Alert archive / Texas / Heat Advisories in 2012
Heat Advisory 2, NWS Fort Worth, TX
NWS Fort Worth, TX issued this heat advisory at Jul 27, 2012, 3:46 PM CDT for 44 counties in Texas. It took effect at Jul 28, 2012, 7:00 AM CDT. It was in force for 10 days.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2012, 3:46 PM CDT (20:46 UTC)
- In effect from
- Jul 28, 2012, 7:00 AM CDT
- Expired
- Aug 6, 2012, 7:55 PM CDT
- In force
- 10 days
- Issued by
- NWS Fort Worth, TX
All 44 counties
Anderson County, TX, Bell County, TX, Bosque County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Freestone County, TX, Grayson County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX, Young County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 28 km from the middle of the area, began a volume at 20:47 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
Fort Worth, TX (KFWD), launched 12:00Z, 8.8 hours before the alert went out and 48 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
- 1680 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1146 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Fort Worth, TX wrote its last area forecast discussion before this heat advisory went out at Jul 27, 3:37 PM CDT, 9 minutes earlier.
Area forecast discussion, Jul 27, 3:37 PM CDT, 9 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FORT WORTH TX 337 PM CDT FRI JUL 27 2012 .DISCUSSION... A SHEAR AXIS WILL REMAIN IN PLACE FROM SOUTHWEST TEXAS TO THE LOWER MISSISSIPPI VALLEY THIS EVENING. ALTHOUGH LARGE SCALE FORCING ASSOCIATED WITH THIS FEATURE WILL BE WEAK...THE ATMOSPHERE WILL REMAIN UNSTABLE AND VIRTUALLY UNCAPPED LATE THIS AFTERNOON. THEREFORE...EXPECT DIURNALLY DRIVEN ISOLATED THUNDERSTORMS THROUGH SUNSET. ANY STORM THAT DOES DEVELOP WILL HAVE A POTENTIAL TO PRODUCE DAMAGING DOWNBURST WINDS. THUNDERSTORM CHANCES WILL BE ON THE DECREASE THE REMAINDER OF THE WEEKEND THROUGH NEXT WEEK AS LARGE SCALE SUBSIDENCE INCREASE WITH BUILDING UPPER LEVEL HIGH PRESSURE. ALTHOUGH AN ISOLATED STORM CANNOT BE RULED OUT ANY AFTERNOON FOR THE NEXT FEW DAYS...COVERAGE WILL BE MUCH TOO LIMITED TO INCLUDE ANY MORE THAN A 10 PERCENT POP. THE BUILDING HIGH PRESSURE WILL ALSO BRING WARMER TEMPERATURES TO NORTH TEXAS THE NEXT SEVERAL DAYS WITH AFTERNOON HIGHS AT OR JUST ABOVE 100 DEGREES. MIXING OF DRY AIR SHOULD KEEP HEAT INDEX VALUES THE NEXT FEW AFTERNOONS CLOSE TO THE ACTUAL TEMPERATURE. HOWEVER...THE URBAN HEAT ISLAND AROUND THE METROPLEX SHOULD KEEP TEMPERATURES JUST A FEW DEGREES WARMER AND HEAT INDEX CRITERIA SHOULD BE MET. FOR NOW...WE WILL ISSUE A HEAT ADVISORY FOR TARRANT AND DALLAS COUNTY FOR SATURDAY AND SUNDAY. IT IS POSSIBLE THAT THE HEAT ADVISORY MAY NEED TO BE EXTENDED AND OR EXPANDED EARLY NEXT WEEK IF LOW LEVEL MOISTURE INCREASES AS ADVERTISED BY THE GFS. THE UPPER PATTERN SHOWS VERY LITTLE CHANGE THROUGH THE FIRST WEEK OF AUGUST SO HOT AND RAIN-FREE WEATHER WILL LIKELY CONTINUE. 79 && .PRELIMINARY POINT TEMPS/POPS... DALLAS-FT. WORTH, TX 78 99 79 102 80 / 10 5 0 0 0 WACO, TX 77 101 76 101 79 / 10 5 0 0 0 PARIS, TX 75 99 75 99 76 / 20 5 0 5 0 DENTON, TX 76 101 76 102 78 / 20 5 0 0 0 MCKINNEY, TX 74 99 76 101 76 / 20 5 0 0 0 DALLAS, TX 80 100 81 101 82 / 10 5 0 0 0 TERRELL, TX 76 99 76 100 77 / 10 5 0 0 0 CORSICANA, TX 75 99 76 99 77 / 10 5 0 0 0 TEMPLE, TX 75 99 75 100 76 / 10 5 0 0 0 MINERAL WELLS, TX 76 101 77 102 77 / 10 5 0 0 0 && .FWD WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY FROM 7 AM SATURDAY TO 8 PM CDT SUNDAY FOR TXZ118- 119. && 75/79
Hazardous weather outlook, Jul 27, 3:38 PM CDT, 8 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE FORT WORTH TX 338 PM CDT FRI JUL 27 2012 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-281300- MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN- HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS- ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL- JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO- FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE- LEON-MILAM-ROBERTSON- 338 PM CDT FRI JUL 27 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS ALL OF NORTH TEXAS THIS AFTERNOON...AND GENERALLY NORTH OF A LINE FROM GUNSIGHT IN SOUTHERN STEPHENS COUNTY TO COMO IN SOUTHERN HOPKINS COUNTY THIS EVENING. THE STRONGER THUNDERSTORMS WILL BE CAPABLE OF DAMAGING OUTFLOW WINDS AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. A HEAT ADVISORY IS IN AFFECT FOR THE DALLAS AND TARRANT COUNTIES SATURDAY THROUGH SUNDAY FOR EXCESSIVE HEAT. .SPOTTER INFORMATION STATEMENT... VERY LIMITED SPOTTER ACTIVATION MAY BE REQUESTED THIS AFTERNOON THROUGH EARLY EVENING.
In the hours before
Local storm report, Jul 27, 2:23 PM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
223 PM CDT FRI JUL 27 2012
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM LIGHTNING 2 NE BOWIE 33.59N 97.83W
07/26/2012 MONTAGUE TX AWOS
THE AUTOMATED WEATHER STATION NEAR BOWIE (K0F2) WAS
STRUCK BY LIGHTNING AND DAMAGED.The office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 7:15 PM CDT | Special Weather Statement | FWD | Stephens | 30 min |
| Jul 26, 7:23 PM CDT | Special Weather Statement | FWD | Lamar | 22 min |
| Jul 26, 7:39 PM CDT | Severe Thunderstorm Warning | FWD | Lamar | 51 min |
| Jul 27, 4:00 PM CDT | Special Weather Statement | FWD | Montague | 30 min |
| Jul 27, 4:15 PM CDT | Special Weather Statement | FWD | Fannin | 30 min |
| Jul 27, 4:28 PM CDT | Severe Thunderstorm Warning | FWD | Fannin, Grayson | 24 min |
| Jul 27, 5:17 PM CDT | Special Weather Statement | FWD | Grayson | 28 min |
| Jul 27, 5:46 PM CDT | Special Weather Statement | FWD | Grayson | 59 min |
Nearby
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.