Alert archive / Alabama / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 41, NWS Huntsville, AL

May 24, 2010Jackson County, Madison County, Marshall County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 24, 2010, 6:45 PM CDT for Jackson County, Madison County, Marshall County, Alabama. It was in force for 32 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
May 24, 2010, 6:45 PM CDT (23:45 UTC)
Expired
May 24, 2010, 7:17 PM CDT
In force
32 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

Counties Jackson County, AL, Madison County, AL, Marshall County, AL

The radar

The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 23:47 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.8 hours before the alert went out and 217 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2010-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 837 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2010-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
837 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
892 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

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 May 24, 6:15 PM CDT, 30 minutes earlier.

Area forecast discussion, May 24, 6:15 PM CDT, 30 minutes before
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Hazardous weather outlook, May 24, 1:07 PM CDT, 5 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
107 PM CDT MON MAY 24 2010

ALZ001>010-016-TNZ076-096-097-250400-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
107 PM CDT MON MAY 24 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS
OF SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

ISOLATED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING
MAINLY ACROSS LOCATIONS WEST OF INTERSTATE 65. SOME STORMS MAY
BE CAPABLE OF PRODUCING BRIEF HEAVY RAINFALL...HAIL...AND GUSTY
WINDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE
POSSIBLE THROUGH MUCH OF THE WORK WEEK AS A SERIES OF UPPER LEVEL
DISTURBANCES MOVE ACROSS THE REGION. SOME OF THESE STORMS MAY
PRODUCE GUSTY WINDS...HAIL...AND LOCALLY HEAVY RAINFALL.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL
IS NOT ANTICIPATED AT THIS TIME.

KNS

In the hours before

Special weather statement, May 24, 2:23 PM CDT, 4 hours 22 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
223 PM CDT MON MAY 24 2010

ALZ001-002-242030-
COLBERT-LAUDERDALE-
223 PM CDT MON MAY 24 2010

...SIGNIFICANT WEATHER ADVISORY FOR COLBERT AND LAUDERDALE COUNTIES
UNTIL 330 PM CDT...

AT 220 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM COLLINWOOD TO ZIP
CITY TO FORD CITY...MOVING SOUTHWEST AT 10 MPH.

PENNY SIZE HAIL...WINDS UP TO 45 MPH...AND FREQUENT CLOUD TO GROUND
LIGHTNING ARE EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  UNDERWOOD-PETERSVILLE.
  FLORENCE.
  MUSCLE SHOALS.
  CLOVERDALE.
  SHEFFIELD.
  THREET...TUSCUMBIA.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

&&

LAT...LON 3502 8763 3501 8759 3500 8758 3476 8747
      3457 8783 3476 8799 3502 8811 3502 8810
TIME...MOT...LOC 1923Z 052DEG 7KT 3513 8778 3494 8767
          3479 8760

KNS
Local storm report, May 24, 3:35 PM CDT, 3 hours 10 minutes before
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Special weather statement, May 24, 3:51 PM CDT, 2 hours 54 minutes before
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Special weather statement, May 24, 4:18 PM CDT, 2 hours 27 minutes before
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Local storm report, May 24, 5:02 PM CDT, 1 hour 43 minutes before
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Special weather statement, May 24, 5:08 PM CDT, 1 hour 37 minutes before
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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 24, 2:23 PM CDTSpecial Weather StatementHUNColbert, Lauderdale67 min
May 24, 3:04 PM CDTSevere Thunderstorm WarningHUNColbert, Lauderdale41 min
May 24, 3:45 PM CDTSevere Thunderstorm WarningHUNColbert, Franklin17 min
May 24, 3:51 PM CDTSpecial Weather StatementHUNLawrence39 min
May 24, 4:18 PM CDTSpecial Weather StatementHUNColbert42 min
May 24, 5:08 PM CDTSpecial Weather StatementHUNColbert52 min
May 24, 5:15 PM CDTFlash Flood WarningHUNColbert, Lauderdale2 hr
May 24, 5:56 PM CDTSevere Thunderstorm WarningHUNJackson49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2010Every severe thunderstorm warning in 2010

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.