Severe Thunderstorm Watch 21

Issued

Apr 3, 2015, 1:52 AM CDT (06:52 UTC)

Expired

Apr 3, 2015, 6:00 AM CDT

In force

4 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

70 kt

The Springfield radar (KSGF), 33 km from the middle of the area, began a volume at 06:52 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.

Two or more tornadoes

10%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 193Apr 2, 10:12 PM CDT
• Mesoscale Discussion 195Apr 3, 1:16 AM CDT
• Mesoscale Discussion 198Apr 3, 4:37 AM CDT

235 
WWUS20 KWNS 030651
SEL1  
SPC WW 030651
ARZ000-KSZ000-MOZ000-OKZ000-031100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 21
NWS STORM PREDICTION CENTER NORMAN OK
150 AM CDT FRI APR 3 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  NORTHWESTERN ARKANSAS
  EXTREME SOUTHEASTERN KANSAS
  SOUTHERN MISSOURI
  EXTREME NORTHEASTERN OKLAHOMA

* EFFECTIVE THIS FRIDAY MORNING FROM 150 AM UNTIL 600 AM CDT.

* PRIMARY THREATS INCLUDE...
  SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
    TO 80 MPH POSSIBLE
  ISOLATED VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER
    POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES WEST NORTHWEST
OF JOPLIN MISSOURI TO 30 MILES NORTHEAST OF WEST PLAINS MISSOURI.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 17...WW 18...WW 19...WW
20...

DISCUSSION...SVR MCS WITH HISTORY OF SEVERAL SIGNIFICANT-SVR GUSTS
AND SPORADIC LARGE/DAMAGING HAIL REMAINS WELL-ORGANIZED AND WILL
CROSS WW AREA...EVENTUALLY MOVING INTO MORE STABLE AIR BUT
CONTINUING HAIL/WIND THREAT IN MEANTIME.  REF SPC MESOSCALE
DISCUSSION 195 FOR ADDITIONAL/NEAR-TERM METEOROLOGICAL DETAILS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29050.


...EDWARDS

Severe Thunderstorm Watches in Missouri, 2015Severe Thunderstorm Watches in Oklahoma, 2015Severe Thunderstorm Watches in Kansas, 2015Every severe thunderstorm watch in 2015

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.