Alert archive / Mississippi / Flash Flood Warnings in 2011

Flash Flood Warning 1, NWS Mobile, AL

March 5, 2011Perry County, Mississippi

NWS Mobile, AL issued this flash flood warning at Mar 5, 2011, 10:42 AM CST for Perry County, Mississippi. 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: Mar 5, 2011, 10:42 AM CST (16:42 UTC)
Expired: Mar 5, 2011, 12:45 PM CST
In force: 2 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Perry County, MS

The radar

The Mobile radar (KMOB), 77 km from the middle of the area, began a volume at 16:43 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, 4.7 hours before the alert went out and 115 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: 960 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 451 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

431 
WGUS54 KMOB 051642
FFWMOB
MSC111-051845-
/O.NEW.KMOB.FF.W.0001.110305T1642Z-110305T1845Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1042 AM CST SAT MAR 5 2011

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL PERRY COUNTY IN SOUTHEAST MISSISSIPPI...

* UNTIL 1245 PM CST

* AT 1033 AM CST...NATIONAL WEATHER SERVICE RADAR INDICATED THAT 3
  TO 4 INCHES OF RAIN HAS FALLEN OVER SOUTH CENTRAL PERRY COUNTY AND
  AN ADDITIONAL INCH OF RAIN IS EXPECTED AS THUNDERSTORMS CONTINUE
  TO MOVE OVER THE AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OAK GROVE
  AND PROGRESS

TO REPORT FLASH FLOODING TO YOUR NATIONAL WEATHER SERVICE...CALL TOLL
FREE AT 1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3109 8894 3112 8883 3095 8893 3096 8902

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 5, 9:15 AM CST	Severe Thunderstorm Warning	MOB	George, Perry, Stone	26 min
Mar 5, 9:26 AM CST	Areal Flood Advisory	MOB	Stone	2 hr
Mar 5, 10:04 AM CST	Tornado Warning	MOB	Greene, Perry	41 min
Mar 5, 10:46 AM CST	Tornado Warning	MOB	Greene	44 min
Mar 5, 11:26 AM CST	Areal Flood Advisory	MOB	Greene	2 hr
Mar 5, 11:54 AM CST	Severe Thunderstorm Warning	MOB	Greene	50 min
Mar 5, 11:58 AM CST	Areal Flood Advisory	MOB	Greene	2 hr
Mar 5, 12:50 PM CST	Flash Flood Warning	MOB	Greene, Perry	3 hr
Mar 5, 1:16 PM CST	Flash Flood Watch	MOB	George, Greene, Perry, Stone, Wayne	6 hr
Mar 5, 1:39 PM CST	Areal Flood Advisory	MOB	Greene, Perry, Wayne	2 hr
Mar 5, 2:50 PM CST	Flash Flood Warning	MOB	Stone	4 hr
Mar 5, 3:23 PM CST	Flash Flood Warning	MOB	Greene, Perry, Wayne	3 hr
Mar 5, 3:48 PM CST	Flash Flood Warning	MOB	Greene, Perry	3 hr
Mar 5, 4:17 PM CST	Areal Flood Advisory	MOB	George	118 min

Nearby

Flash Flood Warnings in Mississippi, 2011 Every flash flood warning in 2011

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.