Alert archive / Missouri / Tornado Watches in 2007
Tornado Watch 701
The Storm Prediction Center issued this tornado watch at Oct 2, 2007, 5:47 PM CDT for 14 counties in Illinois; 19 counties in Missouri. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 2, 2007, 5:47 PM CDT (22:47 UTC)
- Expired
- Oct 2, 2007, 10:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 33 counties
Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Mason County, IL, Menard County, IL, Morgan County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Franklin County, MO, Gasconade County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 22:48 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 60%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 2, 6:16 PM CDT | Tornado Warning | LSX | Adams, Brown, Pike | 59 min |
| Oct 2, 6:17 PM CDT | Tornado Warning | LSX | Lincoln, Montgomery, Pike | 26 min |
| Oct 2, 6:20 PM CDT | Tornado Warning | LSX | Adams, Brown, Pike | 40 min |
| Oct 2, 6:46 PM CDT | Tornado Warning | ILX | Cass, Schuyler | 33 min |
| Oct 2, 7:07 PM CDT | Tornado Warning | LSX | Lincoln, Warren | 38 min |
| Oct 2, 7:47 PM CDT | Tornado Warning | LSX | Calhoun, Jersey | 43 min |
| Oct 2, 7:54 PM CDT | Tornado Warning | LSX | Greene | 36 min |
| Oct 2, 8:15 PM CDT | Tornado Warning | ILX | Morgan, Scott | 45 min |
| Oct 2, 8:31 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 44 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 221 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1032 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 022246
SEL1
SPC WW 022246
ILZ000-MOZ000-030300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 701
NWS STORM PREDICTION CENTER NORMAN OK
545 PM CDT TUE OCT 2 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
WEST CENTRAL ILLINOIS
NORTHEAST MISSOURI
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 545 PM UNTIL
1000 PM CDT.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES EAST NORTHEAST OF
QUINCY ILLINOIS TO 35 MILES EAST SOUTHEAST OF JEFFERSON CITY
MISSOURI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
OTHER WATCH INFORMATION...CONTINUE...WW 700...
DISCUSSION...DISCRETE SUPERCELLS HAVE FORMED WITHIN THE LARGER BAND
OF CONVECTION ACROSS E/NE MO THIS AFTERNOON. CONTINUED LOW-LEVEL
MOISTENING TO THE E OF THE ONGOING STORMS...ALONG WITH STRONG
LOW-LEVEL AND DEEP LAYER SHEAR...WILL MAINTAIN THE THREAT FOR A FEW
TORNADOES THROUGH THIS EVENING ACROSS NE MO INTO W CENTRAL IL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24035.
...THOMPSONSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 2, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Pike | 7 hr |
| Oct 2, 6:16 PM CDT | Mesoscale Discussion | SPC | Mercer | 59 min |
| Oct 2, 2:32 PM CDT | Mesoscale Discussion | SPC | Audrain, Barry, Barton, Bates, Benton, Boone and 38 more | 118 min |
| Oct 2, 3:31 PM CDT | Mesoscale Discussion | SPC | Andrew, Buchanan, Caldwell, Clinton, Daviess, DeKalb and 7 more | 59 min |
| Oct 2, 6:53 PM CDT | Mesoscale Discussion | SPC | Barton, Bates, Benton, Camden, Cedar, Cooper and 21 more | 97 min |
Nearby
Tornado Watches in Missouri, 2007Tornado Watches in Illinois, 2007Every tornado watch 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.