Alert archive / Alabama / Special Marine Warnings in 2021
Special Marine Warning 113, NWS Mobile, AL
NWS Mobile, AL issued this special marine warning at May 2, 2021, 4:27 PM CDT. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 2, 2021, 4:27 PM CDT (21:27 UTC)
- Expired
- May 2, 2021, 6:30 PM CDT
- In force
- 2 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 34.0 mph
The radar
The Eglin Afb radar (KEVX), 123 km from the middle of the area, began a volume at 21:29 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.5 hours before the alert went out and 252 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1437 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
350
WHUS54 KMOB 022127
SMWMOB
GMZ650-655-670-675-022330-
/O.NEW.KMOB.MA.W.0113.210502T2127Z-210502T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mobile AL
427 PM CDT Sun May 2 2021
The National Weather Service in Mobile has issued a
* Special Marine Warning for...
Coastal waters from Okaloosa-Walton County Line to Pensacola FL out
20 NM...
Coastal waters from Pensacola FL to Pascagoula MS out 20 NM...
Waters from Okaloosa-Walton County Line to Pensacola FL from 20 to
60 NM...
Waters from Pensacola FL to Pascagoula MS from 20 to 60 NM...
* Until 630 PM CDT.
* At 426 PM CDT, strong thunderstorms were located along a line
extending from 6 nm south of Perdido Pass to 49 nm south of
Oriskany Reef, moving east at 30 knots.
HAZARD...Wind gusts 34 knots or greater.
SOURCE...Radar.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
* Locations impacted include...
East Pass At Destin, Pensacola Beach, Okaloosa Deep Water Reef,
Oriskany Reef, Perdido Pass and Fort Walton Liberty Ship Reef.
LAT...LON 2936 8648 2939 8666 2929 8740 3026 8763
3031 8738 3039 8657 3038 8639 2926 8640
TIME...MOT...LOC 2126Z 270DEG 30KT 3016 8752 2926 8730
HAIL...0.00IN
WIND...>34KTS
$$1 follow-up statement
309
FZUS74 KMOB 022215
MWSMOB
Marine Weather Statement
National Weather Service Mobile AL
515 PM CDT Sun May 2 2021
GMZ650-670-022224-
/O.CAN.KMOB.MA.W.0113.000000T0000Z-210502T2330Z/
515 PM CDT Sun May 2 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Pensacola FL to Pascagoula MS out 20 NM...
Waters from Pensacola FL to Pascagoula MS from 20 to 60 NM...
The thunderstorms have moved out of the warned area thus the warning
has been cancelled.
LAT...LON 2936 8648 2939 8666 2933 8710 3033 8721
3039 8657 3038 8639 2926 8640
TIME...MOT...LOC 2214Z 259DEG 21KT 3031 8717 2937 8701
$$
GMZ655-675-022330-
/O.CON.KMOB.MA.W.0113.000000T0000Z-210502T2330Z/
515 PM CDT Sun May 2 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 630 PM CDT...
For the following areas...
Coastal waters from Okaloosa-Walton County Line to Pensacola FL out
20 NM...
Waters from Okaloosa-Walton County Line to Pensacola FL from 20 to 60
NM...
At 514 PM CDT, strong thunderstorms were located along a line
extending from near Pensacola Beach to 40 nm south of Oriskany Reef,
moving east at 20 knots.
HAZARD...Wind gusts 34 knots or greater.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
East Pass At Destin, Pensacola Beach, Okaloosa Deep Water Reef,
Oriskany Reef and Fort Walton Liberty Ship Reef.
LAT...LON 2936 8648 2939 8666 2933 8710 3033 8721
3039 8657 3038 8639 2926 8640
TIME...MOT...LOC 2214Z 259DEG 21KT 3031 8717 2937 8701
HAIL...0.00IN
WIND...>34KTS
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 4:05 AM CDT | Small Craft Advisory | MOB | 30 hr | |
| May 2, 2:43 PM CDT | Special Marine Warning | MOB | 92 min | |
| May 2, 3:34 PM CDT | Special Marine Warning | MOB | 56 min | |
| May 2, 3:44 PM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke, Washington | 33 min |
| May 2, 4:04 PM CDT | Special Weather Statement | MOB | Clarke | 41 min |
| May 2, 4:21 PM CDT | Tornado Warning | MOB | Clarke, Monroe, Wilcox | 39 min |
| May 2, 5:31 PM CDT | Special Marine Warning | MOB | 26 min | |
| May 2, 6:05 PM CDT | Special Marine Warning | MOB | 49 min | |
| May 2, 5:35 PM CDT | Special Weather Statement | MOB | Okaloosa, Santa Rosa | 55 min |
| May 2, 11:04 AM CDT | Special Weather Statement | MOB | Perry | 41 min |
Nearby
Special Marine Warnings in Alabama, 2021Every special marine 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.