Alert archive / Alabama / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 310, NWS Tallahassee, FL

July 20, 2015Henry County, Houston County, Alabama; Early County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 20, 2015, 4:26 PM CDT for Henry County, Houston County, Alabama; Early County, Georgia. It was in force for 34 min. 1 report 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: Jul 20, 2015, 4:26 PM CDT (21:26 UTC)
Expired: Jul 20, 2015, 5:00 PM CDT
In force: 34 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Henry County, AL, Houston County, AL, Early County, GA

The radar

The Ft Rucker radar (KEOX), 34 km from the middle of the area, began a volume at 21:28 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

Time	Report	Where	Remark
Jul 20, 4:47 PM CDT	TSTM WND DMG	4 E Webb, AL	TREE DOWN ON CEDAR SPRINGS ROAD

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

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.4 hours before the alert went out and 131 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 201 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 1150 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

519 
WUUS52 KTAE 202126
SVRTAE
ALC067-069-GAC099-202200-
/O.NEW.KTAE.SV.W.0310.150720T2126Z-150720T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
526 PM EDT MON JUL 20 2015

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HOUSTON COUNTY IN SOUTHEASTERN ALABAMA...
  SOUTHEASTERN HENRY COUNTY IN SOUTHEASTERN ALABAMA...
  WESTERN EARLY COUNTY IN SOUTHWESTERN GEORGIA...

* UNTIL 600 PM EDT/500 PM CDT/

* AT 526 PM EDT /426 PM CDT/...THE NATIONAL WEATHER SERVICE HAS
  DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
  IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR COLUMBIA...OR 11
  MILES EAST OF HEADLAND...AND MOVING SOUTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BLAKELY...COLUMBIA...HALEBURG...GRANDBERRY CROSSROADS...CEDAR
  SPRINGS...PLEASANT PLAINS...TUMBLETON...EARLY CO A/P...BARNES...
  SIGMA...SAWHATCHEE...ROCK HILL...BALKUM...FARLEY NUCLEAR PLANT...
  HILTON AND MILLER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE IMMEDIATELY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS UNTIL
THIS STORM PASSES.

&&

LAT...LON 3132 8531 3150 8520 3141 8483 3114 8501
TIME...MOT...LOC 2126Z 298DEG 18KT 3137 8514 

$$

42-DVD

1 follow-up statement

901 
WWUS52 KTAE 202157
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
557 PM EDT MON JUL 20 2015

ALC067-069-GAC099-202207-
/O.EXP.KTAE.SV.W.0310.000000T0000Z-150720T2200Z/
HOUSTON AL-HENRY AL-EARLY GA-
557 PM EDT MON JUL 20 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HOUSTON...
SOUTHEASTERN HENRY AND WESTERN EARLY COUNTIES WILL EXPIRE AT 600 PM
EDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
TALLAHASSEE.

LAT...LON 3132 8531 3150 8520 3141 8483 3114 8501
TIME...MOT...LOC 2155Z 298DEG 18KT 3137 8514 

$$

42-DVD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 7:08 PM CDT	Severe Thunderstorm Warning	TAE	Berrien, Brooks, Colquitt, Cook, Lanier, Lowndes	67 min
Jul 19, 7:57 PM CDT	Severe Thunderstorm Warning	TAE	Brooks, Lowndes	48 min
Jul 20, 5:36 PM CDT	Severe Thunderstorm Warning	TAE	Dougherty, Lee	39 min
Jul 20, 6:08 PM CDT	Severe Thunderstorm Warning	TAE	Dougherty, Lee, Worth	37 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2015 Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

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.