Alert archive / Alabama / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 113, NWS Birmingham, AL

August 7, 2018Jefferson County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 7, 2018, 4:30 PM CDT for Jefferson County, Alabama. It was in force for 30 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 7, 2018, 4:30 PM CDT (21:30 UTC)
Expired
Aug 7, 2018, 5:00 PM CDT
In force
30 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 49 km from the middle of the area, began a volume at 21:30 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.

What was reported inside it

TimeReportWhereRemark
Aug 7, 4:45 PM CDTTSTM WND DMG1 Ne Center Point, ALTREES DOWN IN THE 500 BLOCK OF 11TH ST. TIME ESTIMATED FROM RADAR.
Aug 7, 4:45 PM CDTTSTM WND DMG2 Sse Center Point, ALCORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 SSE CENTER POINT. TREES DOWN IN THE 1100 BLOCK OF BREWSTER RD. TIME ESTIMATED FROM RADAR.
Aug 7, 4:45 PM CDTTSTM WND DMG2 Sse Center Point, ALTREES DOWN IN THE 100 BLOCK OF BREWSTER RD. TIME ESTIMATED FROM RADAR.
Aug 7, 4:55 PM CDTHAIL 0.5Trussville, ALPEA TO DIME SIZE HAIL REPORTED IN TRUSSVILLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.5 hours before the alert went out and 49 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, Birmingham, AL at 12:00Z on 2018-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1097 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2018-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 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
1097 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1046 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
-26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

811 
WUUS54 KBMX 072130
SVRBMX
ALC073-072200-
/O.NEW.KBMX.SV.W.0113.180807T2130Z-180807T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
430 PM CDT TUE AUG 7 2018

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northeastern Jefferson County in central Alabama...

* Until 500 PM CDT.

* At 430 PM CDT, severe thunderstorms were located along a line
  extending from near Fultondale to near Alton, and are nearly
  stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Northern Birmingham, Vestavia Hills, Mountain Brook, Trussville,
  Gardendale, Irondale, Leeds, Moody, Fultondale, Center Point,
  Pinson, Tarrant, Brookside, Ketona Lakes, Chalkville, Shops of
  Grand River, Kingston, Grayson Valley, Barber Motorsports Park and
  Birmingham Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3363 8654 3362 8654 3362 8655 3356 8655
      3356 8654 3355 8654 3348 8662 3358 8693
      3372 8682
TIME...MOT...LOC 2130Z 206DEG 4KT 3361 8684 3356 8666 

HAIL...1.00IN
WIND...60MPH
 
$$

32/Davis
1 follow-up statement
216 
WWUS54 KBMX 072147
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
447 PM CDT TUE AUG 7 2018

ALC073-072200-
/O.CON.KBMX.SV.W.0113.000000T0000Z-180807T2200Z/
Jefferson AL-
447 PM CDT TUE AUG 7 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR EAST CENTRAL JEFFERSON COUNTY...

At 446 PM CDT, severe thunderstorms were located along a line
extending from Birmingham to Leeds, moving east at 10 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Northeastern Birmingham, Trussville, Gardendale, Irondale, Leeds,
Moody, Fultondale, Center Point, Pinson, Tarrant, Ketona Lakes,
Chalkville, Shops of Grand River, Alton, Grayson Valley, Barber
Motorsports Park, Birmingham Airport, Birmingham Race Course, Ruffner
Mountain and Danville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3363 8654 3362 8654 3362 8655 3356 8655
      3356 8654 3355 8654 3349 8661 3357 8684
      3369 8673
TIME...MOT...LOC 2146Z 258DEG 7KT 3361 8673 3353 8658 

HAIL...1.00IN
WIND...60MPH
 
$$

32/Davis

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 8:44 PM CDTSpecial Weather StatementBMXBarbour31 min
Aug 7, 3:18 AM CDTHeat AdvisoryBMXAutauga, Barbour, Bullock, Dallas, Elmore, Greene and 10 more16 hr
Aug 7, 1:21 PM CDTSpecial Weather StatementBMXMontgomery24 min
Aug 7, 1:26 PM CDTSpecial Weather StatementBMXElmore34 min
Aug 7, 1:37 PM CDTSpecial Weather StatementBMXWalker23 min
Aug 7, 1:44 PM CDTSpecial Weather StatementBMXMontgomery46 min
Aug 7, 2:38 PM CDTSpecial Weather StatementBMXFayette37 min
Aug 7, 2:44 PM CDTSpecial Weather StatementBMXChambers31 min
Aug 7, 2:53 PM CDTSpecial Weather StatementBMXCoosa37 min
Aug 7, 2:54 PM CDTSpecial Weather StatementBMXTuscaloosa36 min
Aug 7, 3:08 PM CDTSpecial Weather StatementBMXBibb37 min
Aug 7, 3:13 PM CDTSpecial Weather StatementBMXChambers32 min
Aug 7, 3:23 PM CDTSpecial Weather StatementBMXChilton37 min
Aug 7, 3:30 PM CDTSpecial Weather StatementBMXFayette30 min
Aug 7, 3:44 PM CDTSpecial Weather StatementBMXMarion31 min
Aug 7, 3:58 PM CDTSpecial Weather StatementBMXWalker32 min
Aug 7, 4:17 PM CDTSpecial Weather StatementBMXJefferson28 min
Aug 7, 4:20 PM CDTSpecial Weather StatementBMXWalker25 min
Aug 7, 4:21 PM CDTSpecial Weather StatementBMXMarion24 min
Aug 7, 4:23 PM CDTSpecial Weather StatementBMXJefferson37 min
Aug 7, 4:37 PM CDTSpecial Weather StatementBMXHale38 min
Aug 7, 4:49 PM CDTAreal Flood AdvisoryBMXJefferson3 hr
Aug 7, 4:57 PM CDTSevere Thunderstorm WarningBMXJefferson, St. Clair33 min
Aug 7, 5:04 PM CDTFlash Flood WarningBMXJefferson3 hr
Aug 7, 5:11 PM CDTSpecial Weather StatementBMXHale34 min
Aug 7, 6:20 PM CDTSpecial Weather StatementBMXEtowah25 min
Aug 7, 6:39 PM CDTSpecial Weather StatementBMXEtowah36 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2018Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.