Alert archive / Arkansas / Special Weather Statements in 2009

Special Weather Statement, NWS Tulsa, OK

July 27, 2009Washington County, Arkansas

NWS Tulsa, OK issued this special weather statement at Jul 27, 2009, 3:03 PM CDT for Washington County, Arkansas. It was in force for 27 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: Jul 27, 2009, 3:03 PM CDT (20:03 UTC)
Expired: Jul 27, 2009, 3:30 PM CDT
In force: 27 min
Issued by: NWS Tulsa, OK

County Washington County, AR

The radar

The Western Arkansas radar (KSRX), 98 km from the middle of the area, began a volume at 20:07 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

Springfield, MO (KSGF), launched 12:00Z, 8.1 hours before the alert went out and 88 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: 550 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Jul 27, 12:26 PM CDT, 2 hours 37 minutes earlier.

Area forecast discussion, Jul 27, 12:26 PM CDT, 2 hours 37 minutes before

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Hazardous weather outlook, Jul 27, 1:02 PM CDT, 2 hours 1 minute before

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In the hours before

Special weather statement, Jul 27, 2:56 PM CDT, 7 minutes before

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Special weather statement, Jul 27, 3:01 PM CDT, 2 minutes before

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Special weather statement, Jul 27, 3:03 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
303 PM CDT MON JUL 27 2009

ARZ010-272030-
WASHINGTON AR-
303 PM CDT MON JUL 27 2009

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 330 PM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHWEST ARKANSAS
     NORTHEASTERN WASHINGTON

AT 303 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES
SOUTH OF SONORA...MOVING NORTH AT 10 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...SHADY GROVE...MAYFIELD...
SPRINGDALE...GOSHEN AND SONORA.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.

LAT...LON 3620 9417 3621 9390 3603 9399 3604 9414
TIME...MOT...LOC 2003Z 185DEG 7KT 3612 9406

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 9:47 AM CDT	Areal Flood Advisory	TSA	Pittsburg	58 min
Jul 27, 1:59 PM CDT	Areal Flood Advisory	TSA	Latimer, Pittsburg, Pushmataha	2 hr
Jul 27, 3:37 PM CDT	Special Weather Statement	TSA	Adair	23 min
Jul 27, 4:45 PM CDT	Special Weather Statement	TSA	Delaware	30 min
Jul 27, 2:56 PM CDT	Special Weather Statement	TSA	Crawford	34 min
Jul 27, 3:01 PM CDT	Special Weather Statement	TSA	Franklin	29 min
Jul 27, 3:48 PM CDT	Special Weather Statement	TSA	Benton	27 min
Jul 27, 5:15 PM CDT	Special Weather Statement	TSA	Washington	30 min
Jul 27, 5:33 PM CDT	Special Weather Statement	TSA	Carroll	27 min

Nearby

Special Weather Statements in Arkansas, 2009 Every special weather statement in 2009

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.