Alert archive / Texas / Freeze Warnings in 2012

Freeze Warning 2, NWS Brownsville, TX

January 12, 20127 counties in Texas

NWS Brownsville, TX issued this freeze warning at Jan 12, 2012, 12:53 PM CST for 7 counties in Texas. It took effect at Jan 13, 2012, 12:00 AM CST. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 12, 2012, 12:53 PM CST (18:53 UTC)
In effect from
Jan 13, 2012, 12:00 AM CST
Expired
Jan 13, 2012, 9:00 AM CST
In force
9 hr
Issued by
NWS Brownsville, TX

Counties Brooks 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), 131 km from the middle of the area, began a volume at 19:01 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 12:00Z, 6.9 hours before the alert went out and 134 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-pSkew-T log-p diagram, Brownsville Intl, TX at 12:00Z on 2012-01-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brownsville Intl, TX at 12:00Z on 2012-01-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
552 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

480 
WWUS74 KBRO 121853
NPWBRO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1253 PM CST THU JAN 12 2012

...FREEZE EXPECTED OVER PORTIONS OF THE RIO GRANDE VALLEY AND DEEP
SOUTH TEXAS TONIGHT...

.A STRONG COLD FRONT HAS BROUGHT IN COLDER AND MUCH DRIER AIR TO
THE REGION. WINDS ARE EXPECTED TO DECREASE TONIGHT UNDER PARTLY
CLOUDY SKIES WHICH SHOULD ALLOW MANY LOCATIONS TO DIP BELOW
FREEZING FOR A NUMBER OF HOURS TONIGHT AND FRIDAY MORNING.

TXZ248>254-130600-
/O.NEW.KBRO.FZ.W.0002.120113T0600Z-120113T1500Z/
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INCLUDING THE CITIES OF...ZAPATA...HEBBRONVILLE...FALFURRIAS...
SARITA...RIO GRANDE CITY...ROMA...MCALLEN...EDINBURG...PHARR...
MISSION...WESLACO...RAYMONDVILLE
1253 PM CST THU JAN 12 2012

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CST
FRIDAY...

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CST
FRIDAY. 

* TIMING...LOWS IN THE UPPER 20S TO NEAR 30 ARE EXPECTED IN
  PORTIONS OF BROOKS...JIM HOGG...KENNEDY...ZAPATA AND STARR
  COUNTIES. SPOTS THAT ARE TYPICALLY COLDER MAY DROP INTO THE MID
  20S. TEMPERATURES ARE EXPECTED TO REMAIN BELOW FREEZING FOR FOUR
  TO SIX HOURS. FURTHER SOUTH...IN INLAND WILLACY AND HIDALGO
  COUNTIES LOWS IN THE UPPER 20S TO NEAR FREEZING ARE FORECAST.
  TEMPERATURES ARE EXPECTED TO FALL BELOW FREEZING FOR TWO TO
  THREE HOURS IN THE MCALLEN...MISSION...AND RAYMONDVILLE AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING IS ISSUED WHEN TEMPERATURES ARE EXPECTED TO FALL
TO BETWEEN 28 AND 32 DEGREES FOR 2 OR MORE HOURS OVER A
WIDESPREAD AREA.

RESIDENTS SHOULD COVER OR MOVE INDOORS ANY COLD SENSITIVE
PLANTS...AND BRING PETS INDOORS THIS EVENING.

&&

$$

GIBBS
2 follow-up statements
856 
WWUS74 KBRO 130316 AAA
NPWBRO

URGENT - WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE BROWNSVILLE TX
916 PM CST THU JAN 12 2012

...FREEZE EXPECTED OVER PORTIONS OF THE RIO GRANDE VALLEY AND
DEEP SOUTH TEXAS TONIGHT...

.A STRONG COLD FRONT HAS BROUGHT IN COLDER AND MUCH DRIER AIR TO
THE REGION. WINDS ARE EXPECTED TO DECREASE TONIGHT UNDER PARTLY
CLOUDY SKIES WHICH SHOULD ALLOW MANY LOCATIONS TO DIP BELOW
FREEZING FOR A NUMBER OF HOURS TONIGHT AND FRIDAY MORNING.

TXZ248>254-131200-
/O.CON.KBRO.FZ.W.0002.120113T0600Z-120113T1500Z/
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INCLUDING THE CITIES OF...ZAPATA...HEBBRONVILLE...FALFURRIAS...
SARITA...RIO GRANDE CITY...ROMA...MCALLEN...EDINBURG...PHARR...
MISSION...WESLACO...RAYMONDVILLE
916 PM CST THU JAN 12 2012

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY...

* TIMING...LOWS AROUND 30 ARE EXPECTED IN PORTIONS OF BROOKS...JIM
  HOGG...KENNEDY...ZAPATA AND STARR COUNTIES. SPOTS THAT ARE
  TYPICALLY COLDER MAY BRIEFLY DROP INTO THE UPPER 20S RIGHT
  AROUND DAWN. TEMPERATURES ARE EXPECTED TO REMAIN BELOW FREEZING
  FOR TWO TO FOUR HOURS. FURTHER SOUTH...IN INLAND WILLACY AND
  HIDALGO COUNTIES LOWS OF 30 TO 32 ARE FORECAST. TEMPERATURES ARE
  EXPECTED TO FALL BELOW FREEZING FOR TWO TO THREE HOURS IN THE
  EDINBURG...MISSION...AND RAYMONDVILLE AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING IS ISSUED WHEN TEMPERATURES ARE EXPECTED TO FALL
TO BETWEEN 28 AND 32 DEGREES FOR 2 OR MORE HOURS OVER A
WIDESPREAD AREA.

RESIDENTS SHOULD COVER OR MOVE INDOORS ANY COLD SENSITIVE
PLANTS...AND BRING PETS INDOORS THIS EVENING.

&&

$$
612 
WWUS74 KBRO 131514
NPWBRO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BROWNSVILLE TX
914 AM CST FRI JAN 13 2012

...TEMPERATURES ARE ABOVE FREEZING ACROSS THE RIO GRANDE VALLEY...

.TEMPERATURES ARE STARTING TO RISE THIS MORNING AND WILL CONTINUE 
TO WARM UP DURING THE DAY.

TXZ248>254-131615-
/O.EXP.KBRO.FZ.W.0002.000000T0000Z-120113T1500Z/
ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY-
INCLUDING THE CITIES OF...ZAPATA...HEBBRONVILLE...FALFURRIAS...
SARITA...RIO GRANDE CITY...ROMA...MCALLEN...EDINBURG...PHARR...
MISSION...WESLACO...RAYMONDVILLE
914 AM CST FRI JAN 13 2012

...FREEZE WARNING HAS EXPIRED...

TEMPERATURES WILL REMAIN ABOVE FREEZING THE REST OF THE DAY. 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 11, 9:11 PM CSTSmall Craft AdvisoryBRO31 hr
Jan 12, 2:16 AM CSTRed Flag WarningBROBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 1 more14 hr

Nearby

Freeze Warnings in Texas, 2012Every freeze warning in 2012

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.