Alert archive / Arkansas / Special Weather Statements in 2007

Special Weather Statement, NWS Tulsa, OK

May 7, 2007Crawford County, Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this special weather statement at May 7, 2007, 9:52 AM CDT for Crawford County, Franklin County, Sebastian County, Arkansas. It was in force for 23 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: May 7, 2007, 9:52 AM CDT (14:52 UTC)
Expired: May 7, 2007, 10:15 AM CDT
In force: 23 min
Issued by: NWS Tulsa, OK

Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 2 km from the middle of the area, began a volume at 14:55 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, 2.9 hours before the alert went out and 184 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: 275 J/kg
Mixed-layer CIN: -287 J/kg
Mixed-layer LCL: 986 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 May 7, 9:16 AM CDT, 36 minutes earlier.

Area forecast discussion, May 7, 9:16 AM CDT, 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
916 AM CDT MON MAY 7 2007

.DISCUSSION...
HAVE EXPANDED FLASH FLOOD WATCH TO INCLUDE MOST OF EASTERN
OKLAHOMA AND HAVE ALSO EXTENDED IT THROUGH TUESDAY AS ANY
ADDITIONAL RAINFALL ON TOP OF THE 2 TO 4 INCH AMOUNTS THIS MORNING
SURE TO CAUSE TROUBLE. COMPLEX OF THUNDERSTORMS NOT APPEARING TO
SLOW DOWN AND SHOULD ULTIMATELY AFFECT ALL COUNTIES TO A DEGREE
THROUGH THE MORNING. A GENERAL WEAKENING TREND HAS BEEN NOTED BUT
VERY HIGH MOISTURE CONTENT STILL JUSTIFIES 2 INCH PLUS HOURLY
RAINFALL RATES WITH HEAVIER EMBEDDED CELLS. BACK EDGE HAS BECOME
DEFINED NEAR OKC AND RAIN CHANCES WILL DIMINISH OVER NE OKLAHOMA
DURING THE NEXT FEW HOURS. ATMOSPHERE SHOULD BE WORKED OVER
ENOUGH TO PREVENT MUCH ADDITIONAL DEVELOPMENT THIS AFTERNOON...
HOWEVER NEED TO KEEP AN EYE ON DEVELOPING CONVECTION OVER NORTH
TEXAS THIS MORNING.

SFC BOUNDARY WILL BECOME ESTABLISHED TO OUR SOUTH AS A RESULT OF
THE MORNING STORMS AND WILL BECOME FOCUS OF ADDITIONAL HEAVY RAIN
AS IT APPEARS LIKELY THAT ANOTHER COMPLEX WILL DEVELOP TO THE
SOUTHWEST THIS EVENING AND AFFECT AT LEAST PORTIONS OF THE AREA
OVERNIGHT. THIS MORNINGS ACTIVITY HAS EFFECTIVELY PRIMED THE
PUMP AND MORE FLOODING WILL BE A BIG CONCERN AGAIN TONIGHT AND
EARLY TUESDAY. WILL LIKELY NEED TO REFINE THE WATCH WITH LATER
FORECASTS.

ALSO WILL NEED TO LOOK AT TEMPS AS RAIN COOLED AIR MAY BE TOUGH TO
MODIFY AND THUS GOING HIGH TEMPS WILL BE DIFFICULT TO ACHIEVE.

&&

.PREV DISCUSSION... /ISSUED 402 AM CDT MON MAY 7 2007/

DISCUSSION...
AN ACTIVE PERIOD NEXT 36 HOURS. GENERALLY SUB-SEVERE
LINE OF THUNDER..FOR NORTHWEST PORTION OF TULSA AREA
AT THIS TIME. HOWEVER...RAINFALL APPROACHING FFG #S
FROM EARLIER ROUND OF CONVECTION. FLOOD WATCH ISSUED.
MAIN STREAM / LARGER RIVERS WILL ALSO RESPOND... AND
MAY NEED A FLOOD WATCH FOR THAT AS WELL LATER TODAY.
EXPECT THUNDER TO PROGRESS FAIR DISTANCE INTO IF NOT
THROUGH CWA BEFORE GIVING WAY TO DIURNAL DEATH. MORE
BOUNDARIES WILL BE SET UP FOR ADDITIONAL  CONVECTION
LATE TODAY OR OVERNIGHT TONIGHT.  UNSEASONABLY MOIST
ATMOSPHERE / HIGH PWA VALUES WILL LIKELY PROMPT MORE
FLOOD WATCHES... BUT DID NOT WANT TO USE THE SHOTGUN
APPROACH AT THIS TIME IN HOPE THAT LATER MODELS WILL
MORE IN SYNC.  GW

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   83  67  81  62 / 100  90  40  30
FSM   87  68  84  64 /  90  50  50  30
MLC   84  68  80  63 / 100  70  30  50
BVO   80  62  79  60 /  90  80  40  30
FYV   82  66  79  60 / 100  60  50  30
BYV   81  66  78  60 / 100  50  50  30
MKO   83  68  79  63 / 100  70  40  40
MIO   82  66  80  60 / 100  50  50  30
F10   83  68  79  62 / 100  70  40  40
HHW   84  67  81  63 /  80  40  20  40

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...FLASH FLOOD WATCH UNTIL 7 PM TUESDAY FOR OKZ054-OKZ055-OKZ056-
     OKZ057-OKZ058-OKZ059-OKZ060-OKZ061-OKZ062-OKZ063-OKZ064-
     OKZ065-OKZ066-OKZ067-OKZ068-OKZ069-OKZ070-OKZ071-OKZ072-
     OKZ073-OKZ074-OKZ075.

AR...NONE.
&&

SHORT TERM...14
LONG TERM....07

Hazardous weather outlook, May 7, 9:00 AM CDT, 52 minutes before

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In the hours before

Special weather statement, May 7, 6:53 AM CDT, 2 hours 59 minutes before

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Local storm report, May 7, 7:12 AM CDT, 2 hours 40 minutes before

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Special weather statement, May 7, 8:08 AM CDT, 1 hour 44 minutes before

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Special weather statement, May 7, 8:35 AM CDT, 1 hour 17 minutes before

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Special weather statement, May 7, 8:40 AM CDT, 1 hour 12 minutes before

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Special weather statement, May 7, 9:52 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
952 AM CDT MON MAY 7 2007

ARZ019-020-029-OKZ072-076-071515-
CRAWFORD AR-FRANKLIN AR-LE FLORE OK-SEBASTIAN AR-SEQUOYAH OK-
952 AM CDT MON MAY 7 2007

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1015 AM CDT
FOR THE FOLLOWING COUNTIES:

IN WEST CENTRAL ARKANSAS
     SEBASTIAN AND FRANKLIN

IN NORTHWEST ARKANSAS
     CRAWFORD

IN EAST CENTRAL OKLAHOMA
     EASTERN SEQUOYAH

IN SOUTHEAST OKLAHOMA
     NORTHEASTERN LE FLORE

AT 952 AM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES
NORTHEAST OF POCOLA...MOVING NORTH AT 20 MPH. A LARGE PORTION OF
SEBASTIAN...CRAWFORD...FRANKLIN...EASTERN SEQUOYAH AND NORTHEASTERN
LE FLORE COUNTIES WILL BE AFFECTED BY THESE STORMS THROUGH 1015 AM
CDT.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ALERT IS UPGRADED TO A WARNING.

LAT...LON 3496 9484 3515 9403 3576 9369 3573 9443

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 8:15 PM CDT	Special Weather Statement	TSA	Nowata	15 min
May 6, 8:44 PM CDT	Special Weather Statement	TSA	Tulsa	31 min
May 6, 8:52 PM CDT	Special Weather Statement	TSA	Tulsa	53 min
May 6, 8:55 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	65 min
May 6, 9:17 PM CDT	Special Weather Statement	TSA	Osage	28 min
May 6, 9:26 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	48 min
May 6, 9:31 PM CDT	Special Weather Statement	TSA	Tulsa	29 min
May 6, 9:32 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	51 min
May 6, 9:42 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Rogers, Tulsa, Washington	48 min
May 6, 9:58 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee	56 min
May 6, 10:06 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	54 min
May 6, 10:31 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	59 min
May 6, 10:35 PM CDT	Special Weather Statement	TSA	Nowata	25 min
May 6, 10:38 PM CDT	Severe Thunderstorm Warning	TSA	Osage	67 min
May 6, 11:00 PM CDT	Severe Thunderstorm Warning	TSA	Osage	48 min
May 6, 11:04 PM CDT	Special Weather Statement	TSA	Pawnee	41 min
May 6, 11:30 PM CDT	Severe Thunderstorm Warning	TSA	Washington	48 min
May 6, 11:40 PM CDT	Special Weather Statement	TSA	Pawnee	35 min
May 6, 11:49 PM CDT	Special Weather Statement	TSA	Nowata	26 min
May 7, 12:01 AM CDT	Special Weather Statement	TSA	Pawnee	44 min
May 7, 12:20 AM CDT	Special Weather Statement	TSA	Osage	40 min
May 7, 12:56 AM CDT	Special Weather Statement	TSA	Washington	34 min
May 7, 1:12 AM CDT	Severe Thunderstorm Warning	TSA	Osage	52 min
May 7, 1:33 AM CDT	Special Weather Statement	TSA	Osage	27 min
May 7, 1:50 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	40 min
May 7, 2:34 AM CDT	Special Weather Statement	TSA	Washington	41 min
May 7, 2:40 AM CDT	Special Weather Statement	TSA	Nowata, Washington	50 min
May 7, 3:31 AM CDT	Special Weather Statement	TSA	Craig, Creek, Nowata, Okfuskee, Okmulgee, Ottawa and 2 more	59 min
May 7, 3:46 AM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more	24 hr
May 7, 3:57 AM CDT	Severe Thunderstorm Warning	TSA	Creek	48 min
May 7, 4:45 AM CDT	Special Weather Statement	TSA	Cherokee, Craig, Delaware, Mayes, Muskogee, Okfuskee and 4 more	60 min
May 7, 5:21 AM CDT	Flash Flood Warning	TSA	Rogers, Tulsa, Wagoner	6 hr
May 7, 6:14 AM CDT	Flash Flood Warning	TSA	Creek, Tulsa	4 hr
May 7, 6:14 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pushmataha	61 min
May 7, 6:34 AM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	56 min
May 7, 6:40 AM CDT	Special Weather Statement	TSA	Okmulgee	35 min
May 7, 6:53 AM CDT	Special Weather Statement	TSA	Cherokee	37 min
May 7, 7:53 AM CDT	Flash Flood Warning	TSA	Cherokee	4 hr
May 7, 8:08 AM CDT	Special Weather Statement	TSA	Cherokee	52 min
May 7, 8:35 AM CDT	Special Weather Statement	TSA	Pittsburg	40 min
May 7, 8:40 AM CDT	Special Weather Statement	TSA	Okfuskee	65 min
May 7, 10:02 AM CDT	Special Weather Statement	TSA	Pittsburg	43 min
May 7, 12:16 PM CDT	Flash Flood Warning	TSA	Pittsburg	4 hr
May 7, 12:50 PM CDT	Special Weather Statement	TSA	Choctaw, Pushmataha	55 min
May 7, 1:25 PM CDT	Flash Flood Warning	TSA	Latimer	3 hr
May 7, 2:27 PM CDT	Special Weather Statement	TSA	LeFlore	48 min
May 7, 3:11 PM CDT	Special Weather Statement	TSA	Franklin	34 min
May 7, 3:14 PM CDT	Special Weather Statement	TSA	Sebastian	31 min

Nearby

Special Weather Statements in Arkansas, 2007 Every special weather statement in 2007

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.