Alert archive / Illinois / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 13, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Apr 26, 1994, 9:15 PM CDT for Ford County, Livingston County, Illinois. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Apr 26, 1994, 9:15 PM CDT (02:15 UTC)
- Expired
- Apr 26, 1994, 10:00 PM CDT
- In force
- 45 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
Counties Ford County, IL, Livingston County, IL
The nearest sounding before it
Dayton/James M C, OH (KDAY), launched 00:00Z, 2.3 hours before the alert went out and 367 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
- 981 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1633 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.0
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, Apr 26, 4:58 PM CDT, 4 hours 17 minutes before
ILZ014-021>023-270000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 456 PM CDT TUE APR 26 1994 ...THUNDERSTORMS HAVE DEVELOPED OVER NORTHEAST ILLINOIS LATE THIS AFTERNOON... AT 450 PM NATIONAL WEATHER SERVICE RADAR SHOWED THUNDERSTORMS OVER GRUNDY COUNTY. THE STORMS WERE MOVING NORTHEAST AT 55 MPH AND WILL MOVE ACROSS CENTRAL WILL COUNTY INCLUDING JOLIET AND NEW LENOX BETWEEN 500 AND 530 PM. THE STORMS WILL LIKELY REACH SOUTHWESTERN COOK COUNTY AROUND 530 PM. THESE STORMS WILL LIKELY CONTAIN STRONG WINDS...FREQUENT LIGHTNING...AND BRIEF HEAVY RAIN. PEOPLE IN THE PATH OF THESE STORMS SHOULD MOVE INDOORS FOR THEIR PROTECTION. TAYLOR
Special weather statement, Apr 26, 5:53 PM CDT, 3 hours 22 minutes before
ILZ022--013-020-021--032-023-014-270000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 550 PM CDT TUE APR 26 1994 ...THE SEVERE THUNDERSTORMS WARNINGS FOR SOUTHERN COOK AND WESTERN WILL COUNTIES HAVE EXPIRED AT 545 PM... THE SEVERE STORMS ACROSS WILL AND SOUTHERN COOK COUNTIES HAVE WEAKENED SINCE 530 PM. HOWEVER AT 550 PM WEATHER SERVICE DOPPLER RADAR SHOWED STRONG THUNDERSTORMS SCATTERED ACROSS THE SOUTH SIDE OF CHICAGO...OVER LEMONT AND NORTHWEST GRUNDY COUNTY ABOUT 7 MILES NORTHWEST OF MORRIS. ADDITIONAL THUNDERSTORMS WERE DEVELOPING TO THE SOUTHWEST OF CHICAGO BETWEEN PEORIA AND JOLIET. ALL STORMS WERE MOVING TO THE NORTHEAST AT 55 MPH AND WILL LIKELY CONTAIN STRONG WIRNDS...FREQUENT LIGHTNING...AND BRIEF HEAVY RAIN AS THEY TRACK ACROSS THE SOUTH SIDE OF CHICAGO AND SOUTHERN LAKE MICHIGAN. PEOPLE IN THE PATH OF THESE STORMS SHOULD MOVE INDOORS FOR THEIR PROTECTION. RANDALL
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 7:08 PM CDT | Severe Thunderstorm Warning | LOT | Livingston | 28 min |
| Apr 26, 7:27 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 48 min |
| Apr 26, 8:16 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 44 min |
| Apr 26, 8:26 PM CDT | Tornado Warning | LOT | Kankakee | 34 min |
| Apr 26, 8:52 PM CDT | Tornado Warning | LOT | Iroquois | 38 min |
| Apr 26, 9:01 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 29 min |
| Apr 26, 9:31 PM CDT | Tornado Warning | LOT | Iroquois | 29 min |
| Apr 26, 10:30 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 30 min |
| Apr 26, 11:00 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 30 min |
| Apr 26, 9:48 PM CDT | Severe Thunderstorm Warning | LOT | Porter | 27 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1994Every severe thunderstorm warning in 1994
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.