Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 76, NWS Charleston, SC

May 22, 2012Berkeley County, Charleston County, Dorchester County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at May 22, 2012, 5:19 PM EDT for Berkeley County, Charleston County, Dorchester County, South Carolina. It was in force for 56 min. 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 22, 2012, 5:19 PM EDT (21:19 UTC)
Expired: May 22, 2012, 6:15 PM EDT
In force: 56 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon

Counties Berkeley County, SC, Charleston County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 135 km from the middle of the area, began a volume at 21:19 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 22, 5:20 PM EDT	HAIL 1	1 Nnw Archdale, SC	SPOTTER REPORTED QUARTER SIZE HAIL AT THE INTERSECTION OF ASHLEY PHOSPHATE ROAD AND DORCHESTER ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 22, 3:32 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.3 hours before the alert went out and 39 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: 831 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1209 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 49 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.

063 
WUUS52 KCHS 222119
SVRCHS
SCC015-019-035-222215-
/O.NEW.KCHS.SV.W.0076.120522T2119Z-120522T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
519 PM EDT TUE MAY 22 2012

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BERKELEY COUNTY IN SOUTHEAST SOUTH CAROLINA...
  NORTHEASTERN CHARLESTON COUNTY IN SOUTHEAST SOUTH CAROLINA...
  SOUTHEASTERN DORCHESTER COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 615 PM EDT

* AT 519 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...NEAR ARCHDALE...MOVING NORTHEAST AT 25 MPH.

  PREPARE NOW FOR THE FOLLOWING HAZARDS...
  DAMAGING WINDS IN EXCESS OF 60 MPH...
  HAIL UP TO QUARTER SIZE...

* SOME LOCATIONS IN THE WARNING INCLUDE...
  ARCHDALE...CHARLESTON AIRPORT...HANAHAN...COLLEGE PARK...GOOSE
  CREEK...CROWFIELD PLANTATION...NAVAL WEAPONS STATION CHARLESTON...
  HUGER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE SHELTER AS THUNDERSTORMS APPROACH.

REPORT HAIL...DOWNED TREES...LIMBS...AND POWER LINES DIRECTLY TO THE
CHARLESTON NATIONAL WEATHER SERVICE AT 1-888-383-2024...WHEN IT IS
SAFE TO DO SO.

&&

LAT...LON 3281 8014 3293 8021 3334 7976 3332 7974
      3332 7970 3330 7967 3329 7959 3325 7953
      3325 7951 3321 7943 3318 7939
TIME...MOT...LOC 2119Z 225DEG 21KT 3293 8008

$$

1 follow-up statement

537 
WWUS52 KCHS 222141
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
541 PM EDT TUE MAY 22 2012

SCC035-222150-
/O.CAN.KCHS.SV.W.0076.000000T0000Z-120522T2215Z/
DORCHESTER SC-
541 PM EDT TUE MAY 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DORCHESTER COUNTY
HAS BEEN CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA.

LAT...LON 3293 7989 3308 8004 3334 7976 3332 7974
      3332 7970 3330 7967 3329 7959 3325 7953
      3325 7951 3321 7943 3318 7939
TIME...MOT...LOC 2140Z 233DEG 13KT 3327 7957 3295 8004

$$

SCC015-019-222215-
/O.CON.KCHS.SV.W.0076.000000T0000Z-120522T2215Z/
CHARLESTON SC-BERKELEY SC-
541 PM EDT TUE MAY 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR EASTERN BERKELEY AND NORTHEASTERN CHARLESTON COUNTIES...

AT 540 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A LINE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM
SIMMONSVILLE TO 8 MILES WEST OF BUSHY PARK...MOVING NORTHEAST AT 15
MPH.

PREPARE NOW FOR THE FOLLOWING HAZARDS...
DAMAGING WINDS IN EXCESS OF 60 MPH...
HAIL UP TO QUARTER SIZE...

AT 520 PM EDT...THE PUBLIC REPORTED ONE INCH HAIL NEAR ARCHDALE.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...HAMPTON
PLANTATION STATE PARK...HUGER AND JAMESTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA.

&&

LAT...LON 3293 7989 3308 8004 3334 7976 3332 7974
      3332 7970 3330 7967 3329 7959 3325 7953
      3325 7951 3321 7943 3318 7939
TIME...MOT...LOC 2140Z 233DEG 13KT 3327 7957 3295 8004

$$

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 2:57 PM EDT	Special Weather Statement	CHS	Berkeley	33 min
May 22, 3:34 PM EDT	Special Weather Statement	CHS	Berkeley	26 min
May 22, 3:44 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	61 min
May 22, 5:06 PM EDT	Special Weather Statement	CHS	Hampton	24 min
May 22, 5:14 PM EDT	Special Weather Statement	CHS	Charleston	31 min
May 22, 5:28 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	45 min
May 22, 6:16 PM EDT	Special Weather Statement	CHS	Berkeley	59 min
May 22, 6:21 PM EDT	Special Weather Statement	CHS	Colleton	24 min
May 22, 6:33 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Charleston, Colleton, Dorchester	57 min
May 22, 6:51 PM EDT	Special Weather Statement	CHS	Berkeley	54 min
May 22, 7:00 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Dorchester	60 min
May 22, 7:20 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Dorchester	55 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2012 Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.