Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 70, NWS Jacksonville, FL

May 24, 2017Saint Johns County, Florida

NWS Jacksonville, FL issued this tornado warning at May 24, 2017, 9:47 AM EDT for Saint Johns County, Florida. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 24, 2017, 9:47 AM EDT (13:47 UTC)
Expired
May 24, 2017, 10:15 AM EDT
In force
28 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 79 km from the middle of the area, began a volume at 13:51 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 24, 6:56 AM EDTTornado WatchSPC8 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 1.8 hours before the alert went out and 80 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, Jacksonville, FL at 12:00Z on 2017-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 868 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, Jacksonville, FL at 12:00Z on 2017-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.19395878Sfc1 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
868 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
752 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
1.2
Supercell composite
9.7

Open this sounding in Storm Lab

The text

As transmitted.

433 
WFUS52 KJAX 241347
TORJAX
FLC109-241415-
/O.NEW.KJAX.TO.W.0070.170524T1347Z-170524T1415Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jacksonville FL
947 AM EDT WED MAY 24 2017

The National Weather Service in Jacksonville has issued a

* Tornado Warning for...
  Southern St. Johns County in northeastern Florida...

* Until 1015 AM EDT
    
* At 946 AM EDT, a severe thunderstorm capable of producing a tornado
  was located over Federal Point, or near Hastings, moving northeast 
  at 35 mph. The rotation has weakened slightly...but could quickly 
  reintensify. A tornado could form at any time. 

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Saint Augustine Shores around 1010 AM EDT. 

Other locations impacted by this tornadic thunderstorm include Elkton
and Bakersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 2974 8153 2976 8153 2977 8154 2986 8159
      2995 8143 2977 8130
TIME...MOT...LOC 1346Z 245DEG 30KT 2978 8157 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

WOLF
1 follow-up statement
380 
WWUS52 KJAX 241400
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
1000 AM EDT WED MAY 24 2017

FLC109-241415-
/O.CON.KJAX.TO.W.0070.000000T0000Z-170524T1415Z/
St. Johns FL-
1000 AM EDT WED MAY 24 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM EDT FOR EAST
CENTRAL ST. JOHNS COUNTY...
    
At 1000 AM EDT, a severe thunderstorm capable of producing a tornado
was located 8 miles west of Saint Augustine South, or 8 miles
northeast of Hastings, moving northeast at 35 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Saint Augustine Shores around 1010 AM EDT. 

Other locations impacted by this tornadic thunderstorm include
Elkton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 2977 8150 2984 8151 2990 8141 2981 8133
      2979 8131
TIME...MOT...LOC 1400Z 245DEG 30KT 2983 8145 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

WOLF

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 8:35 PM EDTSpecial Weather StatementJAXSuwannee40 min
May 23, 8:39 PM EDTSpecial Weather StatementJAXBaker, Columbia51 min
May 23, 8:53 PM EDTTornado WarningJAXBaker, Duval, Nassau20 min
May 23, 9:12 PM EDTSevere Thunderstorm WarningJAXBaker, Duval, Nassau17 min
May 23, 9:18 PM EDTSpecial Weather StatementJAXColumbia42 min
May 23, 9:28 PM EDTSpecial Weather StatementJAXNassau47 min
May 23, 9:53 PM EDTAreal Flood AdvisoryJAXBaker, Columbia, Suwannee3 hr
May 24, 12:30 AM EDTSpecial Weather StatementJAXClay45 min
May 24, 12:51 AM EDTSpecial Weather StatementJAXDuval39 min
May 24, 3:13 AM EDTSpecial Weather StatementJAXAlachua47 min
May 24, 3:16 AM EDTSpecial Weather StatementJAXClay44 min
May 24, 3:43 AM EDTSevere Thunderstorm WarningJAXAlachua, Clay, Putnam47 min
May 24, 4:25 AM EDTSevere Thunderstorm WarningJAXClay, Putnam, Saint Johns50 min
May 24, 4:58 AM EDTSevere Thunderstorm WarningJAXSaint Johns20 min
May 24, 4:59 AM EDTSpecial Marine WarningJAX61 min
May 24, 5:47 AM EDTSpecial Weather StatementJAXPutnam43 min
May 24, 6:14 AM EDTSpecial Weather StatementJAXPutnam46 min
May 24, 6:18 AM EDTTornado WarningJAXPutnam, Saint Johns27 min
May 24, 6:44 AM EDTTornado WarningJAXSaint Johns31 min
May 24, 6:49 AM EDTSpecial Marine WarningJAX56 min
May 24, 7:04 AM EDTSpecial Weather StatementJAXFlagler41 min
May 24, 7:46 AM EDTSpecial Marine WarningJAX89 min
May 24, 8:09 AM EDTSpecial Weather StatementJAXSaint Johns51 min
May 24, 8:36 AM EDTSpecial Weather StatementJAXPutnam39 min
May 24, 8:56 AM EDTAreal Flood AdvisoryJAXPutnam3 hr
May 24, 8:58 AM EDTSpecial Weather StatementJAXSaint Johns47 min
May 24, 9:23 AM EDTSevere Thunderstorm WarningJAXPutnam37 min
May 24, 9:29 AM EDTTornado WarningJAXPutnam31 min
May 24, 10:07 AM EDTTornado WarningJAXSaint Johns23 min
May 24, 10:09 AM EDTSpecial Marine WarningJAX51 min
May 24, 10:39 AM EDTSpecial Weather StatementJAXSaint Johns51 min
May 24, 10:47 AM EDTSevere Thunderstorm WarningJAXBaker, Columbia, Hamilton, Suwannee43 min
May 24, 10:49 AM EDTSpecial Marine WarningJAX116 min
May 24, 11:37 AM EDTSevere Thunderstorm WarningJAXClay, Duval, Saint Johns38 min
May 24, 12:06 PM EDTAreal Flood AdvisoryJAXBaker, Duval, Nassau114 min
May 24, 12:11 PM EDTSpecial Weather StatementJAXDuval49 min
May 24, 12:18 PM EDTSpecial Weather StatementJAXAlachua, Bradford, Union42 min
May 24, 12:42 PM EDTSpecial Marine WarningJAX93 min
May 24, 12:52 PM EDTSpecial Weather StatementJAXClay, Duval38 min
May 24, 1:19 PM EDTAreal Flood WarningJAXDuval, Nassau3 hr
May 24, 1:19 PM EDTSpecial Weather StatementJAXDuval, Saint Johns26 min
May 24, 1:24 PM EDTSpecial Marine WarningJAX2 hr
May 24, 1:40 PM EDTSpecial Weather StatementJAXAlachua, Clay, Flagler, Marion, Putnam, Saint Johns65 min
May 24, 1:52 PM EDTAreal Flood AdvisoryJAXBaker, Bradford, Clay, Duval, Saint Johns, Union3 hr
May 24, 2:44 PM EDTSpecial Weather StatementJAXClay, Flagler, Marion, Putnam, Saint Johns46 min
May 24, 3:25 PM EDTSpecial Weather StatementJAXFlagler, Putnam, Saint Johns35 min
May 24, 3:27 PM EDTSpecial Marine WarningJAX93 min

Nearby

Tornado Warnings in Florida, 2017Every tornado warning in 2017Tornadoes in 2017

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.