Alert archive / Illinois / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 1, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Mar 27, 1998, 7:43 PM CST for Ford County, Livingston County, Illinois. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 27, 1998, 7:43 PM CST (01:43 UTC)
- Expired
- Mar 27, 1998, 8:15 PM CST
- In force
- 32 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
Counties Ford County, IL, Livingston County, IL
The radar
The Chicago radar (KLOT), 99 km from the middle of the area, began a volume at 01:42 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 |
|---|---|---|---|
| Mar 27, 6:15 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.7 hours before the alert went out and 68 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
- 1945 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 223 m²/s²
- 0-3 km storm-relative helicity
- 290 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Mar 27, 6:23 PM CST, 1 hour 20 minutes before
ILZ003>006-008-010>014-019>023-032-039-INZ001-280203- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 623 PM CST FRI MAR 27 1998 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 1100 PM CST TONIGHT... THE FIRST SEVERE THUNDERSTORM WATCH OF THE YEAR FOR NORTHEAST ILLINOIS HAS BEEN ISSUED THIS AFTERNOON. THE FIRST LINE OF SHOWERS STRETCHES FROM JUST NORTH OF BURLINGTON IOWA TO SPRINGFIELD ILLINOIS AT 615 PM. THIS LINE WILL REACH A ROCKFORD TO PONTIAC LINE BY 900 PM TONIGHT AND A MCHENRY TO KANKAKEE LINE BY 1000 PM. THE MAIN THREAT TONIGHT IS STRONGER WINDS. THE INTENSITY OF THE WEATHER PATTERN INFLUENCING THE AREA IS STRONG ENOUGH TO ALREADY PROMPT A HIGH WIND ADVISORY. THIS ADVISES FOR GUSTS TO 45 MPH OR HIGHER. WITH THE APPROACHING LINE OF STRONG SHOWERS...NO LIGHTNING ACCOMPANIES THESE SHOWERS TO CALL THEM THUNDERSTORMS...ANY SMALL DOWNBURST COULD COMBINE WITH THE ADVISORY WINDS TO PRODUCE GUSTS AT OR ABOVE 60 MPH. WINDS AT THAT STRENGTH CAN DO CONSIDERABLE DAMAGE. THE SHOWERS ARE LIKELY TO BE OUT OF NORTHEAST ILLINOIS BY 1100 PM CST TONIGHT. BRUMER
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 7:43 PM CST | Severe Thunderstorm Warning | LOT | LaSalle | 32 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1998Every severe thunderstorm warning in 1998
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.