Alert archive / Mississippi / Flash Flood Warnings in 2012

Flash Flood Warning 36, NWS Memphis, TN

July 17, 2012Yalobusha County, Mississippi

NWS Memphis, TN issued this flash flood warning at Jul 17, 2012, 2:55 PM CDT for Yalobusha County, Mississippi. It was in force for 49 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 17, 2012, 2:55 PM CDT (19:55 UTC)
Expired: Jul 17, 2012, 3:44 PM CDT
In force: 49 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

County Yalobusha County, MS

The radar

The Columbus AFB radar (KGWX), 127 km from the middle of the area, began a volume at 19:55 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

Little Rock, AR (KLZK), launched 12:00Z, 7.9 hours before the alert went out and 95 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: 1224 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1051 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: -37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

454 
WGUS54 KMEG 171955
FFWMEG
MSC161-172300-
/O.NEW.KMEG.FF.W.0036.120717T1955Z-120717T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
255 PM CDT TUE JUL 17 2012

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL YALOBUSHA COUNTY IN NORTHWEST MISSISSIPPI...

* UNTIL 600 PM CDT

* AT 256 PM CDT...DOPPLER RADAR ESTIMATES 2 TO 4 INCHES OF RAINFALL
  HAS OCCURRED OVER THE PAST HOUR. SHOWERS AND THUNDERSTORMS WILL
  PRODUCE AN ADDITIONAL 1 TO 3 INCHES OF RAIN OVER THE NEXT HOUR.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO COFFEEVILLE
  AND VELMA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT FLASH FLOODING ONLY...CALL 1 800 4 3 2 0 8 7 5.

&&

LAT...LON 3400 8975 3406 8971 3408 8964 3395 8957
      3391 8975

$$

BORGHOFF

1 follow-up statement

423 
WGUS74 KMEG 172044
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
344 PM CDT TUE JUL 17 2012

MSC161-172054-
/O.CAN.KMEG.FF.W.0036.000000T0000Z-120717T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YALOBUSHA MS-
344 PM CDT TUE JUL 17 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL YALOBUSHA
COUNTY...

THE HEAVY RAINFALL WHICH PROMPTED THE WARNING HAS DIMINISHED ACROSS
THE WARNED AREA. THUS THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

.STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT SEVERE WEATHER ONLY...CALL 1 800 4 3 2 0 8 7 5.

LAT...LON 3400 8975 3406 8971 3408 8964 3395 8957
      3391 8975

$$

BORGHOFF

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 17, 2:28 PM CDT	Special Weather Statement	MEG	Yalobusha	32 min

Nearby

Flash Flood Warnings in Mississippi, 2012 Every flash flood warning in 2012

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.