Alert archive / Illinois / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 97, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Nov 26, 1990, 8:47 PM CST for Clinton County, Washington County, Illinois. It was in force for 43 min.
The area
The counties it named.
The facts
- Issued
- Nov 26, 1990, 8:47 PM CST (02:47 UTC)
- Expired
- Nov 26, 1990, 9:30 PM CST
- In force
- 43 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Clinton County, IL, Washington County, IL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 00:00Z, 2.8 hours before the alert went out and 169 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
- 67 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 758 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 361 m²/s²
- 0-3 km storm-relative helicity
- 448 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 270254 SVRSTL ILC027-145-189-270330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 847 PM CST MON NOV 26 1990 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS...S... IN SOUTH CENTRAL ILLINOIS ...CLINTON COUNTY...PERRY COUNTY...WASHINGTON COUNTY AT 845 PM CST A LINE OF SEVERE THUNDERSTORMS WAS MOVING INTO THE ILLINOIS COUNTIES OF CLITON..WASHINGTON AND PERRY. THE STORMS CONTAIN STRONG DAMAGING WINDS...BRIEF HEAVY RAIN AND SMALL HAIL. WIND DAMAGE TO TREES AND ROOFS WAS REPORTED IN WOOD RIVER ILLINOIS AT 755 PM CST. THE LINE OF THUNDERSTORMS WAS MOVING EAST AT 40 MPH. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HASN PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
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.
In the hours before
Special weather statement, Nov 26, 6:18 PM CST, 2 hours 29 minutes before
MOZALL-270300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 610 PM CST MON NOV 26 1990 ...THUNDERSTORMS OVER SOUTHWEST MISSOURI WILL SPREAD NORTHEAST INTO THE GREATER ST LOUIS AREA EARLY TONIGHT... A PERIOD OR TWO OF SHOWERS AND THUNDERSTORMS ARE EXPECTED IN THE GREATER ST LOUIS METRO AREA BETWEEN 630 AND 830 PM THIS EVENING. BRIEF HEAVY RAIN AND GUSTY WINDS WILL ACCOMPANY THE THUNDERSTORMS. WIND GUSTS OF 25 TO 45 MPH FORM THEU SOUTH ARE LIKELY AS THE STORMS MOVE ACROSS THE METRO AREA. LATER TONIGHT A PERIOD OR TWO OF SHOWERS AND THUNDERSHOWERS ARE LIKELY. TEMPERATURES SHOULD HOLD IN THE 60S THROUGHOUT THE NIGHT. SLAUGHTER
Special weather statement, Nov 26, 8:32 PM CST, 15 minutes before
MOZALL-270330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 830 PM CST MON NOV 26 1990 ...A LINE OF THUNDERSTORMS IN THE EAST ST LOUIS AND BELLEVILLE ILLINOIS AREA WAS MOVING EAST INTO SOUTH CENTRAL ILLINOIS... AT 830 PM CST A LINE OF STRONG THUNDERSTORMS WAS MOVING EAST THROUGH THE ILLINOIS COUNTIES OF MADISON...ST CLAIR AND RANDOLPH. SOME OF THESE STORMS WERE PRODUCING VERY HEAVY RAIN...STRONG GUSTY WINDS AND SMALL HAIL. + WIND GUSTS OF 30 TO 50 MPH ARE LIKELY BETWEEN 830 AND 1000 PM TONIGHT AS THESE STORMS MOVE EAST INTO SOUTH CENTRAL ILLINOIS. FOR THE REST OF NIGHT PERIODS OF THUNDERSTORMS ARE EXPECTED WITH BRIEF HEAVY RAIN AND GUSTY WINDS. SLAUGHTER
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 26, 8:47 PM CST | Severe Thunderstorm Warning | LSX | Perry | 43 min |
| Nov 27, 12:47 PM CST | Severe Thunderstorm Warning | LSX | Pike | 43 min |
| Nov 27, 1:17 PM CST | Severe Thunderstorm Warning | LSX | Adams, Brown | 28 min |
| Nov 27, 3:02 PM CST | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 43 min |
| Nov 27, 3:23 PM CST | Severe Thunderstorm Warning | LSX | Madison | 67 min |
| Nov 27, 3:38 PM CST | Tornado Warning | LSX | Jersey | 37 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1990Every severe thunderstorm warning in 1990
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.