Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 238, NWS Huntsville, AL

July 4, 2011Lincoln County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at Jul 4, 2011, 2:56 PM CDT for Lincoln County, Tennessee. It was in force for 34 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 4, 2011, 2:56 PM CDT (19:56 UTC)
Expired
Jul 4, 2011, 3:30 PM CDT
In force
34 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

County Lincoln County, TN

The radar

The Northeast Alabama radar (KHTX), 52 km from the middle of the area, began a volume at 19:59 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.9 hours before the alert went out and 110 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, Nashville Metro, TN at 12:00Z on 2011-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2292 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, Nashville Metro, TN at 12:00Z on 2011-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.1939Sfc1 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
2292 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
889 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jul 4, 12:38 PM CDT, 2 hours 18 minutes earlier.

Area forecast discussion, Jul 4, 12:38 PM CDT, 2 hours 18 minutes before
<!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>
Hazardous weather outlook, Jul 4, 1:06 PM CDT, 1 hour 50 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
106 PM CDT MON JUL 4 2011

ALZ001>010-016-TNZ076-096-097-050300-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
106 PM CDT MON JUL 4 2011

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

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

THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND INTENSITY AS
THE AFTERNOON PROGRESSES. THUNDERSTORMS DEVELOPING ALONG AN OUTFLOW
BOUNDARY WILL CONTINUE TO MOVE EASTWARD INTO PORTIONS OF NORTHWEST
ALABAMA AROUND 3 TO 4 PM. THESE STORMS WILL THEN AFFECT NORTH CENTRAL
PORTIONS OF THE AREA MAINLY AFTER 4 PM. ISOLATED TO SCATTERED
THUNDERSTORMS WILL ALSO DEVELOP ELSEWHERE THIS AFTERNOON DUE TO
DAYTIME HEATING...PARTICULARLY OVER THE HIGHER TERRAIN. SEVERE
THUNDERSTORMS ARE A POSSIBILITY THIS AFTERNOON...WITH DAMAGING WIND
GUSTS AND LARGE HAIL AS THE PRIMARY THREATS. THE ACTIVITY IS EXPECTED
TO LINGER INTO THE EVENING...BUT SHOULD DIMINISH LATER TONIGHT.

IN ADDITION...HEAT INDICES AROUND 100 DEGREES WILL BE FAIRLY COMMON
THIS AFTERNOON...SO THOSE INVOLVED IN OUTDOOR ACTIVITIES SHOULD TAKE
THE NECESSARY PRECAUTIONS TO PREVENT HEAT RELATED ILLNESSES.

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

THE CHANCE FOR THUNDERSTORMS WILL CONTINUE ON TUESDAY...PERHAPS
STARTING IN THE MORNING AND CONTINUING OFF AND ON THROUGH THE DAY.
SOME THUNDERSTORMS MAY BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS
AND VERY HEAVY RAINFALL.

A SERIES OF UPPER LEVEL DISTURBANCES AND ANOTHER FRONT LATER IN THE
WEEK WILL KEEP CHANCES OF THUNDERSTORMS IN THE FORECAST THROUGH THE
REMAINDER OF THE PERIOD. AS IS TYPICAL FOR THIS TIME OF YEAR...THE
THREAT FOR STRONG TO DAMAGING WIND GUSTS AND LOCALLY HEAVY RAINFALL
WILL BE POSSIBLE WITH THE STRONGER STORMS.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
POSSIBLE THIS AFTERNOON AND EVENING.

KDW

In the hours before

Special weather statement, Jul 4, 2:32 PM CDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
232 PM CDT MON JUL 4 2011

ALZ016-042000-
CULLMAN-
232 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY FOR CULLMAN COUNTY UNTIL 300 PM
CDT...

AT 232 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR CRANE HILL...OR 15 MILES SOUTHWEST OF
CULLMAN...MOVING EAST AT 15 MPH.

PEA SIZE HAIL AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  LOGAN...JONES CHAPEL.
  BALDWIN...GOOD HOPE.

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

&&

LAT...LON 3399 8714 3400 8712 3419 8712 3429 8691
      3407 8683 3397 8713
TIME...MOT...LOC 1932Z 248DEG 14KT 3409 8707

KDW
Special weather statement, Jul 4, 2:46 PM CDT, 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
246 PM CDT MON JUL 4 2011

TNZ096-042015-
LINCOLN-
246 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY FOR LINCOLN COUNTY UNTIL 315 PM
CDT...

AT 246 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR MCBURG...OR 13 MILES WEST OF FAYETTEVILLE...
MOVING EAST AT 15 MPH.

PEA SIZE HAIL AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  COLDWATER.
  HARMS...CARMARGO.

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

&&

LAT...LON 3524 8658 3503 8664 3509 8684 3522 8684
      3526 8683 3527 8682 3527 8674
TIME...MOT...LOC 1946Z 284DEG 11KT 3517 8677

KDW

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 7:05 PM CDTSpecial Weather StatementHUNCullman25 min
Jul 3, 7:26 PM CDTSevere Thunderstorm WarningHUNCullman34 min
Jul 3, 7:59 PM CDTSpecial Weather StatementHUNCullman46 min
Jul 3, 8:06 PM CDTFlash Flood WarningHUNCullman3 hr
Jul 4, 2:32 PM CDTSpecial Weather StatementHUNCullman28 min
Jul 4, 3:01 PM CDTSpecial Weather StatementHUNCullman29 min
Jul 4, 3:26 PM CDTSevere Thunderstorm WarningHUNMadison34 min
Jul 4, 3:46 PM CDTSpecial Weather StatementHUNLimestone29 min
Jul 4, 3:53 PM CDTSpecial Weather StatementHUNColbert52 min
Jul 4, 4:09 PM CDTSpecial Weather StatementHUNMarshall36 min
Jul 4, 4:15 PM CDTSpecial Weather StatementHUNLimestone30 min
Jul 4, 4:22 PM CDTSevere Thunderstorm WarningHUNLimestone23 min
Jul 4, 4:28 PM CDTSevere Thunderstorm WarningHUNMarshall47 min
Jul 4, 4:43 PM CDTSpecial Weather StatementHUNLawrence32 min
Jul 4, 4:50 PM CDTSpecial Weather StatementHUNDeKalb25 min
Jul 4, 4:52 PM CDTSpecial Weather StatementHUNMadison38 min
Jul 4, 5:05 PM CDTSpecial Weather StatementHUNMorgan40 min
Jul 4, 5:08 PM CDTSevere Thunderstorm WarningHUNMorgan22 min
Jul 4, 5:24 PM CDTSevere Thunderstorm WarningHUNMadison, Marshall, Morgan36 min
Jul 4, 5:42 PM CDTSpecial Weather StatementHUNDeKalb33 min
Jul 4, 5:46 PM CDTSpecial Weather StatementHUNCullman44 min
Jul 4, 6:03 PM CDTSpecial Weather StatementHUNMarshall27 min
Jul 4, 6:04 PM CDTSevere Thunderstorm WarningHUNDeKalb26 min
Jul 4, 6:27 PM CDTSpecial Weather StatementHUNMarshall33 min
Jul 4, 6:30 PM CDTSpecial Weather StatementHUNDeKalb30 min
Jul 4, 2:46 PM CDTSpecial Weather StatementHUNLincoln29 min
Jul 4, 3:59 PM CDTSpecial Weather StatementHUNMoore31 min
Jul 4, 4:21 PM CDTSevere Thunderstorm WarningHUNFranklin39 min
Jul 4, 4:36 PM CDTSpecial Weather StatementHUNLincoln24 min
Jul 4, 4:48 PM CDTSevere Thunderstorm WarningHUNLincoln27 min
Jul 4, 5:15 PM CDTSpecial Weather StatementHUNMoore45 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2011Every severe thunderstorm warning 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.