Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 252, NWS Jacksonville, FL

June 27, 2008Alachua County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 27, 2008, 4:47 PM EDT for Alachua County, Florida. It was in force for 28 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: Jun 27, 2008, 4:47 PM EDT (20:47 UTC)
Expired: Jun 27, 2008, 5:15 PM EDT
In force: 28 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Alachua County, FL

The radar

The Jacksonville radar (KJAX), 110 km from the middle of the area, began a volume at 20:50 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
Jun 27, 5:05 PM EDT	TSTM WND DMG	5 N Micanopy, FL	PAINES PRAIRIE PRESERVE STATE PARK REPORTED ONE TREE DOWN. TIME ESTIMATED BY RADAR.

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

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.8 hours before the alert went out and 111 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: 149 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1122 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 21 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.

000 
WUUS52 KJAX 272047
SVRJAX
FLC001-272115-
/O.NEW.KJAX.SV.W.0252.080627T2047Z-080627T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
447 PM EDT FRI JUN 27 2008

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALACHUA COUNTY IN NORTHERN FLORIDA

* UNTIL 515 PM EDT

* AT 447 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES WEST OF ROCHELLE...OR 8
  MILES SOUTH OF GAINESVILLE...AND MOVING EAST AT 9 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ROCHELLE...ORANGE HEIGHTS AND NEWNANS LAKE.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 2974 8212 2949 8208 2950 8241 2959 8244
TIME...MOT...LOC 2047Z 257DEG 8KT 2956 8236

$$

ZIBURA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 2:10 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Gilchrist, Suwannee	26 min
Jun 27, 4:38 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Duval, Saint Johns	28 min
Jun 27, 4:57 PM EDT	Areal Flood Advisory	JAX	Clay, Duval, Saint Johns	2 hr
Jun 27, 5:03 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Marion	22 min
Jun 27, 5:05 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Duval, Nassau	29 min
Jun 27, 5:18 PM EDT	Areal Flood Advisory	JAX	Alachua, Marion	117 min
Jun 27, 5:26 PM EDT	Special Marine Warning	JAX		94 min
Jun 27, 6:59 PM EDT	Special Marine Warning	JAX		91 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008 Every severe thunderstorm warning in 2008

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.