Alert archive / Illinois / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 49, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at May 17, 1991, 9:56 PM CDT for Logan County, Sangamon County, Illinois. It was in force for 49 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 17, 1991, 9:56 PM CDT (02:56 UTC)
- Expired
- May 17, 1991, 10:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Logan County, IL, Sangamon County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 17, 10:45 PM CDT | Thunderstorm Wind 70 | Logan, IL |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 00:00Z, 2.9 hours before the alert went out and 327 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
- 1491 J/kg
- Mixed-layer CIN
- -208 J/kg
- Mixed-layer LCL
- 1263 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSPI 180256
SVRSPI
ILC167-107-180345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD IL
956 PM CDT FRI MAY 17 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1045 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE CENTRAL PART OF ILLINOIS
EXTREME NORTHERN SANGAMON...LOGAN
AT 930PM...64 MPH WINDS WERE REPORTED AT PETERSBURG ILLINOIS WHICH
IS 20 MILES NORTHWEST OF SPRINGFIELD.
ALSO...AT 940 PM...THERE WAS A REPORT OF TREES BEING BLOWN DOWN IN
GREENVIEW ABOUT 25 MILES NORTH NORTHWEST OF SPRINGFIELD IN MENARD
COUNTY.
THESE SEVERE STORMS WERE MOVING EAST AT 20 MPH.
IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND DANGEROUS LIGHTNING.
REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
ATTN ISP DIST...9
NAMEWhat 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, May 17, 4:20 PM CDT, 5 hours 36 minutes before
ILZ005>007-009-172215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 415 PM CDT FRI MAY 17 1991 ...TORNADO WATCH IN EFFECT FOR MUCH OF WEST CENTRAL ILLINOIS TILL 9 PM CDT... AT 410 PM...RADAR INDICATED A STRONG THUNDERSTORM IN NORTHERN WARREN COUNTY ABOUT 5 MILES NORTH OF MONMOUTH. THIS STORM WAS MOVING NORTHEAST AT 30 MPH AND WILL MOVE OUT OF WARREN AND AFFECT THE NORTHWESTERN PORTIONS OF KNOX COUNTY. TOWNS IN THE VICINITY OF THIS STORM ARE RIO AND ONTARIO. TORNADOES...LARGE HAIL AND HEAVY RAINS ARE POSSIBLE WITH THIS STORM. MOGGED
Special weather statement, May 17, 4:57 PM CDT, 4 hours 59 minutes before
ILZ009-010-172300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 4 55 PM CDT FRI MAY 17 1991 ...TORNADO WATCH UNTIL 9 PM CDT FOR PORTIONS OF CENTRAL AND EASTERN ILLINOIS... AT 455 PM CDT WEATHER RADAR INDICATED SHOWERS AND THUNDERSTORMS OVER CENTRAL VERMILION COUNTY. THUNDERSTORMS CONTINUED TO DEVELOP WEST OF DANVILLE...NEAR OAKWOOD AND MOVE EAST NORTHEAST AT 25 MPH TOWARD DANVILLE. AT 450 PM...DANVILLE FIRE DEPARTMENT REPORTED HEAVY RAINS AND STREET FLOODING. HEAVY RAINS WILL CONTINUE OVER CENTRAL VERMILION COUNTY THROUGH 6 PM AS THESE STORMS CONTINUE TO DEVELOP. OTHERWISE...NO THUNDERSTORMS OR SEVERE WEATHER HAVE BEEN OBSERVED OVER CENTRAL OR EAST CENTRAL I LLINOIS SINCE 4 PM. DB
Special weather statement, May 17, 5:19 PM CDT, 4 hours 37 minutes before
ILZ005>007-009-172315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 515 PM CDT FRI MAY 17 1991 ...TORNADO WATCH IN EFFECT FOR MUCH OF WEST CENTRAL ILLINOIS TILL 9 PM CDT... AT 510 PM...RADAR INDICATED A STRONG THUNDERSTORM IN SOUTHERN HENRY COUNTY NEAR THE TOWN OF ALPHA. THIS STORM IS MOVING EAST NORTHEAST AT AROUND 30 MPH. THIS WILL AFFECT THE NORTHWEST PORTIONS OF BUREAU COUNTY BY 6 PM. TOWNS THAT WILL BE AFFECTED BY THIS STORM ARE THOMAS...NEW BEDFORD AND MANLIUS. ANOTHER STORM LOCATED 30 MILES SOUTHWEST OF BURLINGTON WILL CROSS THE MISSISSIPPI RIVER AROUND 6 PM AFFECTING NORTHERN HENDERSON AND WARREN COUNTIES. THESE ARE STRONG STORMS WITH HEAVY RAIN FALL...LARGE HADIL AND POSSIBLE TORNADOES. MOGGED
Special weather statement, May 17, 6:05 PM CDT, 3 hours 51 minutes before
ILZ009-010-180000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 6 00 PM CDT FRI MAY 17 1991 ...TORNADO WATCH UNTIL 9 PM CDT FOR PORTIONS OF CENTRAL AND EASTERN ILLINOIS... AT 600 PM CDT WEATHER RADAR INDICATED SHOWERS AND THUNDERSTORMS EXTENDING FROM NORTHEASTERN DOUGLAS COUNTY NEAR NEWMAN...EASTWARD ALONG THE VERMILION...EDGAR COUNTY LINES. THE CELLS CONTINUED TO DEVELOP IN THESE AREAS AND MOVE EASTWARD AT 25 MPH. THUNDERSTORMS WERE ALSO OVER NORTHWESTERN AND SOUTHWESTERN ILLINOIS. OTHERWISE...NO THUNDERSTORMS WERE OVER CENTRAL OR EAST CENTRAL ILLINOIS. TEMPERATURES WILL REMAIN IN THE 80S THIS EVENING...WINDS WILL BE SOUTH 10 TO 20 MPH EXCEPT OVER PORTIONS OuF EAST CENTRAL ILLINOIS...THEY WILL BE EAST TO NORTHEAST 10 TO 20 MPH...AND TEMPERATURES WILL BE IN THE 70S. DB
Special weather statement, May 17, 8:01 PM CDT, 1 hour 55 minutes before
ILZ009-010-180200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 8 00 PM CDT FRI MAY 17 1991 ...TORNADO WATCH UNTIL 9 PM CDT FOR PORTIONS OF EAST CENTRAL ILLINOIS... ...TORNADO WATCH UNTIL MIDNIGHT FOR MOST OF CENTRAL ILLINOIS... AT 800 PM CDT NO PRECIPITATION WAS FALLING ACROSS CENTRAL OR EAST CENTRAL ILLINOIS. THUNDERSTORMS HAVE BEEN MOVING ACROSS WEST CENTRAL AND NORTHWESTERN ILLINOIS. IT IS EXPECTED THESE STORMS WILL 3MOVE OVER PORTIONS OF CENTRAL ILLINOIS BY MIDNIGHT. DB
Special weather statement, May 17, 8:59 PM CDT, 57 minutes before
ILZ009-010-180300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPRINGFIELD IL 9 00 PM CDT FRI MAY 17 1991 ...TORNADO WATCH UNTIL MIDNIGHT FOR MOST OF CENTRAL AND PORTIONS OF EAST CENTRAL ILLINOIS... AT 900 PM CDT WEATHER RADARS SHOWS AN AREA OF SHOWERS AND THUNDERSTORMS NORTH OF A LINE FROM QUINCY TO PEORIA TO 30 MILES SOUTH OF PONTIAC ILLINOIS. THESE THUNDERSTORMS WAS MOVING EAST AT 20 MPH THUNDERSTORMS CONTINUE TO MOVE ACROSS WEST CENTRAL AND NORTHWESTERN ILLINOIS. IT IS EXPECTED THESE STORMS WILL MOVE OVER PORTIONS OF CENTRAL ILLINOIS BETWEEN 10 AND 11 PM. HILLIARD
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 7:26 PM CDT | Severe Thunderstorm Warning | ILX | Putnam | 64 min |
| May 17, 7:38 PM CDT | Severe Thunderstorm Warning | ILX | McDonough, Warren | 67 min |
| May 17, 7:56 PM CDT | Severe Thunderstorm Warning | ILX | McLean | 34 min |
| May 17, 8:11 PM CDT | Tornado Warning | ILX | Fulton, Knox, Peoria | 64 min |
| May 17, 8:50 PM CDT | Tornado Warning | ILX | Fulton, Peoria | 55 min |
| May 17, 9:24 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Mason, Tazewell, Woodford | 66 min |
| May 17, 9:28 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Menard | 47 min |
| May 17, 10:41 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Macon, Piatt | 49 min |
| May 17, 10:48 PM CDT | Tornado Warning | ILX | Macon | 42 min |
| May 17, 11:09 PM CDT | Tornado Warning | ILX | Mason | 66 min |
| May 17, 11:11 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Douglas | 49 min |
| May 17, 11:11 PM CDT | Severe Thunderstorm Warning | ILX | Coles, Moultrie | 49 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.