Alert archive / Florida / Flash Flood Warnings in 2017
Flash Flood Warning 17, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at May 20, 2017, 11:30 PM CDT for Okaloosa County, Santa Rosa County, Florida. It was in force for 6 hr. 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
- May 20, 2017, 11:30 PM CDT (04:30 UTC)
- Expired
- May 21, 2017, 5:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Okaloosa County, FL, Santa Rosa County, FL
The radar
The Eglin Afb radar (KEVX), 60 km from the middle of the area, began a volume at 04:29 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 21, 12:27 AM CDT | FLASH FLOOD | 2 Sse Crestview, FL | FLASH FLOODING REPORTED AT THE INTERSECTION OF LIVE OAK CHURCH RD AND JOHN KING RD IN CRESTVIEW. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 4.5 hours before the alert went out and 216 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
- 48 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 1610 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
258
WGUS54 KMOB 210430
FFWMOB
FLC091-113-211030-
/O.NEW.KMOB.FF.W.0017.170521T0430Z-170521T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1130 PM CDT SAT MAY 20 2017
The National Weather Service in Mobile has issued a
* Flash Flood Warning for...
Okaloosa County in northwestern Florida...
Southeastern Santa Rosa County in northwestern Florida...
* Until 530 AM CDT Sunday
* At 1129 PM CDT, Doppler radar indicated thunderstorms producing
very heavy rain across the warned area. Doppler radar estimates
that 2 to 4 inches of rain with locally higher amounts have
fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Wright, Fort Walton Beach, Crestview, Niceville, Destin, Eglin AFB,
Valparaiso, Mary Esther, Ocean City, Lake Lorraine, Baker,
Shalimar, Laurel Hill, Cinco Bayou, Navarre Beach and Eglin Air
Force Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3035 8691 3058 8682 3098 8670 3099 8639
3046 8639 3048 8632 3039 8633 3040 8639
3038 8640 3038 8650 3034 8650
$$1 follow-up statement
913
WGUS74 KMOB 210550
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
1250 AM CDT SUN MAY 21 2017
FLC091-113-211030-
/O.CON.KMOB.FF.W.0017.000000T0000Z-170521T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Okaloosa FL-Santa Rosa FL-
1250 AM CDT SUN MAY 21 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM CDT FOR
OKALOOSA AND SOUTHEASTERN SANTA ROSA COUNTIES...
At 1207 AM CDT, the Okaloosa county Sheriff's Office reported 3 feet
of water over the roadway on Okaloosa Island west of Destin.
At 1227 AM CDT, the Okaloosa county Sheriff's Office reported flash
flooding at the intersection of Live Oak Church Road and John King
Road in Crestview.
At 1245 AM CDT, Doppler radar indicated moderate rain still falling
in the warned area behind the line of stronger storms that have
moved east. Observer reports and doppler radar indicate that 3 to 6
inches of rain, with localized higher amounts have fallen over much
of the warned area.
Some locations that will continue to experience flooding include...
Wright, Fort Walton Beach, Crestview, Niceville, Destin, Eglin AFB,
Valparaiso, Mary Esther, Ocean City, Lake Lorraine, Baker, Shalimar,
Laurel Hill, Cinco Bayou, Navarre Beach and Eglin Air Force Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3035 8691 3058 8682 3098 8670 3099 8639
3046 8639 3048 8632 3039 8633 3040 8639
3038 8640 3038 8650 3034 8650
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 8:09 PM CDT | Special Weather Statement | MOB | Escambia | 51 min |
| May 20, 8:56 PM CDT | Flash Flood Watch | MOB | Escambia, Okaloosa, Santa Rosa | 7 hr |
| May 20, 9:02 PM CDT | Flash Flood Warning | MOB | Escambia | 6 hr |
| May 20, 9:07 PM CDT | Special Weather Statement | MOB | Escambia, Santa Rosa | 53 min |
| May 20, 10:17 PM CDT | Severe Thunderstorm Warning | MOB | Okaloosa | 43 min |
| May 20, 10:21 PM CDT | Areal Flood Advisory | MOB | Escambia, Okaloosa, Santa Rosa | 3 hr |
| May 20, 10:25 PM CDT | Special Weather Statement | MOB | Okaloosa, Santa Rosa | 65 min |
| May 20, 10:58 PM CDT | Severe Thunderstorm Warning | MOB | Okaloosa | 47 min |
| May 20, 11:14 PM CDT | Areal Flood Advisory | MOB | Okaloosa | 3 hr |
| May 21, 3:21 PM CDT | Flash Flood Watch | MOB | Escambia, Okaloosa, Santa Rosa | 47 hr |
Nearby
Flash Flood Warnings in Florida, 2017Every flash flood 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.