Alert archive / Arkansas / Special Weather Statements in 2009
Special Weather Statement, NWS Tulsa, OK
NWS Tulsa, OK issued this special weather statement at Jul 20, 2009, 12:36 PM CDT for Madison County, Arkansas. It was in force for 39 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 20, 2009, 12:36 PM CDT (17:36 UTC)
- Expired
- Jul 20, 2009, 1:15 PM CDT
- In force
- 39 min
- Issued by
- NWS Tulsa, OK
County Madison County, AR
The radar
The Western Arkansas radar (KSRX), 96 km from the middle of the area, began a volume at 17:38 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, 5.6 hours before the alert went out and 99 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.
- Mixed-layer CAPE
- 428 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 790 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 20, 12:29 PM CDT, 7 minutes earlier.
Area forecast discussion, Jul 20, 12:29 PM CDT, 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1229 PM CDT MON JUL 20 2009 .DISCUSSION... ISOLATED THUNDERSTORMS HAVE DEVELOPED ACROSS NORTHWEST ARKANSAS THIS AFTERNOON THEREFORE...HAVE ADDED VCTS GROUP TO KXNA AND KFYV FOR THE AFTERNOON. MORE THUNDERSTORMS ARE EXPECTED TO DEVELOP LATER THIS AFTERNOON AND TONIGHT WITH SEVERAL OUTFLOW BOUNDARIES AND A WEAK FRONTAL BOUNDARY DRAPED ACROSS THE AREA. A THUNDERSTORM COMPLEX IS ALSO EXPECTED TO DEVELOP NORTH OF THE AREA AND AFFECT THE AREA OVERNIGHT. THEREFORE...WILL KEEP TEMPO GROUPS FOR THUNDER IN THE FCST FROM THIS EVENING ON INTO TUESDAY MORNING FOR ALL OF THE TAF SITES. THIS WILL DROP CONDITIONS IN MVFR AND IFR RANGES. && .PRELIMINARY POINT TEMPS/POPS... TUL 67 84 64 88 / 80 70 10 10 FSM 67 79 65 87 / 60 90 10 10 MLC 69 84 64 90 / 70 80 10 10 BVO 65 85 61 87 / 80 60 10 10 FYV 66 77 61 85 / 70 90 10 10 BYV 66 76 61 84 / 60 90 10 10 MKO 67 82 63 87 / 80 80 10 10 MIO 65 78 61 86 / 80 80 10 10 F10 67 84 63 89 / 80 70 10 10 HHW 70 83 67 89 / 60 70 10 10 && .TSA WATCHES/WARNINGS/ADVISORIES... OK...NONE. AR...NONE. && AVIATION...10.
Hazardous weather outlook, Jul 20, 5:04 AM CDT, 7 hours 32 minutes before
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</html>In the hours before
Special weather statement, Jul 20, 12:36 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1236 PM CDT MON JUL 20 2009
ARZ011-201815-
MADISON AR-
1236 PM CDT MON JUL 20 2009
...SIGNIFICANT WEATHER ALERT...
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 115 PM CDT
FOR THE FOLLOWING COUNTY...
IN NORTHWEST ARKANSAS
CENTRAL MADISON
AT 1237 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3
MILES NORTHEAST OF GEORGETOWN...MOVING SOUTHEAST AT 5 MPH. SOME
LOCATIONS THAT WILL BE AFFECTED BY THIS STORM INCLUDE...GEORGETOWN...
HUNTSVILLE...AURORA...WESLEY...WITTER AND JAPTON.
THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
50 MPH.
LAT...LON 3599 9357 3585 9386 3601 9395 3606 9394
3616 9380
TIME...MOT...LOC 1737Z 318DEG 6KT 3603 9380The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 6:22 PM CDT | Special Weather Statement | TSA | Sequoyah | 23 min |
| Jul 20, 12:40 PM CDT | Special Weather Statement | TSA | Madison | 35 min |
| Jul 20, 1:23 PM CDT | Special Weather Statement | TSA | Carroll | 37 min |
| Jul 20, 1:27 PM CDT | Severe Thunderstorm Warning | TSA | Carroll | 36 min |
| Jul 20, 2:01 PM CDT | Special Weather Statement | TSA | Madison | 44 min |
| Jul 20, 2:41 PM CDT | Special Weather Statement | TSA | Madison | 34 min |
| Jul 20, 3:08 PM CDT | Special Weather Statement | TSA | Madison | 37 min |
| Jul 20, 3:11 PM CDT | Special Weather Statement | TSA | Madison | 34 min |
| Jul 20, 3:44 PM CDT | Special Weather Statement | TSA | Benton | 46 min |
Nearby
Special Weather Statements in Arkansas, 2009Every 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.