Alert archive / Texas / Red Flag Warnings in 2008
Red Flag Warning 21, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this red flag warning at Mar 17, 2008, 2:56 PM CDT for 7 counties in Texas. It took effect at Mar 18, 2008, 12:00 PM CDT. It was in force for 7 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
- Mar 17, 2008, 2:56 PM CDT (19:56 UTC)
- In effect from
- Mar 18, 2008, 12:00 PM CDT
- Expired
- Mar 18, 2008, 7:00 PM CDT
- In force
- 7 hr
- Issued by
- NWS Austin/San Antonio, TX
Counties Dimmit County, TX, Frio County, TX, Kinney County, TX, Maverick County, TX, Uvalde County, TX, Val Verde County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 32 km from the middle of the area, began a volume at 20:01 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
Del Rio, TX (KDRT), launched 12:00Z, 7.9 hours before the alert went out and 85 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.
- Mixed-layer CAPE
- 1454 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 693 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 331 m²/s²
- 0-3 km storm-relative helicity
- 339 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS84 KEWX 171956 RFWEWX RED FLAG WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 256 PM CDT MON MAR 17 2008 ...A RED FLAG WARNING HAS BEEN ISSUED FOR WESTERN PORTIONS OF SOUTH CENTRAL TEXAS FOR BREEZY AND DRY WEATHER TUESDAY... .A STRONG STORM SYSTEM WILL PRODUCE STRONG WEST TO NORTHWEST WINDS LATE TUESDAY MORNING THROUGH TUESDAY AFTERNOON. THESE WINDS WILL RESULT IN DRYING CONDITIONS FOR SEVERAL HOURS...WITH AFTERNOON RELATIVE HUMIDITIES FALLING TO NEAR 25 PERCENT OVER THE WATCH AREA. 20-FOOT WINDS WILL INCREASE TO 20 TO 30 MPH AND GUSTY BY MID AFTERNOON. HUMIDITIES WILL REBOUND ABOVE 25 PERCENT BY EVENING BUT NORTHWEST WINDS WILL STILL BE IN THE 15 TO 25 MPH RANGE TIL AROUND 9 PM. THE DRY CONDITIONS WILL CONTINUE FROM TUESDAY AFTERNOON THROUGH WEDNESDAY NIGHT. THE STORM SYSTEM COULD PRODUCE A WETTING RAIN OVER SOME AREAS MONDAY NIGHT INTO EARLY TUESDAY MORNING. HOWEVER...THESE RAINS MAY NOT BE ABLE TO PROVIDE A SIGNIFICANT REDUCTION TO FIRE SPREAD POTENTIAL...SINCE THE ABUNDANT DEAD GRASSES WILL DRY QUICKLY FROM THE PERSISTENT DRY WINDS. TXZ183-202-203-217>219-228-180400- /O.UPG.KEWX.FW.A.0007.080318T1700Z-080319T0000Z/ /O.NEW.KEWX.FW.W.0021.080318T1700Z-080319T0000Z/ VAL VERDE-KINNEY-UVALDE-MAVERICK-ZAVALA-FRIO-DIMMIT- 256 PM CDT MON MAR 17 2008 ...RED FLAG WARNING IN EFFECT FROM 12 PM TO 7 PM CDT TUESDAY... THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 12 PM TO 7 PM CDT TUESDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. EXPECT A SIGNIFICANT CHANCE OF WETTING RAINS ACROSS THE WATCH AREA. HOWEVER...THIS MOISTURE WILL BEGIN TO ERODE LATE TUESDAY MORNING AS STRONG 20-FOOT WINDS OF 20 TO 30 MPH WILL DRY OUT DEAD GRASSES. EXPECT RELATIVE HUMIDITIES TO FALL TO BELOW RED FLAG LEVELS BY AROUND 7 PM BUT WINDS MAY STAY ABOVE CRITERIA TIL AROUND 9 PM. A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. $$
3 follow-up statements
000 WWUS84 KEWX 172013 RFWEWX RED FLAG WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 313 PM CDT MON MAR 17 2008 ...A RED FLAG WARNING HAS BEEN ISSUED FOR WESTERN PORTIONS OF SOUTH CENTRAL TEXAS FOR BREEZY AND DRY WEATHER TUESDAY... .A STRONG STORM SYSTEM WILL PRODUCE STRONG WEST TO NORTHWEST WINDS LATE TUESDAY MORNING THROUGH TUESDAY AFTERNOON. THESE WINDS WILL RESULT IN DRYING CONDITIONS FOR SEVERAL HOURS...WITH AFTERNOON RELATIVE HUMIDITIES FALLING TO NEAR 25 PERCENT OVER THE WATCH AREA. 20-FOOT WINDS WILL INCREASE TO 20 TO 30 MPH AND GUSTY BY MID AFTERNOON. HUMIDITIES WILL REBOUND ABOVE 25 PERCENT BY EVENING BUT NORTHWEST WINDS WILL STILL BE IN THE 15 TO 25 MPH RANGE TIL AROUND 9 PM. THE DRY CONDITIONS WILL CONTINUE FROM TUESDAY AFTERNOON THROUGH WEDNESDAY NIGHT. THE STORM SYSTEM COULD PRODUCE A WETTING RAIN OVER SOME AREAS MONDAY NIGHT INTO EARLY TUESDAY MORNING. HOWEVER...THESE RAINS MAY NOT BE ABLE TO PROVIDE A SIGNIFICANT REDUCTION TO FIRE SPREAD POTENTIAL...SINCE THE ABUNDANT DEAD GRASSES WILL DRY QUICKLY FROM THE PERSISTENT DRY WINDS. TXZ183-202-203-217>219-228-181300- /O.CON.KEWX.FW.W.0021.080318T1700Z-080319T0000Z/ VAL VERDE-KINNEY-UVALDE-MAVERICK-ZAVALA-FRIO-DIMMIT- 313 PM CDT MON MAR 17 2008 ...RED FLAG WARNING REMAINS IN EFFECT FROM 12 PM TO 7 PM CDT TUESDAY... A RED FLAG WARNING REMAINS IN EFFECT FROM 12 PM TO 7 PM CDT TUESDAY. EXPECT A SIGNIFICANT CHANCE OF WETTING RAINS ACROSS THE WATCH AREA. HOWEVER...THIS MOISTURE WILL BEGIN TO ERODE LATE TUESDAY MORNING AS STRONG 20-FOOT WINDS OF 20 TO 30 MPH WILL DRY OUT DEAD GRASSES. EXPECT RELATIVE HUMIDITIES TO FALL TO BELOW RED FLAG LEVELS BY AROUND 7 PM BUT WINDS MAY STAY ABOVE CRITERIA TIL AROUND 9 PM. A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. $$
000 WWUS84 KEWX 180948 RFWEWX RED FLAG WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 448 AM CDT TUE MAR 18 2008 ...A RED FLAG WARNING REMAINS IN EFFECT FOR THE WEST AND SOUTHWEST PORTIONS OF SOUTH CENTRAL TEXAS FOR WINDY AND DRY CONDITIONS TODAY... .A STRONG STORM SYSTEM WILL PRODUCE GUSTY WEST TO NORTHWEST WINDS THIS MORNING INTO THIS AFTERNOON. THESE WINDS WILL RESULT IN DRYING CONDITIONS FOR SEVERAL HOURS...WITH AFTERNOON RELATIVE HUMIDITIES FALLING TO 15 TO 25 PERCENT OVER THE WARNING AREA. 20-FOOT WINDS WILL INCREASE TO 20 TO 30 MPH AND GUSTY BY LATE MORNING. HUMIDITIES WILL REBOUND TO ABOVE 25 PERCENT BY EVENING BUT NORTHWEST WINDS WILL STILL BE IN THE 20 TO 30 MPH RANGE UNTIL AROUND 9 PM. THE DRY CONDITIONS WILL CONTINUE FROM THIS AFTERNOON THROUGH WEDNESDAY NIGHT. THE STORM SYSTEM HAS PRODUCE SOME SIGNIFICANT WETTING RAINS OVER VAL VERDE COUNTY LAST NIGHT. HOWEVER...THESE RAINS MAY NOT BE ABLE TO PROVIDE A SIGNIFICANT REDUCTION TO FIRE SPREAD POTENTIAL...SINCE THE ABUNDANT DEAD GRASSES WILL DRY QUICKLY FROM THE DEVELOPING DRY GUSTY WINDS. TXZ183-202-203-217>219-228-182030- /O.CON.KEWX.FW.W.0021.080318T1700Z-080319T0000Z/ VAL VERDE-KINNEY-UVALDE-MAVERICK-ZAVALA-FRIO-DIMMIT- 448 AM CDT TUE MAR 18 2008 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... EXPECT SPOTTY WETTING RAINS ACROSS THE WARNING AREA THIS MORNING. HOWEVER...THIS MOISTURE WILL BEGIN TO ERODE LATER THIS MORNING AS STRONG 20-FOOT WINDS OF 20 TO 30 MPH WILL DRY OUT DEAD GRASSES. EXPECT RELATIVE HUMIDITIES TO FALL TO BELOW RED FLAG LEVELS BY AROUND 7 PM BUT WINDS MAY STAY ABOVE CRITERIA UNTIL AROUND 9 PM. A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. $$
000 WWUS84 KEWX 182026 RFWEWX RED FLAG WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 326 PM CDT TUE MAR 18 2008 ...A RED FLAG WARNING REMAINS IN EFFECT FOR THE WEST AND SOUTHWEST PORTIONS OF SOUTH CENTRAL TEXAS FOR WINDY AND DRY CONDITIONS TODAY... .A STRONG STORM SYSTEM WILL PRODUCE GUSTY WEST TO NORTHWEST WINDS THROUGH THIS AFTERNOON AND TONIGHT. THESE WINDS WILL RESULT IN DRYING CONDITIONS FOR SEVERAL HOURS...WITH AFTERNOON RELATIVE HUMIDITIES FALLING TO 15 TO 25 PERCENT OVER THE WARNING AREA. HUMIDITIES WILL REBOUND TO ABOVE 25 PERCENT BY EVENING BUT NORTHWEST WINDS WILL STILL BE IN THE 20 TO 30 MPH RANGE INTO THE OVERNIGHT HOURS. DESPITE THE WETTING RAINS OVER VAL VERDE COUNTY LAST NIGHT...THESE RAINS WERE NOT ENOUGH TO PROVIDE A SIGNIFICANT REDUCTION TO FIRE SPREAD POTENTIAL...SINCE THE ABUNDANT DEAD GRASSES WILL DRY QUICKLY FROM THE DRY GUSTY WINDS. TXZ183-202-203-217>219-228-190000- /O.CON.KEWX.FW.W.0021.000000T0000Z-080319T0000Z/ VAL VERDE-KINNEY-UVALDE-MAVERICK-ZAVALA-FRIO-DIMMIT- 326 PM CDT TUE MAR 18 2008 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 3:37 AM CDT | Flash Flood Watch | EWX | Bastrop, Blanco, Burnet, Caldwell, Fayette, Gillespie and 5 more | 33 hr |
| Mar 17, 3:47 AM CDT | Wind Advisory | EWX | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more | 12 hr |
| Mar 17, 6:34 AM CDT | Fire Weather Watch | EWX | Dimmit, Frio, Kinney, Maverick, Uvalde, Val Verde and 1 more | 8 hr |
| Mar 17, 6:31 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 29 min |
| Mar 17, 6:42 PM CDT | Severe Thunderstorm Warning | EWX | Bandera | 33 min |
Nearby
Red Flag Warnings in Texas, 2008Every red flag warning in 2008
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.