Alert archive / Texas / Areal Flood Advisories in 2015

Areal Flood Advisory 21, NWS Brownsville, TX

April 13, 2015Cameron County, Texas

NWS Brownsville, TX issued this areal flood advisory at Apr 13, 2015, 12:12 AM CDT for Cameron County, Texas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Apr 13, 2015, 12:12 AM CDT (05:12 UTC)
Expired: Apr 13, 2015, 2:15 AM CDT
In force: 2 hr
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 27 km from the middle of the area, began a volume at 05:12 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 5.2 hours before the alert went out and 29 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: 2009 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 859 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Brownsville, TX wrote its last area forecast discussion before this areal flood advisory went out at Apr 12, 11:55 PM CDT, 17 minutes earlier.

Area forecast discussion, Apr 12, 11:55 PM CDT, 17 minutes before

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Hazardous weather outlook, Apr 13, 12:05 AM CDT, 7 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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In the hours before

Special weather statement, Apr 12, 8:17 PM CDT, 3 hours 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
817 PM CDT SUN APR 12 2015

TXZ248-130215-
ZAPATA TX-
817 PM CDT SUN APR 12 2015

...SIGNIFICANT WEATHER ADVISORY FOR ZAPATA COUNTY UNTIL 915 PM CDT...

AT 812 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM
25 MILES WEST OF EL CENIZO TO 56 MILES SOUTHWEST OF FALCON
MESA. THESE THUNDERSTORMS ARE MOVING EAST AT 40 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
ZAPATA...BUSTAMANTE...ZAPATA COUNTY AIRPORT...MEDINA...ZAPATA MIDDLE
SCHOOL...LOPENO...LAS PALMAS...ESCOBAS...ZAPATA HIGH SCHOOL...ZAPATA
COUNTY PUBLIC LIBRARY...FALCON LAKE ESTATES...ZAPATA COUNTY FIRE
DEPARTMENT...FALCON SHORES...FALCON MESA...NEW FALCON...SIESTA
SHORES AND ROMEO T. FLORES PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
ZAPATA COUNTY.

LAT...LON 2709 9943 2718 9943 2727 9945 2732 9938
      2727 9933 2727 9896 2678 9895 2668 9901
      2657 9917 2672 9921 2675 9924 2685 9927
      2687 9932 2692 9932 2693 9938 2696 9939
      2698 9938 2702 9942 2702 9945 2706 9945
TIME...MOT...LOC 0112Z 274DEG 41KT 2731 9991 2655 10014

TRS

Local storm report, Apr 12, 9:43 PM CDT, 2 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
943 PM CDT SUN APR 12 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0917 PM     TSTM WND DMG     ZAPATA                  26.89N  99.26W
04/12/2015                   ZAPATA             TX   OTHER FEDERAL

            SEVERAL TREES REPORTED DOWN IN ZAPATA. TIME ESTIMATED
            FROM RADAR.

&&

EVENT NUMBER BRO1500019

BIRCHFIELD

Local storm report, Apr 12, 9:49 PM CDT, 2 hours 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
949 PM CDT SUN APR 12 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0947 PM     TSTM WND DMG     ZAPATA                  26.89N  99.26W
04/12/2015                   ZAPATA             TX   TRAINED SPOTTER

            TRAINED WEATHER SPOTTER REPORTED DOWNED POWER POLE IN
            THE CITY OF ZAPATA

&&

EVENT NUMBER BRO1500020

BAS

Local storm report, Apr 12, 10:14 PM CDT, 1 hour 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1014 PM CDT SUN APR 12 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0925 PM     TSTM WND DMG     ZAPATA                  26.89N  99.26W
04/12/2015                   ZAPATA             TX   OTHER FEDERAL

            TREES DOWN IN 1ST AND HIGHWAY 83.

&&

EVENT NUMBER BRO1500022

MT

Local storm report, Apr 12, 11:27 PM CDT, 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1127 PM CDT SUN APR 12 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1105 PM     TSTM WND DMG     MCALLEN                 26.22N  98.24W
04/12/2015                   HIDALGO            TX   LAW ENFORCEMENT

            TREES DOWN AT FRONTAGE AND BICENTENNIAL IN MCALLEN.

&&

EVENT NUMBER BRO1500023

BIRCHFIELD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 8:17 PM CDT	Special Weather Statement	BRO	Zapata	58 min
Apr 12, 8:33 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg, Starr, Zapata	57 min
Apr 12, 9:08 PM CDT	Tornado Warning	BRO	Zapata	22 min
Apr 12, 9:32 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Jim Hogg, Starr, Zapata	58 min
Apr 12, 9:37 PM CDT	Areal Flood Advisory	BRO	Jim Hogg, Starr, Zapata	113 min
Apr 12, 10:27 PM CDT	Flash Flood Warning	BRO	Starr	3 hr
Apr 12, 10:28 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 1 more	62 min
Apr 12, 10:37 PM CDT	Special Marine Warning	BRO		113 min
Apr 12, 10:45 PM CDT	Flash Flood Warning	BRO	Hidalgo	3 hr
Apr 12, 11:00 PM CDT	Areal Flood Advisory	BRO	Brooks	3 hr
Apr 12, 11:29 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo, Kenedy, Willacy	61 min
Apr 13, 12:23 AM CDT	Special Marine Warning	BRO		67 min
Apr 13, 12:38 AM CDT	Special Weather Statement	BRO	Cameron	37 min
Apr 13, 1:26 AM CDT	Special Marine Warning	BRO		49 min
Apr 13, 1:43 AM CDT	Flash Flood Warning	BRO	Hidalgo	2 hr
Apr 13, 2:03 AM CDT	Special Weather Statement	BRO	Willacy	42 min
Apr 13, 2:14 AM CDT	Special Marine Warning	BRO		46 min
Apr 13, 3:08 AM CDT	Areal Flood Advisory	BRO	Cameron, Hidalgo, Willacy	3 hr
Apr 13, 3:36 AM CDT	Special Weather Statement	BRO	Cameron	54 min
Apr 13, 3:59 AM CDT	Special Marine Warning	BRO		61 min
Apr 13, 4:11 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	34 min
Apr 13, 4:43 AM CDT	Special Marine Warning	BRO		32 min
Apr 13, 4:51 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	39 min
Apr 13, 9:15 AM CDT	Special Marine Warning	BRO		60 min
Apr 13, 2:27 PM CDT	Special Weather Statement	BRO	Zapata	48 min
Apr 13, 3:13 PM CDT	Special Weather Statement	BRO	Zapata	47 min
Apr 13, 3:22 PM CDT	Severe Thunderstorm Warning	BRO	Zapata	38 min
Apr 13, 3:57 PM CDT	Severe Thunderstorm Warning	BRO	Zapata	48 min
Apr 13, 4:55 PM CDT	Special Weather Statement	BRO	Jim Hogg	50 min

Nearby

Areal Flood Advisories in Texas, 2015 Every areal flood advisory in 2015

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.