Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 1, NWS Corpus Christi, TX

April 30, 2021Nueces County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Apr 30, 2021, 11:47 PM CDT for Nueces County, Texas. It was in force for 3 hr. 2 reports 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: Apr 30, 2021, 11:47 PM CDT (04:47 UTC)
Expired: May 1, 2021, 2:45 AM CDT
In force: 3 hr
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Flood severity: None

County Nueces County, TX

The radar

The Corpus Christi radar (KCRP), 20 km from the middle of the area, began a volume at 04:50 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 1, 12:16 AM CDT	FLASH FLOOD	2 Ene Flour Bluff, TX	REPORT OF HEB PARKING LOT AND NEARBY STREETS FLOODED WITH STRANDED CARS.
May 1, 12:30 AM CDT	FLASH FLOOD	6 Wnw Flour Bluff, TX	FLOODED STREETS HAVE BEEN REPORTED NEAR THE INTERSECTION OF SARATOGA AND EVERHEART. TIME IS ESTIMATED FROM RADAR AND PHONE CALL.

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, 4.8 hours before the alert went out and 6 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.

170 
WGUS54 KCRP 010447
FFWCRP
TXC355-010745-
/O.NEW.KCRP.FF.W.0001.210501T0447Z-210501T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Corpus Christi TX
1147 PM CDT Fri Apr 30 2021

The National Weather Service in Corpus Christi has issued a

* Flash Flood Warning for...
  Southeastern Nueces County in south central Texas...

* Until 245 AM CDT.

* At 1147 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 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...
  Corpus Christi, Bay Area Medical Center, Texas A&M University 
  Corpus Christi, Spohn Hospital South, La Palmera Mall, Flour 
  Bluff, Corpus Christi Country Club, Waldron Field, Kings Crossing 
  Subdivision and Corpus Christi Naval Air Station.

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 2767 9741 2771 9743 2775 9737 2770 9725
      2769 9724 2766 9727 2761 9730 2764 9740

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 3 HOURS 

$$

EMF

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
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, 2:20 AM CDT	Flash Flood Warning	CRP	Aransas, Refugio, San Patricio	70 min
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.