Alert archive / Georgia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 13, NWS Jacksonville, FL

March 3, 2019Coffee County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Mar 3, 2019, 4:32 PM EST for Coffee County, Georgia. It was in force for 28 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
Mar 3, 2019, 4:32 PM EST (21:32 UTC)
Expired
Mar 3, 2019, 5:00 PM EST
In force
28 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Tornado
Possible
Hail
1.25 in
Wind
50.0 mph

County Coffee County, GA

The radar

The Moody AFB radar (KVAX), 84 km from the middle of the area, began a volume at 21:35 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
Mar 3, 4:46 PM ESTHAIL 0.883 Nnw Broxton, GAEMERGENCY MANAGER REPORTED NICKEL SIZE HAIL OBSERVED ALONG US HIGHWAY 441 2 MILES NORTH OF BROXTON. TIME ESTIMATED BY RADAR.
Mar 3, 5:02 PM ESTTSTM WND DMG4 Wnw Douglas, GACORRECTS PREVIOUS TORNADO REPORT FROM 4 WNW DOUGLAS. EMERGENCY MANAGER REPORTS THAT FUNNEL CLOUD DID NOT TOUCH DOWN. A MOBILE HOME THAT HAD A NEW ROOF OVERLAID ON TOP OF AN OLD ONE HAD THE ROOF PEELED BACK. NO OTHER DAMAGE WAS REPORTED.
Mar 3, 5:02 PM ESTHAIL 15 Sse Broxton, GAMEDIA RELAYED A PHOTO ON SOCIAL MEDIA OF QUARTER SIZE HAIL IN DOUGLAS, GA AT COFFEE HIGH SCHOOL. TIME ESTIMATED BY RADAR.
Mar 3, 5:02 PM ESTTORNADO4 Wnw Douglas, GAEMERGENCY MANAGER RELAYED A REPORT OF A TORNADO OBSERVED NORTH OF STATE HIGHWAY 32 ON THE GROUND AT 502PM.

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

IssuedProductOfficeLasted
Mar 3, 3:35 PM ESTTornado WatchSPC7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.5 hours before the alert went out and 175 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 2019-03-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 684 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 2019-03-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
684 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
640 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted.

646 
WUUS52 KJAX 032132
SVRJAX
GAC069-032200-
/O.NEW.KJAX.SV.W.0013.190303T2132Z-190303T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Key West FL
Issued by National Weather Service Key West FL
432 PM EST SUN MAR 3 2019

The National Weather Service in Key West has issued a

* Severe Thunderstorm Warning for...
  Central Coffee County in southeastern Georgia...

* Until 500 PM EST.

* At 431 PM EST, a severe thunderstorm was located near Ocilla,
  moving east at 45 mph.

  HAZARD...Half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* Locations impacted include...
  Douglas, Broxton, Ambrose, Pridgen and West Green. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter such as an interior room, a
bathroom, closet or basement.

&&

A tornado watch remains in effect until 1100 PM EST for southeastern
Georgia.

LAT...LON 3179 8285 3167 8284 3167 8276 3156 8271
      3152 8308 3156 8306 3161 8306 3161 8305
      3162 8304 3163 8301 3166 8301 3166 8300
      3173 8300
TIME...MOT...LOC 2131Z 254DEG 40KT 3158 8316 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...<50MPH
 
$$

11

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 3, 9:44 AM EST, 6 hours 48 minutes earlier.

Area forecast discussion, Mar 3, 9:44 AM EST, 6 hours 48 minutes before
Area Forecast Discussion
National Weather Service Jacksonville FL
944 AM EST Sun Mar 3 2019

...STRONG TO SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND
THIS EVENING ACROSS MAINLY SOUTHEAST GEORGIA...

.UPDATE...Morning fog and low clouds gradually lifting this
morning. Weak upper disturbance now spreading showers from the ne
Gulf into the eastern Fl panhandle. This activity will spread ne
across the Suwannee Valley into se Ga later this morning and
afternoon. An isolated strong to severe storm may be possible by late
this afternoon over se Ga as wind shear and instability increase.
A more widespread severe weather outbreak(damaging winds...hail...
and isolated tornadoes possible) is expected to occur over se Ga
this evening between 00z-05z as a stronger trough and associated cold
front develop a squall line to the nw of the area. The storms
will push se into ne Fl around midnight with weakening expected
overnight as a cold front pushes through by early Monday morning
bringing cooler and breezy conditions.

&&

.AVIATION...LIFR conditions due to low ceilings/fog will
gradually improve to MVFR around 16z this morning and then VFR
after 18z. Isolated showers and thunderstorms may affect SSI this
afternoon...with strong storms likely affecting SSI 00z-06z this
evening. Showers and storms will move se across the ne Fl TAF
sites between 05z-12z tonight as they gradually weaken. Winds will
increase to 10-15 knots this afternoon with a windshift to the nw
after midnight.

&&

.MARINE...Southwest winds will increase to 10-15 knots this
afternoon as a strong cold front pushes into the se U.S. The cold
front will increase winds to at least Caution levels this evening
with marginal Small Craft Advisory levels possible especially
over the Georgia waters tonight. Seas offshore will build to 3-5
feet overnight. Showers and thunderstorms will accompany the
strong cold front as it moves through the Georgia waters after
midnight. The shower activity should weaken as it crosses the
northeast Florida waters late tonight and Monday morning. Winds
will shift to north- northwesterly in the wake of the front by
sunrise over the Georgia waters and Monday morning for the
northeast Florida waters. Showers and perhaps a few thunderstorms
will exit the northeast Florida waters by early afternoon.

Rip Currents: Low risk will continue through at least Tuesday as
offshore winds prevail.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  79  51  63  43 /  40  70  20  10
SSI  75  60  65  47 /  20  60  20  10
JAX  81  64  70  48 /  20  50  30  10
SGJ  81  65  70  52 /  10  30  40  20
GNV  83  65  72  48 /  10  30  30  10
OCF  83  65  75  51 /  10  30  30  10

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...None.
GA...None.
AM...None.
&&

Zibura/Kennedy/

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 3, 4:11 PM ESTTornado WarningJAXAppling, Jeff Davis49 min
Mar 3, 4:41 PM ESTTornado WarningJAXAppling, Bacon, Coffee, Jeff Davis49 min
Mar 3, 4:49 PM ESTSevere Thunderstorm WarningJAXAtkinson, Bacon, Coffee26 min
Mar 3, 5:01 PM ESTTornado WarningJAXAtkinson, Bacon, Coffee, Jeff Davis44 min
Mar 3, 5:30 PM ESTTornado WarningJAXAppling, Bacon, Coffee, Pierce, Wayne45 min
Mar 3, 5:36 PM ESTTornado WarningJAXAppling, Coffee, Jeff Davis39 min
Mar 3, 6:11 PM ESTSevere Thunderstorm WarningJAXAppling, Bacon, Jeff Davis34 min
Mar 3, 6:14 PM ESTTornado WarningJAXWayne16 min
Mar 3, 6:48 PM ESTSevere Thunderstorm WarningJAXAppling, Wayne27 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2019Every severe thunderstorm warning in 2019

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.