Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 250, NWS St. Louis, MO

June 23, 2000Pike County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 23, 2000, 6:59 PM CDT for Pike County, Illinois. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jun 23, 2000, 6:59 PM CDT (23:59 UTC)
Expired: Jun 23, 2000, 7:45 PM CDT
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Pike County, IL

The radar

The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 00:03 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 23, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 12.0 hours before the alert went out and 208 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1677 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

368 
WUUS53 KLSX 240002
SVRSTL
ILC149-240045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
659 PM CDT FRI JUN 23 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN PIKE COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 745 PM CDT

* AT 659 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM 5 MILES WEST OF PLEASANT HILL...MOVING
  NORTHEAST AT 25 MPH.

* LOCATIONS IN THE PATH...
  PLEASANT HILL
  NEBO
  MARTINSBURG
  PEARL
  BEECREEK
  INDEPENDENCE
  BEDFORD
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3956 9118 3945 9104 3941 9094 3941 9063
          3953 9058 3967 9066

GKS

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 3:35 PM CDT, 3 hours 24 minutes earlier.

Area forecast discussion, Jun 23, 3:35 PM CDT, 3 hours 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
335 PM CDT FRI JUN 23 2000

IN LAST AFD MENTIONED THINKING ABOUT INCREASING POPS FOR BOTH
SATURDAY AND SUNDAY.  HAVE DECIDED ON FFA FOR MUCH OF CWFA BASED ON
LATEST QPFERD PRODUCT AND COORD WITH SURROUNDING OFFICES.  MSAS
CONTINUES TO SHOW LI VALUES NEAR -10 AHEAD OF ONGOING CONVECTION AND
RUC KEEPS THESE VALUES GOING INTO THE NIGHT.  MODEL PRECIP FIELDS
NOT IN AGREEMENT BUT ALL SUPPORT POSSIBILITY OF A HEAVY PRECIP EVENT
THIS EVENING ACROSS NERN MO/SWRN IL AND OVERNIGHT ACROSS CENTRAL
MISSOURI INTO AND NE OF STL METRO AREA.

AS FOR THE WEEKEND...WILL NOT TRY TO TIME THE MOVEMENT AND
INTERACTION OF SEVERAL SHORTWAVES...SFC TROFS...AND OUTFLOW
BOUNDARIES.  ALL MODELS KEEP A SFC FRONT WELL NW OF CWFA EVEN BY SUN
MORNING...SO WILL KEEP PRECIP MENTION INTO MONDAY.

LITTLE CHANGE TO HIGHS/LOWS AND LATER PERIODS.

COORD WITH EAX...SGF...ILX...DVN.

.STL...FLASH FLOOD WATCH FOR PORTIONS OF SOUTHWEST ILLINOIS AND
CENTRAL...NORTHEAST...AND EAST CENTRAL MISSOURI TONIGHT.  SEVERE
THUNDERSTORM WATCH 483 FOR NORTHEAST AND EAST CENTRAL MISSOURI AND
SOUTHWEST ILLINOIS UNTIL 800 PM.

LENNING

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 23, 3:32 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	43 min
Jun 23, 3:49 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	41 min
Jun 23, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Adams	51 min
Jun 23, 5:21 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	39 min
Jun 23, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Brown	45 min
Jun 23, 6:01 PM CDT	Severe Thunderstorm Warning	LSX	Pike	59 min
Jun 23, 6:58 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Macoupin, Montgomery	47 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2000 Every severe thunderstorm warning in 2000

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.