Alert archive / Texas / Red Flag Warnings in 2011
Red Flag Warning 8, NWS Brownsville, TX
NWS Brownsville, TX issued this red flag warning at May 3, 2011, 1:51 PM CDT for 5 counties in Texas. It took effect at May 3, 2011, 2:00 PM CDT. It was in force for 4 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
- May 3, 2011, 1:51 PM CDT (18:51 UTC)
- In effect from
- May 3, 2011, 2:00 PM CDT
- Expired
- May 3, 2011, 6:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS Brownsville, TX
Counties Brooks County, TX, Hidalgo 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 18:50 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 156 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 736 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
631 WWUS84 KBRO 031851 RFWBRO URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE BROWNSVILLE TX 151 PM CDT TUE MAY 3 2011 ...RAPIDLY LOWERING RELATIVE HUMIDITY AND BRISK WINDS THE REMAINDER OF THE AFTERNOON... .DEW POINTS CONTINUE TO LOWER AND RELATIVE HUMIDITY IS CRASHING AS VERY DRY AIR ALOFT MIXES TO THE SURFACE THIS AFTERNOON. HIGH PRESSURE REMAIN NORTH OF DEEP SOUTH TEXAS IS MAINTAINING A MODERATELY STRONG PRESSURE GRADIENT ALLOWING WINDS TO INCREASE DURING THE AFTERNOON HEATING. THE COMBINATION OF THE BRISK WINDS AND LOW HUMIDITY IS PRODUCING HIGH TO NEAR CRITICAL FIRE DANGER CONDITIONS ALONG AND WEST OF HIGHWAY 281. TXZ248>250-252-253-032300- /O.NEW.KBRO.FW.W.0008.110503T1900Z-110503T2300Z/ ZAPATA-JIM HOGG-BROOKS-STARR-HIDALGO- 151 PM CDT TUE MAY 3 2011 ...RED FLAG WARNING IN EFFECT UNTIL 6 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 248...249... 250...252 AND 253... THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 6 PM CDT THIS EVENING. RELATIVE HUMIDITY BETWEEN 10 AND 25 PERCENT AND NORTH WINDS OF 15 TO 20 MPH WITH GUSTS TO 25 MPH WILL COMBINE WITH EXTREMELY DRY FUELS TO PRODUCE HIGH TO NEAR CRITICAL FIRE DANGER THE REST OF THE AFTERNOON. 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 |
|---|---|---|---|---|
| May 3, 2:23 AM CDT | Small Craft Advisory for Winds | BRO | 8 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.