Alert archive / Alabama / Special Weather Statements in 2011
Special Weather Statement, NWS Birmingham, AL
NWS Birmingham, AL issued this special weather statement at Jul 31, 2011, 2:02 PM CDT for Dallas County, Alabama. It was in force for 43 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 31, 2011, 2:02 PM CDT (19:02 UTC)
- Expired
- Jul 31, 2011, 2:45 PM CDT
- In force
- 43 min
- Issued by
- NWS Birmingham, AL
County Dallas County, AL
The radar
The Birmingham radar (KBMX), 87 km from the middle of the area, began a volume at 19:05 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
Birmingham, AL (KBMX), launched 12:00Z, 7.0 hours before the alert went out and 87 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
- 2227 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 826 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</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 31, 12:34 PM CDT, 1 hour 28 minutes earlier.
Area forecast discussion, Jul 31, 12:34 PM CDT, 1 hour 28 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BIRMINGHAM AL 1234 PM CDT SUN JUL 31 2011 .UPDATE... FOR 18Z AVIATION. && .DISCUSSION... SHOWERS ARE BEGINNING TO DEVELOP THIS MORNING OFF OF THE OUTFLOW FROM THE STORMS IN MS AND ALONG A WEAK TROUGH OVER SOUTH CENTRAL ALABAMA. WITH AMPLE MOISTURE AND INSTABILITY INTERACTING WITH THE MENTIONED BOUNDARY... EXPECT TO SEE SHOWERS AND THUNDERSTORMS ACROSS THE SOUTHERN PORTION OF THE CWA. ADJUSTED TO POPS TO REFLECT THIS. UPDATED TEMPERATURES BASED ON HOURLY TRENDS. NO OTHER CHANGES MADE TO THE FORECAST...AS IT SEEMED TO BE ON TRACK. UPDATES ARE OUT. && .AVIATION... 18Z TAF DISCUSSION. SCATTERED TO NUMEROUS SHOWERS DEVELOPING ACROSS THE SOUTHERN HALF OF ALABAMA THIS AFTERNOON NEAR A WEAK BOUNDARY. EXPECT THIS GENERAL TREND TO CONTINUE THROUGH EARLY EVENING WITH MOST OF THE CONVECTION ACROSS THE SOUTH...PERHAPS AN ISOLATED STORM NORTH. OUTSIDE OF THE THUNDERSTORMS PRIMARILY VFR CONDITIONS EXPECTED WITH SOME PATCHY BR POSSIBLE AT MGM AND TOI TOMORROW MORNING. NORTHERLY WINDS LESS THAN 10KTS EXCEPT IN THUNDERSTORMS. && .BMX WATCHES/WARNINGS/ADVISORIES... NONE. && 73/88
Hazardous weather outlook, Jul 31, 6:06 AM CDT, 7 hours 56 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BIRMINGHAM AL 606 AM CDT SUN JUL 31 2011 ALZ011>015-017>050-010100- AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE- CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE- JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY- PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA- TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON- 606 AM CDT SUN JUL 31 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM. .DAY ONE...TONIGHT AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. A DOME OF HIGH PRESSURE WILL EXPAND EASTWARD INTO ALABAMA THIS WEEK. THE COMBINATION OF HIGH TEMPERATURES AND HUMIDITY WILL PRODUCE DANGEROUS HEAT CONDITIONS THROUGHOUT CENTRAL ALABAMA. HEAT INDICES OF 105 TO 110 DEGREES ARE FORECAST FOR MONDAY WITH VALUES CLIMBING TO 108 TO 112 DEGREES TUESDAY THROUGH FRIDAY. HEAT ADVISORIES WILL LIKELY BE ISSUED DURING THE WEEK AND POSSIBLY EXCESSIVE HEAT WARNINGS. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT EXPECTED AT THIS TIME.
In the hours before
Special weather statement, Jul 31, 1:31 PM CDT, 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 131 PM CDT SUN JUL 31 2011 ALZ044-311915- MONTGOMERY AL- 131 PM CDT SUN JUL 31 2011 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MONTGOMERY COUNTY UNTIL 215 PM CDT... AT 131 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG THUNDERSTORM NEAR SNOWDOUN...OR NEAR MONTGOMERY...MOVING SOUTHEAST AT 15 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... PINEDALE... SNOWDOUN... SPRAGUE... BARACHIAS... CARTERS HILL... 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 3220 8603 3207 8633 3233 8642 3240 8629 TIME...MOT...LOC 1831Z 327DEG 13KT 3228 8629 19
Special weather statement, Jul 31, 2:02 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BIRMINGHAM AL 202 PM CDT SUN JUL 31 2011 ALZ040-311945- DALLAS AL- 202 PM CDT SUN JUL 31 2011 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DALLAS COUNTY UNTIL 245 PM CDT... AT 202 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG THUNDERSTORM NEAR VALLEY GRANDE...MOVING SOUTH AT 15 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... SELMA... SELMONT-WEST SELMONT... POTTER STATION... MEMORIAL STADIUM... DALLAS COUNTY HORSE ARENA... 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 3230 8686 3234 8718 3256 8704 3255 8691 TIME...MOT...LOC 1902Z 004DEG 8KT 3246 8699 19
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 1:31 PM CDT | Special Weather Statement | BMX | Montgomery | 44 min |
| Jul 31, 2:21 PM CDT | Severe Thunderstorm Warning | BMX | Dallas | 24 min |
| Jul 31, 2:48 PM CDT | Special Weather Statement | BMX | Chilton | 42 min |
| Jul 31, 2:59 PM CDT | Special Weather Statement | BMX | Tuscaloosa | 31 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.