Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 15, NWS Norman, OK

February 24, 2001Greer County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Feb 24, 2001, 2:10 AM CST for Greer County, Oklahoma. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Feb 24, 2001, 2:10 AM CST (08:10 UTC)
Expired: Feb 24, 2001, 3:00 AM CST
In force: 50 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Greer County, OK

What was reported inside it

Time	Report	Where	Remark
Feb 24, 2:56 AM CST	Hail 0.88	Mangum, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 24, 12:30 AM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 8.2 hours before the alert went out and 197 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: 174 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Feb 23, 9:25 PM CST, 4 hours 45 minutes earlier.

Area forecast discussion, Feb 23, 9:25 PM CST, 4 hours 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
925 PM CST FRI FEB 23 2001

TWO MAIN CONCERNS TONIGHT. ONE BEING THE FLOODING POTENTIAL ACROSS
SOUTH CENTRAL AND SOUTHEAST SECTIONS OF FORECAST AREA. CURRENT BATCH
OF RAIN CONTINUES TO TRAIN SOMEWHAT...BUT PRECIP AMOUNTS NOT GETTING
OUT OF HAND. PROBING CALLS TO AFFECT AREAS NOT YIELDING SIGNIFICANT
PROBLEMS WITH JUST SOME HIGH WATER IN NORMALLY POOR DRAINED/LOW
LYING AREAS. STRONGLY WORDED NOWS AND A URBAN/SMALL STREAM ADVISORY
WILL SUFFICE FOR THE TIME BEING. AS FOR THE FLOOD WATCH CURRENTLY IN
EFFECT...WILL NOT TAMPER WITH IT. APPEARS THAT MOST OF THE RAIN THAT
WILL FALL ACROSS THE WATCH AREA HAS ALREADY OCCURRED...WITH
AFOREMENTIONED ACTIVITY. ANY ACTIVITY THAT COMES ROARING THROUGH
HERE LATER TONIGHT WILL BE FAST MOVING AND RAINFALL AMOUNTS ARE NOT
EXPECTED TO BE EXCESSIVE. HOWEVER...WITH THAT SAID...WILL NOT DROP
WATCH AND WILL NOT ADD ANY COUNTIES. AREAS JUST NORTH OF WATCH DID
RECEIVE SOME DECENT RAINFALL LATE THIS AFTERNOON AND EARLY
EVENING...BUT ANTICEDENT SOIL CONDITIONS ARE MORE FORGIVING.

SECOND CONCERN IS ASSOCIATED WITH POTENTIAL FOR CONVECTIVE ACTIVITY
OVERNIGHT AND EARLY SATURDAY. SO FAR...THINGS ARE QUIET...AND ALL OF
THE LATEST SHORT-TERM/MESOSCALE MODELS INDICATE THAT NOTHING OF
SIGNIFICANCE WILL OCCUR. COLD FRONT/DRY LINE COMBO WILL BEGIN TO
MOVE RAPIDLY EASTWARD ACROSS WEST TEXAS AFTER MIDNIGHT...
ENCOUNTERING BETTER MOISTURE. WITH SIGNIFICANT SHEAR PROFILE...
INCLUDING 120+ KNOT UPPER JET SEGMENT...AMPLE LARGE SCALE FORCING
WILL BE IN PLACE FOR CONVECTIVE DEVEOPMENT ALONG/AHEAD OF COLD
FRONT/DRY LINE. CURRENT FORECAST HAS THIS ALL TAKEN CARE OF. WILL
MAKE SOME TEMPORAL WORDING CHANGES BUT NO SIG CHANGES EXPECTED TO
CONVECTIVE TRENDS.

WILL HAVE IN INCREASE MIN TEMPERATURES ACROSS PORTIONS OF WEST
CENTRAL AND SOUTH CENTRAL OKLAHOMA. WITH AREAS OF RAIN MOVING
THROUGH...ALONG WITH INCREASING SURFACE WIND...FOG PROBLEMS HAVE
DECREASED AND DO NOT ANTICIPATE DENSE FOG ADVISORY OVERNIGHT.

FCSTID = 11

.OUN...
OK...FLOOD WATCH THROUGH SATURDAY MORNING
     OKZ023-027>032-035>048-050>052.
TX...FLOOD WATCH THROUGH TOMORROW MORNING TXZ085-086-088>090.

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 2:10 AM CST	Severe Thunderstorm Warning	OUN	Harmon	50 min
Feb 24, 3:53 AM CST	Severe Thunderstorm Warning	OUN	Jackson	52 min
Feb 24, 5:12 AM CST	Severe Thunderstorm Warning	OUN	Kay, Noble	48 min
Feb 24, 9:28 AM CST	Severe Thunderstorm Warning	OUN	Lincoln	47 min
Feb 24, 9:46 AM CST	Severe Thunderstorm Warning	OUN	Coal	44 min
Feb 24, 10:01 AM CST	Severe Thunderstorm Warning	OUN	Love, Marshall	44 min
Feb 24, 10:18 AM CST	Severe Thunderstorm Warning	OUN	Johnston, Pontotoc	42 min
Feb 24, 10:49 AM CST	Severe Thunderstorm Warning	OUN	Bryan, Marshall	41 min
Feb 24, 10:57 AM CST	Severe Thunderstorm Warning	OUN	Atoka, Coal	48 min
Feb 24, 8:11 AM CST	Severe Thunderstorm Warning	OUN	Archer	49 min
Feb 24, 8:32 AM CST	Severe Thunderstorm Warning	OUN	Clay	43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.