Alert archive / Texas / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 33, NWS Brownsville, TX

April 24, 2004Hidalgo County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Apr 24, 2004, 11:04 PM CDT for Hidalgo County, Texas. It was in force for 26 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: Apr 24, 2004, 11:04 PM CDT (04:04 UTC)
Expired: Apr 24, 2004, 11:30 PM CDT
In force: 26 min
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

County Hidalgo County, TX

The radar

The Brownsville radar (KBRO), 84 km from the middle of the area, began a volume at 04:04 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 4.1 hours before the alert went out and 86 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: 2399 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

689 
WUUS54 KBRO 250404
SVRBRO
TXC215-250430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1102 PM CDT SAT APR 24 2004

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HIDALGO COUNTY IN DEEP SOUTH TEXAS

* UNTIL 1130 PM CDT

* AT 1058 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM LOCATED NEAR HIDALGO...DRIFTING SLOWLY EAST.

* THE SEVERE THUNDERSTORM MAY ENCOMPASS THE CITY OF HIDALGO DURING 
  THE NEXT HALF HOUR...BUT SHOULD GENERALLY BE CONFINED TO AREAS OF
  HIDALGO COUNTY ALONG THE RIO GRANDE.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 2618 9834 2601 9838 2593 9809 2615 9804

$$

PHILO

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 24, 9:45 PM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, Apr 24, 9:45 PM CDT, 1 hour 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
945 PM CDT SAT APR 24 2004

.DISCUSSION...12Z KBRO UPPER AIR SOUNDING SHOWS AN INVERSION AT 950
MB THIS MORNING. THE INVERSION IS NOT AS STRONG AS YESTERDAY AND 150
MB CLOSER TO THE SURFACE. THE ATMOPHERE ABOVE THE INVERSION IS
ALMOST AS UNSTABLE AS YESTERDAY. THUNDERSTORMS ARE EXPECTED TO
DEVELOP IN THE AFTERNOON AND MAY BE STRONG. SURFACE OBSERVATION
PLOTS SHOW A WIND SHIFT BOUNDARY OVER DEEP SOUTH TEXAS...WITH
NORTHEAST WINDS OVER THE NORTHERN TIER OF COUNTIES AND SOUTHEAST
WINDS ALONG THE RIO GRANDE RIVER. STRATUS HAS FILLED IN OVER THE
AREA AND WILL HELP DELAY SURFACE HEATING SOMEWHAT.
&&

.MARINE...SMALL CRAFT ADVISORIES WILL BE NECESSARY TODAY WITH SEAS 8
TO 10 FEET. SOUTHEAST WINDS OF 25 KNOTS WILL PERSIST THROUGH THE
COASTAL WATER TODAY WITH 15 TO 20 KNOTS OVER THE LAGUNA MADRE.

EXPECT INCREASING CHANCES FOR THUNDERSTORMS FOR THE LOWER TEXAS
COASTAL WATERS AS A POLAR BOUNDARY APPROACHES ON SUNDAY. EXPECT A
WIND SHIFT FROM SOUTHEAST TO NORTHEAST BY MONDAY AS HIGH PRESSURE
MOVES IN FROM THE NORTH.
&&

.AVIATION...EXPECT MVFR WEATHER THROUGH 24/20Z WITH INCREASING
CHANCES FOR THUNDERSTORMS AFTER 20Z. IFR CONDITIONS ARE LIKELY AFTER
25/00Z DUE TO CEILINGS BELOW 1000 FEET AND THUNDERSTORMS IN THE
VICINITY OF DEEP SOUTH TEXAS AIRFIELDS.
&&

.BRO WATCHES/WARNINGS/ADVISORIES...SCA FOR GMZ130-150-170-175.
&&

SYNOPTIC/GRIDS...69
AVIATION/MARINE...53
MESO...VEGA

THIS PRODUCT IS ALSO AVAILABLE ON OUR INTERNET WEB PAGE AT:
HTTP://WWW.SRH.NOAA.GOV/BRO

Hazardous weather outlook, Apr 24, 4:39 PM CDT, 6 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BROWNSVILLE TX
439 PM CDT SAT APR 24 2004

TXZ248>257-251100-
BROOKS-COASTAL CAMERON-COASTAL WILLACY-HIDALGO-INLAND CAMERON-
INLAND WILLACY-JIM HOGG-KENEDY-STARR-ZAPATA-
439 PM CDT SAT APR 24 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.

A SMALL CRAFT ADVISORY REMAINS IN EFFECT OVER THE COASTAL WATERS
OF DEEP SOUTH TEXAS DUE TO SWELLS NEAR 7 FEET.

DEEP SOUTH TEXAS CAN EXPECT SCATTERED SHOWERS AND THUNDERSTORMS AS A
COLD FRONT APPROACHES. SOME SEVERE STORMS COULD DEVELOP THIS
AFTERNOON AND TONIGHT...PRODUCING FREQUENT LIGHTNING...DAMAGING
WINDS...LOCALLY HEAVY RAINFALL...AND HAIL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THUNDERSTORM POTENTIAL WILL CONTINUE ON SUNDAY...WITH RAIN CHANCES
LINGERING THROUGH EARLY TUESDAY BEFORE HIGH PRESSURE TAKES CONTROL.
RAIN CHANCES WILL DECREASE TUESDAY THROUGH FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED LATER TODAY AND TONIGHT.

59

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 7:56 PM CDT	Severe Thunderstorm Warning	BRO	Starr	49 min
Apr 25, 3:33 AM CDT	Flash Flood Warning	BRO	Kenedy	117 min
Apr 25, 4:24 AM CDT	Special Marine Warning	BRO		66 min
Apr 25, 4:24 AM CDT	Special Marine Warning	BRO		66 min
Apr 25, 5:25 AM CDT	Special Marine Warning	BRO		65 min

Nearby

Severe Thunderstorm Warnings in Texas, 2004 Every severe thunderstorm warning in 2004

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.