Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 213, NWS Norman, OK

May 18, 2001Johnston County, Pontotoc County, Seminole County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 18, 2001, 4:03 AM CDT for Johnston County, Pontotoc County, Seminole County, Oklahoma. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 18, 2001, 4:03 AM CDT (09:03 UTC)
Expired: May 18, 2001, 5:00 AM CDT
In force: 57 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Johnston County, OK, Pontotoc County, OK, Seminole County, OK

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 18, 3:30 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 9.1 hours before the alert went out and 87 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: 2992 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1092 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.5

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 May 18, 3:30 AM CDT, 33 minutes earlier.

Area forecast discussion, May 18, 3:30 AM CDT, 33 minutes before

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In the hours before

Local storm report, May 18, 2:11 AM CDT, 1 hour 52 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
211 AM CDT FRI MAY 18 2001

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

0110 AM    3 W GOULD                 OK   71 MPH WIND GUST
05/18/01   HARMON                         REPORTED VIA OKLAHOMA
                                          MESONET

0135 AM    4 SE HOBART               OK   73 MYPH WIND GUST
05/18/01   KIOWA                          REPORTED VIA OKLAHOMA
                                          MESONET

Local storm report, May 18, 2:16 AM CDT, 1 hour 47 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
216 AM CDT FRI MAY 18 2001

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

0105 AM    3 W GOULD                 OK   63 MPH WIND GUST
05/18/01   HARMON                         REPORTED VIA OKLAHOMA
                                          MESONET

0140 AM    4 SE HOBART               OK   68 MiPH WIND GUST
05/18/01   KIOWA                          REPORTED VIA OKLAHOMA
                                          MESONET

Local storm report, May 18, 2:30 AM CDT, 1 hour 33 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
230 AM CDT FRI MAY 18 2001

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

0155 AM    FREDERICK                 OK   72 MPH WIND GUST
05/18/01   TILLMAN                        REPORTED BY COUNTY EM

0155 AM    4 S TIPTON                OK   59 MPH WIND GUST
05/18/01   TILLMAN                        REPORTED VIA OKLAHOMA
                                          MESONET

0204 AM    FREDERICK                 OK   84 MPH WIND GUST
05/18/01   TILLMAN                        REPORTED BY COUNTY EM

0204 AM    FREDERICK                 OK   WIND DAMAGE
05/18/01   TILLMAN                        ELECTRIC PWR POLES DOWN
                                          REPORTED BY COUNTY EM

Local storm report, May 18, 2:59 AM CDT, 1 hour 4 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
259 AM CDT FRI MAY 18 2001

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

0205 AM    4 NNW FORT COBB           OK   65 MPH WIND GUST
05/18/01   CADDO                          REPORTED VIA OKLAHOMA
                                          MESONET

0215 AM    3 W MEDICINE PARK         OK   73 MPH WIND GUST
05/18/01   COMANCHE                       REPORTED VIA OKLAHOMA
                                          MESONET

Local storm report, May 18, 3:14 AM CDT, 49 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
314 AM CDT FRI MAY 18 2001

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

0225 AM    3 W MEDICINE PARK         OK   58 MPH WIND GUST
05/18/01   COMANCHE                       REPORTED VIA OKLAHOMA
                                          MESONET

0225 AM    3 W GRANDFIELD            OK   63 MPH WIND GUST
05/18/01   TILLMAN                        REPORTED VIA OKLAHOMA
                                          MESONET

0240 AM    1 NW WALTERS              OK   64 MPH WIND GUST
05/18/01   COTTON                         REPORTED VIA OKLAHOMA

0308 AM    HENNESSEY                 OK   WIND DAMAGE
05/18/01   KINGFISHER                     TREE LIMBS DOWN

Local storm report, May 18, 3:45 AM CDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Beckham	43 min
May 17, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Beckham	47 min
May 17, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	46 min
May 17, 11:38 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	52 min
May 18, 12:18 AM CDT	Severe Thunderstorm Warning	OUN	Jackson	42 min
May 18, 1:30 AM CDT	Severe Thunderstorm Warning	OUN	Jackson	45 min
May 18, 1:46 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	44 min
May 18, 1:51 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Kiowa	39 min
May 18, 2:18 AM CDT	Severe Thunderstorm Warning	OUN	Cotton	42 min
May 18, 2:30 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche	45 min
May 18, 2:37 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady	53 min
May 18, 2:37 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	53 min
May 18, 2:41 AM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	64 min
May 18, 2:59 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Logan, Oklahoma	61 min
May 18, 2:59 AM CDT	Severe Thunderstorm Warning	OUN	McClain	61 min
May 18, 3:17 AM CDT	Severe Thunderstorm Warning	OUN	Garvin	43 min
May 18, 3:22 AM CDT	Flash Flood Warning	OUN	Kingfisher	3 hr
May 18, 3:27 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Murray	48 min
May 18, 3:37 AM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	53 min
May 18, 4:22 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln	38 min
May 18, 4:35 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes	55 min
May 18, 4:59 AM CDT	Severe Thunderstorm Warning	OUN	Atoka	61 min
May 17, 9:46 PM CDT	Severe Thunderstorm Warning	OUN	Foard	44 min
May 17, 11:38 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	52 min
May 18, 2:41 AM CDT	Severe Thunderstorm Warning	OUN	Clay	64 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; the sounding from the Mesonet's radiosonde archive.