Alert archive / Texas / Flash Flood Watches in 2015

Flash Flood Watch 4, NWS Brownsville, TX

April 13, 20158 counties in Texas

NWS Brownsville, TX issued this flash flood watch at Apr 13, 2015, 9:33 PM CDT for 8 counties in Texas. It took effect at Apr 14, 2015, 7:00 AM CDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Apr 13, 2015, 9:33 PM CDT (02:33 UTC)
In effect from: Apr 14, 2015, 7:00 AM CDT
Expired: Apr 14, 2015, 7:00 PM CDT
In force: 12 hr
Issued by: NWS Brownsville, TX
Flood severity: None

Counties Brooks County, TX, Cameron County, TX, Hidalgo County, TX, Jim Hogg County, TX, Kenedy County, TX, Starr County, TX, Willacy County, TX, Zapata County, TX

The radar

The Brownsville radar (KBRO), 118 km from the middle of the area, began a volume at 02:36 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, 2.6 hours before the alert went out and 120 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: 1884 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 978 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Apr 13, 8:15 PM CDT, 1 hour 18 minutes earlier.

Area forecast discussion, Apr 13, 8:15 PM CDT, 1 hour 18 minutes before

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Hazardous weather outlook, Apr 13, 7:50 PM CDT, 1 hour 43 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BROWNSVILLE TX
750 PM CDT MON APR 13 2015

TXZ248>257-150100-
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON-
750 PM CDT MON APR 13 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF DEEP SOUTH
TEXAS.

.DAY ONE...TONIGHT

A FEW STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE TONIGHT. IF
THUNDERSTORMS BECOME SEVERE LARGE HAIL AND DAMAGING WINDS WILL BE
THE MAIN THREATS...ALONG WITH HEAVY RAINFALL AND DANGEROUS CLOUD
TO GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE APPROACH OF A COLD FRONT TUESDAY MAY PRODUCE ADDITIONAL
THUNDERSTORMS AND A FLOOD RISK ON TUESDAY. ADDITIONAL STORMS ARE
POSSIBLE WEDNESDAY AND THURSDAY.

AN ELEVATED RISK OF RIP CURRENTS IS EXPECTED FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

GMZ130-132-135-150-155-170-175-150100-
LAGUNA MADRE FROM THE PORT OF BROWNSVILLE TO THE ARROYO COLORADO-
LAGUNA MADRE FROM THE ARROYO COLORADO TO 5 NM NORTH OF PORT
MANSFIELD TX-
LAGUNA MADRE FROM 5 NM NORTH OF PORT MANSFIELD TO BAFFIN BAY TX-
COASTAL WATERS FROM PORT MANSFIELD TO THE RIO GRANDE OUT 20 NM-
COASTAL WATERS FROM BAFFIN BAY TO PORT MANSFIELD OUT 20 NM-
WATERS FROM PORT MANSFIELD TO THE RIO GRANDE EXTENDING FROM 20 TO
60 NM-
WATERS FROM BAFFIN BAY TO PORT MANSFIELD EXTENDING FROM 20 TO
60 NM-
750 PM CDT MON APR 13 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE GULF OF
MEXICO AND THE LAGUNA MADRE.

.DAY ONE...TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ORGANIZED THUNDERSTORMS ARE POSSIBLE TUESDAY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, Apr 13, 4:55 PM CDT, 4 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
455 PM CDT MON APR 13 2015

TXZ249-132245-
JIM HOGG TX-
455 PM CDT MON APR 13 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JIM HOGG COUNTY
UNTIL 545 PM CDT...

AT 454 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
THOMPSONVILLE...OR 15 MILES SOUTHWEST OF JIM HOGG COUNTY AIRPORT...
MOVING EAST AT 20 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
JIM HOGG COUNTY AIRPORT...HEBBRONVILLE...HEBBRONVILLE HIGH SCHOOL...
GRUY STADIUM...LAS LOMITAS...SOUTH FORK ESTATES...THOMPSONVILLE AND
HEBBRONVILLE BORDER PATROL STATION.

THIS STORM 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.

LAT...LON 2709 9859 2711 9895 2727 9895 2727 9880
      2735 9880 2736 9863
TIME...MOT...LOC 2154Z 262DEG 19KT 2716 9888

BIRCHFIELD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 10:15 PM CDT	Special Weather Statement	BRO	Hidalgo	45 min
Apr 13, 10:19 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	25 min
Apr 13, 10:47 PM CDT	Special Weather Statement	BRO	Hidalgo	43 min
Apr 14, 5:35 AM CDT	Special Weather Statement	BRO	Jim Hogg	40 min
Apr 14, 6:18 AM CDT	Special Weather Statement	BRO	Jim Hogg	42 min
Apr 14, 6:26 AM CDT	Areal Flood Advisory	BRO	Brooks	2 hr
Apr 14, 6:35 AM CDT	Special Weather Statement	BRO	Brooks, Kenedy, Starr	40 min
Apr 14, 7:18 AM CDT	Flash Flood Warning	BRO	Brooks	87 min
Apr 14, 7:23 AM CDT	Special Weather Statement	BRO	Zapata	52 min
Apr 14, 7:32 AM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	118 min
Apr 14, 7:46 AM CDT	Special Weather Statement	BRO	Hidalgo, Kenedy, Starr, Willacy	89 min
Apr 14, 8:00 AM CDT	Special Marine Warning	BRO		45 min
Apr 14, 8:07 AM CDT	Areal Flood Advisory	BRO	Kenedy	113 min
Apr 14, 8:11 AM CDT	Special Weather Statement	BRO	Starr	49 min
Apr 14, 8:43 AM CDT	Flash Flood Warning	BRO	Brooks	2 hr
Apr 14, 8:47 AM CDT	Special Marine Warning	BRO		43 min
Apr 14, 9:35 AM CDT	Special Weather Statement	BRO	Brooks	40 min
Apr 14, 9:37 AM CDT	Special Weather Statement	BRO	Starr	38 min
Apr 14, 10:10 AM CDT	Special Weather Statement	BRO	Kenedy	50 min
Apr 14, 10:13 AM CDT	Special Weather Statement	BRO	Starr	47 min
Apr 14, 10:34 AM CDT	Areal Flood Advisory	BRO	Hidalgo, Starr	116 min
Apr 14, 10:48 AM CDT	Special Weather Statement	BRO	Jim Hogg	42 min
Apr 14, 10:59 AM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Kenedy, Willacy	46 min
Apr 14, 11:48 AM CDT	Special Marine Warning	BRO		42 min
Apr 14, 2:07 PM CDT	Special Weather Statement	BRO	Cameron	38 min
Apr 14, 2:44 PM CDT	Special Marine Warning	BRO		31 min
Apr 14, 3:08 PM CDT	Special Marine Warning	BRO		52 min

Nearby

Flash Flood Watches in Texas, 2015 Every flash flood watch 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.