Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

March 18, 2012Foard County, Texas

NWS Norman, OK issued this special weather statement at Mar 18, 2012, 4:13 PM CDT for Foard County, Texas. It was in force for 32 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: Mar 18, 2012, 4:13 PM CDT (21:13 UTC)
Expired: Mar 18, 2012, 4:45 PM CDT
In force: 32 min
Issued by: NWS Norman, OK

County Foard County, TX

The radar

The Altus AFB radar (KFDR), 90 km from the middle of the area, began a volume at 21:14 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.2 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.

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: 1066 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this special weather statement went out at Mar 18, 3:37 PM CDT, 36 minutes earlier.

Area forecast discussion, Mar 18, 3:37 PM CDT, 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
337 PM CDT SUN MAR 18 2012

.DISCUSSION...
SEVERE THUNDERSTORM POTENTIAL TONIGHT INTO MONDAY IS THE
MAIN CONCERN.

THE SEVERE THUNDERSTORM THREAT IS INCREASING ACROSS WEST OKLAHOMA
WITH THE BEST CHANCES FOR SEVERE BETWEEN 6 PM AND 10 PM WEST OF A
SEYMOUR TEXAS TO WOODWARD OKLAHOMA LINE. LARGE HAIL UP TO GOLF
BALLS MAY BE THE MAIN HAZARD ALONG WITH DAMAGING WIND GUSTS UP TO
65 MPH...THOUGH CANNOT RULE OUT A TORNADO IN THESE AREAS DUE TO
INCREASING LOW LEVEL SRH VALUES AND LCLS AROUND 4000 FT AGL.
STORMS WILL LIKELY BEGIN AS DISCRETE SUPERCELLS NEAR THE DRYLINE
ACROSS JUST WEST OF THE FORECAST AREA AND PROBABLY FORM A LINE
AFTER MIDNIGHT AS THEY MOVE NORTHEAST.

AFTER MIDNIGHT TONIGHT INTO MONDAY...THERE REMAINS A LOWER CHANCE
FOR SEVERE WEATHER ACROSS THE REST OF THE AREA. LATEST MODELS
HINTED THAT A SLOW MOVING SQUALL LINE MAY DEVELOP AND PRODUCE
SOME HAIL AND GUSTY WINDS...THOUGH A STABILIZING BOUNDARY LAYER
MAY REDUCE THE WIND THREAT LATE TONIGHT INTO MONDAY MORNING.
DEPENDING ON THE SPEED OF THE LINE...LOCALLY HEAVY RAINFALL WILL
BE POSSIBLE WITH THE COMBINATION OF ANOMOLOUSLY HIGH PRECIPITABLE
WATER VALUES ALONG WITH A STRONG LOW LEVEL JET. ONE TO THREE
INCHES OF RAINFALL MAY OCCUR OVER MUCH OF THE AREA WITH LOCALLY
HIGHER AMOUNTS... ESPECIALLY EAST OF A PONCA CITY TO WICHITA FALLS
LINE. CLOUDS SHOULD KEEP TEMPERATURES DOWN ON MONDAY AND LOWERED
THEM ACCORDINGLY.

MONDAY NIGHT THROUGH TUESDAY...SHOWERS AND STORMS MAY LINGER
OVER THE AREA...ESPECIALLY EAST OF I-35. NO SEVERE STORMS ARE
EXPECTED...THOUGH HEAVY RAINFALL MAY LINGER ACROSS THE FAR
SOUTHEAST PART OF THE AREA NEAR DURANT OKLAHOMA.

TUESDAY NIGHT THROUGH THURSDAY...MID/UPPER LOW WILL LINGER NEAR
THE AREA BRINGING ADDITIONAL RAIN CHANCES AND SEASONABLY COOL
WEATHER.

BEYOND THURSDAY...WARMER AND DRIER CONDITIONS ARE EXPECTED TO
RETURN.

17

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  59  68  49  61 /  70  90  60  60
HOBART OK         55  68  46  63 /  80  50  20  40
WICHITA FALLS TX  60  70  49  68 /  60  80  60  50
GAGE OK           52  66  38  61 /  70  20  10  20
PONCA CITY OK     63  67  50  58 /  70  80  60  70
DURANT OK         63  71  55  65 /  40 100  90  90

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...WIND ADVISORY UNTIL 1 AM CDT MONDAY FOR OKZ004>006-009>011-
     014>016.

TX...NONE.
&&

22/17

Hazardous weather outlook, Mar 18, 12:11 PM CDT, 4 hours 2 minutes before

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In the hours before

Special weather statement, Mar 18, 4:13 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
413 PM CDT SUN MAR 18 2012

TXZ083-084-087-182145-
HARDEMAN TX-FOARD TX-KNOX TX-
413 PM CDT SUN MAR 18 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL HARDEMAN...FOARD
AND NORTHWESTERN KNOX COUNTIES UNTIL 445 PM CDT...

AT 409 PM CDT...A SEVERE THUNDERSTORM 13 MILES WEST OF TRUSCOTT...
MOVING NORTHEAST AT 50 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
CROWELL...MARGARET AND COPPERS BREAK STATE PARK.

MONITOR THE SITUATION CLOSELY. BE READY TO ACT QUICKLY IF A
WARNING IS ISSUED OR IF STORMS THREATEN YOU.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SUNDAY
AFTERNOON FOR NORTH CENTRAL TEXAS.

LAT...LON 3433 9981 3409 9954 3365 9998 3383 9999
      3384 10004
TIME...MOT...LOC 2109Z 240DEG 49KT 3373 10004

WR

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 18, 4:02 AM CDT	Wind Advisory	OUN	Alfalfa, Custer, Dewey, Ellis, Harper, Major and 3 more	18 hr
Mar 18, 4:39 PM CDT	Special Weather Statement	OUN	Harmon	36 min
Mar 18, 4:55 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	65 min
Mar 18, 5:58 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	62 min
Mar 18, 6:26 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	64 min
Mar 18, 6:31 PM CDT	Special Weather Statement	OUN	Roger Mills	29 min
Mar 18, 6:54 PM CDT	Tornado Warning	OUN	Greer	36 min
Mar 18, 4:36 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Knox	54 min
Mar 18, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	64 min
Mar 18, 5:28 PM CDT	Special Weather Statement	OUN	Knox	32 min
Mar 18, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Knox	54 min
Mar 18, 5:46 PM CDT	Tornado Warning	OUN	Foard	29 min
Mar 18, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	66 min

Nearby

Special Weather Statements in Texas, 2012 Every special weather statement 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.