Alert archive / Alabama / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 210, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Aug 31, 2017, 11:37 AM CDT for Choctaw County, Clarke County, Alabama. It was in force for 38 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
- Aug 31, 2017, 11:37 AM CDT (16:37 UTC)
- Expired
- Aug 31, 2017, 12:15 PM CDT
- In force
- 38 min
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Choctaw County, AL, Clarke County, AL
The radar
The Mobile radar (KMOB), 136 km from the middle of the area, began a volume at 16:39 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
Birmingham, AL (KBMX), launched 12:00Z, 4.6 hours before the alert went out and 190 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.
- Mixed-layer CAPE
- 724 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 569 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.5
The text
As transmitted.
861
WUUS54 KMOB 311637
SVRMOB
ALC023-025-311715-
/O.NEW.KMOB.SV.W.0210.170831T1637Z-170831T1715Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mobile AL
1137 AM CDT THU AUG 31 2017
The National Weather Service in Mobile has issued a
* Severe Thunderstorm Warning for...
South central Choctaw County in southwestern Alabama...
Northwestern Clarke County in southwestern Alabama...
* Until 1215 PM CDT
* At 1137 AM CDT, a severe thunderstorm was located near Coffeeville,
or 20 miles south of Butler, moving northeast at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Coffeeville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3199 8810 3201 8809 3199 8807 3199 8771
3170 8811 3170 8822 3171 8827 3186 8832
3202 8812
TIME...MOT...LOC 1637Z 226DEG 46KT 3180 8815
HAIL...<.75IN
WIND...60MPH
$$3 follow-up statements
890
WWUS54 KMOB 311653
SVSMOB
Severe Weather Statement
National Weather Service Mobile AL
1153 AM CDT THU AUG 31 2017
ALC023-025-311715-
/O.CON.KMOB.SV.W.0210.000000T0000Z-170831T1715Z/
Choctaw AL-Clarke AL-
1153 AM CDT THU AUG 31 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR SOUTH CENTRAL CHOCTAW AND NORTHWESTERN CLARKE COUNTIES...
At 1152 AM CDT, a severe thunderstorm was located near Woods Bluff,
or 15 miles southeast of Butler, moving northeast at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Coffeeville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3199 8810 3201 8809 3199 8807 3199 8775
3171 8812 3173 8816 3176 8820 3194 8822
3202 8812
TIME...MOT...LOC 1652Z 221DEG 43KT 3195 8802
HAIL...<.75IN
WIND...60MPH
$$831
WWUS54 KMOB 311702
SVSMOB
Severe Weather Statement
National Weather Service Mobile AL
1202 PM CDT THU AUG 31 2017
ALC023-311712-
/O.CAN.KMOB.SV.W.0210.000000T0000Z-170831T1715Z/
Choctaw AL-
1202 PM CDT THU AUG 31 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHOCTAW COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3199 8775 3180 8801 3184 8811 3191 8811
3191 8808 3192 8807 3192 8806 3193 8805
3194 8807 3192 8809 3193 8810 3196 8809
3195 8808 3196 8807 3198 8807 3198 8806
3199 8807
TIME...MOT...LOC 1702Z 232DEG 41KT 3199 8789
$$
ALC025-311715-
/O.CON.KMOB.SV.W.0210.000000T0000Z-170831T1715Z/
Clarke AL-
1202 PM CDT THU AUG 31 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR NORTHWESTERN CLARKE COUNTY...
At 1202 PM CDT, a severe thunderstorm was located 7 miles south of
Sweet Water, or 10 miles northwest of Thomasville, moving northeast
at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
northwestern Clarke County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3199 8775 3180 8801 3184 8811 3191 8811
3191 8808 3192 8807 3192 8806 3193 8805
3194 8807 3192 8809 3193 8810 3196 8809
3195 8808 3196 8807 3198 8807 3198 8806
3199 8807
TIME...MOT...LOC 1702Z 232DEG 41KT 3199 8789
HAIL...<.75IN
WIND...60MPH
$$924
WWUS54 KMOB 311713
SVSMOB
Severe Weather Statement
National Weather Service Mobile AL
1213 PM CDT THU AUG 31 2017
ALC025-311723-
/O.EXP.KMOB.SV.W.0210.000000T0000Z-170831T1715Z/
Clarke AL-
1213 PM CDT THU AUG 31 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CLARKE COUNTY
WILL EXPIRE AT 1215 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.
LAT...LON 3199 8775 3180 8801 3184 8811 3191 8811
3191 8808 3192 8807 3192 8806 3193 8805
3194 8807 3192 8809 3193 8810 3196 8809
3195 8808 3196 8807 3198 8807 3198 8806
3199 8807
TIME...MOT...LOC 1713Z 226DEG 46KT 3209 8777
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:31 PM CDT | Special Weather Statement | MOB | Washington | 44 min |
| Aug 31, 1:17 AM CDT | Special Marine Warning | MOB | 43 min | |
| Aug 31, 2:17 AM CDT | Special Marine Warning | MOB | 28 min | |
| Aug 31, 3:11 AM CDT | Special Weather Statement | MOB | Covington | 34 min |
| Aug 31, 4:38 AM CDT | Special Weather Statement | MOB | Mobile | 37 min |
| Aug 31, 4:40 AM CDT | Areal Flood Advisory | MOB | Baldwin | 3 hr |
| Aug 31, 4:50 AM CDT | Areal Flood Advisory | MOB | Covington | 3 hr |
| Aug 31, 6:35 AM CDT | Areal Flood Advisory | MOB | Baldwin | 3 hr |
| Aug 31, 6:45 AM CDT | Special Marine Warning | MOB | 60 min | |
| Aug 31, 7:16 AM CDT | Special Weather Statement | MOB | Covington | 59 min |
| Aug 31, 7:37 AM CDT | Areal Flood Advisory | MOB | Covington, Escambia | 3 hr |
| Aug 31, 8:00 AM CDT | Special Marine Warning | MOB | 60 min | |
| Aug 31, 8:01 AM CDT | Special Weather Statement | MOB | Covington | 59 min |
| Aug 31, 9:02 AM CDT | Special Marine Warning | MOB | 58 min | |
| Aug 31, 9:06 AM CDT | Special Marine Warning | MOB | 54 min | |
| Aug 31, 9:46 AM CDT | Special Marine Warning | MOB | 44 min | |
| Aug 31, 10:00 AM CDT | Special Marine Warning | MOB | 60 min | |
| Aug 31, 10:20 AM CDT | Special Weather Statement | MOB | Choctaw | 40 min |
| Aug 31, 11:03 AM CDT | Special Marine Warning | MOB | 57 min | |
| Aug 31, 11:06 AM CDT | Special Weather Statement | MOB | Choctaw | 39 min |
| Aug 31, 12:56 PM CDT | Special Marine Warning | MOB | 64 min | |
| Aug 31, 3:03 PM CDT | River Flood Warning | MOB | Covington, Escambia | 54 hr |
| Aug 31, 3:06 PM CDT | River Flood Warning | MOB | Baldwin | 22 hr |
| Aug 31, 3:46 PM CDT | Special Weather Statement | MOB | Wilcox | 14 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2017Every severe thunderstorm warning 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.