CRP	Webb	44 min
Apr 30, 7:46 PM CDT	Special Weather Statement	CRP	La Salle	44 min
Apr 30, 8:35 PM CDT	River Flood Warning	CRP	Calhoun, Refugio, Victoria	21 days
Apr 30, 8:38 PM CDT	River Flood Warning	CRP	Victoria	21 days
Apr 30, 11:47 PM CDT	Flash Flood Warning	CRP	Nueces	3 hr
May 1, 12:02 AM CDT	Tornado Warning	CRP	Nueces	18 min
May 1, 12:21 AM CDT	Areal Flood Warning	CRP	Nueces	114 min
May 1, 12:29 AM CDT	Flash Flood Warning	CRP	Aransas, San Patricio	3 hr
May 1, 2:10 AM CDT	Flash Flood Warning	CRP	Nueces	3 hr
May 1, 2:39 AM CDT	Flash Flood Warning	CRP	Calhoun, Refugio, Victoria	3 hr
May 1, 2:57 AM CDT	Flash Flood Warning	CRP	Kleberg, Nueces	3 hr
May 1, 3:32 AM CDT	Flash Flood Warning	CRP	Aransas, Bee, Calhoun, Jim Wells, Live Oak, Nueces and 2 more	3 hr
May 1, 4:22 AM CDT	River Flood Warning	CRP	Nueces	11 hr
May 1, 5:45 AM CDT	Areal Flood Warning	CRP	Calhoun, Goliad, Refugio, Victoria	2 hr
May 1, 5:56 AM CDT	Areal Flood Warning	CRP	Kleberg, Nueces	2 hr
May 1, 6:07 AM CDT	Special Marine Warning	CRP		38 min
May 1, 6:26 AM CDT	Areal Flood Warning	CRP	Aransas, Bee, Calhoun, Jim Wells, Nueces, Refugio and 1 more	94 min
May 1, 9:21 AM CDT	Special Weather Statement	CRP	Dimmit	24 min
May 1, 9:49 AM CDT	Special Weather Statement	CRP	Dimmit	26 min
May 1, 10:48 AM CDT	Small Craft Advisory	CRP		8 hr
May 1, 11:29 AM CDT	Areal Flood Advisory	CRP	Aransas, Kleberg, Nueces, Refugio, San Patricio	2 hr
May 1, 3:28 PM CDT	Areal Flood Advisory	CRP	Aransas, Nueces	2 hr
May 1, 3:40 PM CDT	Areal Flood Advisory	CRP	Bee, Refugio, San Patricio	2 hr
May 1, 5:47 PM CDT	Areal Flood Advisory	CRP	Victoria	118 min

Nearby

Flash Flood Warnings in Texas, 2021 Every flash flood warning in 2021

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.