Rather than a METAR, it looks like the header on a message from the NWS. Using
http://www.nws.noaa.gov/emwin/winugc.htm as a source, this means:
TXZ173-183-191>194-202>209-217>225-228
probably implies "the following applies to Zones TXZ173,TXZ183,TXZ191...TXZ194,TXZ202...TXZ209,TXZ217...TXZ225,TXZ228"
where TXZ191...TXZ194 means TXZ191,TXZ192,TXZ193,TXZ194
-101130- product to be purged on DDHHMM or July 10 at 11:30Z
/O.CON.KEWX.HT.Y.0004. (originating NWS office? and sequence number (0004)?)
000000T0000Z-090711T0000Z timestamp valid from YYMMDDtHHMM 'zulu' time so anytime (000000T0000Z) to July, 11, 2009 at 00:00 GMT
I think the advisory you're looking at was
Heat Advisory
Williamson (Texas)
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
302 PM CDT FRI JUL 10 2009
...HEAT ADVISORY REMAINS IN EFFECT THROUGH 7 PM CDT SATURDAY FOR
MUCH OF SOUTH CENTRAL TEXAS...
.INTENSE HIGH PRESSURE CONTINUES OVER THE AREA. A SOUTHERLY FLOW
IN THE LOWER LEVELS OF THE ATMOSPHERE WILL MAINTAIN HIGH HEAT
INDEX VALUES LATE THIS AFTERNOON INTO EARLY EVENING AS WELL AS
TOMORROW AFTERNOON.
TXZ173-183-191>194-202>209-217>225-228-110415-
/O.EXT.KEWX.HT.Y.0004.000000T0000Z-090712T0000Z/
WILLIAMSON-VAL VERDE-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE-MEDINA-
BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA-FRIO-
ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT-
INCLUDING THE CITIES OF...GEORGETOWN...DEL RIO...SAN MARCOS...
AUSTIN...BASTROP...GIDDINGS...BRACKETTVILLE...UVALDE...HONDO...
SAN ANTONIO...NEW BRAUNFELS...SEGUIN...LOCKHART...LA GRANGE...
EAGLE PASS...CRYSTAL CITY...PEARSALL...PLEASANTON...FLORESVILLE...
KARNES CITY...GONZALES...CUERO...HALLETTSVILLE...CARRIZO SPRINGS
302 PM CDT FRI JUL 10 2009
...HEAT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT SATURDAY...
ANOTHER HOT DAY IS FORECAST SATURDAY WITH HIGHS OF 101 TO 105.
HEAT INDEX VALUES WILL RANGE BETWEEN 105 AND 110 DURING THE
AFTERNOON AND EARLY EVENING HOURS TOMORROW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A HEAT ADVISORY MEANS VERY HIGH TEMPERATURES AND HUMIDITY WILL
CREATE CONDITIONS THAT MAY CAUSE HEAT EXHAUSTION OR HEAT STROKE.
DRINK PLENTY NON-ALCOHOLIC FLUIDS...STAY IN AIR CONDITIONED
BUILDINGS...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND
NEIGHBORS.
$$
(from
http://www.weather.gov/alerts/tx.html#TXZ173.EWXNPWEWX.200200)
Hope this helps...
Best regards,
Ken