Alert archive / Texas / Red Flag Warnings in 2011
Red Flag Warning 13, NWS Brownsville, TX
NWS Brownsville, TX issued this red flag warning at Jun 20, 2011, 5:00 AM CDT for 4 counties in Texas. It took effect at Jun 20, 2011, 1:00 PM CDT. It was in force for 8 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 20, 2011, 5:00 AM CDT (10:00 UTC)
- In effect from
- Jun 20, 2011, 1:00 PM CDT
- Expired
- Jun 20, 2011, 9:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS Brownsville, TX
Counties Brooks County, TX, Jim Hogg County, TX, Starr County, TX, Zapata County, TX
The radar
The Corpus Christi radar (KCRP), 153 km from the middle of the area, began a volume at 09:57 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 20, 5:19 PM CDT | WILDFIRE 22000 | 12 Ese Hebbronville, TX |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 10.0 hours before the alert went out and 163 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
- 1745 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 1129 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
221 WWUS84 KBRO 201000 RFWBRO URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE BROWNSVILLE TX 500 AM CDT MON JUN 20 2011 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED ACROSS WESTERN DEEP SOUTH TEXAS... .SEVERAL FACTORS WILL COMBINE TO PRODUCE A FAVORABLE ENVIRONMENT FOR EXPLOSIVE WILDFIRE GROWTH AND SPREAD THIS AFTERNOON AND EARLY EVENING ACROSS PORTIONS OF DEEP SOUTH TEXAS. A TIGHTENING PRESSURE GRADIENT BROUGHT ON BY INTERACTION BETWEEN SURFACE HIGH PRESSURE ACROSS THE GULF OF MEXICO AND LOW PRESSURE IN THE PLAINS WILL PRODUCE MODERATE TO STRONG SOUTH TO SOUTHEAST SURFACE WINDS. COMBINE THAT WITH HOT AIR TEMPERATURES AROUND 100 DEGREES OR HIGHER AND EXCEPTIONALLY DRY FUELS AND LOW RELATIVE HUMIDITIES WILL LEAD TO A POTENTIALLY HAZARDOUS FIRE WEATHER ENVIRONMENT. TXZ248>250-252-201800- /O.UPG.KBRO.FW.A.0010.110620T1800Z-110621T0200Z/ /O.NEW.KBRO.FW.W.0013.110620T1800Z-110621T0200Z/ ZAPATA-JIM HOGG-BROOKS-STARR- 500 AM CDT MON JUN 20 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 248...249...250 AND 252... THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM CDT THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. THE COMBINATION OF SOUTHEAST 20 FOOT WINDS AROUND 25 MPH...AND RELATIVE HUMIDITY VALUES FALLING TO BETWEEN 20 TO 30 PERCENT WILL COMBINE WITH EXTREMELY DRY FUELS TO PRODUCE CRITICAL FIRE DANGER THIS AFTERNOON AND INTO EARLY THIS EVENING ACROSS WESTERN BROOKS...ZAPATA...STARR AND JIM HOGG COUNTIES. THE STRONG SOUTHEASTERLY WINDS WILL BEGIN TO DIMINISH BY AROUND SUNSET THIS EVENING AND THE RELATIVE HUMIDITY VALUES WILL BEGIN A SLOW RECOVERY AFTER SUNSET BUT NOT RECOVER TO ABOVE 70 PERCENT UNTIL AFTER MIDNIGHT TONIGHT. THIS WILL REDUCE THE POTENTIAL FOR FIRE GROWTH THIS EVENING AND TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS CRITICAL FIRE WEATHER CONDITIONS ARE OCCURRING NOW...OR WILL SHORTLY. THESE CONDITIONS INCLUDE SUSTAINED 20 FOOT WINDS OF 25 MPH OR GREATER AND CURED FUELS...OR THE COMBINATION OF RELATIVE HUMIDITY BELOW 35 PERCENT FOR 2 HOURS OR MORE AND SUSTAINED 20 FOOT WINDS OF 25 MPH OR HIGHER WHEN FUELS ARE NOT CURED. THESE CONDITIONS WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
The office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:09 PM CDT | Small Craft Advisory | BRO | 18 hr | |
| Jun 20, 4:29 AM CDT | Small Craft Advisory for Winds | BRO | 15 hr | |
| Jun 20, 1:11 PM CDT | Small Craft Advisory | BRO | 27 hr |
Nearby
Red Flag Warnings in Texas, 2011Every red flag warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.