Alert archive / Alabama / Special Weather Statements in 2011
Special Weather Statement, NWS Birmingham, AL
NWS Birmingham, AL issued this special weather statement at Jul 7, 2011, 4:45 PM CDT for Bibb County, Alabama. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 7, 2011, 4:45 PM CDT (21:45 UTC)
- Expired
- Jul 7, 2011, 5:30 PM CDT
- In force
- 45 min
- Issued by
- NWS Birmingham, AL
County Bibb County, AL
The radar
The Birmingham radar (KBMX), 41 km from the middle of the area, began a volume at 21:45 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.8 hours before the alert went out and 253 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
- 1144 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 877 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Jul 7, 3:01 PM CDT, 1 hour 44 minutes earlier.
Area forecast discussion, Jul 7, 3:01 PM CDT, 1 hour 44 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BIRMINGHAM AL 301 PM CDT THU JUL 7 2011 .DISCUSSION... SCATTERED MOSTLY SMALL...BUT RAINFALL RICH SHOWERS AND THUNDERSTORMS THIS AFTERNOON. HIGH PWS LEADING TO SOME HEAVY DOWNPOURS IN THE AREAS THAT RECEIVE RAINFALL. LOOKING OVER THE SATELLITE IMAGERY...CENTRAL ALABAMA IS BETWEEN AN APPROACHING SHORTWAVE NEAR MISSOURI AND AN UPPER LOW IN THE NORTHERN GULF. PLENTY OF MOISTURE FEEDING NORTHWARD OUT OF THE GULF WHICH SHOULD KEEP US IN A FAVORABLE PATTERN FOR SCATTERED SHOWERS AND THUNDERSTORMS THROUGH FRIDAY AND PERHAPS SATURDAY AS THE PREVIOUSLY MENTIONED SHORTWAVE ROTATES THROUGH THE SOUTHEASTERN STATES. THAT SAID...MOST OF THE 12Z MODELS HAVE COME IN A BIT DRIER FOR FRIDAY AS THE TENDENCY WAS TO TAKE MOST OF THE UPPER SUPPORT THROUGH THE OHIO AND UPPER TENNESSEE VALLEYS. FIND IT DIFFICULT TO BELIEVE THE AREA WILL BE COMPLETELY LEFT OUT OF THE SHOWER ACTIVITY SO WILL MAINTAIN AT LEAST A MEDIUM CHANCE POP FOR TOMORROW. WHAT HAPPENS THEREAFTER HAS BECOME SOMEWHAT MUDDLED AS THE MODELS DISAGREE ON THE STRENGTH OF AN UPPER LEVEL RIDGE THAT WILL BUILD EASTWARD FROM TEXAS AND OVER THE AREA. THE NAM...SREF...THE OPERATIONAL GFS SHOW PLENTY OF HOLES IN THE RIDGE WITH THE OPPORTUNITY FOR CONTINUED AFTERNOON SHOWERS AND THUNDERSTORMS. THE EURO...UKMET AND CMC ARE MORE SUPPRESSIVE WITH THE RIDGE AND TEND TO ALL BUT ELIMINATE RAINFALL FOR THE NORTHERN TWO-THIRDS OF THE STATE NEXT WEEK. THE GEFS HAS A LEAN TOWARDS THE EURO BUT IS SOMEWHAT IN THE MIDDLE OF THE TWO GROUPS. THE DIFFERENCE BETWEEN THE MODEL GROUPS APPEARS TO HINGE ON THE DEVELOPMENT OF A MORE SIGNIFICANT TROUGH ALONG THE PACIFIC COAST. IF THIS WERE TO HAPPEN THEN TEMPERATURES COULD REALLY PUSH 100 DEGREES THROUGH MUCH OF NEXT WEEK FOR MANY AREAS. FOR NOW...WILL FOLLOW MUCH OF THE GFS ENSEMBLE MEAN AVERAGES BUT AM A LITTLE WORRIED ABOUT THE POTENTIAL FOR EXCESSIVE HEAT PROBLEMS DOWN THE ROAD. && .AVIATION...18Z TAF DISCUSSION. LIGHT SHOWER ACTIVITY POPPING UP ACROSS CENTRAL ALABAMA DUE TO DIURNAL HEATING EFFECTS. MORE WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY WILL BE ACROSS NORTHERN PORTIONS OF MS/AL INTO TN... CLOSER TO AN UPPER SHORTWAVE MOVING ACROSS. HOWEVER...WE HAVE JUST ENOUGH INSTABILITY WITH PLENTY OF HEAT TO REACH OUR CONVECTIVE TEMPERATURE ACROSS MUCH OF THE STATE AS WE HAD PLENTY OF SUNSHINE THIS MORNING. THIS ACTIVITY SHOULD REMAIN UNDER THE WEAK TO MODERATE TSRA ACTIVITY FOR THIS AFTERNOON ACROSS CENTRAL ALABAMA TAFS INTO THE EARLY EVENING. NO TEMPO/S AS PINPOINTING EXACT LOCALES WILL BE DIFFICULT AT BEST. BUT TOWERING CUMULUS AND SOME CB/S DEFINITELY SCATTERED ABOUT. WINDS ARE FAIRLY LIGHT BUT SHOULD TAPER DOWN MORE AFTER SUNSET WITH ONLY MINOR FOG POSSIBLE ACROSS A COUPLE OF NORTHERN SITES...ALL IN ALL VERY TYPICAL SUMMERTIME WEATHER. NOTICE...KEET TAF WILL HAVE (AMD LTD TO VIS WIND AND WX) AMENDED TO THE END OF THE FORECAST UNTIL FURTHER NOTICE. THE CEILOMETER DATA WILL BE GOING THROUGH NUMEROUS TESTS AND MONITORED FOR ACCURACY. && .PRELIMINARY POINT TEMPS/POPS... GADSDEN 67 90 70 93 69 / 30 60 40 20 10 ANNISTON 71 91 72 93 74 / 20 50 40 20 10 BIRMINGHAM 73 91 73 94 74 / 20 60 40 20 10 TUSCALOOSA 72 92 73 94 73 / 20 50 40 20 10 CALERA 71 91 73 94 74 / 20 50 40 20 10 AUBURN 71 93 72 94 73 / 20 40 40 20 20 MONTGOMERY 73 93 74 94 75 / 20 40 40 30 20 TROY 70 93 72 94 73 / 20 40 40 40 20 && .BMX WATCHES/WARNINGS/ADVISORIES... NONE. && 88/08
Hazardous weather outlook, Jul 7, 1:20 PM CDT, 3 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BIRMINGHAM AL 120 PM CDT THU JUL 7 2011 ALZ011>015-017>050-081115- MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN- CHEROKEE-CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR- TALLADEGA-CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON- COOSA-TALLAPOOSA-CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE- MONTGOMERY-MACON-BULLOCK-LEE-RUSSELL-PIKE-BARBOUR- 120 PM CDT THU JUL 7 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. STRONG HIGH PRESSURE WILL MOVE IN PLACE ACROSS CENTRAL ALABAMA NEXT WEEK. AS A RESULT...TEMPERATURES IN THE UPPER 90S TO LOWER 100S ACROSS MOST LOCATIONS ARE POSSIBLE. WHEN FACTORING RELATIVE HUMIDITY...HEAT INDEX VALUES COULD RANGE BETWEEN 105 AND 110 DEGREES DURING THE AFTERNOON. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT EXPECTED AT THIS TIME. 08/MNK
In the hours before
Special weather statement, Jul 7, 4:28 PM CDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
428 PM CDT THU JUL 7 2011
ALZ015-072215-
WALKER AL-
428 PM CDT THU JUL 7 2011
...SIGNIFICANT WEATHER ADVISORY FOR WALKER COUNTY UNTIL 515 PM CDT...
AT 424 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR JASPER...MOVING EAST SOUTHEAST AT 10 MPH.
WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.
LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
JASPER...
CORDOVA...
DORA...
PARRISH...
GORGAS...
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
&&
LAT...LON 3395 8710 3390 8708 3389 8704 3366 8707
3366 8709 3363 8709 3362 8717 3359 8720
3355 8719 3356 8732 3359 8732 3360 8742
3369 8743 3370 8749 3394 8741
TIME...MOT...LOC 2128Z 273DEG 8KT 3384 8731
56Special weather statement, Jul 7, 4:45 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
445 PM CDT THU JUL 7 2011
ALZ034-072230-
BIBB AL-
445 PM CDT THU JUL 7 2011
...SIGNIFICANT WEATHER ADVISORY FOR BIBB COUNTY UNTIL 530 PM CDT...
AT 442 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR EOLINE...OR 8 MILES NORTHWEST OF BRENT...MOVING
NORTHEAST AT 10 MPH.
PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.
LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
BRENT...
CENTREVILLE...
EOLINE...
WEST CENTREVILLE...
WEST BLOCTON...
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
&&
LAT...LON 3301 8732 3309 8731 3312 8729 3314 8728
3313 8720 3319 8720 3324 8714 3322 8711
3325 8707 3291 8687 3285 8688 3284 8731
3300 8740
TIME...MOT...LOC 2145Z 243DEG 9KT 3299 8728
56The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 4:28 PM CDT | Special Weather Statement | BMX | Walker | 47 min |
| Jul 7, 5:04 PM CDT | Special Weather Statement | BMX | Jefferson | 41 min |
| Jul 7, 5:59 PM CDT | Areal Flood Advisory | BMX | Jefferson | 2 hr |
| Jul 7, 6:15 PM CDT | Special Weather Statement | BMX | Dallas | 45 min |
Nearby
Special Weather Statements in Alabama, 2011Every special weather statement 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.