Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 523, NWS Norman, OK

August 25, 2001Cleveland County, Pottawatomie County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 25, 2001, 9:01 PM CDT for Cleveland County, Pottawatomie County, Oklahoma. It was in force for 44 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: Aug 25, 2001, 9:01 PM CDT (02:01 UTC)
Expired: Aug 25, 2001, 9:45 PM CDT
In force: 44 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cleveland County, OK, Pottawatomie County, OK

The radar

The Norman radar (KTLX), 19 km from the middle of the area, began a volume at 02:01 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
Aug 25, 9:30 PM CDT	Thunderstorm Wind	Norman, OK	Large tree limbs were downed.

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
Aug 25, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.0 hours before the alert went out and 24 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: 1849 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 2350 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 25, 8:05 PM CDT, 56 minutes earlier.

Area forecast discussion, Aug 25, 8:05 PM CDT, 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
805 PM CDT SAT AUG 25 2001

ZONES UPDATED TO REFLECT LATEST RADAR TRENDS. STORMS FOCUSING ON
NE-SW FRONT MOVING SLOWLY SOUTH INTO CENTRAL AND WESTERN OKLAHOMA.
WEAK SHEAR AND MDT INSTABILITY SUGGEST MAIN THREAT WILL BE LOCALLY
HEAVY RAINFALL...WIND AND MARGINAL HAIL NEXT FEW HOURS.

OTHERWISE NO SIG CHANGES.   ..16..

.OUN...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Aug 25, 7:31 PM CDT, 1 hour 30 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
731 PM CDT SAT AUG 25 2001

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0730 PM    9SW TANGIER               OK   80 MPH WIND GUST
08/25/01   WOODWARD                       .88 INCH HAIL

CW

Local storm report, Aug 25, 8:06 PM CDT, 55 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
806 PM CDT SAT AUG 25 2001

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0759 PM    HWY 66 & HWY 177          OK   75 MPH WIND GUST
08/25/01   LINCOLN                        BY HAM SPOTTER

CW

Local storm report, Aug 25, 8:10 PM CDT, 51 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
810 PM CDT SAT AUG 25 2001

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0810 PM    N OKLAHOMA CITY           OK   .88 INCH HAIL
08/25/01   OKLAHOMA                       BRITTON & BROADWAY
                                          EXTENSION BY FIRE DPT.

CW

Local storm report, Aug 25, 8:19 PM CDT, 42 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
819 PM CDT SAT AUG 25 2001

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0745 PM    WELLSTON                  OK   WIND DAMAGE
08/25/01   LINCOLN                        POWER LINES DOWN. 2 TO 3
                                          INCH TREES LIMBS BROKE.

CW

Local storm report, Aug 25, 8:20 PM CDT, 41 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
820 PM CDT SAT AUG 25 2001

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0805 AM    OKLAHOMA CITY             OK   .88 INCH HAIL
08/25/01   OKLAHOMA                       WISHERE & KELLY BY TV STN.

CW

Local storm report, Aug 25, 8:47 PM CDT, 14 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
847 PM CDT SAT AUG 25 2001

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0836 PM    NICHOLS HILLS             OK   .88 INCH HAIL
08/25/01   OKLAHOMA                       BY HAM

CW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan	60 min
Aug 25, 7:39 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	66 min
Aug 25, 7:58 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	62 min
Aug 25, 8:34 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Major	41 min
Aug 25, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Oklahoma	60 min
Aug 25, 9:27 PM CDT	Severe Thunderstorm Warning	OUN	Grady	63 min
Aug 25, 9:38 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	67 min
Aug 25, 9:52 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma	38 min
Aug 25, 10:06 PM CDT	Severe Thunderstorm Warning	OUN	McClain	54 min
Aug 25, 10:24 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	66 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; radar from the NEXRAD Level II archive.