Alert archive / Alabama / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 76, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Jul 1, 2007, 2:21 PM CDT for Cullman County, Alabama. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 1, 2007, 2:21 PM CDT (19:21 UTC)
- Expired
- Jul 1, 2007, 3:00 PM CDT
- In force
- 39 min
- Issued by
- NWS Huntsville, AL
- Area
- Counties, with a storm outline in the text
County Cullman County, AL
The radar
The Birmingham radar (KBMX), 107 km from the middle of the area, began a volume at 19:24 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 1, 12:10 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 7.4 hours before the alert went out and 106 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
- 851 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 1313 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 1, 1:20 PM CDT, 1 hour 1 minute earlier.
Area forecast discussion, Jul 1, 1:20 PM CDT, 1 hour 1 minute before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HUNTSVILLE AL 120 PM CDT SUN JUL 1 2007 .DISCUSSION... CONVECTION CONTINUING TO FOCUS ALONG A WEAK FRONTAL BOUNDARY DRAPED ACROSS TN AND RESIDUAL OUTFLOW BOUNDARIES FROM AN OVERNIGHT MCS ACROSS WEST TN. SUFFICIENT INSTABILITY/MOISTURE EXISTS FOR THIS CONVECTION TO CONTINUE EXPANDING EWRD ACROSS THE AREA THROUGH PEAK HEATING. DEVELOPMENT THUS FAR CARRYING A BIT MORE EWRD MOVEMENT THAN IN RECENT DAYS...AND THE STEEP LAPSE RATES WILL CONTINUE TO SUPPORT STRONG UPDRAFTS AND A RISK OF ISLTD MICROBURSTS/WIND DAMAGE INTO THE EVNG. CURRENTLY PLANNING A LOW END SCTD POP FOR THE EVNG HOURS...UNLESS LAST MINUTE RADAR TRENDS DICTATE OTHERWISE. PCPN COVERAGE WILL DIMINISH FOLLOWING SUNSET... ALTHOUGH WITH THE SFC BOUNDARY STILL IN THE VICINITY...WOULD NOT RULE OUT AN ISLTD STORM OR TWO LINGERING WELL PAST MIDNIGHT. THE AFOREMENTIONED WEAK FRONTAL BOUNDARY WILL CONTINUE TO SLOWLY SAG SOUTHWARD AND ACROSS THE HUN CWFA BY MONDAY. WHILE SLIGHTLY DRIER AIR (MID 60S DEWPTS) MAY FILTER IN THROUGH THE DAY...ENOUGH CONDITIONAL INSTABILITY WILL STILL EXIST FOR POTENTIAL DIURNAL CONVECTIVE DEVELOPMENT WITH THE ASSISTANCE OF ANY LINGERING MESOSCALE/OUTFLOW BOUNDARIES. BOTH THE 12Z NAM AND GFS SUGGEST SOME TYPE OF WEAK CONVERGENCE ZONE/INVERTED TROUGH MOVING FROM EAST TO WEST THROUGH DURING PEAK HEATING...WITH THE NAM MORE ROBUST IN DEVELOPING SCTD CONVECTION ALONG THIS BOUNDARY. WITH DEEPER MOISTURE FOCUSED TOWARD THE SOUTH...BETTER PCPN CHANCES WILL CONSEQUENTLY LIE SOUTH OF THE TN RIVER...AND WILL TAPER POPS ACCORDINGLY FROM SOUTH TO NORTH. THERMAL PROFILE NOT NEARLY AS FAVORABLE FOR WET MICROBURSTS AS IN RECENT DAYS WITH THE DEEPER/DRIER NORTHERLY FLOW IN PLACE...BUT A FEW STRONGER WIND GUSTS WILL REMAIN POSSIBLE. ISLTD DIURNAL CONVECTION WILL REMAIN A POSSIBILITY THROUGH MID-WEEK...AS A WEAK SHEAR AXIS/CONVERGENCE ZONE LINGERS NEAR THE AREA. DAYTIME TEMPERATURES WILL CONTINUE TO RUN SEVERAL DEGREES ABOVE GUIDANCE...WITH HIGHS GENERALLY IN THE LWR/MID 90S THROUGH THE PERIOD. BY THE END OF THE WEEK...GFS SUGGESTING ANOTHER POTENTIAL FRONTAL PASSAGE...BUT GIVEN THE TIME OF YEAR WILL REMAIN SKEPTICAL...AND JUST MAINTAIN 20/30 PERCENT POPS TO COVER THE TYPICAL DIURNAL ACTIVITY THAT WILL ACCOMPANY A PREDOMINANT U/L NWERLY FLOW CONTAINING EMBEDDED SHORTWAVES. DAYTIME TEMPERATURES WILL CONTINUE ABOVE NORMAL...WITH OVERNIGHT LOWS SEASONABLE...INTO NEXT WEEKEND. && .PRELIMINARY POINT TEMPS/POPS... HUNTSVILLE 70 92 68 91 / 30 20 10 20 SHOALS 70 93 68 92 / 30 20 10 20 CULLMAN 70 90 68 89 / 30 30 10 20 FAYETTEVILLE 68 91 66 90 / 30 20 10 20 ALBERTVILLE 69 90 66 89 / 30 30 10 20 FORT PAYNE 68 91 65 89 / 30 30 10 20 && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && 10
Hazardous weather outlook, Jul 1, 12:52 PM CDT, 1 hour 29 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HUNTSVILLE AL 1252 PM CDT SUN JUL 1 2007 ALZ001>010-016-TNZ076-096-097-020300- LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN- MARSHALL-JACKSON-DE KALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN- 1252 PM CDT SUN JUL 1 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF SOUTHERN MIDDLE TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT... SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN THIS AFTERNOON AND PERSIST WELL INTO THE EVENING HOURS. LIKE PREVIOUS DAYS...SEVERAL STRONG TO SEVERE THUNDERSTORMS CAN BE EXPECTED...WITH THE PRIMARY THREAT FROM THESE STORMS BEING GUSTY OR DAMAGING STRAIGHT LINE WINDS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. TYPICAL ISOLATED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL REMAIN IN THE FORECAST FOR MUCH OF THE UPCOMING WORK WEEK. A STRONGER THUNDERSTORM CAPABLE OF PRODUCING GUSTY WINDS CANNOT BE RULED OUT ON ANY OF THESE DAYS...BUT WIDESPREAD STRONG TO SEVERE STORMS ARE NOT ANTICIPATED. .SPOTTER CALL TO ACTION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS NOT ANTICIPATED AT THIS TIME.
In the hours before
Special weather statement, Jul 1, 1:28 PM CDT, 53 minutes before
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</html>Special weather statement, Jul 1, 1:42 PM CDT, 39 minutes before
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</html>Special weather statement, Jul 1, 1:50 PM CDT, 31 minutes before
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</html>Special weather statement, Jul 1, 2:06 PM CDT, 15 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 12:14 PM CDT | Severe Thunderstorm Warning | HUN | Lawrence | 31 min |
| Jul 1, 12:44 PM CDT | Severe Thunderstorm Warning | HUN | Lawrence | 31 min |
| Jul 1, 12:46 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 29 min |
| Jul 1, 1:22 PM CDT | Severe Thunderstorm Warning | HUN | Limestone | 23 min |
| Jul 1, 1:26 PM CDT | Severe Thunderstorm Warning | HUN | Lawrence, Morgan | 34 min |
| Jul 1, 1:33 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 27 min |
| Jul 1, 1:40 PM CDT | Severe Thunderstorm Warning | HUN | Limestone, Morgan | 35 min |
| Jul 1, 2:00 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 30 min |
| Jul 1, 2:34 PM CDT | Severe Thunderstorm Warning | HUN | Marshall | 26 min |
| Jul 1, 2:44 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 31 min |
| Jul 1, 3:18 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb | 27 min |
| Jul 1, 4:29 PM CDT | Flash Flood Warning | HUN | DeKalb | 61 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2007Every severe thunderstorm warning in 2007
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.