Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 10, NWS Jacksonville, FL

February 7, 2021Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Feb 7, 2021, 1:09 AM EST for Marion County, Florida. It was in force for 20 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
Feb 7, 2021, 1:09 AM EST (06:09 UTC)
Expired
Feb 7, 2021, 1:29 AM EST
In force
20 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Marion County, FL

The radar

The Jacksonville radar (KJAX), 137 km from the middle of the area, began a volume at 06:11 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
Feb 6, 10:58 PM ESTTornado WatchSPC8 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 00:00Z, 6.2 hours before the alert went out and 181 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, Tampa Bay, FL at 00:00Z on 2021-02-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1198 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, Tampa Bay, FL at 00:00Z on 2021-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 249 square meters per square second.1939587897Sfc1 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
1198 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
813 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
249 m²/s²
0-3 km storm-relative helicity
286 m²/s²
Significant tornado parameter
1.8
Supercell composite
7.7

Open this sounding in Storm Lab

The text

As transmitted.

887 
WUUS52 KJAX 070609
SVRJAX
FLC083-070700-
/O.NEW.KJAX.SV.W.0010.210207T0609Z-210207T0700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
109 AM EST Sun Feb 7 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Central Marion County in northern Florida...

* Until 200 AM EST.

* At 108 AM EST, a severe thunderstorm was located near Rainbow Lakes
  Estates, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Ocala, Rainbow Lakes Estates, Fort McCoy, Citra, Lynne, Sparr,
  Anthony, Orange Springs, Ocala Airport and Reddick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 AM EST for northern and
northeastern Florida.

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2901 8239 2902 8241 2922 8248 2922 8240
      2928 8241 2943 8216 2942 8215 2943 8214
      2943 8209 2944 8208 2944 8206 2947 8206
      2949 8203 2951 8194 2950 8191 2951 8190
      2926 8171 2902 8238
TIME...MOT...LOC 0608Z 239DEG 50KT 2920 8238 

HAIL...<.75IN
WIND...60MPH
 
$$

BOOTHE
1 follow-up statement
101 
WWUS52 KJAX 070629
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
129 AM EST Sun Feb 7 2021

FLC083-070638-
/O.CAN.KJAX.SV.W.0010.000000T0000Z-210207T0700Z/
Marion FL-
129 AM EST Sun Feb 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MARION COUNTY IS
CANCELLED...
                
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 has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Tornado Watch remains in effect until 700 AM EST for northern and
northeastern Florida.

LAT...LON 2901 8239 2902 8241 2922 8248 2922 8240
      2928 8241 2943 8216 2942 8215 2943 8214
      2943 8209 2944 8208 2944 8206 2947 8206
      2949 8203 2951 8194 2950 8191 2951 8190
      2926 8171 2902 8238
TIME...MOT...LOC 0628Z 239DEG 50KT 2935 8210 

$$

BOOTHE

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 6, 7:12 PM ESTSpecial Weather StatementJAXSaint Johns48 min
Feb 6, 7:31 PM ESTSpecial Weather StatementJAXMarion44 min
Feb 6, 7:48 PM ESTSpecial Weather StatementJAXPutnam42 min
Feb 6, 8:01 PM ESTSpecial Marine WarningJAX59 min
Feb 6, 8:02 PM ESTSpecial Marine WarningJAX28 min
Feb 6, 8:17 PM ESTSpecial Weather StatementJAXClay43 min
Feb 6, 8:22 PM ESTSpecial Weather StatementJAXFlagler, Putnam38 min
Feb 6, 8:23 PM ESTSpecial Marine WarningJAX97 min
Feb 6, 8:39 PM ESTSevere Thunderstorm WarningJAXFlagler23 min
Feb 6, 8:52 PM ESTSpecial Weather StatementJAXGilchrist38 min
Feb 6, 8:57 PM ESTSpecial Weather StatementJAXSaint Johns33 min
Feb 6, 9:20 PM ESTSpecial Marine WarningJAX41 min
Feb 6, 9:32 PM ESTSpecial Weather StatementJAXColumbia43 min
Feb 6, 9:35 PM ESTSpecial Marine WarningJAX55 min
Feb 6, 10:01 PM ESTSpecial Marine WarningJAX44 min
Feb 6, 11:59 PM ESTSpecial Weather StatementJAXAlachua46 min
Feb 7, 12:10 AM ESTSpecial Weather StatementJAXAlachua50 min
Feb 7, 12:36 AM ESTSpecial Weather StatementJAXSaint Johns39 min
Feb 7, 12:48 AM ESTSpecial Weather StatementJAXMarion42 min
Feb 7, 1:22 AM ESTSpecial Weather StatementJAXGilchrist38 min
Feb 7, 1:24 AM ESTSpecial Weather StatementJAXDuval51 min
Feb 7, 1:26 AM ESTSpecial Marine WarningJAX34 min
Feb 7, 1:36 AM ESTSpecial Weather StatementJAXMarion24 min
Feb 7, 1:45 AM ESTSpecial Marine WarningJAX45 min
Feb 7, 1:48 AM ESTSpecial Weather StatementJAXUnion27 min
Feb 7, 2:01 AM ESTSpecial Weather StatementJAXMarion29 min
Feb 7, 2:06 AM ESTSpecial Weather StatementJAXFlagler9 min
Feb 7, 2:11 AM ESTSpecial Marine WarningJAX34 min
Feb 7, 2:20 AM ESTSpecial Marine WarningJAX40 min
Feb 7, 4:08 AM ESTSpecial Weather StatementJAXAlachua, Bradford, Clay52 min
Feb 7, 4:19 AM ESTSpecial Weather StatementJAXMarion26 min
Feb 7, 4:45 AM ESTSpecial Weather StatementJAXDuval30 min
Feb 7, 4:55 AM ESTSpecial Marine WarningJAX50 min
Feb 7, 5:07 AM ESTSpecial Marine WarningJAX23 min
Feb 7, 6:39 AM ESTSpecial Marine WarningJAX96 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning in 2021

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.