Alert archive / Florida / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 101, NWS Mobile, AL

April 19, 2020Okaloosa County, Florida; Covington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 19, 2020, 10:54 PM CDT for Okaloosa County, Florida; Covington County, Alabama. It was in force for 36 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
Apr 19, 2020, 10:54 PM CDT (03:54 UTC)
Expired
Apr 19, 2020, 11:30 PM CDT
In force
36 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Covington County, AL, Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 74 km from the middle of the area, began a volume at 03:54 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
Apr 19, 10:54 PM CDTTSTM WND GST 601 Nnw Sanford, ALAWOS STATION K79J AT THE ANDALUSIA OPP AIRPORT MEASURED A WIND GUST OF 60 MPH.

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

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 19, 9:39 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 3.9 hours before the alert went out and 217 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, Tallahassee Rgnl, FL at 00:00Z on 2020-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2182 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, Tallahassee Rgnl, FL at 00:00Z on 2020-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 259 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
2182 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
709 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
259 m²/s²
0-3 km storm-relative helicity
327 m²/s²
Significant tornado parameter
3.5
Supercell composite
17.9

Open this sounding in Storm Lab

The text

As transmitted.

073 
WUUS54 KMOB 200354 RRA
SVRMOB
ALC039-FLC091-200430-
/O.NEW.KMOB.SV.W.0101.200420T0354Z-200420T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1054 PM CDT Sun Apr 19 2020

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Covington County in south central Alabama...
  Northeastern Okaloosa County in northwestern Florida...

* Until 1130 PM CDT.

* At 1054 PM CDT, a severe thunderstorm was located 11 miles
  northwest of Lockhart, or 11 miles south of Andalusia, moving
  southeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Andalusia, Florala, Laurel Hill, Lockhart and Heath. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 400 AM CDT for south central
Alabama...and northwestern Florida.

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

&&

LAT...LON 3099 8639 3076 8639 3109 8670 3113 8670
      3142 8647 3118 8619 3100 8619
TIME...MOT...LOC 0354Z 310DEG 48KT 3115 8644 

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

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 9:42 PM CDTSevere Thunderstorm WarningMOBEscambia19 min
Apr 19, 11:14 PM CDTSevere Thunderstorm WarningMOBEscambia, Santa Rosa61 min
Apr 19, 11:29 PM CDTTornado WarningMOBEscambia31 min
Apr 19, 11:41 PM CDTSevere Thunderstorm WarningMOBEscambia, Santa Rosa34 min
Apr 19, 11:45 PM CDTTornado WarningMOBEscambia30 min
Apr 19, 11:55 PM CDTSevere Thunderstorm WarningMOBOkaloosa15 min
Apr 19, 11:58 PM CDTSevere Thunderstorm WarningMOBOkaloosa62 min
Apr 20, 12:01 AM CDTTornado WarningMOBEscambia, Santa Rosa29 min
Apr 20, 12:05 AM CDTSevere Thunderstorm WarningMOBEscambia, Okaloosa, Santa Rosa40 min
Apr 20, 12:10 AM CDTSevere Thunderstorm WarningMOBEscambia, Okaloosa, Santa Rosa50 min
Apr 20, 12:54 AM CDTSevere Thunderstorm WarningMOBEscambia, Okaloosa, Santa Rosa66 min
Apr 19, 7:10 PM CDTTornado WarningMOBButler, Monroe, Wilcox22 min
Apr 19, 7:30 PM CDTSevere Thunderstorm WarningMOBButler30 min
Apr 19, 7:54 PM CDTSevere Thunderstorm WarningMOBCrenshaw30 min
Apr 19, 8:10 PM CDTFlash Flood WarningMOBClarke, Washington3 hr
Apr 19, 8:24 PM CDTRiver Flood WarningMOBDallas, Monroe, Wilcox8 days
Apr 19, 8:50 PM CDTSevere Thunderstorm WarningMOBWashington55 min
Apr 19, 9:04 PM CDTFlash Flood WarningMOBBaldwin, Clarke, Escambia, Monroe, Washington3 hr
Apr 19, 9:07 PM CDTTornado WarningMOBWashington38 min
Apr 19, 9:23 PM CDTTornado WarningMOBBaldwin, Clarke, Washington24 min
Apr 19, 10:06 PM CDTSpecial Weather StatementMOBButler, Conecuh, Covington, Crenshaw39 min
Apr 19, 10:35 PM CDTSevere Thunderstorm WarningMOBConecuh, Covington, Escambia25 min
Apr 19, 10:38 PM CDTSevere Thunderstorm WarningMOBMobile52 min
Apr 19, 10:40 PM CDTSevere Thunderstorm WarningMOBCovington, Crenshaw35 min
Apr 19, 10:47 PM CDTTornado WarningMOBCovington28 min
Apr 19, 10:52 PM CDTSpecial Marine WarningMOB53 min
Apr 19, 10:54 PM CDTSevere Thunderstorm WarningMOBMobile51 min
Apr 19, 11:03 PM CDTTornado WarningMOBMobile27 min
Apr 19, 11:07 PM CDTTornado WarningMOBMobile38 min
Apr 19, 11:26 PM CDTTornado WarningMOBBaldwin29 min
Apr 19, 11:43 PM CDTSevere Thunderstorm WarningMOBMobile47 min
Apr 19, 11:45 PM CDTSpecial Marine WarningMOB90 min
Apr 19, 11:54 PM CDTSpecial Marine WarningMOB96 min
Apr 20, 12:07 AM CDTSpecial Marine WarningMOB113 min
Apr 20, 12:28 AM CDTSevere Thunderstorm WarningMOBMobile28 min
Apr 20, 12:45 AM CDTSpecial Weather StatementMOBCovington30 min
Apr 20, 12:50 AM CDTSpecial Marine WarningMOB85 min
Apr 20, 12:54 AM CDTSpecial Marine WarningMOB2 hr
Apr 20, 1:25 AM CDTSpecial Marine WarningMOB35 min
Apr 20, 2:13 AM CDTSpecial Marine WarningMOB43 min
Apr 20, 2:59 AM CDTSpecial Marine WarningMOB39 min

Nearby

Severe Thunderstorm Warnings in Florida, 2020Severe Thunderstorm Warnings in Alabama, 2020Every severe thunderstorm warning in 2020

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.