Alert archive / Alabama / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 87, NWS Mobile, AL

July 31, 2018Escambia County, Florida; Baldwin County, Escambia County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 31, 2018, 10:21 AM CDT for Escambia County, Florida; Baldwin County, Escambia County, Alabama. It was in force for 16 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: Jul 31, 2018, 10:21 AM CDT (15:21 UTC)
Expired: Jul 31, 2018, 10:37 AM CDT
In force: 16 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Baldwin County, AL, Escambia County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 60 km from the middle of the area, began a volume at 15:21 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.4 hours before the alert went out and 207 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: 2932 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 754 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -47 m²/s²
0-3 km storm-relative helicity: -36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

670 
WUUS54 KMOB 311521
SVRMOB
ALC003-053-FLC033-311615-
/O.NEW.KMOB.SV.W.0087.180731T1521Z-180731T1615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1021 AM CDT TUE JUL 31 2018

The National Weather Service in Mobile has issued a

* Severe Thunderstorm Warning for...
  Central Baldwin County in southwestern Alabama...
  Southwestern Escambia County in south central Alabama...
  Northwestern Escambia County in northwestern Florida...

* Until 1115 AM CDT.

* At 1021 AM CDT, a severe thunderstorm was located over Bay Minette,
  moving northeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Bay Minette, Atmore, Flomaton, McCullough, Stapleton, Bratt, I65
  And CR 1, I65 And AL 21 and Poarch Creek Reservation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3086 8794 3124 8754 3101 8724 3072 8779
TIME...MOT...LOC 1521Z 233DEG 23KT 3088 8773 

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

1 follow-up statement

203 
WWUS54 KMOB 311537
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
1037 AM CDT TUE JUL 31 2018

ALC003-053-FLC033-311547-
/O.CAN.KMOB.SV.W.0087.000000T0000Z-180731T1615Z/
Baldwin AL-Escambia AL-Escambia FL-
1037 AM CDT TUE JUL 31 2018

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BALDWIN...SOUTHWESTERN
ESCAMBIA AND NORTHWESTERN ESCAMBIA COUNTIES 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.

LAT...LON 3086 8794 3124 8754 3101 8724 3072 8779
TIME...MOT...LOC 1535Z 233DEG 23KT 3094 8763 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 1:50 PM CDT	Flash Flood Watch	MOB	Escambia, Okaloosa, Santa Rosa	48 hr
Jul 31, 9:38 AM CDT	Special Marine Warning	MOB		22 min
Jul 31, 10:00 AM CDT	Special Weather Statement	MOB	Conecuh, Escambia	60 min
Jul 31, 10:30 AM CDT	Special Marine Warning	MOB		38 min
Jul 31, 10:52 AM CDT	Special Weather Statement	MOB	Escambia	53 min
Jul 31, 11:03 AM CDT	Areal Flood Advisory	MOB	Conecuh, Escambia, Monroe	57 min
Jul 31, 11:32 AM CDT	Special Weather Statement	MOB	Mobile	28 min
Jul 31, 11:35 AM CDT	Special Weather Statement	MOB	Washington	40 min
Jul 31, 11:40 AM CDT	Areal Flood Advisory	MOB	Butler	65 min
Jul 31, 11:46 AM CDT	Special Weather Statement	MOB	Covington	29 min
Jul 31, 11:56 AM CDT	Special Weather Statement	MOB	Butler	34 min
Jul 31, 12:15 PM CDT	Special Weather Statement	MOB	Covington	30 min
Jul 31, 12:39 PM CDT	Special Weather Statement	MOB	Covington	36 min
Jul 31, 1:11 PM CDT	Special Weather Statement	MOB	Washington	49 min
Jul 31, 2:03 PM CDT	Special Weather Statement	MOB	Clarke	42 min
Jul 31, 2:27 PM CDT	Special Weather Statement	MOB	Choctaw	48 min
Jul 31, 2:38 PM CDT	Areal Flood Advisory	MOB	Choctaw	3 hr
Jul 31, 3:04 PM CDT	Flash Flood Warning	MOB	Choctaw	3 hr
Jul 31, 4:18 PM CDT	Areal Flood Advisory	MOB	Wilcox	3 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2018 Severe Thunderstorm Warnings in Florida, 2018 Every severe thunderstorm warning in 2018

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.